HAPPY HOAX ANNIVERSARY!!! (Rockets can't fly in a vacuum)

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rabinoz

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Re: HAPPY HOAX ANNIVERSARY!!! (Rockets can't fly in a vacuum)
« Reply #510 on: August 11, 2019, 10:27:41 PM »
Exhaust velocity of Ariana 5 rocket (at sea level) : 2749 m/s

So 2740-2740 = 0 m/s = 0 miles per HOUR
If the speed of dissipation (velocity of gas expansion in a vacuum) is equal or greater than exhaust velocity of a rocket, then thrust efficiency is ZERO.
So, I really can run faster than Ariana 5 rocket can fly in a Vacuum, since no rocket can fly in a vacuum, whatsoever!
None of that has the slightest relevance to an Ariana 5 rocket flying in a vacuum and you've never shown that "no rocket can fly in a vacuum".

There is no practical limit to how fast the exhaust as can move in a vacuum.
Your quote seems be only a limit on how fast the exhaust gases can disperse. It other words the gasses do instantly disperse into the "infinite vacuum".
That exhaust gas has been sent far from the Ariana 5 by the and the Ariana 5 is long gone.

So all your claims about being able to "run faster than Ariana 5 rocket can fly in a vacuum" are total hogwash!

Quote from: cikljamas
Rabinoz says :

Quote
The escape velocity from Earth is about 11.186 km/s NOT your 8km/s but the orbital velocity at 200 km is 7784 m/s - close to your figure.

But to even get into a 200 km orbit from the ground a rocket must overcome gravity and air-resistance till it leaves the atmosphere.
Without more details that cannot be calculated but to get to LEO requires approximately the equivalent of an extra 2.6 km/s velocity.

So we'll see if your rocket might even get to LEO.

So here you want to achieve a of 7784 + 2600 = 10,384 m/s.

Yes, but 7784 m/s is the orbital velocity at 200 km, however contrary to known rocket's trajectories, they need to end up going 7 miles per second away from the center of gravity (center of gravity = center of the earth)! So, alleged orbital velocity (even if it were real phenomena, and i doubt it, since i know that the earth is stationary) would still be of no use due to the wrong direction of motion, which is perpendicular wrt needed/demanding direction (away from the center of gravity)!!!
No! A spacecraft does not "need to end up going 7 miles per second away from the center of gravity (center of gravity = center of the earth)!"

Read the following over and over until you understand it!
Since I know that the rocket does not need to go straight UP I would look further and find the whole diagram as in:

From: CalcTool: Escape velocity Calculator

The escape velocity does not have to be directly away from centre of the earth. It can and usually is a tangential velocity.
And "Note that a powered object may escape the gravity of a body at any velocity desired."
Read again,
It is independent of the object mass direction of movement."
And "Note that a powered object may escape the gravity of a body at any velocity desired."


Do you even have the capability of reading, understand what you've read and learning from it?

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Tom Bishop

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Re: HAPPY HOAX ANNIVERSARY!!! (Rockets can't fly in a vacuum)
« Reply #511 on: August 11, 2019, 11:05:41 PM »
It says right in the notes section that it's the distance from the body center of mass.

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rabinoz

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Re: HAPPY HOAX ANNIVERSARY!!! (Rockets can't fly in a vacuum)
« Reply #512 on: August 12, 2019, 12:12:28 AM »
It says right in the notes section that it's the distance from the body center of mass.
Yes, it says that in the box for calculating the speed and in the notes as "from its current distance from the body center of mass" but read the rest of the notes.
Quote
The "escape velocity" of an unpowered object with respect to a massive body is the speed that the object needs to be traveling at in order to escape the gravitational field of the body from its current distance from the body center of mass.

It is independent of the object mass or direction of movement (and therefore is not truly a 'velocity' at all).
The "current distance from the body center of mass" is only needed to calculate the speed necessary.

It is "independent of the . . . direction of movement" and the diagram "(note: direction not matter)"


How could it be stated more explicitly?

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JackBlack

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Re: HAPPY HOAX ANNIVERSARY!!! (Rockets can't fly in a vacuum)
« Reply #513 on: August 12, 2019, 12:59:06 AM »
It says right in the notes section that it's the distance from the body center of mass.
Yes, the distance.
This distance determines the velocity required.
Notice how nowhere does it say the velocity must be directed away from the centre of mass?
Notice how instead it says that direction does not matter (i.e. it is independent from the direction of movement)?

If you want to claim that it requires it to go directly away from the object, please either show the derivation to show that it MUST be going directly away, and/or provide a citation that clearly states it MUST be going directly away.

In addition, please explain what you think would happen to an object going at 100 000 km/s in a direction perpendicular to directly away.
Do you think it will magically be held to Earth?

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Bullwinkle

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Re: HAPPY HOAX ANNIVERSARY!!! (Rockets can't fly in a vacuum)
« Reply #514 on: August 12, 2019, 01:52:41 AM »

Wernher von Braun confirmed that rockets can't leave earth

So did Heiwa.

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cikljamas

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Re: HAPPY HOAX ANNIVERSARY!!! (Rockets can't fly in a vacuum)
« Reply #515 on: August 12, 2019, 03:23:46 AM »
Exhaust velocity of Ariana 5 rocket (at sea level) : 2749 m/s

So 2740-2740 = 0 m/s = 0 miles per HOUR
If the speed of dissipation (velocity of gas expansion in a vacuum) is equal or greater than exhaust velocity of a rocket, then thrust efficiency is ZERO.
So, I really can run faster than Ariana 5 rocket can fly in a Vacuum, since no rocket can fly in a vacuum, whatsoever!
There is no practical limit to how fast the exhaust as can move in a vacuum.
If you really know what you are saying, then you have to be able to expand on this a little bit...I would say that there is no practical limit to how fast the exhaust can move in a vacuum because no exhaust can move so fast as gas is expanding in a vacuum...If that was your point then you hit the nail on the head...

It other words the gasses do instantly disperse into the "infinite vacuum".
That exhaust gas has been sent far from the Ariana 5 by the and the Ariana 5 is long gone.

Only in your wild imagination which is obviously too wild for grasping very simple concepts so not that you can't see the wood for the trees, you actually can't see the tree for the wood! (In croatian we use both versions in everyday speech, and it seems to me that in english there is only one version of this proverb)..


Quote
The escape velocity from Earth is about 11.186 km/s NOT your 8km/s but the orbital velocity at 200 km is 7784 m/s - close to your figure.

But to even get into a 200 km orbit from the ground a rocket must overcome gravity and air-resistance till it leaves the atmosphere.
Without more details that cannot be calculated but to get to LEO requires approximately the equivalent of an extra 2.6 km/s velocity.

So we'll see if your rocket might even get to LEO.

So here you want to achieve a of 7784 + 2600 = 10,384 m/s.
Quote
Yes, but 7784 m/s is the orbital velocity at 200 km, however contrary to known rocket's trajectories, they need to end up going 7 miles per second away from the center of gravity (center of gravity = center of the earth)! So, alleged orbital velocity (even if it were real phenomena, and i doubt it, since i know that the earth is stationary) would still be of no use due to the wrong direction of motion, which is perpendicular wrt needed/demanding direction (away from the center of gravity)!!!

The escape velocity does not have to be directly away from centre of the earth. It can and usually is a tangential velocity.
And "Note that a powered object may escape the gravity of a body at any velocity desired."
Read again,
It is independent of the object mass direction of movement."

Yes, a lot of contradictions, i can write a book 1000 pages thick by quoting contradictory claims of today's scientists (not only of famous astronutts).

For example : they claim that directional gyro is rigid in space, and then they claim that directional gyro drifts 15 degrees per hour even if an airplane doesn't move at all (on a runway) while waiting permission to take off... Only they can't explain how they can use such an instrument for that (directional-compass) purpose (in the first place) if it drifts 15 degrees per hour even when an airplane is at rest.

Then they cut another branch on which they stand :

Wolfie6020 (australian commercial pilot) recently uploaded a video in which he explains how directional gyros are calibrated for certain latitudes, only he failed to explain how airplanes can rely on such calibrated gyros when flying towards north or towards south...lol

So, i repeat these words once again (regarding ZIGZAG problem) :

It means that you have to take into consideration "directional gyro problem," that is to say : If directional gyro maintains rigidity in space, then you have to explain to us : how come that we can't simply direct our gyro towards the sun (or even better - towards some fixed star) so that we can observe rotational motion of the earth as it drifts below our space-rigid-gyro which would constantly (if HC theory were true description of our reality) point towards the sun/fixed star, thus providing for us (for all intents and purposes) our desired ZIGZAG motion, that is to say : mimicking motion of the observer at the edge of the Arctic circle in a straight line, although he is actually moving circularly?

In addition, please explain what you think would happen to an object going at 100 000 km/s in a direction perpendicular to directly away.
Do you think it will magically be held to Earth?

In addition, please explain what you think would happen to an object going at 11 km/s in a direction perpendicular to directly away from the center of the earth.

Nothing would happen, even if that object was already 400 km above the surface of the earth :

6800 km^2 = 46 240 000
11 km^2 = 121

sqrt. 46 240 121 = 6800,008897

So, our 11 km/s moving object in a direction perpendicular to directly away from the center of the earth would move 8,897 m/s directly away from the center of the earth.

8,897 m/s = 32 km/h

Footspeed record was 44.72 km/h (27.8 mph), measured between meter 60 and meter 80 of the 100 meters sprint of the World Championships in Berlin on 16 August 2009 by Usain Bolt. (Bolt's average speed over the course of this race was 37.58 km/h or 23.35 mph.)

I would like to see a man made object that flies at that speed (100 000 km/s)...lol

Just to put it into broader perspective :

Concorde top speed = 2450 km/h = Mach 2
SR-71 Blackbird top speed = 3530 km/h = Mach 2,9
X-15 top speed = 7350 km/h = Mach 6

Geostationary satellites - ALLEGED speed = 9420 km/h = Mach 7,68
ISS ALLEGED speed = 7,66 km/s = 27576 km/h = Mach 22,5 which is 3,75 times faster than X-15's top speed

Escape Velocity of the Earth = 11,18 km/s = 40248 km/h = Mach 32,8 which is 5,47 times faster than X-15's top speed

Now, how about your 1000 km/s = 3 600 000 km/h = Mach 2938,77 which is 490 times faster than X-15's top speed...

So, Jack what do you think would happen to an object at 400 km altitude which was initially travelling at a velocity of 1000 km/s, initially in a direction perpendicular to "down"?

Or better to ask much cleverer question : How do you think you could ever attain such ludicrous?

To fit with   the data he observed   in 1929, Hubble   figured that his “H” constant, which   
was the proportion between the speed of the galaxy compared to its distance away from us,   
would have to be 100   kilometers   per second per megaparsec.
Thus, if a galaxy was   said   to be 10 megaparsecs away from us, Hubble’s Law held that it must recede with  a velocity of 1000  kilometers  per second.
If  the  galaxy were a gigaparsec from    us which is 1000 megaparsecs,   it must recede with a   velocity of   100,000 kilometers per second. So, from now on let's call this speed Jack's velocity!!! lol

100 000 km/s = 360 000 000 km/s = Mach 297877,551 = 48979 times faster than X-15's top speed

The North American X-15 was a hypersonic rocket-powered aircraft operated by the United States Air Force and the National Aeronautics and Space Administration as part of the X-plane series of experimental aircraft. The X-15 set speed and altitude records in the 1960s, reaching the edge of outer space and returning with valuable data used in aircraft and spacecraft design. The X-15's official world record for the highest speed ever recorded by a manned, powered aircraft, set in October 1967 when William J. Knight flew at Mach 6.70 at 102,100 feet (31,120 m), a speed of 4,520 miles per hour (7,274 km/h; 2,021 m/s), has remained unbroken as of 2019.

https://en.wikipedia.org/wiki/North_American_X-15


SPEED OF LIGHT = 299 792 kilometers per second
JACK'S VELOCITY = 100 000 kilometers per second



Beware, Super-Jack is pissed off!!!
Haven't you noticed it, he is going directly away from the center of the earth!!! Bravo Jack!!!
Along the way you may face some challenges, but as long as I wish you luck, everything will be fine. So the best of luck to you on your path! May success be always on your side. Don't be afraid of anything and fly high in life!!!
« Last Edit: August 12, 2019, 04:04:06 AM by cikljamas »
"I can't breathe" George Floyd RIP

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JackBlack

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Re: HAPPY HOAX ANNIVERSARY!!! (Rockets can't fly in a vacuum)
« Reply #516 on: August 12, 2019, 04:52:07 AM »
If you really know what you are saying, then you have to be able to expand on this a little bit
It is quite simple:
Without other particles to collide into there is nothing to stop the gas.
As such if you increase the impulse acting on the gas you will increase its velocity.
The velocity of gas in a vacuum is dependent upon what put it there.
If it was put there by gas at 1 yPa being released then it will travel quite slowly.
If instead it was the result of gas at 1 YPa being released, it will move quite quickly.
If it was released as a tiny 1 ym^3, then it would go quite slowly.
If it was released as a massive 1 Ym^3 then it would go quite quickly.

This is all based upon how much pressure is exerted on it and how long it will be exerted for.
That determines how quickly it accelerates and how for how long.

If you wish to claim there is some magical limit on the velocity of gas in a vacuum you will have to expand on it, a lot, to justify such a claim.

Yes, a lot of contradictions
The only contradicts are between reality and the nonsense you are claiming.

No where in the source (or any source I can find) does it claim that you MUST be heading directly away from the centre of mass to be able to achieve orbit or to escape.
Instead, all we have is your baseless claim.

regarding ZIGZAG problem
Again, go put them in the zig-zag thread. They don't belong here.

In addition, please explain what you think would happen to an object going at 100 000 km/s in a direction perpendicular to directly away.
Do you think it will magically be held to Earth?
I notice you still avoid a nice simple question.
Why is that?

In addition, please explain what you think would happen to an object going at 11 km/s in a direction perpendicular to directly away from the center of the earth.
Nothing would happen, even if that object was already 400 km above the surface of the earth :
6800 km^2 = 46 240 000
11 km^2 = 121
sqrt. 46 240 121 = 6800,008897
So, our 11 km/s moving object in a direction perpendicular to directly away from the center of the earth would move 8,897 m/s directly away from the center of the earth.
Good job contradicting yourself.
Which is it? Will nothing happen or not?

I also notice you only bother with 1 s, and ignore the effects of gravity.
Why such a short time period?
Even for an object going directly away, the change in distance is negligible.
Lets do something similar? I'll even be nice and throw in the extra ~30 km.
What happens after 1 hour?
Well, 11 km/s is 39600 km/hr.
That means it will have moved to ~ 38 800 km away from the centre of Earth, or roughly 38 400 km further than it originally was.
That means the distance from the centre would be growing at a rate of 10.7 km/s.
The longer you let that go on for the closer it will get to 11 km/s.

The more accurate way is to integrate it properly, but I can't be bothered. I will do the next best thing and do it stepwise.
So, we work in 1 s steps (you seemed fine doing that before).
So as an example, after 1 second it will have moved from a position of 0,-6771 to a position of 11,-6771. It will have been accelerated by Earth's gravity and thus the velocity will have changed from 11,0 to 11,0.0087.
We then work from them and go to the next step, and so on.
Doing this for an hour we end up at 22289, 9906, travelling at a velocity of 3.48, 4.89 or 6 km/s at an angle of 54.5 degrees.
After 2 hours we reach 32251, 26081 travelling at a velocity of 2.29, 4.17 or 4.75 km/s at an angle of 61 degrees.

After ~8.25 hours (arbitrary from how far down I copied the steps in excel), we get this:

If we compare it to something go directly away (but with the angle it ends on), we get this:

The one going directly away is further from the centre (128 vs 121 Gm), and going slower (3 vs 3.15 km/s).

As a comparison, this is what it looks like for an initial velocity of 8 km/s:


It isn't perfect due to the steps used, but it shows the difference quite well.

So, Jack what do you think
As shown with other questions I already know. If you are happy to accept my answer, then stop spouting the same BS.
It would enter a hyperbolic orbit and escape Earth's gravity well.

Beware, Super-Jack is pissed off!!!
No, I am just sick of you repeating the same lies again and again and refusing to even attempt to address the question.
These 2 simple questions destroy your positions.

Now care to try and honestly and rationally answer the questions, or just admit you have been lying and you know that rockets work in a vacuum and you don't need to go directly away (at least initially) to escape a gravity well.

What force is acting on the gas that is exiting the rocket to make it go in a particular direction and what is the other body involved in this interaction?

Please explain what you think would happen to an object going at 100 000 km/s in a direction perpendicular to directly away.
Do you think it will magically be held to Earth?
« Last Edit: August 12, 2019, 04:56:19 AM by JackBlack »

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rabinoz

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Re: HAPPY HOAX ANNIVERSARY!!! (Rockets can't fly in a vacuum)
« Reply #517 on: August 12, 2019, 05:19:01 AM »
Exhaust velocity of Ariana 5 rocket (at sea level) : 2749 m/s

So 2740-2740 = 0 m/s = 0 miles per HOUR
If the speed of dissipation (velocity of gas expansion in a vacuum) is equal or greater than exhaust velocity of a rocket, then thrust efficiency is ZERO.
So, I really can run faster than Ariana 5 rocket can fly in a Vacuum, since no rocket can fly in a vacuum, whatsoever!
There is no practical limit to how fast the exhaust as can move in a vacuum.
If you really know what you are saying, then you have to be able to expand on this a little bit.
Sure, happy to oblige ;). For a start the lower the mass of each particle of the exhaust stream the higher it's velocity can be.

Quote from: NASA Glenn Research Center
Ion Propulsion: Farther, Faster, Cheaper
Ion thrusters, the propulsion of choice for science fiction writers have become the propulsion of choice for scientists and engineers at NASA. The ion propulsion system's efficient use of fuel and electrical power enable modern spacecraft to travel farther, faster and cheaper than any other propulsion technology currently available. Chemical rockets have demonstrated fuel efficiencies up to 35 percent, but ion thrusters have demonstrated fuel efficiencies over 90 percent. Currently, ion thrusters are used to keep communication satellites in the proper position relative to Earth and for the main propulsion on deep space probes. Several thrusters can be used on a spacecraft, but they are often used just one at a time. Spacecraft powered by these thrusters can reach speeds up to 90,000 meters per second (over 200,000 mph). In comparison, the Space Shuttles can reach speeds around 18,000 mph.

The trade-off for the high top speeds of ion thrusters is low thrust (or low acceleration). Current ion thrusters can provide only 0.5 newtons (or 0.1 pounds) of thrust, which is equivalent to the force you would feel by holding 10 U.S. quarters in your hand. These thrusters must be used in a vacuum to operate at the available power levels, and they cannot be used to put spacecraft in space because large amounts of thrust are needed to escape Earth's gravity and atmosphere.
Now according to the rocket thrust equation, , the thrust per unit mass of propellant ie almost propertional to the exhaust velocity.
Hence ion thrusters can achieve far more efficient use of the limited propellant mass.

Even now, ion thrusters are used in some geostationary satellites for station keeping.
For example:
Quote
The first satellite powered entirely by ion engines is online.
Getting a satellite into orbit is only the first step in making it a useful piece of equipment. It also needs to arrive in the correct orbit and stay there, known as station-keeping. In the past this was accomplished with chemical propulsion, but more modern satellites have relied upon a mix of chemical and electric propulsion. Now Boeing has announced the first all-electric ion propulsion satellite is fully operational.

The satellite in question doesn’t have a snappy name — it’s a communications satellite called ABS-3A 702SP. It was launched last March aboard a SpaceX Falcon 9 rocket. It has just recently been handed over to its owner, Bermuda-based telecommunications company ABS. Because ABS-3A is a communications satellite, it needs to remain in a geosynchronous orbit. Thus, station-keeping is essential. When it can no longer maintain its orbit, it will cease being useful. Ion thrusters make a lot of sense in this scenario.
And that's just the start.

Quote from: cikljamas
It other words the gasses do instantly disperse into the "infinite vacuum".
That exhaust gas has been sent far from the Ariana 5 by the and the Ariana 5 is long gone.
Only in your wild imagination which is obviously too wild for grasping very simple concepts so not that you can't see the wood for the trees, you actually can't see the tree for the wood! (In croatian we use both versions in everyday speech, and it seems to me that in english there is only one version of this proverb)..
Sorry, but it's not my "wild imagination" but current reality.
So please explain these "simple concepts" that I "actually can't see the tree for the wood!" I'm all ears.

Quote from: cikljamas
Quote
The escape velocity from Earth is about 11.186 km/s NOT your 8km/s but the orbital velocity at 200 km is 7784 m/s - close to your figure.

But to even get into a 200 km orbit from the ground a rocket must overcome gravity and air-resistance till it leaves the atmosphere.
Without more details that cannot be calculated but to get to LEO requires approximately the equivalent of an extra 2.6 km/s velocity.

So we'll see if your rocket might even get to LEO.

So here you want to achieve a of 7784 + 2600 = 10,384 m/s.
Quote
Yes, but 7784 m/s is the orbital velocity at 200 km, however contrary to known rocket's trajectories, they need to end up going 7 miles per second away from the center of gravity (center of gravity = center of the earth)! So, alleged orbital velocity (even if it were real phenomena, and i doubt it, since i know that the earth is stationary) would still be of no use due to the wrong direction of motion, which is perpendicular wrt needed/demanding direction (away from the center of gravity)!!!

The escape velocity does not have to be directly away from centre of the earth. It can and usually is a tangential velocity.
And "Note that a powered object may escape the gravity of a body at any velocity desired."
Read again,
It is independent of the object mass direction of movement."
Yes, a lot of contradictions, i can write a book 1000 pages thick by quoting contradictory claims of today's scientists.
Would you care to make a bigger fool of yourself by list some of these so-called contradictions the I and "today's scientists" have made?
This should be fun! You go ahead and "write a book 1000 pages thick by quoting" your inability to understand the "claims of today's scientists".

Quote from: cikljamas
For example : they claim that directional gyro is rigid in space, and then they claim that directional gyro drifts 15 degrees per hour even if an airplane doesn't move at all (on a runway) while waiting permission to take off... Only they can't explain how they can use such an instrument for that (directional-compass) purpose (in the first place) if it drifts 15 degrees per hour even when an airplane is at rest.
Nothing contradictory there as you would learn if you bothered to read the instructions to pilots.
That would tell you that it must be reset from the magnetic compass every few minutes to cancel the drift!

Read: PILOTFRIEND, FIXED WING FLIGHT TRAINING: direction/heading indicator. Though I doubt you ability to understand a word of it.

Quote from: cikljamas
It means that you have to take into consideration "directional gyro problem," that is to say : If directional gyro maintains rigidity in space, then you have to explain to us : how come that we can't simply direct our gyro towards the sun (or even better - towards some fixed star) so that we can observe rotational motion of the earth.
There is no  "directional gyro problem" other thst in your imagination! But:
  • If the gyroscope in an aircraft gyro-compass were sufficiently stable it could do show the rotation of the earth.
    But modern laser-ring gyros as used in modern aircraft inertial guidance systems are sufficiently stable.

    And poor old high profile flat earther, Bob Knodell, accidently proves earth’s rotation with $ 20k gyro.

    That’s kind of a problem, right?


  • They are not sufficiently stable to maintain a heading for a long period and that, in addition to the earth's rotation, is why they must be reset against the magnetic compass.

I'll let JackBlack worry about the rest.

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Tom Bishop

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Re: HAPPY HOAX ANNIVERSARY!!! (Rockets can't fly in a vacuum)
« Reply #518 on: August 12, 2019, 05:19:33 AM »
It says right in the notes section that it's the distance from the body center of mass.
Yes, it says that in the box for calculating the speed and in the notes as "from its current distance from the body center of mass" but read the rest of the notes.
Quote
The "escape velocity" of an unpowered object with respect to a massive body is the speed that the object needs to be traveling at in order to escape the gravitational field of the body from its current distance from the body center of mass.

It is independent of the object mass or direction of movement (and therefore is not truly a 'velocity' at all).
The "current distance from the body center of mass" is only needed to calculate the speed necessary.

It is "independent of the . . . direction of movement" and the diagram "(note: direction not matter)"


How could it be stated more explicitly?

Escape Velocity is taught in high school. It's in relation from the center of mass. I would suggest educating yourself on this matter by looking for several definitions online.

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rabinoz

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Re: HAPPY HOAX ANNIVERSARY!!! (Rockets can't fly in a vacuum)
« Reply #519 on: August 12, 2019, 06:04:55 AM »
It says right in the notes section that it's the distance from the body center of mass.
Yes, it says that in the box for calculating the speed and in the notes as "from its current distance from the body center of mass" but read the rest of the notes.
Quote
The "escape velocity" of an unpowered object with respect to a massive body is the speed that the object needs to be traveling at in order to escape the gravitational field of the body from its current distance from the body center of mass.

It is independent of the object mass or direction of movement (and therefore is not truly a 'velocity' at all).
The "current distance from the body center of mass" is only needed to calculate the speed necessary.

It is "independent of the . . . direction of movement" and the diagram "(note: direction not matter)"


How could it be stated more explicitly?

Escape Velocity is taught in high school. It's in relation from the center of mass. I would suggest educating yourself on this matter by looking for several definitions online.
I wouldn't know, nor care greatly, how it's taught in school. I'm more concerned with how things work in practice.

And spacecraft heading for almost any mission, be it to a geostationary orbit, the moon, other planets or further, are placed in a near circular low earth orbit first and then accelerated tangentially.

Do you have contrary evidence?

Every reference I can find seems consistent with this:
Quote
Why does escape velocity not depend on the angle of projection?
Escape velocity does not depend on the angle of projection because it is not a vector. Itis an expression of the relationship between kinetic energy and potential energy — theseare not vectors. It's just like how it takes the same amount of work to climb to a certain height no matter what path you take.
That is just one answer. There are a number of longer ones.

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cikljamas

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Re: HAPPY HOAX ANNIVERSARY!!! (Rockets can't fly in a vacuum)
« Reply #520 on: August 12, 2019, 06:42:00 AM »
@Super-Jack

So, after 8 hours or so, you finally end up going directly away from the center of the earth??? lol

THE PROBLEM No 1 : What kind of a rocket can provide enough thrust, so that it can fly for 8,25 hours continually, pushing itself off of their own ejected gasses? After liftoff, it takes about 10 minutes before the main rocket stages burn out (depends on the rocket used). After that, the spacecraft is in zero G. The trip from the surface to low Earth orbit is a matter of about 10 minutes under thrust.

THE PROBLEM No 2 : As the rocket climbs ever higher, it will have to exponentially increase its output/thrust (and, of course, its fuel consumption), in order to keep going - and combating the pull of gravity which, contrary to public belief, does NOT decrease exponentially with altitude. Now, remember: NASA tells us that their rockets perform below max efficiency at sea level, at optimal efficiency somewhat higher in the atmosphere (as the rocket pressure equalizes with the external air pressure) and then start losing efficiency again as they ascend into ever thinner air. Note: NASA says so - not me.

THE PROBLEM No 3 : To attain the so-called escape velocity of 8km/s with "recoil power" only, this is what NASA's rockets would have to do: they'd have to shoot out from behind their rockets, all at once (like a bullet from a gun) a mass equal to the mass of the vessel itself - at a velocity of 8km/s. This means that, if this were to be the case (that rockets move due to "recoil action/reaction")- more than half of any rocket's fuel mass would have to be ejected at that speed.

Everything looks nice in NASA cartoons, however, NASA have been caught in lie(s) so many times it isn't even funny any more...

1. Neil De Grass Tyson explains that at the edge of an atmosphere you can see stars even with the sun in the sky, doesn't it mean that when the sun is not in the sky then the view of the stars is much more spectacular (the stars are much brighter) then here on the earth? Following this logic i suppose that in space you wouldn't even have to use long exposure technique in order to catch the stars while taking the photo of the night sky. ACCOMPANYING VIDEO :

According to Neil De Grass Tyson when you get at the edge of the atmosphere all of a sudden the view becomes totally spectacular. So, as i already pointed out : following his (Neil De Grass Tyson) logic stars wouldn't be just a little brighter, they would be much brighter.

Michael Collins contradicting himself : During famous Apollo 11 conference he claimed that he wasn't able to see *ANY* star from the lunar orbit...However in his book he claims that he was very able to observe countless stars from earth' orbit...How about that??? You see, this is an example where the same person asserts two totally contradictory claims (in two different occasions).

What could disable Michael Collins to see the stars from the lunar orbit? If there was anything that could obscure the stars while he was in lunar orbit, that very same reason (an obstacle) would disable him to see the stars TO EVEN A GREATER EXTENT while he was in earth's orbit since according to NeilDeGrass Tyson the only reason why we can't see the stars from the earth (during the day) is the presence of earth's atmosphere which is a glow with scattered light from the sun!!! If you take away the atmosphere, the sun will still be there but the sky goes dark! That is what folks get when they get to the edge of the atmosphere, the atmosphere is no longer between you and the rest of the universe and the stars would reveal themselves just as they would at night! Plain and simple!!!

2. YOU ONLY NEED TO PROVE ONE OF THEM TO BE THE SAME PERSON TO PROVE THE THEORY : LUNACY - PART 2 :

3. When the first crew who landed on the moon did a world tour ,they presented the Dutch premier with a piece of moon rock ,,,when he died a few years ago the university of Utrecht in Holland did some experiments on what they thought was moon rock ,,and it was found to be worthless petrified wood ,,?
http://www.telegraph.co.uk/news/science/space/6105902/Moon-rock-given-to-Holland-by-Neil-Armstrong-and-Buzz-Aldrin-is-fake.html

4. No tyre tracks from rover : Even guys who believe that we landed on the moon admit that there is huge amount of altered (photoshopped) "apollo" images.--- MOON FAKERY - 3 : http://www.marsanomalyresearch.com/evidence-reports/2010/192/moon-fakery-3.htm

5. Set of excerpts of "docking" : You must be a genuine idiot so to be unable to recognize obvious fakery in this cheap animation : once again : 100% proof moon landing Hoax in a 1 minute clip :

6. In 60 years of all of NASA or any other organizations outer space video footage... there does not exist a single video clip of someone panning the camera 360 degrees!!! HOW COME???

7.  Does anybody have a link to a rocket launch with rear facing cameras, where the rocket continues out into space eventually showing the whole globe????

8. How about live streaming of the earth by using camera mounted on a geostationary satellite?
---The alleged speed of a geostationary satellite is about 10 000 km/h (height = 37 000 km)
---The alleged speed of ISS is about 28 000 km/h (height = 400 km)

9. How high must one get before the atmospheric rotation does not exist? For if all rotates it must have to stop somewhere. I figure at mt Everest you have one third less air at top so wouldn't that mean at 100,000 feet, if mt Everest is at 28000 ft, no air or no atmosphere? So why not simple make airplanes outfitted for 110000 ft go up and then come down and let the earth spin underneath to arrive at ur destination. Well, how about numerous footages (countless of which are available on youtube) taken by cameras (attached to a baskets of a balloons that can go as high as 125 000 feet) in which we can clearly see perfectly still earth underneath??? U know why they don't, because it's all Bullshit???

Now, something very interesting regarding the point 9 :

Sagnac effect proves that the earth is stationary and that an aether rotates 24h/day around motionless earth.
However, aether's rotation is subtle, that is to say, we can detect that with interferometer kind of experiments (MMX, SAGNAC, MGP, ring-laser gyros, etc...), but aether's rotation doesn't produce such an effect which could be detected with directional gyros (heading indicators). However, if earth rotated heading indicators would indicate (detect) that motion. Not only that, your HC friends claim that mechanical heading indicators indeed detect earth's motion. But you as a pilot very well know that it is a blatant lie. They can claim whatever they want, but it doesn't matter what they claim, the only thing that matters is IS WHAT THEY CLAIM TRUE OR NOT, isn't that so??? Now, if earth rotated then mechanical heading indicators would detect earth's motion while we firmly stand on the rigid earth, and fly within earth's atmosphere, but that ability (of mechanical heading indicators) of detection of motion of the earth (and atmosphere) would come to a stop at higher altitudes (beyond earth's atmosphere). Where is (at what altitude) that boundary?

Now, even within geocentric scenario we would have the problem with that boundary, because unlike in HC scenario, within which going beyond that boundary means entering motionless space, within GC scenario, going beyond that boundary means entering *MECHANICALLY* (NOT AETHERLY) MOVING SPACE!!!

10. Within HC model geostationary satellites (at 37 000 km distance) are very far away from the last frontier of earth's atmosphere, and despite that their orbital speed is perfectly synchronized with the speed of earth's rotation. Isn't that too good to be true?

Within GC model geostationary satellites are again at 37 000 km distance and have to be motionless in the same way as the earth is motionless. I can show you how famous geocentrist Robert Sungenis explains the mechanics of that motionless geostationary satellites. He uses assumption of mechanical motion of space and then introduce roulette wheel and a ball example to illustrate how a ball (satellite) can stay fixed in space above certain point above the earth by the force of moving roulette wheel (rotating shell of the universe)...

I don't claim geostationary satellites don't exist for sure but since an explanation of Robert Sungenis is pretty odd, and since i know for sure that the earth is at rest (which means that HC explanation for geostationary satellites is 100 % fraudulent), then i still choose to remain suspicious about the very existence of geostationary satellites...

11. HAVE YOU EVER SEEN ANYTHING AS FAKE AS THIS :


@ Rabinoz, you are eager to see some contradictory statements? Let me show you just a few of them :

It is important to note that much of the resistance to what we call the Copernican Revolution derived from the fact that for some time it left many important questions unanswered - in particular, how the planets and stars moved and cohered without the celestial spheres. One central insight was the switch from Aristotles's belief in projectile motion, in which a moving object must be acted upon directly to keep moving, to the modern concept of INERTIA, in which a moving object keeps moving unless stopped by wind drag or something else.

 A related insight also contrary to Aristotle was Newton's MATHEMATICAL understanding of GRAVITY, which allowed bodies to act on one another from a distance without direct contact. In a letter to Dr. Bentley. Feb. 25th, 1692, Newton says ;— “ That gravitation should be innate and inherent in matter, so that one body can act upon another at a distance — is to me SO GREAT AN ABSURDITY, that I believe no man who has, in philosophical matters, a competent faculty of thinking, can ever fall into it .” Yet many have fallen into this “great absurdity.” Such men therefore—according to Newton — have not "a competent faculty of thinking” in philosophical matters. I am happy to be in agreement with Sir Isaac on this important point. Sir Robert Ball says: — “The law of gravitation ... underlies the whole of Astronomy.” (Story of the Heavens, p. 122). It does not speak very well for the Astronomy, if it is founded on an acknowledged “great absurdity.” According to Newton's way of thinking, besides the ordinary actions of physical laws, God acted by sustaining the motion of celestial spheres, and by setting up the initial orbits of the planets and later preventing them from disintegrating. Newton didn't hesitate to appeal to extraordinary acts of God to explain features of the natural world.

 Nevertheless, many of Newton's successors thought Newton was suggesting that God had to "correct" his own regular actions. They preferred instead the notion of God manifesting his powers not with irregular actions in nature but strictly by establishing regular "laws" that governed the entire cosmos.

Here is what Newton said in Proposition 43:

In order for the Earth to be at rest in the center of the system of the Sun, Planets, and Comets, there is required both universal gravity and another force in addition that acts on all bodies equally according to the quantity of matter in each of them and is equal and opposite to the accelerative gravity with which the Earth tends to the Sun... Since this force is equal and opposite to its gravity toward the Sun, the Earth can truly remain in equilibrium between these two forces and be at rest.  And thus celestial bodies can move around the Earth at rest,as in the Tychonic system.

"We have[...] certainty regarding the stability of the Earth, situated in the center, and the motion of the sun around the Earth." - Galileo Galilei in letter to Francesco Rinuccini, March 29th, 1641


Geocentricity detractors often appeal to the coriolis effect. It is, like the rest of the appeals, vain. The observations would be the same geocentrically or heliocentrically. Dr. Bouw covers it in detail in his books and explains how the coriolis *effect* becomes an actual coriolis *force* under a geocentric setup (and centrifugal force becomes centrifugal effect).

Here are some more quotes on the matter from some esteemed scientists:

The Coriolis effect arises, equally, whether the Earth rotates or the cosmos rotates. - Rick DeLano

"One need not view the existence of such centrifugal forces as originating from the motion of K [e.g.-the Earth]; one could just as well account for them as resulting from the average rotational effect of distant, detectable masses as evidenced in the vicinity of K, whereby K is treated as being at rest. - Albert Einstein, quoted in Hans Thirring, "On the Effect of Distant Rotating Masses in Einstein's Theory of Gravitation", Physikalische Zeitschrift 22, 29, 1921

"If one rotates the shell relative to the fixed stars about an axis going through its center, a Coriolis force arises in the interior of the shell, *that is, the plane of a Foucault pendulum is dragged around*" - Albert Einstein, cited in "Gravitation", Misner Thorne and Wheeler pp. 544-545.

"...Thus we may return to Ptolemy's point of view of a 'motionless earth'...One has to show that the transformed metric can be regarded as produced according to Einstein's field equations, by distant rotating masses. This has been done by Thirring. He calculated a field due to a rotating, hollow, thick-walled sphere and proved that inside the cavity it behaved as though there were centrifugal and other inertial forces usually attributed to absolute space. Thus from Einstein's point of view, Ptolemy and Corpenicus are equally right." - Max Born, "Einstein's Theory of Relativity", Dover Publications, 1962, pp 344 & 345

Why Don't More Scientists reject the heliocentric theory?

Some scientists admit the truth in their own words. Dutch physicist Hendrik Lorentz (of the Lorentz translation equations, foundation of the General Theory of Relativity) noted that:

"Briefly, everything occurs as if the Earth were at rest…"

His great contemporary Henri Poincare confessed:

"A great deal of research has been carried out concerning the influence of the Earth’s movement. The results were always negative..."

Lincoln Barnett agrees:

“No physical experiment ever proved that the Earth actually is in motion.”

And one of the chief participants in the experiment that bears his name (Albert A. Michelson), stunned by the results that went counter to his own heliocentric reflex:

“This conclusion directly contradicts the explanation… which presupposes that the Earth moves.”


Astronomer Sir Fred Hoyle says:

“Today we cannot say that the Copernican theory is “right” and the Ptolemaic theory is “wrong” in any meaningful sense (…) Science today is locked into paradigms. Every avenue is blocked by beliefs that are wrong, and if you try to get anything published in a journal today, you will run up against a paradigm, and the editors will turn you down.”

In further startling evidence that the scientific community is stifling dissenting views, Alexander von Humboldt admitted:

“I have known too, for a long time that we have no argument for the Copernican system, but I shall never dare to be the first to attack it. Don't rush into the wasps' nest. You will bring upon yourself the scorn of the thoughtless multitude… to come forth as the first against opinions, which the world has become fond of - I don't feel the courage.”

In other words, the notion that the earth revolves around the sun having become dogma, its denial spells automatic excommunication from the scientific establishment. As for the unthinking masses, a lie need only be systematized in textbooks to pass for truth.

The circumstances surrounding Hubble’s interpretation of the redshift are intriguing. Hubble worked with Milton Humason, but only Hubble’s name is associated with the redshift/expansion theory. The primary reason is that Humason was very reluctant to provide evidence for an expanding universe. The scientific community, based on Einstein’s reworked mathematical formulas (courtesy of de Sitter and Friedmann), had already decided that the universe was expanding, but they were missing observational evidence. Consequently, the science community was predisposed to interpret redshift as a Doppler phenomenon wherein galaxies are understood to be moving away at great speeds from the observer.2 This is in the face of the fact that there was no proof for a connection between receding galaxies and redshift, or that galaxies are receding at all, or that redshift is to be interpreted as a Doppler shift. In a paper published in 1931 Humason wrote:

It is not at all certain that the large redshifts observed in the spectra are to be interpreted as a Doppler effect but, for convenience, they are interpreted in terms of velocity and referred to as apparent velocities.

Interestingly enough, regardless of what the science establishment now associates exclusively with Edwin Hubble, the fact remains that even Hubble never fully committed himself to the now popular interpretation. Hubble was quite aware of what the science community desired, but maintained his distance. He writes:

This explanation interprets redshifts as Doppler effects, that is to say, as velocity‐shifts, indicating actual motion of recession. It may be stated with some confidence that redshifts are velocity‐shifts or else they represent some hitherto unrecognized principle  in  physics....  Meanwhile,  redshifts  may  be  expressed  on a scale of velocities as a matter of convenience. They behave as velocity‐shifts behave and they are very simply represented on the same familiar scale, regardless of the ultimate interpretation. The term “apparent velocity” may be used in carefully considered statements, and the adjective always implied where it is omitted in general usage.

As we have noted in our earlier discussion of Hubble, he then came to the place where he knew ሺconsidering what he actually saw in his telescopeሻ that there were only two options left to him. He writes:

Thus the use of dimming corrections leads to a particular kind of universe, but one which most students are likely to reject as highly improbable. Furthermore, the strange features of this universe are merely the dimming corrections expressed in different terms. Omit the dimming factors, and the oddities vanish. We are left with the simple, even familiar concept of a sensibly infinite universe. All the difficulties are transferred to the interpretation of redshifts which cannot then be the familiar velocity shifts....Meanwhile, on the basis of the evidence now available, apparent discrepancies between theory and observation must be recognized. A choice is presented, as once before in the days of Copernicus, between a strangely small, finite universe and a sensibly infinite universe plus a new principle of nature.[/color]
« Last Edit: August 12, 2019, 06:48:44 AM by cikljamas »
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markjo

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Re: HAPPY HOAX ANNIVERSARY!!! (Rockets can't fly in a vacuum)
« Reply #521 on: August 12, 2019, 07:08:49 AM »
So, after 8 hours or so, you finally end up going directly away from the center of the earth??? lol

THE PROBLEM No 1 : What kind of a rocket can provide enough thrust, so that it can fly for 8,25 hours continually, pushing itself off of their own ejected gasses? After liftoff, it takes about 10 minutes before the main rocket stages burn out (depends on the rocket used). After that, the spacecraft is in zero G. The trip from the surface to low Earth orbit is a matter of about 10 minutes under thrust.
Yes, and once in orbit the thrust is no longer required.  That's pretty much the whole point of going to orbit.

THE PROBLEM No 3 : To attain the so-called escape velocity of 8km/s with "recoil power" only, this is what NASA's rockets would have to do: they'd have to shoot out from behind their rockets, all at once (like a bullet from a gun) a mass equal to the mass of the vessel itself - at a velocity of 8km/s. This means that, if this were to be the case (that rockets move due to "recoil action/reaction")- more than half of any rocket's fuel mass would have to be ejected at that speed.
Actually, about 90% or so of a rocket's mass is propellant.  However, the exhaust velocity has very little to do with forward velocity of the rocket.  It has more to do with the efficiency of the thrust produced (A.K.A. specific impulse).

Seriously, you need to learn a lot more about how rockets work before you try to debunk them.
Science is what happens when preconception meets verification.
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Besides, perhaps FET is a conspiracy too.
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cikljamas

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Re: HAPPY HOAX ANNIVERSARY!!! (Rockets can't fly in a vacuum)
« Reply #522 on: August 12, 2019, 09:37:10 AM »
So, after 8 hours or so, you finally end up going directly away from the center of the earth??? lol

THE PROBLEM No 1 : What kind of a rocket can provide enough thrust, so that it can fly for 8,25 hours continually, pushing itself off of their own ejected gasses? After liftoff, it takes about 10 minutes before the main rocket stages burn out (depends on the rocket used). After that, the spacecraft is in zero G. The trip from the surface to low Earth orbit is a matter of about 10 minutes under thrust.
Yes, and once in orbit the thrust is no longer required.  That's pretty much the whole point of going to orbit.
It is no longer required? Really? So, then you are at loss of 3,5 km/s and you simply stay in Low earth's orbit, let alone that orbital speed itself is dubious concept having in mind everything that i wrote in the previous post.

THE PROBLEM No 3 : To attain the so-called escape velocity of 8km/s with "recoil power" only, this is what NASA's rockets would have to do: they'd have to shoot out from behind their rockets, all at once (like a bullet from a gun) a mass equal to the mass of the vessel itself - at a velocity of 8km/s. This means that, if this were to be the case (that rockets move due to "recoil action/reaction")- more than half of any rocket's fuel mass would have to be ejected at that speed.
Actually, about 90% or so of a rocket's mass is propellant.  However, the exhaust velocity has very little to do with forward velocity of the rocket.  It has more to do with the efficiency of the thrust produced (A.K.A. specific impulse).
So, according to your ludicrous logic, exhaust velocity has very little to do even with the efficiency of the thrust produced, since efficiency of thrust produced has everything to do with forward velocity of the rocket.

Exhaust velocity of Ariana 5 rocket (at sea level) : 2749 m/s

Look at the velocity of a real Arianne 5 rocket in this video:
https://www.youtube.co/watch?v=nMFotrkgF-w

So, exhaust velocity is greater than rocket speed, which is in favor of my argument!

Since you need additional 3,5 km/s (on top of orbital speed) to leave low earth orbit (going directly away from the center of the earth), you can't even count on 2749 m/s (exhaust velocity of Ariana 5), all you can count on is about 2,3 km/s at best...

However :

1. If the speed of dissipation (velocity of gas expansion in a vacuum) is equal or greater than exhaust velocity of a rocket, then thrust efficiency is ZERO.




THE PROBLEM No 2 : As the rocket climbs ever higher, it will have to exponentially increase its output/thrust (and, of course, its fuel consumption), in order to keep going - and combating the pull of gravity which, contrary to public belief, does NOT decrease exponentially with altitude. Now, remember: NASA tells us that their rockets perform below max efficiency at sea level, at optimal efficiency somewhat higher in the atmosphere (as the rocket pressure equalizes with the external air pressure) and then start losing efficiency again as they ascend into ever thinner air. Note: NASA says so - not me.

THE PROBLEM No 3 : To attain the so-called escape velocity of 11km/s with "recoil power" only, this is what NASA's rockets would have to do: they'd have to shoot out from behind their rockets, all at once (like a bullet from a gun) a mass equal to the mass of the vessel itself - at a velocity of 11km/s. This means that, if this were to be the case (that rockets move due to "recoil action/reaction")- more than half of any rocket's fuel mass would have to be ejected at that speed.

11. HAVE YOU EVER SEEN ANYTHING AS FAKE AS THIS :


The alleged moon landings are the only technological claim in the entire history of the world, such as the first automobile, airplane, or nuclear power, which was not far surpassed in capability 50 YEARS later, much less not even able to be duplicated by any nation on earth 50 YEARS later. The supposed moon landings are also the only time in history that such claimed expensive technology was deliberately destroyed afterwards (175 BILLION DOLLARS worth), only done so to hide the evidence of the fraud.

Seeing how it is IMPOSSIBLE for technology to go BACKWARDS and today NASA can only send astronauts ONE - THOUSANDTH the distance to the moon as was claimed 50 YEARS ago on the VERY FIRST attempt with 5 DECADES OLDER technology, the only remaining conclusion is that the 1969 claim was a federal government lie. It is that simple and that corrupt.
« Last Edit: August 12, 2019, 09:46:49 AM by cikljamas »
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markjo

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Re: HAPPY HOAX ANNIVERSARY!!! (Rockets can't fly in a vacuum)
« Reply #523 on: August 12, 2019, 11:34:26 AM »
THE PROBLEM No 3 : To attain the so-called escape velocity of 8km/s with "recoil power" only, this is what NASA's rockets would have to do: they'd have to shoot out from behind their rockets, all at once (like a bullet from a gun) a mass equal to the mass of the vessel itself - at a velocity of 8km/s. This means that, if this were to be the case (that rockets move due to "recoil action/reaction")- more than half of any rocket's fuel mass would have to be ejected at that speed.
Actually, about 90% or so of a rocket's mass is propellant.  However, the exhaust velocity has very little to do with forward velocity of the rocket.  It has more to do with the efficiency of the thrust produced (A.K.A. specific impulse).
So, according to your ludicrous logic, exhaust velocity has very little to do even with the efficiency of the thrust produced, since efficiency of thrust produced has everything to do with forward velocity of the rocket.
No, I didn't say any of that. 

Exhaust velocity of Ariana 5 rocket (at sea level) : 2749 m/s

Look at the velocity of a real Arianne 5 rocket in this video:
https://www.youtube.co/watch?v=nMFotrkgF-w

So, exhaust velocity is greater than rocket speed, which is in favor of my argument!
When the rocket is starting from zero, obviously the exhaust velocity is going to greater than the rocket speed.  That's shouldn't surprise anyone.

Since you need additional 3,5 km/s (on top of orbital speed) to leave low earth orbit (going directly away from the center of the earth), you can't even count on 2749 m/s (exhaust velocity of Ariana 5), all you can count on is about 2,3 km/s at best...
First of all, it's already been pointed out that escape velocity doesn't need to be directly away from the center of the earth.  Secondly, the first stage of the rocket won't be the stage that's propelling the payload out of orbit.

However :

1. If the speed of dissipation (velocity of gas expansion in a vacuum) is equal or greater than exhaust velocity of a rocket, then thrust efficiency is ZERO.
Incorrect.  The exhaust gasses do most of their work inside the combustion chamber and exhaust nozzle.  What the gasses do after they leave the nozzle is of little concern.
Science is what happens when preconception meets verification.
Quote from: Robosteve
Besides, perhaps FET is a conspiracy too.
Quote from: bullhorn
It is just the way it is, you understanding it doesn't concern me.

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JackBlack

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Re: HAPPY HOAX ANNIVERSARY!!! (Rockets can't fly in a vacuum)
« Reply #524 on: August 12, 2019, 01:53:40 PM »
Escape Velocity is taught in high school. It's in relation from the center of mass. I would suggest educating yourself on this matter by looking for several definitions online.
Good advice. You should follow it.
Yes, escape velocity is a function of distance to the centre of mass.
But the direction is not.
Do you understand the difference between distance and direction?
If not, I suggest you educate yourself on this very simple matter.

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JackBlack

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Re: HAPPY HOAX ANNIVERSARY!!! (Rockets can't fly in a vacuum)
« Reply #525 on: August 12, 2019, 02:04:32 PM »
So, after 8 hours or so, you finally end up going directly away from the center of the earth???
No, it still isn't going directly away.

THE PROBLEM No 1 : What kind of a rocket can provide enough thrust, so that it can fly for 8,25 hours continually, pushing itself off of their own ejected gasses?
You mean the irrelevant strawman you put up to pretend there is a problem?
No where did I rely upon a rocket continually firing for 8.5 hours.
Instead, I had the object initially going at 11 km/s, after which it was carried by its own inertia and acted upon by gravity.
No additional thrust was required.
That is because it already had all the energy it needed.

THE PROBLEM No 2 : As the rocket climbs ever higher, it will have to exponentially increase its output/thrust
You mean blatant lie.
You have provided absolutely no justification for the required increase in thrust.
You repeating the same lies wont make them true.

THE PROBLEM No 3 : To attain the so-called escape velocity of 8km/s with "recoil power" only, this is what NASA's rockets would have to do:
And another blatant lie.
Do you have anything to actually back up your pathetic claim, or is all you have lie after lie after lie?

You are yet to demonstrate any problem with how rockets work.

Stop just repeating the same BS and start dealing with the issues raised. Every time you avoid them and bring up the same refuted BS you just show everyone how little you care about the truth.
Until you can honestly and rationally deal with these issues you have nothing.

What force is acting on the gas that is exiting the rocket to make it go in a particular direction and what is the other body involved in this interaction?

Please explain what you think would happen to an object going at 100 000 km/s in a direction perpendicular to directly away.
Do you think it will magically be held to Earth?

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cikljamas

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Re: HAPPY HOAX ANNIVERSARY!!! (Rockets can't fly in a vacuum)
« Reply #526 on: August 12, 2019, 03:59:50 PM »
@ Jack, first of all, you have to get over the fact that we live in a geocentric universe :






An author of a text above is mr Wolfgang Smith. Smith graduated in 1948 from Cornell University with a B.A. in Philosophy, Physics and Mathematics. Two years later he obtained his M.S. in Physics from Purdue University and, some time later, a Ph.D. in Mathematics from Columbia University.

He worked as a physicist in Bell Aircraft corporation, researching aerodynamics and the problem of atmospheric reentry.[1] He was a mathematics professor at MIT, UCLA and Oregon State University, doing research in the field of differential geometry and publishing in academic journals such as the Transactions of the American Mathematical Society, the Proceedings of the National Academy of Sciences, the American Journal of Mathematics, and others. He retired from academic life in 1992.

In parallel with his academic duties, he developed and still develops philosophical inquiries in the fields of metaphysics and the philosophy of science, publishing in specialized journals such as The Thomist and Sophia: The Journal of Traditional Studies.

You can here mr Smith's elaboration on this extremely interesting topic in this video :

COPERNICAN PRINCIPLE DESTROYED - part 2 :


Secondly, you have to deal with the following issues :

9. How high must one get before the atmospheric rotation does not exist? For if all rotates it must have to stop somewhere. I figure at mt Everest you have one third less air at top so wouldn't that mean at 100,000 feet, if mt Everest is at 28000 ft, no air or no atmosphere? So why not simple make airplanes outfitted for 110000 ft go up and then come down and let the earth spin underneath to arrive at ur destination. Well, how about numerous footages (countless of which are available on youtube) taken by cameras (attached to a baskets of a balloons that can go as high as 125 000 feet) in which we can clearly see perfectly still earth underneath??? U know why they don't, because it's all Bullshit???

Now, something very interesting regarding the point 9 :

Sagnac effect proves that the earth is stationary and that an aether rotates 24h/day around motionless earth.
However, aether's rotation is subtle, that is to say, we can detect that with interferometer kind of experiments (MMX, SAGNAC, MGP, ring-laser gyros, etc...), but aether's rotation doesn't produce such an effect which could be detected with directional gyros (heading indicators). However, if earth rotated heading indicators would indicate (detect) that motion. Not only that, your HC friends claim that mechanical heading indicators indeed detect earth's motion. But you as a pilot very well know that it is a blatant lie. They can claim whatever they want, but it doesn't matter what they claim, the only thing that matters is IS WHAT THEY CLAIM TRUE OR NOT, isn't that so??? Now, if earth rotated then mechanical heading indicators would detect earth's motion while we firmly stand on the rigid earth, and fly within earth's atmosphere, but that ability (of mechanical heading indicators) of detection of motion of the earth (and atmosphere) would come to a stop at higher altitudes (beyond earth's atmosphere). Where is (at what altitude) that boundary?

Now, even within geocentric scenario we would have the problem with that boundary, because unlike in HC scenario, within which going beyond that boundary means entering motionless space, within GC scenario, going beyond that boundary means entering *MECHANICALLY* (NOT AETHERLY) MOVING SPACE!!!

10. Within HC model geostationary satellites (at 37 000 km distance) are very far away from the last frontier of earth's atmosphere, and despite that their orbital speed is perfectly synchronized with the speed of earth's rotation. Isn't that too good to be true?

Within GC model geostationary satellites are again at 37 000 km distance and have to be motionless in the same way as the earth is motionless. I can show you how famous geocentrist Robert Sungenis explains the mechanics of that motionless geostationary satellites. He uses assumption of mechanical motion of space and then introduce roulette wheel and a ball example to illustrate how a ball (satellite) can stay fixed in space above certain point above the earth by the force of moving roulette wheel (rotating shell of the universe)...

I don't claim geostationary satellites don't exist for sure but since an explanation of Robert Sungenis is pretty odd, and since i know for sure that the earth is at rest (which means that HC explanation for geostationary satellites is 100 % fraudulent), then i still choose to remain suspicious about the very existence of geostationary satellites...

11. HAVE YOU EVER SEEN ANYTHING AS FAKE AS THIS :


Thirdly, once you figure out how deep your rabbit hole really is, then (and only then) you will be able to think clearly...And when you start to think clearly your whole world (including "rockets can fly in a vacuum" myth) will crumble like a house of cards...
« Last Edit: August 12, 2019, 04:02:35 PM by cikljamas »
"I can't breathe" George Floyd RIP

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rabinoz

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Re: HAPPY HOAX ANNIVERSARY!!! (Rockets can't fly in a vacuum)
« Reply #527 on: August 12, 2019, 04:01:33 PM »
@Super-Jack

So, after 8 hours or so, you finally end up going directly away from the center of the earth??? lol
Not Super-Jack here just plain old RABinOZ to put you straight in case JackBlack is too busy doing real work.

Once again you have proven your complete inability to read and comprehend what was written.
Of course, you always have been one to try to deceive by using known "Photoshopped" photos so a little "inability to read" is understandable.

But JackBlack did not ever say "going directly away from the center of the earth"! Read it over-and-over-again until you can comprehend the simple words!
Yes, the distance.
This distance determines the velocity required.
Notice how nowhere does it say the velocity must be directed away from the centre of mass?
Notice how instead it says that direction does not matter (i.e. it is independent from the direction of movement)?

Quote from: cikljamas
THE PROBLEM No 1 : What kind of a rocket can provide enough thrust, so that it can fly for 8,25 hours continually, pushing itself off of their own ejected gasses? After liftoff, it takes about 10 minutes before the main rocket stages burn out (depends on the rocket used). After that, the spacecraft is in zero G. The trip from the surface to low Earth orbit is a matter of about 10 minutes under thrust.
Why would any such chemical high thrust rocket have to fly "for 8,25 hours continually, pushing itself off of their own ejected gasses?" That's a ridiculous question.

In a 200 km LEO the rocket is already travelling at 7.784 km/s and only needs to reach 11.016 km/sec (the escape velocity at 200 km).
That's an 3.232 km/sec extra so where do you get this "for 8,25 hours continually" from?
Orbital velocities are from Satsig Delta V calculator for LEO/MEO/GEO orbit injection and escape velocities are from: CalcTool Escape velocity calculated from mass and distance.

The effective ΔV to reach LEO would have been be about 10.384‬ km/sec so why would you suggest this "8,25 hours" to gain an extra ΔV 3.401 km/sec.
(An expert in "orbital mechanics" might like to check my figures.}

Quote from: cikljamas
THE PROBLEM No 2 : As the rocket climbs ever higher, it will have to exponentially increase its output/thrust (and, of course, its fuel consumption), in order to keep going - and combating the pull of gravity
No, it would NOT! Once achieving escape velocity no extra thrust is needed! That is from the definition of escape velocity.

Quote from: cikljamas
which, contrary to public belief, does NOT decrease exponentially with altitude.
I doubt that the public believes that gravity "decreases exponentially with altitude".
Gravity decreases as the inverse square of the distance from the centre of the earth as in Newton's Law of Universal Gravitation:
Quote from: cikljamas
Now, remember: NASA tells us that their rockets perform below max efficiency at sea level, at optimal efficiency somewhat higher in the atmosphere (as the rocket pressure equalizes with the external air pressure) and then start losing efficiency again as they ascend into ever thinner air. Note: NASA says so - not me.
As I've asked before, "Are you totally incapable of learning!" We've been over this numerous times!
A rocket engine might be a little below maximum efficiency in a vacuum but its thrust in a vacuum will always be greater than at sea-level.
Then an engine designed for use in a vacuum has much more thrust than a comparable engine for use at sea-level.
The second and third stages of rockets invariably use vacuum engines.
Read this post again: Flat Earth General / Re: HAPPY HOAX ANNIVERSARY!!! (Rockets can't fly in a vacuum) « on: August 11, 2019, 08:28:53 AM »
For example, each SpaceX Merlin 1 D atmospheric engine has a thrust of 654 kN at sea-level and 716 kN in a vacuum but the Merlin 1 D vacuum engine has a thrust of 934 kN (only in a vacuum).

Quote from: cikljamas
THE PROBLEM No 3 : To attain the so-called escape velocity of 8km/s with "recoil power" only, this is what NASA's rockets would have to do: they'd have to shoot out from behind their rockets, all at once (like a bullet from a gun) a mass equal to the mass of the vessel itself - at a velocity of 8km/s. This means that, if this were to be the case (that rockets move due to "recoil action/reaction")- more than half of any rocket's fuel mass would have to be ejected at that speed.
Where did you dig that up from? Rockets do "move due to 'recoil action/reaction' " but do not expel all their fuel at once. A machine gun does not expel its full load all at once either!
  • Escape velocity is NOT 8km/s but about 11.2 km/sec from the earth's surface.

  • That value of escape velocity only applies to an object leaving from the earth's surface. From a LEO of 200 km the escape velocity is 11.014 km/sec and progressively lower at higher altitudes.
    And a powered object, say using an ion thruster, can escape from LEO using a low thrust for a long time and this is a practical alternative to the fast flight using chemical rockets.
So it would seem that your PROBLEMs No 1-3 do not exist other than in your imagination!

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rabinoz

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Re: HAPPY HOAX ANNIVERSARY!!! (Rockets can't fly in a vacuum)
« Reply #528 on: August 12, 2019, 06:24:46 PM »
@ Jack, first of all, you have to get over the fact that we live in a geocentric universe :
Can I have a go too, as long as JackBlack does not mind?

Firstly, no we do not "have to get over the fact that we live in a geocentric universe" because we don't!

Quote from: cikljamas
10. Within HC model geostationary satellites (at 37 000 km distance) are very far away from the last frontier of earth's atmosphere, and despite that their orbital speed is perfectly synchronized with the speed of earth's rotation. Isn't that too good to be true?

Within GC model geostationary satellites are again at 37 000 km distance and have to be motionless in the same way as the earth is motionless. I can show you how famous geocentrist Robert Sungenis explains the mechanics of that motionless geostationary satellites. He uses assumption of mechanical motion of space and then introduce roulette wheel and a ball example to illustrate how a ball (satellite) can stay fixed in space above certain point above the earth by the force of moving roulette wheel (rotating shell of the universe)...
You mean that "famous geocentrist Robert Sungenis"
who doesn't have any real qualifications in physics and understands very little? Robert Sungenis: Incompetent in Physics
The one who must use an "assumption of mechanical motion of space"? The “Simple” and “Scary” Mindset of Robert Sungenis
That one?

Quote from: cikljamas
I don't claim geostationary satellites don't exist for sure but since an explanation of Robert Sungenis is pretty odd, and since i know for sure that the earth is at rest (which means that HC explanation for geostationary satellites is 100 % fraudulent), then i still choose to remain suspicious about the very existence of geostationary satellites...
Yes, I agree that the "explanation of Robert Sungenis is pretty odd", very odd in fact!
And his explanation of things like "stellar aberration" is also very odd! Geocentrism and Stellar Aberration: Illuminating the Earth’s Motion
But I also find your claim that you "know for sure that the earth is at rest" very odd:  Geocentrism? Seriously?

Quote from: cikljamas
11.HAVE YOU EVER SEEN ANYTHING AS FAKE AS THIS:

I've seen many things much more fake than that - in other words, what is wrong with it?
The video is taken from the ISS orbiting about 400 km above the earth at about 27,600 km/h so, of course, the earth seems to be flying underneath it.
At roughly 27,600 km/h give or take a few hundred km/hr.

Please explain your problem in your own words!!

Quote from: cikljamas
Thirdly, once you figure out how deep your rabbit hole really is, then (and only then) you will be able to think clearly...And when you start to think clearly your whole world (including "rockets can fly in a vacuum" myth) will crumble like a house of cards...
Sorry, Mr Cikljamas, but I see no "rabbit hole" other than the one you are rapidly digging yourself into.
So it's you who need to "figure out how deep your rabbit hole really is, then (and only then) you will be able to think clearly".
But I don't hold out much hope as those living on that left-hand peak of the Dunning-Kruger Syndrome graph can never "think clearly".
They need to slide down into the "Valley of Despair" before gradually climbing that "Slope of Enlightenment" The Dunning-Kruger effect in innovation.
“Real knowledge is to know the extent of one’s ignorance.”Confucius

I do believe that we've shown quite conclusively that "rockets can fly in a vacuum" so it's no "myth".

There is no Thirdly because there never was any valid First or Second.

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JackBlack

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Re: HAPPY HOAX ANNIVERSARY!!! (Rockets can't fly in a vacuum)
« Reply #529 on: August 13, 2019, 01:51:43 AM »
@ Jack, first of all, you have to get over the fact that we live in a geocentric universe :
No, I don't need to get over your fake facts.
Spouting more and more lies while going off on a tangent wont help you.
You have already brought up loads of failed arguments to try and support GC and had them all refuted.
This thread is discussing rockets, not GC.
If you want to discuss more failed arguments for GC feel free to start a new thread or go back to an existing one.

You need to deal with the questions I have raised if you want any hope of defending your claims.
Otherwise, the questions leave your claims completely destroyed.

Again:
What force is acting on the gas that is exiting the rocket to make it go in a particular direction and what is the other body involved in this interaction?

Please explain what you think would happen to an object going at 100 000 km/s in a direction perpendicular to directly away.
Do you think it will magically be held to Earth?

Until you can address these, you have nothing.

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Macarios

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Re: HAPPY HOAX ANNIVERSARY!!! (Rockets can't fly in a vacuum)
« Reply #530 on: August 13, 2019, 07:28:09 AM »
Geocentrism and Flat are not the same.
Geocentric model puts spherical Earth to the center.

Flat model - (abandoned as obsolete around 600 B.C.)
Earth is flat, at the bottom, water is around it, dome is above, stars are fireflies on it.
(Some fiction literature from Middle Age depicts them as little holes in the "dome velvet".)

Geocentric model - (from 600 B.C., obsolete since 1600 A.D.; Biblical model)
Earth is a ball in the center of heavens, everything on it tends to that center compressing into sphere.
Several concentric crystal spheres around the earth carry own set of celestial bodies each.
First 26 spheres were hypothesized, then 33, then more.
Describes star navigation, astronomy and astrology better than the Flat model.

Heliocentric model - (in use since 1600 A.D.)
Earth is a planet as any other planet in the Solar system, revolves around Sun, spins, and Moon revolves arond it.
Describes and predicts astronomical events more accurate and with much less calculations than Geocentrism.
Allowed Space exploration and orbits utilization.
« Last Edit: August 13, 2019, 07:29:53 AM by Macarios »
I don't have to fight about anything.
These things are not about me.
When one points facts out, they speak for themselves.
The main goal in all that is simplicity.

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cikljamas

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Re: HAPPY HOAX ANNIVERSARY!!! (Rockets can't fly in a vacuum)
« Reply #531 on: August 13, 2019, 11:07:51 AM »
Macarios, feel free to answer these few easy questions :

The earth and the atmosphere are both spinning at the same rate (according to the heliocentric model) with high speeds at the equator and lesser speeds towards the poles.

To skim the Earth’s atmosphere in orbit, your spacecraft has to travel at least as fast as 7.8 km/s, or about 17,500 mph. The Earth itself, with its atmosphere, is spinning eastward below you, at around 1,000 mph. So, you can reduce your re-entry speed by orbiting in the same direction that the Earth spins. However, that only helps a bit. Your spacecraft still has to travel at 16,500 mph relative to our atmosphere to stay in orbit.

1. How ISS gained (and maintains) it's incredible orbital velocity (7,66 km/s = 27 600 km/h)???

2. How Space Shuttle gained it's incredible orbital velocity (7,66 km/s)??? 

3. Where does the space shuttle reenters earth’s atmosphere and is the space shuttle following the spin of the earth? If not wouldn’t it be impossible to reenter the earth due to the fact that the atmosphere would hit the shuttle with the strength of a tornado that blows 26 000 km/h (which would be the difference between Space Shuttle's orbital velocity and rotational velocity of earth's atmosphere?



So, Space Shuttle had to sustained strength of a hurricane which blows 85 times faster than the fastest winds ever recorded on earth?

--- Wiki quote : "This is the reason why satellites fall out of orbit. Hundreds of miles up, it is to all intents and purposes a hard vacuum, but there are still enough air molecules to generate drag on a satellite, slowing it down until it plunges into the lower layers and burns up. But how far out does the atmosphere actually go?"

5. In a hard vacuum, there are still enough air molecules to generate drag on a satellite??? In a hard vacuum???
"I can't breathe" George Floyd RIP

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Stash

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Re: HAPPY HOAX ANNIVERSARY!!! (Rockets can't fly in a vacuum)
« Reply #532 on: August 13, 2019, 12:21:49 PM »
Macarios, feel free to answer these few easy questions :

The earth and the atmosphere are both spinning at the same rate (according to the heliocentric model) with high speeds at the equator and lesser speeds towards the poles.

To skim the Earth’s atmosphere in orbit, your spacecraft has to travel at least as fast as 7.8 km/s, or about 17,500 mph. The Earth itself, with its atmosphere, is spinning eastward below you, at around 1,000 mph. So, you can reduce your re-entry speed by orbiting in the same direction that the Earth spins. However, that only helps a bit. Your spacecraft still has to travel at 16,500 mph relative to our atmosphere to stay in orbit.

1. How ISS gained (and maintains) it's incredible orbital velocity (7,66 km/s = 27 600 km/h)???

2. How Space Shuttle gained it's incredible orbital velocity (7,66 km/s)??? 

3. Where does the space shuttle reenters earth’s atmosphere and is the space shuttle following the spin of the earth? If not wouldn’t it be impossible to reenter the earth due to the fact that the atmosphere would hit the shuttle with the strength of a tornado that blows 26 000 km/h (which would be the difference between Space Shuttle's orbital velocity and rotational velocity of earth's atmosphere?



So, Space Shuttle had to sustained strength of a hurricane which blows 85 times faster than the fastest winds ever recorded on earth?

--- Wiki quote : "This is the reason why satellites fall out of orbit. Hundreds of miles up, it is to all intents and purposes a hard vacuum, but there are still enough air molecules to generate drag on a satellite, slowing it down until it plunges into the lower layers and burns up. But how far out does the atmosphere actually go?"

5. In a hard vacuum, there are still enough air molecules to generate drag on a satellite??? In a hard vacuum???

1) How does the International Space Station maintain its orbit?

"Robert Frost, Instructor and Flight Controller at NASA
Answered Jul 23, 2013 · Author has 7.3k answers and 149m answer views
Translational burns are thruster firings done by modules at the rear of the International Space Station (ISS), such as the Progress, ATV (pictured below), or if necessary the Service Module, itself.  In the past, the Space Shuttle Orbiter was also used to provide translational burns."



There’s a lot more info here:

https://www.quora.com/How-does-the-International-Space-Station-maintain-its-orbit-and-what-propellant-does-it-use

2) How Space Shuttle gained it's incredible orbital velocity (7,66 km/s)

Roughly the same way as the ISS, I suppose. Though it wasn’t in orbit for very long in comparison, obviously.

3) You make it seem like the Shuttle just simply vertically pierced through into the atmosphere like an arrow. Like kicking in the door to the atmosphere from space. It’s called reentry. The shuttle came in hot, figuratively and literally, starting reentry at about 17k mph. Then it does all the reentry stuff it needs to do slow down:

"The Shuttle flies at a high angle of attack during re-entry to generate drag to dissipate speed. It executes hypersonic "S-turn" maneuvers to kill off speed during re-entry. The lift of the wings is only important in the final flare maneuver at touchdown."

5) From the original article where you got that wiki quote:

"The thing is, when one moves into the realm of outer space, it's often less about where one thing ends and another begins and more where one set of forces ceases to dominate over the other. Case in point is the Earth's atmosphere. Being made up of gas, it tends to expand to fill whatever space its in, and space is one great, big infinite void. The Earth's gravity keeps most of the air around our planet where it should be, but the outer layers of the atmosphere don't stop so much as peter out."

https://newatlas.com/earth-atmosphere-geocorona-soho/58565/
« Last Edit: August 13, 2019, 12:32:27 PM by Stash »

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JackBlack

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Re: HAPPY HOAX ANNIVERSARY!!! (Rockets can't fly in a vacuum)
« Reply #533 on: August 13, 2019, 02:29:06 PM »
Macarios, feel free to answer these few easy questions :
They have already been addressed in threads were that was the topic.

Again, the topic of this thread is your baseless, refuted claim that rockets can't fly in a vacuum.

Now care to answer the simple question:
What force is acting on the gas that is exiting the rocket to make it go in a particular direction and what is the other body involved in this interaction?

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rabinoz

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Re: HAPPY HOAX ANNIVERSARY!!! (Rockets can't fly in a vacuum)
« Reply #534 on: August 13, 2019, 03:49:30 PM »
Macarios, feel free to answer these few easy questions :
I'm not as smart as Macarios but even I might answer trivia like this stuff ;D.

Quote from: cikljamas
The earth and the atmosphere are both spinning at the same rate (according to the heliocentric model) with high speeds at the equator and lesser speeds towards the poles.

To skim the Earth’s atmosphere in orbit, your spacecraft has to travel at least as fast as 7.8 km/s, or about 17,500 mph. The Earth itself, with its atmosphere, is spinning eastward below you, at around 1,000 mph. So, you can reduce your re-entry speed by orbiting in the same direction that the Earth spins. However, that only helps a bit. Your spacecraft still has to travel at 16,500 mph relative to our atmosphere to stay in orbit.
1,000 mph is hardly a "high speed" in this context but it helps. So, what's the problem?

Quote from: cikljamas
1. How ISS gained (and maintains) it's incredible orbital velocity (7,66 km/s = 27 600 km/h)???
Rockets. The first part was launched by a "left-over" Saturn V. If the Saturn V were started in space, away from earth, it could reach a speed of about 18 km/sec or 64,500 km/h.

Quote from: cikljamas
2. How Space Shuttle gained it's incredible orbital velocity (7,66 km/s)??? 
Rockets engines.
The Space Shuttle was assisted by two solid fuelled boosters and the main engine was fuelled from the huge external fuel tank.
The nozzle of the main engine of the Space Shuttle was profiled so that it could perform efficiently from sea-level to vacuum condidtions.

Quote from: cikljamas
3. Where does the space shuttle reenters earth’s atmosphere and is the space shuttle following the spin of the earth? If not wouldn’t it be impossible to reenter the earth due to the fact that the atmosphere would hit the shuttle with the strength of a tornado that blows 26 000 km/h (which would be the difference between Space Shuttle's orbital velocity and rotational velocity of earth's atmosphere?
<< Irrelevant >>HURRICANE-SPEEDS
So, Space Shuttle had to sustained strength of a hurricane which blows 85 times faster than the fastest winds ever recorded on earth?
Yes. That's why Rocket Science is hard and not for kiddies like you. But, since you seem to get your information from Wikipedia you might read:
       Wikipedia, Atmospheric entry
       Wikipedia, Atmospheric Reentry Demonstrator
       Wikipedia, Space Shuttle thermal protection system
Or you might have got it from the voluminous material freely available from "the horse's mouth", as it were, your friendly NASA ;). Here's a tit-bit:
       Orbiter Thermal Protection System

Quote from: cikljamas
--- Wiki quote : "This is the reason why satellites fall out of orbit. Hundreds of miles up, it is to all intents and purposes a hard vacuum, but there are still enough air molecules to generate drag on a satellite, slowing it down until it plunges into the lower layers and burns up.
But how far out does the atmosphere actually go?"
Very far out ;D! Read a bit about it in: Rocket & Space Technology: ATMOSPHERIC MODELS.
Here's all the detail you need to work it out for yourself for up to 2000 km above the earth: STANDARD AND REFERENCE ATMOSPHERES.
At 200 km and 500 K the density would be about 8.13 x 10-11 kg/m3 and that's enough to bring satellites down in a fairly short time.
At 2000 km and 1600 K, however, the density would be about 1.08 x 10-15 kg/m3 and that's low enough for satellites to have a very long life.
The lifetime depends on the mass and fontal area but here are a few rough values:
Satellite Altitude   Lifetime

     400 km                1 year
     500 km              10 years
     700 km            100 years
     900 km          1000 years

Quote from: cikljamas
5. In a hard vacuum, there are still enough air molecules to generate drag on a satellite??? In a hard vacuum???
It might be classed as a hard vacuum by the standards of the vacuum qualities generated on earth but even a thousand km up "there are still enough air molecules to generate drag on a satellite".

?

turtles

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Re: HAPPY HOAX ANNIVERSARY!!! (Rockets can't fly in a vacuum)
« Reply #535 on: August 13, 2019, 04:35:59 PM »
@Super-Jack

So, after 8 hours or so, you finally end up going directly away from the center of the earth??? lol

THE PROBLEM No 1 : What kind of a rocket can provide enough thrust, so that it can fly for 8,25 hours continually, pushing itself off of their own ejected gasses? After liftoff, it takes about 10 minutes before the main rocket stages burn out (depends on the rocket used). After that, the spacecraft is in zero G. The trip from the surface to low Earth orbit is a matter of about 10 minutes under thrust.

A rocket with a low thrust engine, say an ion drive.

Quote
THE PROBLEM No 2 : As the rocket climbs ever higher, it will have to exponentially increase its output/thrust (and, of course, its fuel consumption), in order to keep going

wait, in part 1 above you said it's in zero-G...why does it need to exponentially increase its output/thrust to accelerate further while in zero-G?

Quote
- and combating the pull of gravity which, contrary to public belief, does NOT decrease exponentially with altitude.

Why do you think that? Show your working.

Quote
Now, remember: NASA tells us that their rockets perform below max efficiency at sea level, at optimal efficiency somewhat higher in the atmosphere (as the rocket pressure equalizes with the external air pressure) and then start losing efficiency again as they ascend into ever thinner air. Note: NASA says so - not me.

Yes....a rocket designed to launch from the surface, through an atmosphere and into LEO...lots of different environments for one configuration to be good in. Of course, once you're in space you can have an engine thats good at running in a vacumn.

Quote
THE PROBLEM No 3 : To attain the so-called escape velocity of 8km/s with "recoil power" only, this is what NASA's rockets would have to do: they'd have to shoot out from behind their rockets, all at once (like a bullet from a gun) a mass equal to the mass of the vessel itself - at a velocity of 8km/s. This means that, if this were to be the case (that rockets move due to "recoil action/reaction")- more than half of any rocket's fuel mass would have to be ejected at that speed.

If you threw away a mass the same as the rockets mass at 8km/s the rocket will have an equal and opposite reaction and move the other direction at 8km/s. There, problem solved.

Quote
Everything looks nice in NASA cartoons, however, NASA have been caught in lie(s) so many times it isn't even funny any more...

I dunno, it's still funny every time a flat earther gets caught in a lie. I'm l laughing now.

Quote
1. Neil De Grass Tyson explains that at the edge of an atmosphere you can see stars even with the sun in the sky, doesn't it mean that when the sun is not in the sky then the view of the stars is much more spectacular (the stars are much brighter) then here on the earth? Following this logic i suppose that in space you wouldn't even have to use long exposure technique in order to catch the stars while taking the photo of the night sky. ACCOMPANYING VIDEO :

According to Neil De Grass Tyson when you get at the edge of the atmosphere all of a sudden the view becomes totally spectacular. So, as i already pointed out : following his (Neil De Grass Tyson) logic stars wouldn't be just a little brighter, they would be much brighter.

Michael Collins contradicting himself : During famous Apollo 11 conference he claimed that he wasn't able to see *ANY* star from the lunar orbit...However in his book he claims that he was very able to observe countless stars from earth' orbit...How about that??? You see, this is an example where the same person asserts two totally contradictory claims (in two different occasions).

What could disable Michael Collins to see the stars from the lunar orbit? If there was anything that could obscure the stars while he was in lunar orbit, that very same reason (an obstacle) would disable him to see the stars TO EVEN A GREATER EXTENT while he was in earth's orbit since according to NeilDeGrass Tyson the only reason why we can't see the stars from the earth (during the day) is the presence of earth's atmosphere which is a glow with scattered light from the sun!!! If you take away the atmosphere, the sun will still be there but the sky goes dark! That is what folks get when they get to the edge of the atmosphere, the atmosphere is no longer between you and the rest of the universe and the stars would reveal themselves just as they would at night! Plain and simple!!!

You can't see the stars in the day from the ground cos the sky is bright. So having something bright in your field of view means you can't see the stars. Something like, the Earth, or the Moon, or the lights inside the spacecraft. If you take the time to get your eyes dark adjusted then you'll see stars.

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2. YOU ONLY NEED TO PROVE ONE OF THEM TO BE THE SAME PERSON TO PROVE THE THEORY : LUNACY - PART 2 :

3. When the first crew who landed on the moon did a world tour ,they presented the Dutch premier with a piece of moon rock ,,,when he died a few years ago the university of Utrecht in Holland did some experiments on what they thought was moon rock ,,and it was found to be worthless petrified wood ,,?
http://www.telegraph.co.uk/news/science/space/6105902/Moon-rock-given-to-Holland-by-Neil-Armstrong-and-Buzz-Aldrin-is-fake.html

World conspiracy involving millions of people or....someone stole the real moon rock and sold it to a collecter.

Quote
4. No tyre tracks from rover : Even guys who believe that we landed on the moon admit that there is huge amount of altered (photoshopped) "apollo" images.--- MOON FAKERY - 3 : http://www.marsanomalyresearch.com/evidence-reports/2010/192/moon-fakery-3.htm

Even that article shows the tyre tracks, whats the problem. So on some surfaces they aren't so obvious, oh dear. We've even seen the tyre tracks recently from satellites orbiting the moon.

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Says

5. Set of excerpts of "docking" : You must be a genuine idiot so to be unable to recognize obvious fakery in this cheap animation : once again : 100% proof moon landing Hoax in a 1 minute clip :

Whats wrong with the docking footage? Looks fine to me. Trouble is, people are too used to the rubbish physics in Star Trek/Wars/etc. How do you expect it to move?

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6. In 60 years of all of NASA or any other organizations outer space video footage... there does not exist a single video clip of someone panning the camera 360 degrees!!! HOW COME???

This is a problem for you? Quite rare to see someone do that on Earth as well.

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7.  Does anybody have a link to a rocket launch with rear facing cameras, where the rocket continues out into space eventually showing the whole globe????

That's gonna go great until the first stage with the camera gets ejected...

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8. How about live streaming of the earth by using camera mounted on a geostationary satellite?
---The alleged speed of a geostationary satellite is about 10 000 km/h (height = 37 000 km)
---The alleged speed of ISS is about 28 000 km/h (height = 400 km)

I suppose no one who launches a geostationary can be bothered to put a camera on it along with the associated costs just to satisfy someone who doesn't believe in satellites.

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9. How high must one get before the atmospheric rotation does not exist? For if all rotates it must have to stop somewhere. I figure at mt Everest you have one third less air at top so wouldn't that mean at 100,000 feet, if mt Everest is at 28000 ft, no air or no atmosphere? So why not simple make airplanes outfitted for 110000 ft go up and then come down and let the earth spin underneath to arrive at ur destination. Well, how about numerous footages (countless of which are available on youtube) taken by cameras (attached to a baskets of a balloons that can go as high as 125 000 feet) in which we can clearly see perfectly still earth underneath??? U know why they don't, because it's all Bullshit???

I don't even get this....you think the top of the atmosphere is stationary with regard to the Earths spin? Why would you think that?

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Now, something very interesting regarding the point 9 :

Sagnac effect proves that the earth is stationary and that an aether rotates 24h/day around motionless earth.
However, aether's rotation is subtle, that is to say, we can detect that with interferometer kind of experiments (MMX, SAGNAC, MGP, ring-laser gyros, etc...), but aether's rotation doesn't produce such an effect which could be detected with directional gyros (heading indicators). However, if earth rotated heading indicators would indicate (detect) that motion. Not only that, your HC friends claim that mechanical heading indicators indeed detect earth's motion. But you as a pilot very well know that it is a blatant lie. They can claim whatever they want, but it doesn't matter what they claim, the only thing that matters is IS WHAT THEY CLAIM TRUE OR NOT, isn't that so??? Now, if earth rotated then mechanical heading indicators would detect earth's motion while we firmly stand on the rigid earth, and fly within earth's atmosphere, but that ability (of mechanical heading indicators) of detection of motion of the earth (and atmosphere) would come to a stop at higher altitudes (beyond earth's atmosphere). Where is (at what altitude) that boundary?

Now, even within geocentric scenario we would have the problem with that boundary, because unlike in HC scenario, within which going beyond that boundary means entering motionless space, within GC scenario, going beyond that boundary means entering *MECHANICALLY* (NOT AETHERLY) MOVING SPACE!!!

Aether? Oh dear, nurse!

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10. Within HC model geostationary satellites (at 37 000 km distance) are very far away from the last frontier of earth's atmosphere, and despite that their orbital speed is perfectly synchronized with the speed of earth's rotation. Isn't that too good to be true?

Well it's got to be true at some altitude, why not 37,000km?

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Within GC model geostationary satellites are again at 37 000 km distance and have to be motionless in the same way as the earth is motionless. I can show you how famous geocentrist Robert Sungenis explains the mechanics of that motionless geostationary satellites. He uses assumption of mechanical motion of space and then introduce roulette wheel and a ball example to illustrate how a ball (satellite) can stay fixed in space above certain point above the earth by the force of moving roulette wheel (rotating shell of the universe)...

I don't claim geostationary satellites don't exist for sure but since an explanation of Robert Sungenis is pretty odd, and since i know for sure that the earth is at rest (which means that HC explanation for geostationary satellites is 100 % fraudulent), then i still choose to remain suspicious about the very existence of geostationary satellites...

How do you know for sure? I'm not entirely sure I want to know why you think you know...

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11. HAVE YOU EVER SEEN ANYTHING AS FAKE AS THIS :


Looks fine to me. How do you think it should look? You're obviously an expert on how things should look

Ah, that's enough, lifes too short ;)
The Universal Accelerator is a constant farce.

Flattery will get you nowhere.

From the FAQ - "In general, we at the Flat Earth Society do not lend much credibility to photographic evidence."

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rabinoz

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Re: HAPPY HOAX ANNIVERSARY!!! (Rockets can't fly in a vacuum)
« Reply #536 on: August 13, 2019, 05:53:41 PM »
3. When the first crew who landed on the moon did a world tour, they presented the Dutch premier with a piece of moon rock ,,,when he died a few years ago the university of Utrecht in Holland did some experiments on what they thought was moon rock ,,and it was found to be worthless petrified wood ,,?
http://www.telegraph.co.uk/news/science/space/6105902/Moon-rock-given-to-Holland-by-Neil-Armstrong-and-Buzz-Aldrin-is-fake.html
No, they didn't "present the Dutch premier with a piece of moon rock".
Quote from: MOON HOAX: DEBUNKED: DEBUNKING DOUBTERS AND LUNATICS, CELEBRATING COURAGE AND INGENUITY
9.8 How come the Moon rock donated to Holland is fake?
IN A NUTSHELL: Because it’s not a NASA Moon rock. Everything points to a mistake or to a hoax orchestrated by two Dutch artists in 2006. NASA has never authenticated the “rock” (there are no documents tracing its origins), it’s far too big to be a donated lunar sample, and its background story is nonsensical. It was reportedly donated privately in 1969 to a retired prime minister instead of being given, as was customary, to a representative of the then-current Dutch government; it wasn’t put on public display as a Moon rock would have deserved; and real donated Moon rocks were encapsulated in transparent plastic, while this one is not.

THE DETAILS:* In August 2009, several media outlets began reporting that the curators of the Dutch national museum in Amsterdam, the Rijksmuseum, had discovered that an exhibit that had been presented for years as an Apollo 11 Moon rock was actually a chunk of petrified wood (Figure 9.8-1).

* I am indebted to Diego Cuoghi for sharing his research into many of the details of this story.

 Figure 9.8-1. The fake “Moon rock” and its descriptive card.
. . . . . . . . .
Van Gelder also noted that the history of the item was suspicious. Real samples would be donated by the US government to the people of a country through a representative of the then-current government, not to a former prime minister who in 1969 had been out of office for eleven years. The US ambassador explained that he had received the exhibit from the US State Department, but he could not recall the details of the matter.

In addition to its inconsistent and implausible history, the fakery, if intended, wasn’t particularly subtle. The reddish color of the item was completely different from the usual color of lunar samples. Petrologist Wim van Westrenen, of the Amsterdam Free University, reported that he was immediately aware that something was wrong. Spectroscopic and microscopic inspection of a fragment taken from the item found quartz and cell-like structures typical of petrified wood.

Further anomalies become evident if the item is compared with a real sample donated to the Netherlands and stored at the Boerhaave museum (Figure 9.8-2).

Figure 9.8-2. At the top, encapsulated in clear plastic, a genuine sample of Moon rock
donated to the Netherlands by the US. Credit: Museumboerhaave.nl.

The real Dutch sample is encapsulated in plastic and accompanied by a national flag and by plaques that clearly identify it as fragments of Moon rocks retrieved by Apollo 11 and “presented to the people of the Kingdom of the Netherlands by Richard Nixon, President of the United States of America”. Specifically, the plaque states that “this flag of your nation was carried to the Moon and back by Apollo 11, and this fragment of the Moon’s surface was brought to Earth by the crew of that first manned lunar landing.”
<< Read the rest at the link >>
Nowhere does it does not state that the fake rock was a "moon-rock" and anyone could tell at a glance that it wasn't a moon-rock.

Please investigate the source of your lies before you spread them further.
But I guess you'll just keep doing it along with the "Photoshopped" "fotos" you use - it's just the sort of person you've turned out to be.

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rabinoz

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Re: HAPPY HOAX ANNIVERSARY!!! (Rockets can't fly in a vacuum)
« Reply #537 on: August 13, 2019, 06:09:17 PM »
Looks fine to me. How do you think it should look? You're obviously an expert on how things should look

Ah, that's enough, lifes too short ;)
There's a lot of anti-MOON HOAX material in MOON HOAX: DEBUNKED! DEBUNKING DOUBTERS AND LUNATICS.
It has sections on:
     Chapter 3. The best evidence of the Moon landings
     Chapter 4. Moon hoax beliefs and believers
     Chapter 5. Alleged photographic anomalies
     Chapter 6. Alleged video and film anomalies
     Chapter 7. Alleged technological anomalies
     Chapter 8. Alleged physical anomalies
     Chapter 9. Other alleged anomalies
It seems to have answers for most things that dutchy and cikljamas throw up.

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cikljamas

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Re: HAPPY HOAX ANNIVERSARY!!! (Rockets can't fly in a vacuum)
« Reply #538 on: August 14, 2019, 03:10:08 AM »
Flat earth society overcrowded with rocket scientists, professional NASA shills, and astronomers supporting each other, and noone to support my geocentric view...Doesn't it strike you as odd (to say the least)???

So, i've got a message for all Flat Earthers, here (and there) :


Gas pressure requires molecules to be in contact with each other, bouncing off each other, causing millions of collisions per second, etc… If you release gas into the vacuum of space, the first molecule that pops out will shoot off into the distance at a constant speed, so will the one behind that, never catching up with the first one. The third, fourth, etc… all fly off into the distance trying to fill the vacuum by finding their empty corner. So no matter how much gas you produce none of it will ever change the pressure under a space ship. None of it if will ever push a spaceship. To push a spaceship there must be some locally high pressure under it, which is impossible since the pressure in space is 0 everywhere.

Back the the Nozzle and the Massflow equation F=MA on earth
Think about a fire hose shooting water. A force comes directly back against the column of water shooting out. Why? Because the first drop of water has to pas through air, which is dense, causing many collisions, slowing down the drop of water. The second drop, directly behind the first, will not be slowed down by the air so it will collide with the first drop, the third drop hits the second drop and so on, the fast water coming through the hose pushing through the slower water outside causes Newton’s 3rd Law to push back on the column of water. This is why you need people holding the hose to add an unbalanced force otherwise the hose would not be able to push water through that column anymore, the water column would be diverted and the hose would flop around. It is obvious that one drop of water does not push back on the hose, you need a fast moving column.

The nozzle and the Massflow equation in space
Since the molecules leaving the combustion chamber and entering the vacuum never slow down, never collide with any outside objects, nor with each other, their force is always moving forward, away from the ship. There is no way for that force to be returned to the ship. There is no way for the force of the moving molecules to be extracted and used for propulsion. Their force is carried off into the far corners of space. This is also known as Joule Expansion. Remember that as soon as the nozzle is opened, the combustion chamber becomes part of the vacuum of space as is subject to its laws. A closed chamber is under pressure but not an open one.

NASA is lying at the molecular level
But that’s OK because most people don’t usually look there. The awesome, spectacular and heroic nature of space exploration is enough to cloud the most logical minds. Most respectable engineering schools won’t touch space flight and those who do have tiny departments. If it was really a multi-billion dollar government funded operation, every school in America would have their hands out for government grants like the do with Engineering, Computer Science and Biology. But why train thousands of the best minds of a generation in a field that doesn’t exist?

So, once again, just for you Jack :

Newton's Third Law - Identifying Action and Reaction Force Pairs

A force is a push or a pull that acts upon an object as a results of its interaction with another object. Forces result from interactions!

"When one body exerts a force on a second body, the second body simultaneously exerts a force equal in magnitude and opposite in direction on the first body."

”When a BODY exerts force on a SECOND  BODY” let me ask you, what is the second body being acted upon, IN A VACUUM ??!!
« Last Edit: August 14, 2019, 03:20:13 AM by cikljamas »
"I can't breathe" George Floyd RIP

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cikljamas

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Re: HAPPY HOAX ANNIVERSARY!!! (Rockets can't fly in a vacuum)
« Reply #539 on: August 14, 2019, 03:17:39 AM »
At 21min 53 sec in this video, a microphone accidentally records an astronaut privately discussing telephoning the CIA to have investigative journalist Bart Sibrel assassinated, something that would not be necessary if Sibrel's discovery of the fraud was not true.





All Truth passes through three stages.
First, it is ridiculed,
Then it is violently opposed,
Finally it is accepted as self-evident.
-Arthur Schopenhauer-

In an age of universal deceit,
telling the Truth is a revolutionary act.
Whoever controls the past, controls the future.
-George Orwell-

One of the saddest lessons of history is this:
If we’ve been bamboozled long enough,
we tend to reject any evidence of the bamboozle.
We’re no longer interested in finding out the Truth.
The bamboozle has captured us.
It’s simply too painful to acknowledge,
even to ourselves,
that we’ve been taken.
Once you give a charlatan power over you,
you almost never get it back.
-Carl Sagan-

It is easier to fool people,
than to convince them that they have been fooled.
-Mark Twain-
"I can't breathe" George Floyd RIP