SpaceX Will Fly a Rocket Back to Earth in Broad Daylight This Weekend

In the meantime here is a good visualisation of the CRS-10 flight profile

So now we have shown you a error in your so called calculations let's move on to the next.

 Do you use densified lox in your equations or standard lox?

LOL - so I provide links to my calculations and you do not show any errors there at all. You seem to live in Fantasy land like Mr. No El Ksum.

I use the units kilograms,  seconds and Newton in my equations.

To travel in 3D space you must apply forces (Newton) in the right directions at the right locations, times and durations. To create the forces you need fuel and I am sorry to inform that you get too heavy to carry them along up in space. It is called rocket science. It seems you don't know anything about it.

Do you use LOX or densified LOX in your equations. You make no mention of the version you use. I am asking you.

As for the error we have shown you were not taking into account that the rocket was not carrying it's maximum payload so had fuel left over to use for the landing. Not requiring more as you continue to assert it does with no evidence to back the incorrect claim up.

Do you use LOX or densified LOX in your equations. You make no mention of the version you use. I am asking you.

As for the error we have shown you were not taking into account that the rocket was not carrying it's maximum payload so had fuel left over to use for the landing. Not requiring more as you continue to assert it does with no evidence to back the incorrect claim up.

I use kg/s of fuel consumption in my equations. Whatever fuel left over for landing, it must be converted to force (N) and then applied to the rocket for landing. Pls provide your ideas what forces (N) were applied when and where when the rocket was dropping down from space to enable a soft landing.

Have you ever dropped anything from space? Do you know about gravity? You can find out in your kitchen! Just drop anything on the floor there. Tell me what happens.

Why not just watch any number of the videos that show you the descent of the first stage?

Why not just watch any number of the videos that show you the descent of the first stage?

Because there are no numbers to watch. There isn't even a clock! How can you navigate in space ... without a clock?

Or have you studied http://heiwaco.com/moontravelw1.htm#F9 ? Just copy/paste what you do not understand.

I look forward to explain everything to you.

This:

If anything freefalls from 180 000 m altitude, ignoring air friction, it will reach 50.000 m altitude at 1 598 m/s hypersonic speed after 163 seconds (or only 157 seconds in the alternative trajectory - it goes faster than gravity can accelerate it!!). Imagine that. It will hit ground after another 30 seconds.

What happens to the booster in free fall if you don't ignore air friction (along with a reentry burn and a landing burn)?

Quote from: Heiwa on February 22, 2017, 07:54:24 AM

Or have you studied http://heiwaco.com/moontravelw1.htm#F9 ? Just copy/paste what you do not understand.

I look forward to explain everything to you.

This:

Quote from: your site

If anything freefalls from 180 000 m altitude, ignoring air friction, it will reach 50.000 m altitude at 1 598 m/s hypersonic speed after 163 seconds (or only 157 seconds in the alternative trajectory - it goes faster than gravity can accelerate it!!). Imagine that. It will hit ground after another 30 seconds.

What happens to the booster in free fall if you don't ignore air friction (along with a reentry burn and a landing burn)?

Source - http://heiwaco.com/moontravelw1.htm#OT

Thanks for asking. As you know - as a typical example - the first booster stage goes to ~70 000 m altitude under own nine (!) engines at full power (where it separates from the second stage at T 2.25 after lift-off) and is then catapulted up into space at 180 000 m altitude at T 5.25.
Some rocket engines are then fired to push the boster back towards above the start point - the boost back burn. The booster is 85 000 m downrange from landing.

Then the booster stage drops down - free fall! From space! 180 000 m altitude! It has vertical,downward speed ~1 600 m/s at 50 000 m altitude which, is reduced by an entry burn! If not it will crash after 30 seconds.
There is no air friction above 50 000 m altitude as there is no air there (I hope you agree). The booster is dropping down from 180 000 m altitude and, at 50 000 m altitude, the entry burn must be done at T 8.02 to reduce vertical, free fall hypersonic speed. To do so, the booster must be absolutely vertical to avoid flying backwards away from landing zone. During the entry burn the booster rocket however continues downwards/backwards at hypersonic speed. Imagine landing like that!
After the entry burn, the booster continues to drop, speed increases again again due to gravity. Air friction will reduce the increase in speed, but then at T 8.40 a rocket engine fires a landing burn ... the empty rocket stops at T 9.22 ... where it started! No fuel is left. A perfect landing!
I estimate 50-70 tons of fuel are used to produce the forces to boost back, at entry and landing. I cannot understand how it can be done at the right times/locations/durations/directions while travelling backwards at hypersonic space. IMO the rocket is not not stable going backwards, so it will wobble out of course and ... miss the target and ... crash.
So the whole thing is a hoax. 

Do you know the difference between LOX and densified LOX?

Do you know the difference between LOX and densified LOX?

Yes! Why do you ask?

Okay good. So which one do you use I your equations.

A perfect landing!
I estimate 50-70 tons of fuel are used to produce the forces to boost back, at entry and landing. I cannot understand how it can be done at the right times/locations/durations/directions while travelling backwards at hypersonic space. IMO the rocket is not not stable going backwards, so it will wobble out of course and ... miss the target and ... crash.
So the whole thing is a hoax.

What a conceited know-it-all!

I believe I said exactly this in and easier post!
You "cannot understand how it can be done at the right times/locations/durations/directions" "So the whole thing is a hoax."

Of course the "the rocket is not stable going backwards" and most modern rockets are statically unstable even when travelling forward.
As far as I know all large rockets are unstable without dynamic stability control, usually using  a gimbaled thrust system.

Flying backwards the Space-X first stage has much poorer stability The grid-fins not only improve static stability, but can be controlled to provide dynamic control.
They had plenty of failures during development, right up to quite recently.

You cannot understand how "a gravitational slingshot" works, how reentry from orbit works and now how landings by Space-X work, so you claim that all are hoaxes!

I would claim that it is you that is the fake!

Then the booster stage drops down - free fall! From space! 180 000 m altitude! It has vertical,downward speed ~1 600 m/s at 50 000 m altitude which, is reduced by an entry burn! If not it will crash after 30 seconds.
There is no air friction above 50 000 m altitude as there is no air there (I hope you agree).

No, I don't agree.  I would agree that there is very little air at 50 km, but to say that there is no air at 50 km would not be true.

I cannot understand how it can be done at the right times/locations/durations/directions while travelling backwards at hypersonic space.

Have you ever considered the possibility that all of that is being done by people smarter than you?

IMO the rocket is not not stable going backwards, so it will wobble out of course and ... miss the target and ... crash.

That's why they use nitrogen gas thrusters, grid fins and gimballed rocket engines to actively stabilize the flight.

So the whole thing is a hoax.

I don't understand how your easter egg oil tanker can be safer than double hull oil tankers, so your design must be a hoax.

A list of a few if the many videos taken by the general public posted on reddit By A User.

https://www.reddit.com/r/spacex/comments/5uoy8o/rspacex_crs10_launch_media_thread_videos_images/

By

A list of a few if the many videos taken by the general public posted on reddit By A User.

https://www.reddit.com/r/spacex/comments/5uoy8o/rspacex_crs10_launch_media_thread_videos_images/

Amazing what rubbish the general public can put together from far away. They all miss the NASA helicopter!

The NASA helicopter?

Yes, I prefer of the landing taken close up from the NASA helicopter.

Note how the thing is dropping down - rocket engines doing their landing burn - and how the landing legs are pushed out into position at the last moment and ... 10 seconds later ... perfect touch down. It is a pity the helicopter only records the last 20 seconds of the landing ... or what you can call it.

Imagine what fakery you can do with CGI today!

" class="bbc_link" target="_blank" rel="noopener noreferrer">

Do you use LOX or densified LOX in your equations?

Quote from: Pythagoras on February 23, 2017, 05:39:22 AM

A list of a few if the many videos taken by the general public posted on reddit By A User.

https://www.reddit.com/r/spacex/comments/5uoy8o/rspacex_crs10_launch_media_thread_videos_images/

Amazing what rubbish the general public can put together. They all miss the helicopter!

The helicopter?

Yes, I prefer taken from the NASA helicopter.

Note how the thing is dropping down - rocket engines doing their landing burn - and how the landing legs are pushed out into position at the last moment and ... 10 seconds later ... perfect touch down. It is a pity the helicopter only records the last 20 seconds of the landing ... or what you can call it.

Imagine what fakery you can do with CGI today!

" class="bbc_link" target="_blank" rel="noopener noreferrer">

Oh NASA is the general public now?

Are you avoiding my question heiwa?

Do you use LOX or densified LOX in your equations?

Pls visit my website - LOX + kerosene ejected at 4000 m/s - 77 tons thrust. Only one engine blasting away.

Imagine applying 77 tons force on a little rocket with mass 25 tons dropping free fall from 10000 or 50000 m altitude. What a stupid joke.

Can you find any rocket scientist anywhere that can explain it?

Why didn't you fly in the helicopter?

What about the balance sheets?

Quote from: Pythagoras on February 23, 2017, 05:39:22 AM

A list of a few if the many videos taken by the general public posted on reddit By A User.

https://www.reddit.com/r/spacex/comments/5uoy8o/rspacex_crs10_launch_media_thread_videos_images/

Amazing what rubbish the general public can put together from far away.

Why don't you spend some of that 5 million euro prize money that you have sitting around take a nice vacation in Florida and catch a launch for yourself?

So you use LOX and not densified LOX in you equation? Why?

BTW, the kerosene is densified too.

So you use LOX and not densified LOX in you equation? Why?

Mr. No El K$um asked me. Don't you know him? He his selling tickets to planet Mars departure 2024 or so. Very strange guy, though.

Why don't you spend some of that 5 million euro prize money that you have sitting around take a nice vacation in Florida and catch a launch for yourself?

Haven't you heard about the POTUS latest visa restrictions?

Quote from: Pythagoras on February 23, 2017, 06:39:41 AM

So you use LOX and not densified LOX in you equation? Why?

Mr. No El K$um asked me. Don't you know him? He his selling tickets to planet Mars departure 2024 or so. Very strange guy, though.

Is that what you consider a answer to my question?

Quote from: markjo on February 23, 2017, 06:39:07 AM

Why don't you spend some of that 5 million euro prize money that you have sitting around take a nice vacation in Florida and catch a launch for yourself?

Haven't you heard about the POTUS latest visa restrictions?

As long as you aren't from a radical Muslim terrorist country you shouldn't have any problem getting a tourist visa.

Quote from: Heiwa on February 23, 2017, 06:47:46 AM

Quote from: markjo on February 23, 2017, 06:39:07 AM

Why don't you spend some of that 5 million euro prize money that you have sitting around take a nice vacation in Florida and catch a launch for yourself?

Haven't you heard about the POTUS latest visa restrictions?

As long as you aren't from a radical Muslim terrorist country you shouldn't have any problem getting a tourist visa.

Yes, that's what I heard.

Quote from: Pythagoras on February 23, 2017, 05:39:22 AM

A list of a few if the many videos taken by the general public posted on reddit By A User.

https://www.reddit.com/r/spacex/comments/5uoy8o/rspacex_crs10_launch_media_thread_videos_images/

Amazing what rubbish the general public can put together from far away. They all miss the NASA helicopter!

The NASA helicopter?

Yes, I prefer of the landing taken close up from the NASA helicopter.

Note how the thing is dropping down - rocket engines doing their landing burn - and how the landing legs are pushed out into position at the last moment and ... 10 seconds later ... perfect touch down. It is a pity the helicopter only records the last 20 seconds of the landing ... or what you can call it.

Imagine what fakery you can do with CGI today!

" class="bbc_link" target="_blank" rel="noopener noreferrer">

It's 2017. The video was from a drone.

As for it being cgi, stop being dumb.

Quote from: Pythagoras on February 23, 2017, 06:18:27 AM

Do you use LOX or densified LOX in your equations?

Pls visit my website - LOX + kerosene ejected at 4000 m/s - 77 tons thrust. Only one engine blasting away.

Only one engine you say?

http://www.spacex.com/falcon9

http://www.spacex.com/sites/spacex/files/falcon_9_users_guide_rev_2.0.pdf

Quote from: markjo on February 23, 2017, 06:58:33 AM

Quote from: Heiwa on February 23, 2017, 06:47:46 AM

Quote from: markjo on February 23, 2017, 06:39:07 AM

Why don't you spend some of that 5 million euro prize money that you have sitting around take a nice vacation in Florida and catch a launch for yourself?

Haven't you heard about the POTUS latest visa restrictions?

As long as you aren't from a radical Muslim terrorist country you shouldn't have any problem getting a tourist visa.

Yes, that's what I heard.

Well, they've scheduled a bunch of launches for the rest of the year, so you shouldn't have too much trouble working one into your vacation schedule.
https://www.reddit.com/r/spacex/wiki/launches/manifest