Planes

Anyone been in a plane and looked out the window recently

Anyone been in a plane and looked out the window recently

Well using 7917 as the Earth's diameter, so 3959 as the radius, we must have for the height H the relation

R/(R+H) = cosine of 5 degrees

and so H = R * (secant 5 degrees - 1)

and so H = 15 miles = 80,000 feet

Since the human eye would still have some issues perceiving a five degree change, I doubt anyone sees Earth curvature below a height of around 80,000 feet. Whatever someone seeing out of a commercial plane is not curvature.

Quote from: Iamtheantichrist2 on December 07, 2012, 10:41:24 AM

Anyone been in a plane and looked out the window recently

Quote

Well using 7917 as the Earth's diameter, so 3959 as the radius, we must have for the height H the relation

R/(R+H) = cosine of 5 degrees

and so H = R * (secant 5 degrees - 1)

and so H = 15 miles = 80,000 feet

Since the human eye would still have some issues perceiving a five degree change, I doubt anyone sees Earth curvature below a height of around 80,000 feet. Whatever someone seeing out of a commercial plane is not curvature.

So.. are you an expert on Human Anatomy? How would you know that the human eye would have issues perceiving a 5 degree change?

Oh and don't bother linking me to a source for that, because for all we know, it was edited by a fool or it was all photoshopped.

Quote from: Iamtheantichrist2 on December 07, 2012, 10:41:24 AM

Anyone been in a plane and looked out the window recently

Quote

Well using 7917 as the Earth's diameter, so 3959 as the radius, we must have for the height H the relation

R/(R+H) = cosine of 5 degrees

and so H = R * (secant 5 degrees - 1)

and so H = 15 miles = 80,000 feet

Since the human eye would still have some issues perceiving a five degree change, I doubt anyone sees Earth curvature below a height of around 80,000 feet. Whatever someone seeing out of a commercial plane is not curvature.

  What is the significance of the 5 degree value?

I looked out of an airplane window quite recently. The earth looked wonderfully flat.

I looked out of an airplane window quite recently. The earth looked wonderfully flat.

You must have a visual impairment, because if you look towards the horizon, there's a slight curve.

Oh wait no, that's a conspiracy too.

Quote from: Beorn on December 07, 2012, 12:11:34 PM

I looked out of an airplane window quite recently. The earth looked wonderfully flat.

You must have a visual impairment, because if you look towards the horizon, there's a slight curve.

Oh wait no, that's a conspiracy too.

  are you ever going to post something worthwhile?

Quote from: PiemanFiddy on December 07, 2012, 12:12:22 PM

Quote from: Beorn on December 07, 2012, 12:11:34 PM

I looked out of an airplane window quite recently. The earth looked wonderfully flat.

You must have a visual impairment, because if you look towards the horizon, there's a slight curve.

Oh wait no, that's a conspiracy too.

  are you ever going to post something worthwhile?

Sure, as soon as you post things that make sense.

So.. are you an expert on Human Anatomy?

Well... yeah, actually. Not an "expert" on optometry specifically, but certainly enough to know the optical perception ability of the average human.

How would you know that the human eye would have issues perceiving a 5 degree change?

A five degree change is the average perceptible value, and that is usually when one is presented with multiple degree variations. To be honest, five degrees is really pushing it.

Oh and don't bother linking me to a source for that, because for all we know, it was edited by a fool or it was all photoshopped.

Then I suppose you'll just have to take my word for it.

Quote from: PiemanFiddy on December 07, 2012, 11:12:09 AM

So.. are you an expert on Human Anatomy?

Well... yeah, actually. Not an "expert" on optometry specifically, but certainly enough to know the optical perception ability of the average human.

Quote from: PiemanFiddy on December 07, 2012, 11:12:09 AM

How would you know that the human eye would have issues perceiving a 5 degree change?

A five degree change is the average perceptible value, and that is usually when one is presented with multiple degree variations. To be honest, five degrees is really pushing it.

Quote from: PiemanFiddy on December 07, 2012, 11:12:09 AM

Oh and don't bother linking me to a source for that, because for all we know, it was edited by a fool or it was all photoshopped.

Then I suppose you'll just have to take my word for it.

Umm... ok


Take your word for it? Well, why should I? I could tell you I have a relative who lives in Antarctica who is willing to disprove your silly theory, but that wouldn't get me anywhere would it?

No it wouldn't, and here's why: 

Because you don't want to hear the truth.
(and for the record, I actually do have a relative that lives in antarctica as a field researcher.)

Umm... ok


Take your word for it? Well, why should I? I could tell you I have a relative who lives in Antarctica who is willing to disprove your silly theory, but that wouldn't get me anywhere would it?

No it wouldn't, and here's why: 

Because you don't want to hear the truth.
(and for the record, I actually do have a relative that lives in antarctica as a field researcher.)

If you want to ask questions and then get mad because the answer is not what you wanted, then don't ask the question. You're blissfully unaware of both the properties of RET and FET. You're not even arguing against FET here, you're arguing against RET. You're telling me that the Earth is more round than it already is.

I looked out of an airplane window quite recently. The earth looked wonderfully flat.

it looks neither flat nor round;  I cannot see beyond a certain distance and the land that traverses that distance is pretty uneven...

Quote from: PiemanFiddy on December 07, 2012, 01:13:31 PM

Umm... ok


Take your word for it? Well, why should I? I could tell you I have a relative who lives in Antarctica who is willing to disprove your silly theory, but that wouldn't get me anywhere would it?

No it wouldn't, and here's why: 

Because you don't want to hear the truth.
(and for the record, I actually do have a relative that lives in antarctica as a field researcher.)

If you want to ask questions and then get mad because the answer is not what you wanted, then don't ask the question. You're blissfully unaware of both the properties of RET and FET. You're not even arguing against FET here, you're arguing against RET. You're telling me that the Earth is more round than it already is.

Uhh... No I'm not? Please don't put words in my mouth.

I'm just trying to disprove your silly little theory, as weird as there is NOTHING to disprove. This world has been round for years since before ANYONE on this planet existed. So do tell how you actually have evidence that this world is flat if you weren't here to witness it happen first-hand?

Uhh... No I'm not? Please don't put words in my mouth.

I'm just trying to disprove your silly little theory, as weird as there is NOTHING to disprove. This world has been round for years since before ANYONE on this planet existed. So do tell how you actually have evidence that this world is flat if you weren't here to witness it happen first-hand?

Yes, I know RET is a silly theory, but you're not doing a very good job of disproving it. I suggest talking about gravity, that is a fun one.

Quote from: PiemanFiddy on December 07, 2012, 04:19:41 PM

Uhh... No I'm not? Please don't put words in my mouth.

I'm just trying to disprove your silly little theory, as weird as there is NOTHING to disprove. This world has been round for years since before ANYONE on this planet existed. So do tell how you actually have evidence that this world is flat if you weren't here to witness it happen first-hand?

Yes, I know RET is a silly theory, but you're not doing a very good job of disproving it. I suggest talking about gravity, that is a fun one.

What is there to know about gravity? Just look it up, I'm not holding your hand for that one.

You should've learned what gravity is in school anyway... but apparently you don't find the whole concept interesting, therefore wasting time typing out a solid answer for you is pointless. Seeing as you would just counter it anyway.

TheEngineer, a pilot who used to post on this forum, tells us that he has not witnessed curvature on any international flight.

Quote:

"I believe I said that I put myself through college working for an airline, thus having access to free flights around the world.  I also worked for a private FBO, in which the owner owned a Cessna Citation.  I am also a licensed pilot.  Not once, during any of the hundreds if not thousands of flights I've been on, have I ever witnessed the curvature of the Earth."

A five degree change is the average perceptible value, and that is usually when one is presented with multiple degree variations. To be honest, five degrees is really pushing it.

Citation, please.

Quote from: Beorn on December 07, 2012, 12:11:34 PM

I looked out of an airplane window quite recently. The earth looked wonderfully flat.

it looks neither flat nor round;  I cannot see beyond a certain distance and the land that traverses that distance is pretty uneven...

Looked very flat to me.