[Frocious]

Incorrect. The plane would have to have been flown at an angle to account for the curvature of the earth. If it did that, then the spirit level would have moved, but it did not, hence proving that the earth is flat.

Incorrect. The plane would have to have been flown at an angle to account for the curvature of the earth. If it did that, then the spirit level would have moved, but it did not, hence proving that the earth is flat.

My goodness you FEers are ignorant. Flying at one G would mean you are following the curve of Earth's gravitational field. This would cause the level to remain centered. More importantly, the motion of a plane in flight and the lack of knowledge of what the pilot is doing with the controls render this experiment completely useless. And this is EXACTLY why we need experts. Backyard science is fun, it can be educational, but it should never be mistaken for real science. This whole experiment only proves that the experimenter had no idea what they were doing. A spirit level??? Not exactly the most sensitive device. Let me guess, the person that supposedly did this probably rested the level on the armrest. The vibrations alone would have added far too much noise to any actual data.

YouTube it, he doesn't rest it on the armrest at all.

If the earth is round, then the pilot would have to dip the plane to account for the earths curvature, and as a result the spirit level would have moved. It didn't, because the plane didn't. And if gravity keeps the plane curving instead, then why is it not strong enough to pull the plane down to earth? It's strong enough to pull the planet into a ball, but powerless to stop a plane flying? Please...

If the earth was round, and the pilot didn't dip the plane to account for the curvature, then the plane would fly in a straight line and would fly out of the sky into space.

All I see is rationalization. At least it's clear why you like Rowbotham so much. Also, after having checked out this video, it's clear as day that the bubble moves around. I don't know why you think it needs to move outside of the 'zone' for this. Oh wait, you just think it should without any math to back up your hypothesis. Gimme an hour or two, let's get some math in here.

I like Dr Rowbothams work because he was what started the flat earth revolution, and his experiments were conclusively sound.

As for the video, the bubble doesn't move. It doesn't move because the earth is flat.

What was Dr. Rowbotham's doctorate in, anyway?

[Curious Squirrel]

Let's see here.

Radius of plane circle ~= 3966 miles
Circumference ~= 24919 miles
Cruising speed ~= 500 mph
Distance of 0.5° ~= 44 miles

Without knowing more about his spirit level, it's impossible to know how accurate it is. But some research suggests it's not unreasonable to assume 2mm of movement should correlate to about 0.5° 'difference' whose distance is shown here. So, how much should we expect the spirit level to move, assuming this accuracy? Not that much I would think. It takes about 5 minutes of flight time to cover the difference in curvature that the spirit level can detect. Even assuming the plane makes an adjustment only every 5 minutes (highly unlikely even assuming they specifically do this) the spirit level will only barely move, an amount easily accounted for within the video. Sorry, unless you can show where I'm wrong, or present something better, I'm gonna have to call this 'spirit level shows the Earth is flat' idea busted.

EDIT: For the record, having just watched the video, the bubble DOES move, it simply doesn't get out of it's little 'housing' area between the two black lines. Watch it though, it moves from touching one line, to touching the other over the course of the video. So your claim 'it doesn't move' is ALSO complete and utter bollocks.

[AATW]

I see Parallax has descended into the "I don't understand something, therefore it can't be true" line of reasoning.
Which isn't a very sound line of reasoning.

[StinkyOne]

YouTube it, he doesn't rest it on the armrest at all.

If the earth is round, then the pilot would have to dip the plane to account for the earths curvature, and as a result the spirit level would have moved. It didn't, because the plane didn't. And if gravity keeps the plane curving instead, then why is it not strong enough to pull the plane down to earth? It's strong enough to pull the planet into a ball, but powerless to stop a plane flying? Please...

If the earth was round, and the pilot didn't dip the plane to account for the curvature, then the plane would fly in a straight line and would fly out of the sky into space.

The armrest issue was only one minor thing. And planes do curve in flight. I explained how it works. I also explained several other issues with this bogus experiment, and you've conveniently ignored them. Gravity will definitely pull a plane (and just about everything else) to the ground. Gravity is a very weak force and it is not difficult to overcome it. This is no different on a FE, btw. The Earth was pulled into a ball during its development. I am continually shocked by how little you seem to understand about basic processes. I guess that is what happens when you get all your info from a tiny source of weirdos with fake beliefs.

[Macarios]

Okay, so all you round earthers, I have a question. Say for arguments sake the earth is a globe, and you have the northern hemisphere and the southern hemisphere. Take Britain, Canada, Australia, and New Zealand. Now Britain and Canada are pointing upwards, right? Whereas the Aussies and kiwis are pointing down, since they are underneath the ball, correct? So using that logic, if you are in Britain and Canada, then since they are on top of the ball, the earth is the floor and the sky is the ceiling. On the flip side, since the other two are on the underside of the ball, that means the floor becomes the ceiling and the ceiling becomes the floor. In other words, the ceiling is the earth and the floor is the sky. So my question to you is simple. Since they are upside down and standing on the ceiling, why don't they fall into the sky?

First thing to know is: what defines "down".
Where it is, and why there?

If Canadians and Brits are "up", then Aussies and Kiwis are "down".
And if Aussies and Kiwis are "up", then Canadians and Brits are "down".

In reality, Earth core is "down", and atmosphere is "up" (and Space above it) all around the Earth.
If you stand on North pole, Polaris is "up", and Sigma Octantis is "down", through the Earth.
If you stand at South pole, Sigma octantis is "up" and Polaris is "down" through the Earth.
And if you stand at Equator (looking west) Polaris is right and Sigma Octantis left.

The force that causes weight is pulling towards the center of the Earth, not towards some arbitrary direction above South pole.
"Down" is where we put our feet to counter our weight.
"Up" is, simply, opposite of that.

[Scroogie]

Well Round Earthers, all I can say is this;

Give it up, you'll never get anywhere debating with a guy who thinks like this:

"If the earth is round, then the pilot would have to dip the plane to account for the earths curvature, and as a result the spirit level would have moved. It didn't, because the plane didn't. And if gravity keeps the plane curving instead, then why is it not strong enough to pull the plane down to earth? It's strong enough to pull the planet into a ball, but powerless to stop a plane flying? Please...

If the earth was round, and the pilot didn't dip the plane to account for the curvature, then the plane would fly in a straight line and would fly out of the sky into space."

There's absolutely no way that I can think of to reach a person whose mind works (or rather fails to work) like that.

[Parallax]

Let's see here.

Radius of plane circle ~= 3966 miles
Circumference ~= 24919 miles
Cruising speed ~= 500 mph
Distance of 0.5° ~= 44 miles

Without knowing more about his spirit level, it's impossible to know how accurate it is. But some research suggests it's not unreasonable to assume 2mm of movement should correlate to about 0.5° 'difference' whose distance is shown here. So, how much should we expect the spirit level to move, assuming this accuracy? Not that much I would think. It takes about 5 minutes of flight time to cover the difference in curvature that the spirit level can detect. Even assuming the plane makes an adjustment only every 5 minutes (highly unlikely even assuming they specifically do this) the spirit level will only barely move, an amount easily accounted for within the video. Sorry, unless you can show where I'm wrong, or present something better, I'm gonna have to call this 'spirit level shows the Earth is flat' idea busted.

EDIT: For the record, having just watched the video, the bubble DOES move, it simply doesn't get out of it's little 'housing' area between the two black lines. Watch it though, it moves from touching one line, to touching the other over the course of the video. So your claim 'it doesn't move' is ALSO complete and utter bollocks.

When the plane moves, its going to move with the turbulence, right? Hence why the spirit level moves the minutist bit. However, if the earth was flat then the bubble would move to the far end when the pilot dips to account for the earths curvature. But it doesn't, because no dip occurs. Once again, if the earth was round and the pilot didn't account for the curvature, the plane would fly in a straight line and out of the sky into space, but this doesn't happen, therefore proving earth is not a globe.

[StinkyOne]

When the plane moves, its going to move with the turbulence, right? Hence why the spirit level moves the minutist bit. However, if the earth was flat then the bubble would move to the far end when the pilot dips to account for the earths curvature. But it doesn't, because no dip occurs. Once again, if the earth was round and the pilot didn't account for the curvature, the plane would fly in a straight line and out of the sky into space, but this doesn't happen, therefore proving earth is not a globe.

OMG, you can't be serious. No, the bubble would NOT move to the far end EVEN if what you're trying to claim was true. It would move a tiny bit off center. And I do mean a tiny bit. Have you ever used a level before??? A slight tilt does not cause the bubble to go to the far end thereby proving you have no clue what you're talking about.

Here - https://www.metabunk.org/explained-why-a-spirit-level-on-a-plane-does-not-show-curvature-corrections.t8741/

[Parallax]

When the plane moves, its going to move with the turbulence, right? Hence why the spirit level moves the minutist bit. However, if the earth was flat then the bubble would move to the far end when the pilot dips to account for the earths curvature. But it doesn't, because no dip occurs. Once again, if the earth was round and the pilot didn't account for the curvature, the plane would fly in a straight line and out of the sky into space, but this doesn't happen, therefore proving earth is not a globe.

OMG, you can't be serious. No, the bubble would NOT move to the far end EVEN if what you're trying to claim was true. It would move a tiny bit off center. And I do mean a tiny bit. Have you ever used a level before??? A slight tilt does not cause the bubble to go to the far end thereby proving you have no clue what you're talking about.

Here - https://www.metabunk.org/explained-why-a-spirit-level-on-a-plane-does-not-show-curvature-corrections.t8741/

Of course I have used a spirit level before. If the plane dipped to account for the curvature of the earth, yes, the bubble would move to the far end because the dip of the plane would be enough to make it so.

[Tumeni]

However, if the earth was flat then the bubble would move to the far end when the pilot dips to account for the earths curvature. But it doesn't, because no dip occurs.

IF the Earth was flat, why would the plane be dipping to account for curvature?

Once again, if the earth was round and the pilot didn't account for the curvature, the plane would fly in a straight line and out of the sky into space, but this doesn't happen, therefore proving earth is not a globe.

Then .... why don't space agencies save all that money they spent on honkin' big rockets, and just send their satellites up in a cheap 'n' cheerful Cessna with the stick pulled all the way back?

You do realise that all aeroplanes have a height ceiling, don't you, and that if they go above this, they fall back when the engines stop working, or the wings stop providing lift, or both?

[StinkyOne]

When the plane moves, its going to move with the turbulence, right? Hence why the spirit level moves the minutist bit. However, if the earth was flat then the bubble would move to the far end when the pilot dips to account for the earths curvature. But it doesn't, because no dip occurs. Once again, if the earth was round and the pilot didn't account for the curvature, the plane would fly in a straight line and out of the sky into space, but this doesn't happen, therefore proving earth is not a globe.

OMG, you can't be serious. No, the bubble would NOT move to the far end EVEN if what you're trying to claim was true. It would move a tiny bit off center. And I do mean a tiny bit. Have you ever used a level before??? A slight tilt does not cause the bubble to go to the far end thereby proving you have no clue what you're talking about.

Here - https://www.metabunk.org/explained-why-a-spirit-level-on-a-plane-does-not-show-curvature-corrections.t8741/

Of course I have used a spirit level before. If the plane dipped to account for the curvature of the earth, yes, the bubble would move to the far end because the dip of the plane would be enough to make it so.

Just so we are both 100% clear, I think you're just trolling. No one could possibly be this ignorant. I mean honestly, do you think the Earth is the size of a beach ball?

[Parallax]

When the plane moves, its going to move with the turbulence, right? Hence why the spirit level moves the minutist bit. However, if the earth was flat then the bubble would move to the far end when the pilot dips to account for the earths curvature. But it doesn't, because no dip occurs. Once again, if the earth was round and the pilot didn't account for the curvature, the plane would fly in a straight line and out of the sky into space, but this doesn't happen, therefore proving earth is not a globe.

OMG, you can't be serious. No, the bubble would NOT move to the far end EVEN if what you're trying to claim was true. It would move a tiny bit off center. And I do mean a tiny bit. Have you ever used a level before??? A slight tilt does not cause the bubble to go to the far end thereby proving you have no clue what you're talking about.

Here - https://www.metabunk.org/explained-why-a-spirit-level-on-a-plane-does-not-show-curvature-corrections.t8741/

Of course I have used a spirit level before. If the plane dipped to account for the curvature of the earth, yes, the bubble would move to the far end because the dip of the plane would be enough to make it so.

Just so we are both 100% clear, I think you're just trolling. No one could possibly be this ignorant. I mean honestly, do you think the Earth is the size of a beach ball?

No I think its flat.

[Curious Squirrel]

When the plane moves, its going to move with the turbulence, right? Hence why the spirit level moves the minutist bit. However, if the earth was flat then the bubble would move to the far end when the pilot dips to account for the earths curvature. But it doesn't, because no dip occurs. Once again, if the earth was round and the pilot didn't account for the curvature, the plane would fly in a straight line and out of the sky into space, but this doesn't happen, therefore proving earth is not a globe.

OMG, you can't be serious. No, the bubble would NOT move to the far end EVEN if what you're trying to claim was true. It would move a tiny bit off center. And I do mean a tiny bit. Have you ever used a level before??? A slight tilt does not cause the bubble to go to the far end thereby proving you have no clue what you're talking about.

Here - https://www.metabunk.org/explained-why-a-spirit-level-on-a-plane-does-not-show-curvature-corrections.t8741/

Of course I have used a spirit level before. If the plane dipped to account for the curvature of the earth, yes, the bubble would move to the far end because the dip of the plane would be enough to make it so.

I just showed you why what you think is wrong based on the most likely sensitivity of the level in this video. You ignored it to once again restate your claim without evidence. Either you're a troll or someone who is so profoundly ignorant they cannot conceive of being wrong. Either way this is clearly a waste of time. Good day.

[Parallax]

When the plane moves, its going to move with the turbulence, right? Hence why the spirit level moves the minutist bit. However, if the earth was flat then the bubble would move to the far end when the pilot dips to account for the earths curvature. But it doesn't, because no dip occurs. Once again, if the earth was round and the pilot didn't account for the curvature, the plane would fly in a straight line and out of the sky into space, but this doesn't happen, therefore proving earth is not a globe.

OMG, you can't be serious. No, the bubble would NOT move to the far end EVEN if what you're trying to claim was true. It would move a tiny bit off center. And I do mean a tiny bit. Have you ever used a level before??? A slight tilt does not cause the bubble to go to the far end thereby proving you have no clue what you're talking about.

Here - https://www.metabunk.org/explained-why-a-spirit-level-on-a-plane-does-not-show-curvature-corrections.t8741/

Of course I have used a spirit level before. If the plane dipped to account for the curvature of the earth, yes, the bubble would move to the far end because the dip of the plane would be enough to make it so.

I just showed you why what you think is wrong based on the most likely sensitivity of the level in this video. You ignored it to once again restate your claim without evidence. Either you're a troll or someone who is so profoundly ignorant they cannot conceive of being wrong. Either way this is clearly a waste of time. Good day.

I actually haven't. I said it moved slightly because planes can be affected by turbulence, but an actual dip, that would have to happen if the earth was round to account for the curvature, would have moved the bubble since spirit levels are pretty sensitive. But it didn't, and no link to a random post by 'somebody' is going to disprove it.

[Tumeni]

If the plane dipped to account for the curvature of the earth, yes, the bubble would move to the far end because the dip of the plane would be enough to make it so.

So .... at the end of the journey the bubble would ... remain at the far end?

And if the person performed the reverse journey, it would go back to the centre when they arrived at the original starting point?

So you're saying that the starting point of the journey was at a level point, and the end point wasn't? Does this apply to all plane journeys, or only those taken by FEers?

[Parallax]

If the plane dipped to account for the curvature of the earth, yes, the bubble would move to the far end because the dip of the plane would be enough to make it so.

So .... at the end of the journey the bubble would ... remain at the far end?

And if the person performed the reverse journey, it would go back to the centre when they arrived at the original starting point?

So you're saying that the starting point of the journey was at a level point, and the end point wasn't? Does this apply to all plane journeys, or only those taken by FEers?

No because if the earth was round and the pilot accounted for the curvature, then the bubble would level up when the plane isn't dipping.

[inquisitive]

If the plane dipped to account for the curvature of the earth, yes, the bubble would move to the far end because the dip of the plane would be enough to make it so.

So .... at the end of the journey the bubble would ... remain at the far end?

And if the person performed the reverse journey, it would go back to the centre when they arrived at the original starting point?

So you're saying that the starting point of the journey was at a level point, and the end point wasn't? Does this apply to all plane journeys, or only those taken by FEers?

No because if the earth was round and the pilot accounted for the curvature, then the bubble would level up when the plane isn't dipping.

You need to understand that the spirit level is parallel to the ground when showing level, wherever it is. What angle does the plane have to dip to follow the round earth?

[Macarios]

When the plane moves, its going to move with the turbulence, right? Hence why the spirit level moves the minutist bit. However, if the earth was flat then the bubble would move to the far end when the pilot dips to account for the earths curvature. But it doesn't, because no dip occurs. Once again, if the earth was round and the pilot didn't account for the curvature, the plane would fly in a straight line and out of the sky into space, but this doesn't happen, therefore proving earth is not a globe.

Sorry to disappoint you, airplane leans on air and keeps altitude by air lift on wings.
Higher it goes the air is thinner and the lift on wings is weaker at the same speed.
That is why airplane needs maneuvering action to increase altitude.
If it goes lower, the air is denser and lift on wings is stronger, pushing it up.
That is how airplane keeps the altitude.
Not by straight line, but by balance in air density (pressure).
And that is why design itself doesn't allow airplane to fly off into Space.

The layer with constant density is not flat, it follows the Earth's surface.
Altimeter works like barometer, with scale calibrated directly in altitudes.

So, altimeter follows the layer with constant air pressure, not the flat line.

Another instrument used for decades in airplanes is Artificial Horizon.
It follows vertical lines, and vertical lines tilt with distances.

Two verticals apart from each other are both pointing towards the center of Earth, so they are not parallel.
Two verticals 1852 meters apart are tilting from each other for one arc minute.
That was why the nautical mile was defined to be 1852 meters in the first place.
It was defined to make navigator's job easier.
One degree is exactly 60 nautical miles (69 statute miles, 111.12 km).
If, for example, navigator measures travelled distance of 3 degrees 12 minutes, it will be 3*60+12 = 192 nautical miles away from, say, port they left.

As airplane travels, "down" is along new, current vertical, not along old vertical at "x" miles back.
Spirit level will follow the tilt as well, because weight of the liquid inside will pull towards new "down".
As airplane travels, artificial horizon self-corrects to new verticals as well, and pilot doesn't calculate "dip".
He just has to fly perpendicular to current vertical, which is along new horizontal, not the old one.

This is how artificial horizon self-corrects, and it is faster than the speed at which the airplane reaches new verticals.

 

[Devils Advocate]

Haha you are definitely a troll parallax but that's fine, this forum caters for all :-) to anyone reading this thread who is thinking the OP warrants debate just remind yourselves WHY our maps/globes are depicted the way they are.
The British empire created them, that's what GMT is: Grenwich Mean Time, hence why the UK is dead centre and time set to 0, the USA to the left is minus and OZ to the right is plus hours.
In the same way the British explorers (and other Europeans) were the ones responsible for the maps we use hence why they put Europe "on top".
I can't believe anyone can truly believe that this makes a top and bottom of the globe a reality. Its troll fodder, but amusingly so.....

[douglips]

If you think a spirit level will indicate when the aircrafts attitude changes, you need to reconsider. How does Bob Hoover do his famous barrel roll with a constant acceleration vector keeping his tea almost perfectly level? He even pours a cup of tea while rolling the aircraft.