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Fun physics question.

Old 07-12-2017, 08:11 AM
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Default Fun physics question.

I say yes.
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Old 07-12-2017, 08:12 AM
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Didn't Mythbusters do this?
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Old 07-12-2017, 08:14 AM
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No, the wheels are just spinning. Need to create lift to take off so the plane needs to move at speed. Basically the above premise is like holding a stupid fidget spinner in your hand.
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Old 07-12-2017, 08:16 AM
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Yes, the wheels do not provide for anything but stability, the engines provide the thrust.
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Old 07-12-2017, 08:17 AM
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Originally Posted by Mako 234 View Post
Didn't Mythbusters do this?
Yep, and the plane took off.
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Old 07-12-2017, 08:17 AM
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Only if we can also imagine a giant fan in front of it that will create lift by wind passing over the wings.
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Old 07-12-2017, 08:17 AM
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Yes. The wheel speed doesn't matter. Thrust and air speed does.

They'll just spin twice as fast as usual.
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Old 07-12-2017, 08:17 AM
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No. The plane would not be moving through space (air, most importantly) so there is no way to create lift.
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Old 07-12-2017, 08:17 AM
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lol.
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Old 07-12-2017, 08:20 AM
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The first thing most people think of is that the plane is on a treadmill.
Thats not the case because there is no connection between what moves the plane forward and the treadmill/runway.
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Old 07-12-2017, 08:21 AM
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Originally Posted by Mr. Demeanor View Post
The first thing most people think of is that the plane is on a treadmill.
Thats not the case because there is no connection between what moves the plane forward and the treadmill/runway.
This. The wheels free spin. The physics of thrust are still there. Plane takes off as normal.
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Old 07-12-2017, 08:21 AM
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The wheels on a plane do nothing to make the plane fly.
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Old 07-12-2017, 08:21 AM
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The jets wheels will just spin twice as fast.
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Old 07-12-2017, 08:22 AM
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Ahhh yeah that's true since the plan is jet propelled, not wheel propelled. That's what I get for not thinking it through.
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Old 07-12-2017, 08:27 AM
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Newton's 3rd....prepare for departure.
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Old 07-12-2017, 08:28 AM
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No wind speed over the wings = No take off.
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Old 07-12-2017, 08:29 AM
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Originally Posted by aFORDable View Post
No wind speed over the wings = No take off.
But you will have wind speed, so it will take off.

The 4 big assed engines on a 747 don't care what the wheels are doing.
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Old 07-12-2017, 08:36 AM
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Does a plane fly slower over a body of water moving in the opposite direction? :-)
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Old 07-12-2017, 08:40 AM
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NCSU nailed it.
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Old 07-12-2017, 08:42 AM
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Originally Posted by NCSUboater View Post
But you will have wind speed, so it will take off.

The 4 big assed engines on a 747 don't care what the wheels are doing.
The wings do not care what the engines or wheels are doing.

If no wind over the wings, you have no lift, therefore no take off.

In reverse, if the 747 was facing into the wind during a hurricane and the wind exceeded the rotate speed of the aircraft, you would have liftoff. Just no forward movement.
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