What happens if you put an airplane on a very big treadmill? - Page 2 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


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Old 02-02-2006, 09:14 PM   #11
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Now where you gonna find that big a treadmill?
Maybe at a fat farm?
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Old 02-02-2006, 09:14 PM   #12
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Quote:
Originally Posted by PontiacDad
Let me breech my thoughts here.

The plane will move forward because of thrust.
Thrust is presure, the presure behind the plane will be much greater than in front.
The wheels will roll on the tread mill, whocares, it will be thrust relative the space around it.

Planes dont need wheels to take off, its not the wheels that move them forward?
Float planes take off from rivers all the time, sort of a treadmill?
yes but rivers dont increase speed with thrust
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Old 02-02-2006, 09:18 PM   #13
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Quote:
Originally Posted by PontiacDad
Let me breech my thoughts here.

The plane will move forward because of thrust.
Thrust is presure, the presure behind the plane will be much greater than in front.
The wheels will roll on the tread mill, whocares, it will be thrust relative the space around it.

Planes dont need wheels to take off, its not the wheels that move them forward?
Float planes take off from rivers all the time, sort of a treadmill?
But they are actually moving foreward, which provides pressure under the wings because of the design of the wing, and in turn lifts the plane.
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Old 02-02-2006, 09:24 PM   #14
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Your sitting in the window seat of a plane ready for take off.

You look out the window, theres air all around and the back of a jet engine.

The captain powers up the turbines and they push air, the treadmill running in reverse has no effect on the air just the wheels.
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Old 02-02-2006, 09:26 PM   #15
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pdad.. it sounds like u are saying that a plane can fly with no wings, as long as there is enough thrust...
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Old 02-02-2006, 09:33 PM   #16
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No it will fly and it will have forward movement relative to the space around it, the wings will have lift.

If that same treadmill operated in the same manner could a plane land on it?

When they dyno a plane do they have to tie it down or do you think they roll on the dyno'* rollers?
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Old 02-02-2006, 09:35 PM   #17
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It'* not the speed of the wheels that propels a jet on the ground. Put a model car on a real treadmill, then push it. It will still go forward, no matter how fast you crank up the treadmill.
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Old 02-02-2006, 09:37 PM   #18
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BOOM it just smacked me in the face... DUH!!!

the wheels have nothing to with it.. they could spin at 2308967305mph and it wouldnt matter..

gotcha pdad... and wow.. i was thinking wtf is up with this old man for a while
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Old 02-02-2006, 09:45 PM   #19
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I was going to try a few other hints but most with some physics should see the wheels dont mean a thing.
It doesnt say the conveyor'* movement keeps the airplane over the starting position relative to the ground, just that it moves in reverse to any movement of the airplane.
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Old 02-02-2006, 09:51 PM   #20
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This sounds like the making of an episode of "Myth Busters"
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