Physics Plane on conveyor belt
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 Jun 16 2009, 02:16 PM
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#1
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QUOTE(wKkaY @ Jun 16 2009, 01:51 PM) Consider another body that requires airspeed to fly - a kite. If you were to run on a conveyor belt holding a kite, will the kite take off? Kites are very light and I think the wind itself can make the kite 'take off' if you just raise it with your arms while tilting it. But for planes I don't think this would be possible.  @TS I agree with your opinion. If the plane can take off without a runway, why do we still need the runway? Hehe.. |
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Jun 16 2009, 06:48 PM
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#2
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The video does not seem convincing that the speeds match exactly at every moment. How do they coordinate? Comparing a car and a plane, shouldn't the plane have a higher acceleration? |
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Jun 16 2009, 07:03 PM
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#3
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617 posts Joined: Jun 2008
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QUOTE(SeaGates @ Jun 16 2009, 06:51 PM) They did a control test to determine the minimum take off speed of the plane and it's shown that the car can match that speed. Ah..a control test. But the accelerations would still be different (since they didn't mention the synchronisation method), right? This would cause a net force.I am not very convinced because I do noticed some forward momentum in the plane. I really hate to prove them wrong because I am a big fan of them  but in truth I still don't see how a plane can fly while remaining stationary.Another possible explanation is the plane design itself. The air pushed by the propeller actually passing through the wing, and there's enough lift to lift the wheel away from the conveyor belt, allowing it to accelerate forward and fly off. |
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Jun 22 2009, 02:46 PM
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#4
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So, since many of us here agree that the plane can take-off even when it is on the conveyor belt, can we use this to decrease the length of the runway?
*Let's assume that we can manufacture a conveyor belt that is strong enough |
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Jun 26 2009, 02:09 AM
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#5
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QUOTE(Aurora @ Jun 25 2009, 09:55 PM) Nope, it wouldn't help the plane to take off earlier. We will still need a conveyor as long as the runway. You mean the conveyor belt does not affect the plane at all? I thought that happens only when everything is assumed to be ideal? Imagine if you set the conveyor belt to turn in the direction at which the plane is about to take-off. Wouldn't that help? |
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