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geoff wrights
Jun17-08, 12:25 PM
Hi everbody, I,m new on here but had to join looks really interesting, however the real reason for searching out a forum like this is to try and have a question answered that was put to me and is really niggling me.
Please take a look at the question I have pasted . Can you help with the correct answe and reason why?
geoff
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An aircraft is standing on a runway that can move. The aircraft can move in one direction, while the conveyor belt moves in the opposite direction. This conveyor has a control system that tracks the aircrafts wheel speed and tunes the speed of the conveyor to exactly the same as the wheels, but in opposite direction. There is no wind,
The pilot begins to add thrust to the engines.

Will the plane take off

fedaykin
Jun17-08, 12:42 PM
Damn it, this was even tested on Mythbusters.
Aside from some increased friction in the wheels, there will be no effect. It will take off normally (assuming you don't have a massive backward starting velocity that would screw the plane up.)
I don't think an airplane that provided its thrust through wheels would be very effective.

berkeman
Jun17-08, 12:44 PM
Hi everbody, I,m new on here but had to join looks really interesting, however the real reason for searching out a forum like this is to try and have a question answered that was put to me and is really niggling me.
Please take a look at the question I have pasted . Can you help with the correct answe and reason why?
geoff
--------------------------------------------------------------------------------
An aircraft is standing on a runway that can move. The aircraft can move in one direction, while the conveyor belt moves in the opposite direction. This conveyor has a control system that tracks the aircrafts wheel speed and tunes the speed of the conveyor to exactly the same as the wheels, but in opposite direction. There is no wind,
The pilot begins to add thrust to the engines.

Will the plane take off

This has been discussed at length. A search on the PF for "conveyor" finds the threads pretty quickly.

http://www.physicsforums.com/showthread.php?t=212151&highlight=conveyor

Thread locked.