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Originally Posted by Locke
Right, but if the plane is going forwards, on a conveyor going backwards then its stationary assuming both speeds are equal right?
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That's the assumption which gets people in this. Just because the conveyor goes backwards doesn't mean that will counteract the forward thrust of the engines.
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And yeah, the propeller generates thrust, but it also moves air from front to back for thrust, that still moves a little air under the wings, but hardly enough to lift the plane right?
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The thrust will push the airplane forward regardless of what the wheels are doing (assuming that there isn't enough friction to flip the plane or something like that).