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Originally Posted by iCurtis
Well I don't want to muddy this debate with my lack of appropriate formulas, but I think the plane would still take off in a wind tunnel.
A plane is not a big brick wall, it is aerodynamic to reduce wind friction. Therefore in a wind tunnel it would still take off if the wind was blowing at the same speed as the plane was moving, because the wind is slipping around the plane, not pressing against it.
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yes. in a windtunnel it will take off. technically not because the wind is "slipping" around the plane but because the plane's aerodynamics do not choose how fast the plane is moving to the ground but only with how fast the air over and under the wings are flowing.