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An jet/propeller airplane is traveling on a giant treadmill at takeoff speed. With respect to what does the plane have takeoff speed? I believe the following two statements are uncontroversial: (1) if the plane has takeoff airspeed (or greater), the plane can takeoff. (2) if the plane does not have takeoff airspeed (or greater), the plane cannot ...


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An airplane's propulsion does not depend on friction between its wheels and the runway so the relative motion of the runway to the body of the airplane has no effect on the plane's motion$^1$. For example an airplane can take off from ice, where the friction between the wheels and the runway surface is effectively zero. So the plane would take off normally ...



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