@Erdayastronaut If the treadmill is moving with say 1000 km/h, then it will accelerate surrounding air, because the relative speed at the treadmill surface Is 0. If it's long enough (and it is), the air speed at the height of the wings will exceed V0 and the airplane will take off. 2/2
@Erdayastronaut I cannot really follow this wheels freely spinning with friction argument. As others mentioned the air speed matters! And here comes the boundary layer theory. It postulates that the air speed directly at a surface is 0 relative to the surface. 1/2
@swakPyFoam "Never ever break user experience"! Never understood why do heavy renaming in a production code. Extend still supported? I'm using ESI and extend by now.