Quote:
Originally Posted by photon
Not in any airplane I've seen, the wheels on an airplane aren't driven, they just spin free (and have brakes).
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We have to get to the same page here. Would you agree that there is a relationship between the runway and the wheels where gravity is concerned? Nothing to do with drag coefficients or friction.
Now the reason an airplane can break free from gravity is because it has a stable base <the runway> of which it can propagate itself forward. Now introducing a moving counteracting surface will cause the free wheeling land gear of the plane to no longer allow forward movement.
All forces being equal