Phil-
If your logic were to hold up, then this scenario would be applicable.
- You taxi down the runway for takeoff in your 152. Two-thirds of the way you have to cross a section of the runway that is actually a treadmill, let's just say it's 50' long X the width of the runway, perfectly recessed flush with the runway.
By using your theory, if the treadmill was going the same speed as your ground speed, your plane would instantaniously stop....
No way! The RPMs at each wheel would increase, but the plane would coast right over the treadmill like it wasn't even there. You may get some skidding when you hit the treadmill, or a chirp when you get to the other side, but that'd be the extent of it.
Under these conditions, because you're trying to take off which requires accelleration, the force driving the plane is the powerplant which is pulling air, not momentum or inertia.

-Dave D
Reservoir of Useless Knowledge

"But... If I kill all the golfers, they'll lock me up, and throw away the key..."
-Bill Murray

'84&change Monty MPI Turbo, choptop, f&r lsd, swapped in AT- All the goodies!