I am now starting to believe that madman is correct. The treadmill speed will consistantly increase to match the opposing velocity, so therefore you will stay in one place. The jets are basically working to keep you from flying off in the opposite direction.

Stand on a treadmill in a pair of roller blades. If you aint holding on, you fly off the back. Strapping jets to your back will counter that momentum, but if you are on some super sonic treadmill that can continually exert the opposing force to the jets, you will never reach forward motion, you will contantly be stationary.

It would be the same with the plane. You would never get airflow over the wings. BECAUSE THE TREADMILL WILL CONTINUALLY SPIN FASTER. (since that is the whole premise of the question.)

If the treadmill reached a maximum velocity that does not match the output of the jets then perhaps enough forward motion would be reached to provide enough airflow for lift.

But since hypothetically the treadmill will always match the output of the engines, it will reamin stationary.

Look at it this way. If you shut down the engines, you would fbe thrown through the wall behind you wheels or not.

Thats how I see it.
_________________________
Chirpa Chirpa Bockala!