Phil -

The amount of force that can be applied by the treadmill to the airplane is limited to the amount of friction in the plane's wheel bearings. The airplane's thrust easily counters it. You'd still need to rev the engine to get the plane moving, but move, it would.

Imagine yourself on roller skates and standing on a treadmill with side rails. Don't you think you could pull yourself forward against the direction of the treadmill?

Frank

'89 [color:"white"]G-Raider[color:"white"] [color:"black"]Supercharged 3.0L, MegaSquirt 2, lockup A/T, 2.5" exhaust, 172k, Cibie H4s/Oscar SCs, Hella Micro DE fogs, Cobra CB, Superwinch hubs, LSD rear/Aussie Locker front, Bilsteins, Lifeline AGM, Rust-Oleum