Quote Originally Posted by d993s
HOW will it gain lift? It needs a high velocity of air under it's wings (which it clearly won't have by traveling at a few mph relative to the ground).

Where is the lift coming from? Maybe if you angle the treadmill at 45 degrees and if the engines have enough power to launch it up like a Harrier Jet.

Think about what you are saying, what (if anything) is preventing the plane from propelling itself forward?