the belt does not counteract the thrust because it does not act directly upon the thrust. If the plane were tied down, yes, there would be no thrust, but its free to move. the thrust is pushing the BODY of the plane, not the wheels. Think of it like water skiing. the boat is pulling you (thrust) and the skis go along for the ride. same thing.
Funny at the beginning of the thread I thought it wouldnt take off.
