So would it be incorrect to state that while the wheels are supporting at least more weight than is negated by lift, the plane IS actually tied to the ground by the wheels? I understand the airspeed and groundspeed thing, but if a plane was sitting on a treadmill and it started moving backwards, the plane would move with it because of what I stated above, right? For those of you saying it would take off, it would only make sense to me if the treadmill itself moved through space with the plan on top to allow for the required airflow across the wings. The engines produce thrust, but they don't produce a cocoon of airflow around the entire aircraft.