Quote Originally Posted by Sturtle View Post
Yes, that is all true, except if the props are running for all it's worth, the plane WILL be moving forward, regardless of what the treadmill is doing, because the wheels are free spinning. Do you agree?
Not if the treadmill is running at the same speed. That's how I understand the myth, the treadmill is going the same speed as the forward motion of the plane, so the plane is essentially standing still, even though it's at takeoff power and the wheels are spinning.

In other words, if you were standing next to the plane while this was going on, and the plane isn't moving forward in relation to your position, it's not going to lift off.