Quote Originally Posted by Interlude
I was talking about the motorized treadmill.

So in this subject, the treadmill is free spinning and NOT motorized??:confused:

If so, you're 100% correct. It's the same as those air plane on the water. It WILL LIFT OFF.
No, the treadmill is motorized, but the wheels of the plane are free spinning. The treadmill has torque, but it ONLY applies it to wheels that are free spinning.

Your dyno question was wrong in a sense. The wheels on the car would need to be free spinning (in neutral) as well. Will the dyno work and apply torque to the car if the car is in neutral? Nope. Just like the treadmill will not apply torque to the plane if the wheels are free spinning.