Quote:
Originally Posted by clevalley  Air moves over the airfoil by the plane moving forward. If the engines are providing thrust to move the plane @ 500 MPH, but a device under it was spinning at 500 MPH the net gain/movement of the place would be 0MPH - thus NO airflow over the airfoil, this would equal 0 lift.
Now, if the engines exceeded the forward moment of 500+ MPH, then the plane would move forward which causes air to flow over the airfoil - whatever the minimum speed for take-off/lift would be would be needed to be added to the delta baseline of 500MPH plane speed to achieve lift in the above scenario.  |
There is a lengthy thread on it in this forum. The plane will fly. You all are being distracted by the wheels and treadmill. The wheels are not providing propulsion, the jet engines are. The wheels can spin to pieces and it's irrelavant.
The engines generate the thrust that pushes the plane forward. Once the engines push the plane fast enough, the plane flies.
What happens at the wheels is irrelavant.