Ok I read the first 4 pages and got tired of reading. So here's the answer...
The plane is not going to take off. The plane needs air flowing under it's wings to take off. The only way to achieve that is by moving at a certain speed. The speed is not calculated like a car's speedo (that's pseduo speed)....speed is distance/time. The plane moves 1 foot, the conveyor belt has moved 1 foot in the opposite direction.....thus it distance is 0; 0 distance divided by however long it would have taken to move 1 foot = 0 speed. The matchbox car on the treadmill example doesn't work, speed is distance/time no matter what is propelling the plane, the wheels or the jet engine, it irrelevant because it's speed si going to be matched by the convyor belt.