Hi, We have been discussing this following problem to the death at a different forum. I figured I will ask the professionally oriented what they have to say about it. The problem: The airplane (jet or the other one) is on the special surface, which can run backwards - opposite the direction of the tested airplane ready to take off. The speed of the moving surface is equal the speed of spinning wheels of the airplane at any time that is regulated persistently and efficiently by a special device. The problem (question): will the airplane be able to run on this surface and then take off? My take on it is it would, because the propeller is creating the forward motion not the wheel. But some say the wheel would spin so fast that it would create enough friction to counter the effect of the prop. I can't see that happening. Probabaly this is a base school level question here but please chew in. Thanks!