I ve read in inmemorized source that there is existence of an effect so called Gutenberg effect. I draw major things of it here and ask all of you: who ever read that? Is it true or not? 1- Gutenberg effect: a Swedish engineer discovered this effect when he supply a DC power of 3V (to AAA bateries) to steel rails of train, then he saw that a segment of the train move without any motor. 2- Someone had tried to reach this effect in another way: put a numbers of magnetized metal spheres in a metal ring, then when this structure rotates, it made a propulsion. I am looking for a new kind of propulsion and I remember this issue. Now I give you to ask and discuss more if interested. Thank so much.