The coil engine is an experiment that the folks at “MakeItExtreme” conducted in order to build a machine that is able to revolve using electromagnets. But, how to try doing this experiment on your own? It’s a enormous challenge but it’s worth it.
First, you need 4 electromagnets that could elevate objects weighing 200 kg. Then, you place the electromagnets in an immovable, metallic piece. Above the electromagnets you put a movable metallic material. This piece should decline due to the attraction caused by the electromagnets. Further, this piece ought to be able to return back to its primary point with the help of a spring. Using a system of gears and this small move, a constant revolving move is caused.
Check it out!