Matthias Wandel, an engineer and mechanic, collected in his Studio is quite simple but very powerful motor. How to make this engine using a couple of solenoids and wooden parts he showed in the video.
If you have a few inductors, a few wires and screws, as well as excess timber, then you can easily assemble your own engine. The author notes the resemblance of the design with an ordinary steam engine, but instead of water power for the torque is attached to an electric current. The connecting rod is made of aluminum, and the crankshaft — from the ordinary thick wire, strong enough not to deform during operation.