Crabfu’s awesome steam powered creations – “These steam machines are real miniature live steam engines. Principles are simple, heat + water = steam, steam pushes pistons and provides power in a circular motion…. how you harness that work is up to you :) I use mainly stationary or marine engines to start. They use alcohol, gas, or solid fuel tablets for heat, and requires oiling on each run. Distilled water is recommended, and steam pressure can build up around .8 – 1.5 bars, or around 10-20 psi…. NOT a lot of pressure. They have safety valves which releases the steam at a certain pressure, as not to “blow up”, and typical running time is about 10 minutes.” Link.