The basic idea of the so called Minto wheel is to build a simple motor, that is driven by a temperature differential between a hot water reservoir and the surrounding cooling air. The spokes of a wheel-like structure are made from tubes with a liquid inside, that exist both in a gaseous and a liquid phase in the desired temperature range. They are connected to bulb like reservoirs at both ends, in a way that the ends of the tubes protrude into each reservoir a little bit...