Functions: accelerate to 180-200 RPM Initial temperature difference: 20 oC Colour: Flywheel Silver Bottom Gold Material: stal and glass Size: 100X100X120 mm Weight: 250 grams lubricate with pencil If necessary, use only pencil powder to lubricate the Stirling engine. Do not add oil to lubrication, as the oil mixes with dust in the air and becomes oil dirt, making the friction even greater. The spinning motor cannot rotate freely. The package includes: 1 x Stirling Engine What is a Stirling engine? Stirling engine is a heat engine that operates by cyclically compressing and expanding air or other gas, working fluid, at different temperature levels, resulting in the conversion of netto of thermal energy into mechanical work. that all the heat of the engine flows through the engine wall. How does it work? This is traditionally known as an external combustion engine, as opposed to an internal combustion engine, where heat is introduced by burning fuel in the body of the working fluid. Unlike the steam engine’s use of water in both the liquid and gas phases as a working fluid, Stirling’s engine surrounds a constant amount of liquid gas, such as air or helium. Like we all heat engines, general cyclists rely on compressing cool gas, heating gas, expanding hot gas, and finally cooling gas before repeating the cycle. This good looking low temperature Stirling motor can be a great gift for friends, family or you. It is almost ready to work: just install the flywheel. After 30 seconds of installation, place it on a cup of hot water and then it will work like Forrest Gump. Please be aware: