Balance Stirling Engine Model External Combustion EngineDescription:Item: Balance Stirling EngineItem No.:Size: 155*80*130mmWeight: Approx.800gFlywheel: 60mm(Diameter)Driving Wheel: 25mm(Diameter)Power cylinder bore: 13mmPiston stroke: 15mmMaterial: aluminum alloyLinkage: stainless steelAge: +8 Stirling engines are unique heat engines because of their theoretical efficiency is almost equal to the theoretical maximum efficiency、 Called the Carnot cycle efficiency. The Stirling engine is heated by gas expansion、 cold contraction generate power.  Package Included: 1 × Balance Stirling Engine