Stirling engine model steam engine Science Physics Teaching Product information: Size: 110x65x70mm Net weight: 180g Body connecting rod material: aluminum alloy Heat cylinder material: quartz glass Base material: Bamboo Operating instructions: Heat the fuel with 95% alcohol, heat it for 30 seconds or so, turn the flywheel to start the Stirling engine model, which can be in positive and reverse direction. It is forbidden to add any lubricating oil to the cylinder piston.