Features: 1. Working Principle: The Stirling engine is a heat engine that converts heat energy into mechanical work by cyclically compressing and expanding air or other gases at different temperatures. 2. Performance: This model operates quietly and steadily, capable of running for extended periods. It offers low noise, low pollution, and low operating costs. 3. Simple Operation: To start, add 95% alcohol (recommended) to the alcohol burner and ignite it. Allow the light to heat the bob cylinder for approximately 30 seconds, then gently push the flywheel to initiate operation. 4. Craftsmanship: Constructed from zinc alloy and glass, the Stirling engine showcases an exquisite design. The model includes non-slip pads on the base for safety and features an overall shape that blends texture with aesthetics. 5. Educational Value: The transparent glass tube and alcohol lamp allow for direct observation of the piston's movement, making this an excellent gift for students, teachers, children, friends, and colleagues. Specification: * Material: Metal * Product Color: Silver * Package Size: 17.2 x 9.2 x 11cm * Package Weight: 460g Package Includes: * 1 x Stirling Engine Motor Model