Balance Singlecylinder Hot Air Stirling Engine Model with USB Light A compact, metal Stirling engine model designed for handson demonstration and desktop display. This singlecylinder hot air engine runs on external heat supplied by an alcohol lamp and can drive a small USB light while you observe the conversion of thermal energy to mechanical and electrical energy. Key benefits Demonstrates thermodynamic principles in real time: external heating causes cyclic expansion and compression of trapped gas to produce continuous motion. Visual and tactile learning tool: spinning motion and illuminated USB light make the energy conversion process easy to follow and engaging. Durable, attractive construction: main body formed from zinc alloy with electroplating for a rich metallic finish and precise, matchable components for smooth, reliable operation. Features and specifications Function: Hot air Stirling engine, singlecylinder balance design, run by an alcohol lamp heat source. USB Light: Includes a USBpowered light that the engine can illuminate during operation, demonstrating power generation. Material: Metal; main body zinc alloy with electroplating. Product dimensions: 16.5 x 9.5 x 11.5 cm (6.5 x 3.7 x 4.5 inch). Product weight: 650 g. Package dimensions: 20.5 x 11.5 x 18.5 cm. Package weight: 950 g. Packing: Graphic carton. Performance details Quick startup and visible rotation when heated by an alcohol lamp, suitable for small demonstrations and experiments. Precision machined parts and balanced singlecylinder design for steady motion and consistent running behavior. Practical applications Classroom demonstrations: Teach basic thermodynamics and energy conversion principles in physics or engineering lessons. Hobbyist projects and display: Add a working mechanical conversation piece to a desk, workshop, or model collection. STEM education and experiments: Use as a lab tool to compare input heat, rotation speed, and light output while exploring closedcycle engine behavior. What you get Complete Balance Singlecylinder Hot Air Stirling Engine Model with USB light, ready for assembly and operation with an external alcohol lamp heat source. Packaging in graphic carton for storage or transport.