quality double cylinder Stirling engine model that combines durable materials, visible mechanics, and dynamic LED lighting for demonstration and display. Key features Solid construction: body components made from zinc alloy and stainless steel mounted on a sturdy oak base with four nonslip pads for stable placement. Metal flywheel with epoxy finish: enhances industrial texture and delivers smooth rotation. Clear viewing: glass cylinders and visible pistons let observers follow the engine cycle in real time. Dynamic LED lighting: fastrotating flywheels drive a small generator bulb, producing an eyecatching illumination when the engine runs. Strong performance: double cylinder motor delivers robust motion with output voltage in the range of 3.05.5V. Simple operation: fill the included alcohol burner with 95 percent alcohol, light it, let it burn about 30 seconds, then gently press the flywheel to start. Benefits and why this model matters Educational demonstration: makes thermodynamic and mechanical principles tangible for students, teachers, and hobbyists by showing piston movement, heat to motion conversion, and basic electricity generation. Reliable desktop display: the combination of metal and oak construction provides a longlasting, attractive model for office, lab, or home display. Engaging visual effect: the LED bulb driven by the generator creates clear visual feedback of the engine at work, helping maintain audience attention during demonstrations. Easy to use and maintain: straightforward setup with common fuel and visible components that allow direct observation without complex assembly. Practical applications Classroom and lab demonstrations: use this model to illustrate heat engines, Stirling cycle behavior, and energy conversion in physics or engineering lessons. Office or home display: place on a desk or shelf as an educational decor piece that starts conversations and demonstrates mechanical motion. Science fairs and hobby exhibits: portable and visually engaging for handson demonstrations and smallgroup presentations. What is included and how to operate Engine model assembled on oak base with four nonslip pads. Alcohol burner for fuel use. Operation steps: fill the burner with 95 percent alcohol, light the burner, allow it to burn for roughly 30 seconds, then gently press the flywheel to begin operation. As the flywheels accelerate, the generator bulb will illuminate. Materials and performance summary Materials: zinc alloy and stainless steel for the main structure, oak base, metal flywheel with epoxy finish, and clear glass cylinders. Performance: double cylinder motor with voltage output approximately 3.05.5V when running. This Stirling engine model offers a durable, visually engaging way to demonstrate heat engine principles and basic electricity generation in educational, display, and hobbyist settings.