Model D Educational Stirling Engine Kit Overview This Model D kit is a handson physics experiment tool that demonstrates heat to motion to electricity conversion. The main body is made from zinc alloy with an electroplated finish for a durable metallic look and enhanced industrial texture. precision matching components deliver smooth, reliable operation for extended use. Key benefits Clear demonstration of thermodynamic principles and mechanical motion, ideal for classroom or home learning. Durable zinc alloy construction and electroplated surface for a longlasting, professional appearance. Precise components and machining provide smooth operation and dependable performance over repeated demonstrations. Builtin generator with colorful LED provides immediate visual feedback of power generation; generated electricity can also be used to run other small lowpower devices. Large power cylinder and piston dimensions increase output compared with smaller models, making the unit more engaging in demonstrations. Important specifications Model: D Main material: Zinc alloy, electroplated finish Power cylinder diameter: 12.5 millimeters Power piston stroke: 15 millimeters Includes generator with multicolor LED Recommended fuel for burner: 95 percent alcohol How it works and basic operation 1. Fill the included alcohol burner with 95 percent alcohol and place it under the roundended cylinder. 2. Light the burner and allow the cylinder to warm for about 60 to 120 seconds. 3. Give the flywheel a gentle push to start the engine; the unit will continue running as the heat source creates the temperature differential that drives the Stirling cycle. 4. In a dim or dark room, the generator LED will display vivid colors as the engine produces electricity. The generated power can be used for small devices within the generator output limits. Use scenarios Classroom demonstration: Show students realtime conversion of thermal energy to mechanical motion and electricity during lectures on thermodynamics or heat engines. Science fair or lab project: Provide a reliable, visually engaging model for experiments, data collection, and presentation of engine behavior under different heat inputs. Hobbyist desktop display: Run the engine as a durable mechanical model that demonstrates engineering principles and lights up the generator LED for visual interest. Notes and compatibility Use 95 percent alcohol as recommended for consistent starting and stable combustion. The engine produces small electrical output suitable for LEDs and other lowpower devices; verify device power requirements before connecting. Operation is easiest to observe in low light when LED color changes are most visible. This Model D kit provides a precise, durable, and practical way to explore Stirling engine operation and basic electricity generation in educational and hobbyist settings.