Precision Stirling Engine Model for Teaching and Demonstration This compact Stirling engine model converts heat into visible piston motion to demonstrate the principles of an external combustion engine. Built with precision metal components and glass parts mounted on a sturdy base, it delivers smooth, quiet operation and durable temperature performance. A small generator is included to show energy conversion by producing electricity as the engine runs. Key features and benefits Clear demonstration of engine principles: Uses external heat to drive piston motion, making thermodynamics and energy conversion easy to observe. Solid construction: Metal and glass components with a rigid base resist deformation under heat and maintain smooth operation over time. Integrated generator: Small generator produces electricity while the engine runs, reinforcing the link between mechanical motion and electrical output. Simple heat source: Runs on an alcohol burner; only basic setup required to start operating demonstrations. Compact size and light weight: Product dimensions 6.5 x 3.7 x 5.1 inches, product weight 1.7 lbs, suitable for tabletop demonstrations and classroom use. Quiet and reliable: Lownoise operation makes it suitable for teaching environments and hobby use. Specifications Dimensions: 6.5 x 3.7 x 5.1 inches Weight: 1.7 lbs Materials: Metal and glass components Power supply: Alcohol burner (use alcohol concentration above 95 percent recommended) Accessories: Small generator included (attached to engine) Setup and starting procedure Check flywheel rotation by pulling the flywheel by hand to confirm smooth movement; if resistance is felt, loosen or tighten adjustment screws and recheck. Inspect and clean sliding parts to remove any dust or debris that could impede motion. Fill the alcohol burner about two thirds full with alcohol of at least 95 percent concentration. Light the alcohol burner and aim the flame to heat the glass test tube for approximately one minute. After warming, gently pull the flywheel to start the engine. Generatorequipped models may require a slightly longer warmup period before they begin producing electricity. Safety notes Do not touch the heated test tube or the alcohol burner during or immediately after operation to avoid burns. Avoid touching the test tube while the burner wick is heating. Allow components to cool before handling or performing maintenance. Practical applications Classroom demonstrations: Illustrate thermodynamic cycles, heat transfer, and mechanical work for physics lessons and lab demonstrations. Science fairs and presentations: Provide a clear visual and handson example of energy conversion and engine operation. Hobbyist and maker projects: Use as a functional exhibit in workshops or as a compact demonstration engine for experimental setups. Suitable users Students and teachers requiring a reliable visual aid for instruction Science demonstrators and researchers conducting smallscale demonstrations Technology enthusiasts and hobbyists interested in mechanical engines and energy conversion This Stirling engine model offers a practical, durable way to demonstrate external combustion engine behavior and energy conversion in educational and hobbyist settings.