Propeller Aircraft Head Shape Stirling Pocket Engine Model Toy Compact, educational, and visually striking Stirling engine model shaped like a propeller aircraft head. This tabletop model demonstrates the Stirling engine principle through handson operation, making it suitable for hobbyists, educators, and collectors who want a clear, mechanical demonstration of thermal expansion and motion. Key benefits Demonstrates thermodynamic motion in a visible, handson way for learning and demonstration. Compact and attractive design doubles as a decorative desk or shelf piece. Durable materials and polished finish provide lasting visual appeal and reliable operation. Main features Model type: Propeller aircraft head shape Stirling pocket engine model toy. Overall size: 7.1 x 4.5 x 3.7 inches. Materials: Main body stainless steel, propeller head brass and glass, with select plastic components. Finish: Meticulous polishing with bright color that resists rust and fading. Weight: Product weight 300 g. Package weight 400 g. Packing: Supplied in a box. Package dimensions 8 x 8 x 12 cm. Package contents: 1 x Stirling engine model toy. How it works Place the engine model on a horizontal, stable surface. Add fuel: pour 95 percent alcohol into the included alcohol lamp reservoir. Alcohol is not included and must be provided separately. Ignite the alcohol lamp with appropriate care and supervision. Help the flywheel start by turning it by hand; the heat from the lamp causes air expansion in the piston tube and drives the flywheel into continuous motion. The transparent glass components let you observe the full running process and the Stirling starting principle in action. Performance and use notes Designed for smallscale demonstrations and desktop use. Requires a stable, heatresistant surface and basic precautions when handling open flame. Not intended for continuous heavyduty operation; operate under supervision and follow commonsense fire safety practices. Practical applications Classroom demonstration: Illustrate basic thermodynamics and engine cycles in physics lessons. Office or home display: Serve as an engaging conversation piece that also demonstrates mechanical motion. Hobbyist collection: Add to a collection of mechanical models and kinetic desk toys for handson experimentation. What you receive One Stirling engine model toy packaged in a compact box with dimensions 8 x 8 x 12 cm and total package weight 400 g. Operation reminder Use 95 percent alcohol as fuel, provided by the user. Ensure a stable placement and take appropriate fire safety precautions during use.