Stirling Engine Model Toy Car — Zinc Alloy, 15.8 x 11.4 x 9 cm Product overview This Stirling engine model combines a working hotair engine and a toy car in a single, collectible unit. Finished in zinc alloy with fine polishing, the assembled model demonstrates the Stirling principle in a visible and handson way. It is designed for classroom demonstrations, hobby experiments, and desktop display. Key benefits Clear, handson learning: Observe the full running cycle of a Stirling engine to understand thermal expansion and mechanical motion more intuitively. quality finish: Zinc alloy construction and fine polishing give the model a look and durable feel suitable for display or repeated demonstrations. Ready to use and adjustable: The unit comes assembled for collection and display, with included tools for minor adjustments and maintenance. Stable lamp mounting: The model includes a slot that holds the lamp securely for stable operation and easy observation of the piston tube and moving parts. Function and operation Place the model in a horizontal position before operation. Pour fuel into the lamp and light it. Use 95 percent alcohol fuel for the lamp. After about 1 to 2 minutes of preheating, the lamp heats the piston tube. The trapped dry air expands and contracts, driving the piston and producing motion that makes the car move. Manual observation allows users to see the full mechanical cycle and follow cause and effect between temperature change and motion. Specifications Item type: Stirling Engine model toy car Material: Zinc alloy Size: Approximate dimensions 15.8 x 11.4 x 9 cm (6.2 x 4.5 x 3.5 in) Purpose: Educational demonstration, physics learning, mechanical hobby and collection Package contents 1 x Stirling Engine model 1 x Lamp 1 x Pad 1 x Screwdriver 1 x Wrench 1 x Tweezer 3 x Elastic string, with 2 installed on the product Use scenarios Classroom demonstration: Show thermodynamics principles and engine cycles to students in a clear, visual way. Science fair project or lab experiment: Use the model to demonstrate conversion of heat energy to mechanical motion and to time or measure simple performance variables. Hobbyist display and tinkering: Keep the assembled model on a desk or shelf as a functional exhibit, and use the included tools to adjust or maintain moving parts. Notes Please allow 0 to 1 inch difference due to manual measurement. Actual product color may vary slightly from photos due to display differences. Please refer to the physical product.