Bricksdiytoy RETROL R01 1/12 Scale Engine Model - Butane Powered Water-Cooled Stirling Engine, Functional Closed-Cycle Design, STEM Educational Kit & Vintage Decor for Adults & Tech Enthusiasts

【Functional Butane-Powered Engine】 This 1/12 scale hot air pumping engine operates as a real external combustion Stirling engine, fueled by butane gas (not included). Watch the piston, flywheel, and water-cooling system work together in a mesmerizing display of thermodynamics 【Working Water-Cooled System】 Features an integrated water tank and cooling circulation to ensure stable, extended operation. Just add 80ml of water to observe the engine’s efficient heat dissipation in action 【Retro Industrial Design】 Combines vintage aesthetics with modern engineering-polished metal construction, exposed mechanical parts, and a compact footprint make it a stunning desktop decor piece 【Easy to Operate & Maintain】 Simple startup: Fill the butane tank, ignite the boiler, and hand-crank the flywheel. Low-maintenance design with minimal moving parts ensures durability for beginners and experts alike 【Educational STEM Gift】 Perfect for demonstrating mechanical engineering and thermodynamics principles. Packaged in a gift-ready box, it’s an ideal present for teachers, students, and collectors ages 14+, Manufacturer: Bricksdiytoy