Joytopiaminds Retrol Steam Engine Model Kit, Beam Vacuum Flame Eater Engine, Adjustable-Speed External Combustion Model with Air Cooling, Physics Science Education Toys for Adults

【Flame-to-Motion Magic】Demonstrates heat-to-mechanical energy conversion using 95% alcohol or ethanol (not included). Watch the flame licker piston cycle with a 24mm stroke and air-cooled operation, achieving 100-1000rpm speeds for 20+ minutes ⚙️【Adjustable Speed & Low Maintenance】Control engine speed via flame intensity. Simplified design with fewer moving parts ensures durability and beginner-friendly operation. Includes graphite lubrication tools and spare valve slices ️【Premium Industrial Craftsmanship】Built from stainless steel, brass, and aluminum with a sleek acrylic base (20x9x14cm). Polished metal finishes and visible mechanics showcase retro-industrial aesthetics 【Hands-On STEM Learning】Ideal for classrooms or hobbyists to explore thermodynamics, vacuum principles, and external combustion. Manual start and disassembly teach maintenance skills 【Unique Gift for Enthusiasts】Packaged with wick, hex wrenches, and instructions in a graphic carton. A striking desk display for engineers, collectors, or educators passionate about vintage machinery