Joytopiaminds Retrol Steam Engine Model Kit, 1.9cc Atkinson Cycle Four-Stroke Differential Opposed Piston Gas Engine Model with Wooden Base, Physics Science Education Toys for Adults

⚙️【Atkinson Cycle Precision】Experience the unique mechanics of a 1.9CC differential opposed piston engine with air-cooled design. Built from brass, stainless steel, and wood for a retro-industrial aesthetic (15x12x10cm) 【Premium Craftsmanship】Durable CNC-machined components ensure smooth operation. Features an adjustable carburetor oil needle to optimize fuel-air mixture for smooth operation 【STEM Learning Tool】Demonstrates four-stroke combustion, Atkinson cycle efficiency, and mechanical engineering principles. Ideal for classrooms, workshops, or hobbyists aged 16+ to explore thermodynamics and engine dynamics 【Ready-to-Operate】Pre-assembled for easy startup. Follow simple steps: connect fuel lines (95-octane gas not included), install 3x AA batteries (4.5V), and ignite via flywheel rotation. Includes troubleshooting tips for carburetor adjustments 【Vintage Desk Centerpiece】Combines functionality with decorative charm. The polished brass/stainless steel construction and wooden base make it a striking addition to offices, shelves, or model dioramas