RCXTechPro SEMTO ST-NF2 7.0cc Working Engine Model Kit – Mini Inline Double-Cylinder 4-Stroke Air-Cooled IC Engine, DIY Assembly Science Kit for Adults & Collectors

• 🔧【Build Your SEMTO Engine Model Kit】DIY the SEMTO ST-NF2 L2 engine to explore the internal structure and real-world mechanics of a double-cylinder four-stroke engine in action. Product Dimensions: 11.2 x 9 x 9.2cm.
• ⚙️【Smooth & Powerful Operation】Features an asynchronous crankshaft, dual belt-timed pulleys, and a short rocker arm—achieving up to 16000rpm with stable, high-speed performance.
• ⚡【Realistic Look & Easy Tuning】Styled with thunderbolt-inspired design, realistic finishes, and an upgraded signal carburetor for sensitive throttle response and quick adjustments.
• 🏫【Great for Teaching & Display】Perfect for classrooms, demonstrations, and mechanical displays. Widely used by educators to teach engine principles in an engaging, hands-on way.
• 🎁【Premium Gift for Engine Lovers】Housed in a high-end metal box, this model is an ideal gift for mechanical hobbyists—great for holidays, birthdays, or anyone who loves building engines.

Specifications: .Color: Red .Material: Metal .Brand: SEMTO ENGINE .Model: ST-NF2 .Form: Kit Version .Engine Type: Nitro Interal Combustion Engine Model .Valve Mechanism: SOHC .Displacement: 7.0 (3.5*2)cc .Cylinder: Inline Double-cylinder .Stroke: Four Stroke .Cyilinder Diameter: 16.6mm .Stroke: 17.00mm .Speed: 4000-16000rpm .Power: 0.6ps .Cooling Mode: Air Cooling .Lubrication Mode: Mixed Oil Lubrication (add grease) .Starting Mode: Electric .Ignition Mode: Ignition Modules (Not Included) .Type of Electric Plug: F-type Four-stroke Electric Plug (Not Included) .Starting Voltage: 7.4V 2S Li battery (Not Included) .Fuel Type: 20-25% Nitro Fuel .Product Dimensions: 11.2 x 9 x 9.2cm .Product Weight: 535g .Package Dimensions: 14.5 x 11 x 11.2cm .Package Weight: 1000g .Packing: Graphic Carton .Ages: 16+ Package Including .1*Engine Model Kit .1*Instructions