SEMTO ST-NF2 Mini Inline Twin Engine Model Kit, 7.0cc Four-Stroke Air Cooling Metal Engine, DIY Mechanical Hobby and Engineering Display

• 🔥【High Power Engine Model,Four Stroke Operation,Dynamic Mechanical Performance】This miniature internal combustion engine model features a 7.0cc displacement inline twin-cylinder layout delivering strong mechanical output and smooth four-stroke operation for realistic engine simulation.
• 🛠️【Full Metal Precision Engineering,CNC Machined Components,Stable Mechanical Operation】Built from high-quality metal materials using precision CNC machining, the engine model ensures excellent durability, stable movement, and authentic mechanical detailing for advanced hobby assembly.
• ⛓️【Dual Belt Timing System,Improved Stability,Reduced Mechanical Wear】The dual synchronous belt pulley timing structure improves transmission stability and reduces wear during high-speed rotation, enhancing operational reliability and mechanical lifespan.
• ⚡【Electric Start Compatibility,High Torque Motor Support,Wide Speed Range】Supports electric start with compatible DC motor system and operates within 4000-16000rpm speed range, providing responsive start performance and smooth mechanical rotation.
• 🎁【Mechanical Hobby Kit,Educational Demonstration,Premium Collector Piece】Designed for mechanical hobby builders and engineering education, this DIY engine assembly kit serves as both a learning tool and high-end mechanical display model. Starting and ignition modules are required separately.

Product description Specifications: .Color: Red .Material: Metal .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: 14+ Package Including .1*Engine Model Kit .1*Instructions Directions Included