SEMTO ST-NF2 DIY 2-Cylinder 4-Stroke Nitro Engine Model Kit – Working Desktop Internal Combustion Engine
Ignite Your Inner Mechanic: Build a Real Engine from Scratch
Have you ever dreamed of understanding exactly how an engine breathes, fires, and roars? The SEMTO ST-NF2 (formerly OTTO MOTOR FS-L200AC) is your gateway into the fascinating world of mechanical engineering.
This isn't just a static display piece; it is a fully functional, 2-cylinder, 4-stroke nitro engine that you build with your own hands. Born from a passion to make precision engineering accessible to students and hobbyists, this kit offers the premium quality of high-end models at an entry-level price. Whether you are a college student on a budget or a veteran petrolhead looking for a relaxing weekend project, the ST-NF2 delivers the thrill of internal combustion right to your desktop.
Why Choose the SEMTO ST-NF2?
1. The Ultimate DIY Experience
There is no satisfaction quite like hearing an engine roar to life that you assembled piece by piece. This kit walks you through the internal structure of an engine, transforming a pile of metal parts into a mechanical masterpiece. It is the perfect bonding project for fathers and sons, or a meditative challenge for the solo builder.
2. High-End Precision at an Entry-Level Price
Co-branded with Toyan, this engine retains the high-precision CNC machining and oxidation coloring of premium models but simplifies the structure to make it affordable. You get a stunning, compact, and lightweight engine without the heavy price tag.
3. Striking "Thunderbolt" Aesthetics
Dressed in a sporty red and silver color scheme, the ST-NF2 looks fast even when it's standing still. The meticulous surface finish and realistic appearance make it a stunning piece of mechanical art for your office, garage, or classroom.
4. The Perfect STEM Teaching Aid
Forget textbooks; learn by doing. This engine is widely used by teachers and schools to demonstrate physical and mechanical principles. It visually explains valve timing, crankshaft rotation, and the 4-stroke cycle in a way that diagrams never could.
Technical Highlights: Engineering Excellence
- Dual Synchronous Belt Pulley: The timing structure utilizes a dual belt system, significantly reducing the risk of gear jumping during high-speed operation (up to 16,000 RPM).
- Optimized Carburetor: Tuning a nitro engine can be tricky, but the brand-new single carburetor design allows for easier adjustments and a more sensitive throttle response.
- High-Torque Electric Start: Equipped with a robust 480 brushed DC motor, starting the engine is smooth and convenient. No more frustrating pull-starts.
- Precision Rocker Arms: The short rocker arm design ensures accurate valve switch operation, maximizing efficiency and performance.
Specifications
- Model: SEMTO ENGINE ST-NF2 (Compatible with OTTO MOTOR FS-L200AC)
- Type: Nitro Internal Combustion Engine (Kit Version)
- Cylinders: Inline Double-Cylinder
- Stroke: Four-Stroke
- Displacement: 7cc (3.5cc x 2)
- Speed: 4000 - 16000 RPM
- Power: 0.6ps
- Bore / Stroke: 16.6mm / 17.00mm
- Cooling: Air Cooling
- Starting Method: Electric (480 Brushed Motor)
- Fuel: 20-25% Nitro Fuel
- Dimensions: 11.2 x 9 x 9.2cm
- Weight: 535g
- Material: CNC Aluminum Alloy & Alloy Steel
Required to Run (Not Included):
- 2x Ignition Modules (or glow plug driver)
- 7.4V 2S LiPo Battery
- Nitro Fuel
- Fuel Line & Tank
Usage Scenario: The First Start
It’s Saturday afternoon. You’ve spent the morning assembling the camshafts and setting the timing belts. The engine sits on your workbench, gleaming in red and silver. You connect the fuel line and the 2S battery.
You press the start button. The electric motor whirs, spinning the flywheel. Pop... Pop... VROOM! The twin cylinders catch fire, settling into a rhythmic, mechanical idle. The smell of nitro fills the air. You blip the throttle, and the engine revs instantly to 10,000 RPM. You didn't just buy a model; you built a machine.
Customer Support
Note: Orders after Dec 12, 2022, feature the updated SEMTO logo. The engine mechanics remain identical to the OTTO version.
For assembly guides, spare parts, or technical support, please contact our expert team:service@helloworld7.com
