Unleashing the Potential of the O.S. Engine 25FX
The O.S. Engine 25FX Non-Ringed with Muffler is a testament to engineering excellence tailored for RC aviation enthusiasts. This model, identified by its part number OSMG0525, stands out in the category of airplane engines with its robust design and advanced features that cater to both sport and aerobatic flying.
Performance Features That Stand Out
At the heart of the O.S. Engine 25FX is its Schnuerle porting design, which optimizes airflow for enhanced combustion efficiency. This feature, coupled with a twin ball bearing-supported crankshaft, ensures smooth operation and longevity. The engine's non-ringed ABN construction further contributes to its lightweight nature while maintaining durability.
Built for Versatility and Power
Designed to accommodate both muffler and tuned pipe setups, the O.S. Engine 25FX offers flexibility for different flying styles. Whether you're engaging in pattern flying or sport flying, this engine can handle prop sizes ranging from 9x5 to 10x5, allowing for a wide practical RPM range of 2,500 to 19,000 RPM. This adaptability makes it a favorite among seasoned pilots looking to push their aircraft to new limits.
Practical Design Considerations
With a compact size, the engine measures just 75.6mm in length and weighs 248g, making it an ideal choice for various aircraft models without adding unnecessary bulk. The side exhaust design not only enhances performance but also simplifies installation in tight spaces.
Specifications
- Displacement: 4.07cc (.2485 cu in)
- Bore: 18.0mm (.708")
- Stroke: 16.0mm (.630")
- Horsepower: .84 BHP at 18,000 RPM
- Weight: 248g (8.8oz) without muffler
- Practical RPM Range: 2,500 - 19,000 RPM
- Recommended Props: 9X5, 9X6, 9.5X5, 10X4, 10X5
The O.S. Engine 25FX is perfect for hobbyists who demand reliability and performance. Its adaptability makes it suitable for both casual flyers and competitive pilots seeking to enhance their aircraft's capabilities.
