Unleashing the Potential of Your Helicopter: The O.S. Engine 70SZ-H
For RC helicopter enthusiasts looking to elevate their flying experience, the O.S. Engine 70SZ-H Ring 3D Heli Engine is a game-changer. Designed with precision and performance in mind, this engine fits seamlessly into the space of a .61 engine, offering a straightforward upgrade path without the need for complex modifications or gearing changes. Whether you're engaging in 3D aerobatics or competing in FAI F3C events, the 70SZ-H provides the power and reliability needed to excel.
Engineered for Precision and Power
The O.S. Engine 70SZ-H is specifically developed to meet the rigorous demands of competitive flying. Its design ensures stability during extreme maneuvers, thanks to an additional mounting lug on the front of the crankcase. This feature, coupled with a front and rear ball-bearing supported crankshaft, reduces friction and wear, enhancing the engine's durability.
Advanced Carburetor Design
One of the standout features of the 70SZ-H is its three-needle carburetor, allowing for exceptionally precise adjustments. This level of control is crucial for pilots who need to fine-tune their engines for optimal performance. The throttle assembly includes reference marks, making it easy to restore finely tuned settings after maintenance.
Optimized Cooling for Sustained Performance
Heat management is critical in maintaining engine performance, especially during demanding flight conditions. The 70SZ-H addresses this with a large cylinder head that offers generous cooling fin area. Additionally, increased webbing on the crankcase front further improves heat dissipation, ensuring the engine remains cool under pressure.
Specifications
- Displacement: 0.702 cu in (11.5 cc)
- Bore: 1.016 in (25.8 mm)
- Stroke: 0.866 in (22.0 mm)
- Practical RPM: 2,000-18,000
- Output: 2.5 hp @ 16,000 rpm
- Weight without Muffler: 19.5 oz (553.5 g)
- Requires: Muffler & fuel
The O.S. Engine 70SZ-H is ideal for RC helicopter pilots seeking enhanced performance without extensive modifications. From hobbyists to competitive flyers, its precision engineering and power make it a top choice for those serious about their craft.
