MAX-105HZ-R 17.17cc 2-Stroke Heli Engine

The O.S. Max 105HZ-R is a high-performance nitro engine designed specifically for 90-size (700-class) radio-controlled helicopters, offering enhanced power and reliability for both 3D aerobatic and sport flying.

Key Features:

• Displacement: 17.17 cc (1.048 cu.in.)
• Bore: 29.0 mm (1.142 in.)
• Stroke: 26.0 mm (1.024 in.)
• Output: 3.8 PS (3.75 HP) at 15,000 RPM
• Practical RPM Range: 2,000 to 16,500 RPM
• Weight: 608.4 grams (21.46 oz.)

Design and Performance:

• Demand Regulator System (DRS): Ensures consistent fuel flow regardless of the helicopter's attitude, providing reliable performance during extreme maneuvers.
• Compact Design: Offers a 15% increase in displacement over standard .91-class engines while maintaining the same mounting dimensions, facilitating easy installation without modifications.
• Cooling Efficiency: Features a machined, blue-anodized heatsink head that effectively dissipates heat, ensuring optimal operating temperatures.
• Velocity Stack: Includes a large velocity stack on the 61G carburetor to channel cool, undisturbed air into the engine, enhancing power output.

Compatibility:

• Mounting: Shares the same mounting pattern as conventional .91-class engines, allowing for straightforward upgrades.
• Silencer: Compatible with the O.S. PowerBoost 105 silencer for optimal performance; also compatible with conventional 90-size silencers.

Additional Information:

• Fuel: Designed for nitro-methane-based fuels; the number of head gaskets can be adjusted based on nitro content for optimal tuning.
• Glow Plug: Supplied with an O.S. No.8 glow plug.
• Installation: Features a beam mount design with precision-machined mounting lugs for secure installation.

The O.S. Max 105HZ-R engine is engineered to deliver exceptional power and reliability, making it a preferred choice for RC helicopter enthusiasts seeking superior performance in demanding flight conditions.