105HZ-R DRS 1.05 Helicopter Engine (OSMG1961)

Designed for 90-size RC helicopters, this high‑power engine delivers serious torque and quick throttle response, packing about 1.05cc of displacement into the space of a standard .90 engine for roughly 15% more power and punch in everyday 3D flights.

Key features include a machined blue anodized heatsink head for lightweight cooling, a larger venturi to push more air into the carburetor, and a pressurized DRS (Demand Regulator System) that maintains consistent fuel flow regardless of the helicopter’s attitude. It’s built to fit the .90 mounting pattern, making it a straightforward upgrade for pilots seeking strong, reliable power and smooth fueling on demanding flights.