O.S.Speed 91HZ-R 3D Helicopter Engine Raw 500 Parts Includes: 1 x Aluminium Center

Includes: 1 x Aluminium Center Hub

Front Tail Pulley - 34t

07 sec / 60° @ 6

servos (micro cyclic & mini tail)

Weight (grams): 830g

O.S.Speed 91HZ-R 3D Helicopter Engine Raw 500 Parts Includes: 1 x Aluminium CenterFollowing the popularity of the 91HZ R with on demand regulator, O. S. has now taken high performance, high speed helicopter engines to the next stage of evolution. Features: Lightweight, machined heat sink head Big bore carburettors best suited for the intended use (F3C or 3D) Best precision advanced exhaust cylinder timing (for F3C or 3D) Newly designed combustion chambers, shaped to match the big bore carburetors and advanced exhaust cylinder