O.S.Speed 91HZ-R 3D Helicopter Engine Raw 500 Parts 18T Pinion - Goblin 570

18T Pinion - Goblin 570 Sport

2 x Double Sided Tapes

similar to the nitro model

Main gear: 170 T

07 sec / 60° @ 6

O.S.Speed 91HZ-R 3D Helicopter Engine Raw 500 Parts 18T Pinion - Goblin 570Following 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