O.S.Speed 91HZ-R 3D Helicopter Engine Labor23 TORQ 15 the BOXER has cutting edge

the BOXER has cutting edge software fit for its class-leading hardware

AZ Tail Blade features a unique design that has been carefully and repeatedly tested to position the perfect propeller center of gravity

which is specially manufactured according to the requirements of Miniature Aircraft

000cSt which dampens the servo saver well and helps to control any possible "head shake

9 or later

O.S.Speed 91HZ-R 3D Helicopter Engine Labor23 TORQ 15 the BOXER has cutting edgeFollowing 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. Introducing the 91HZ R Speed Engines based on the 91HZ R, factory tuned at the O. S. Japan facilities and guaranteed to blow you away! Features: Lightweight, machined heat sink head Big bore carburettors best suited for the intended use (F3C or 3D) Best precision advanced exhaust cylinder