Model Application: Ideal for 3D, Precision and Sport flying Mounting Application: Mounts in same space as the .91FX (actual mounting dimensions vary slightly, see SPECS) Internal Construction: Steel piston ring and liner, aluminum piston Muffler: E-5020...

This is the O.S. Max .37 SZ-H Ring Helicopter Engine. (Two year limited warranty) FEATURES: Premium performance for 30-sized machines, from extreme aerobatics to stable hovering Same mounting pattern and muffler dimensions as the .32 SX-H, for ...

Plentiful power for sport and aerobatic aircraft!. Ease, dependability and performance are what make engines popular — and they're also three good reasons why the 46AXII has become an instant flyer favorite. Lightweight and low maintenance, the 46AXII is as good a choice for easy sport flying as ha...

For over-the-top flying excitement, the 50SX-H Ringed Hyper engine is the clear favorite! The Hyper version weighs less than the 50SX-H, but delivers more horsepower for higher rotor speeds. Actually mounts in the same space as a .30-size application. The 60LH carburetor features 1.5 mm more bore...

This is the O.S. Max .55AX ABL BB Model Airplane Engine with Muffler. Ideally suited to a variety of R/C aircraft including trainer, sports aerobatic, and scale types.*FEATURES: Redesigned remote needle holder is separate bracket, not part of backplate, sa...

Same mounting dimensions as the O.S. Max .61FX Advanced Bi-Metallic Liner process uses a double layer of plating material rather than one thick layer. This helps the metal bond to the cylinder and makes the plating more durable. Also, the plating pro...