O.S. Engine OSMG0650 120AX Performance Airplane Powerplant  [OSMG0650]

Refine Aerobatics with Compact Extra Displacement

Pilots focused on 3D and sport aerobatics will find the O.S. Engine 120AX fits where a .91 once lived but supplies around 20% more displacement. That added capacity helps the airframe accelerate and handle larger props without a heavy penalty.

Designed for Durable, Even Heat Dissipation

The 120AX weighs only 21 ounces (650 grams), so it keeps the model nimble while giving more oomph. Its angular head boosts surface area to improve heat shedding, supporting consistent performance over longer flights.

Included Items and Recommended Setup

Built with CCD mounting geometry, the 120AX installs into existing .91 positions. It ships with a #8 glow plug, a 70D dual-needle carburetor, and an E-5020 Power Box muffler plus two adapters. Common prop choices are 14x10 APC and 15x6 APC depending on flying preference.

Whether you fly 3D or fast sport routines, the 120AX is a practical step up for hobbyists wanting more punch without heavy modifications to the airframe.