O.S. Engine OSMG1972 70SZ-H Ring 3D Engine Unit  [OSMG1972]

Step Up Thrust with the O.S. Engine OSMG1972 70SZ-H

Pilots seeking a clean swap into .61 mounts will appreciate how the O.S. Engine OSMG1972 70SZ-H Ring 3D Engine slots in without major modifications. It is intended to give reliable power for dynamic 3D flying and precision F3C work.

Solid Construction for Competitive Use

Designed for the stresses of sport and contest flying, the engine adds a front mounting lug to improve rigidity. Combined with front and rear crankshaft bearings, this reduces internal wear under heavy throttle cycles.

Accurate Throttle Tuning with Three Needles

The three-needle carburetor allows careful trimming across the rev range. Reference marks on the throttle assembly help you record ideal settings and return to them after servicing or adjustments.

Enhanced Thermal Management

Large head fins and extra webbing at the crankcase front work together to move heat away from critical areas. That design helps the motor stay cooler during extended runs or demanding flight sequences.

The 70SZ-H is a pragmatic choice for pilots after more punch without major airframe rework, combining dependable construction with tunable performance.