O.S. Engines

55HZ-R DRS Ringed

State-of-the-art power for serious heli pilots!

The 55HZ-R DRS Ringed delivers state-of-the-art power for serious heli pilots! It includes the Demand Regulator System for outstanding run consistency and a built-in mount for Futaba GY701 and CGY750 rpm sensors. Two needles on the included 40-LR carb let pilots precisely adjust middle and high speeds.

Displacement: 0.55 in3 (8.9 cc), RPM Range: 2,000-20,000, Output: 2.1 hp @ 17,000 rpm, Weight: 15.1 oz (429 g)
Requirements: 10%-30% nitro heli fuel with a minimum 18% lubricant content, Starting equipment