OS Max OS Max 15650 55HZ-R DRS Ringed .55 Helicopter Engine

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.

O.S. Two Year Limited Warranty
Includes: #8 plug, 40-LR carb & check valve.
2-year limited Hobby Services warranty.
The Demand Regulator System (DRS) uses pressure to consistently deliver the optimal air-fuel mixture to the engine — regardless of the heli’s attitude.
Two needles on the carburetor precisely adjust middle and high speeds.
A hole in the cover plate allows for mounting an rpm sensor for the Futaba® GY-701 governor or CGY750 gyro, ensuring precise rpm control.

Specifications

Bore
0.91 in (23 mm)
Crankshaft Threads
UNF1/4-28
Crankshaft Type
Threaded
Cylinders
Single
Displacement
0.55 cu in (8.93 cc)
Power Type
Glow
Product Height
3.6 in (90.9 mm)
Product Length
3.0″ (76.6mm) from backplate to front bearing
Product Width
2.0 in (52 mm) at mounting tabs
RPM Range
2,000 – 20,000 rpm
Stroke
0.85 in (23.5 mm)
Total Weight
15.13 oz (429 g)