Backorder | Next Shipment October 2022
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5 out of 5 Customer Rating

55HZ-R DRS Ringed .55 Helicopter Engine

Item No.
OS Engines - OSMG1957
$474.99
Backorder | Next Shipment October 2022
Brand Logo
5 out of 5 Customer Rating

55HZ-R DRS Ringed .55 Helicopter Engine

Item No.
OS Engines - OSMG1957
$474.99
Product $474.99
Add Ons
Estimated Total: $474.99

55HZ-R DRS Ringed .55 Helicopter Engine

Item No.
OS Engines - OSMG1957
5 out of 5 Customer Rating
Product $474.99
Add Ons
Estimated Total: $474.99
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Product Details

icon-box
In The Box
  • (1) 55HZ-R DRS Ringed Helicopter Engine
  • (1) #8 Glow Plug
  • (1) Check Valve
  • (1) Product manual
icon-how-to
Needed to Complete
  • 10% to 30% nitro Fuel with at least 18% lubricant (Helicopter Mix) Fuel filter and starting equipment

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.

Product Specifications

Manufacturer # 15650
Product Height 3.6 in (90.9 mm)
RPM Range 2,000 - 20,000 rpm
Product Length 3.0" (76.6mm) from backplate to front bearing
Displacement 0.55 cu in (8.93 cc)
Cylinders Single
Product Width 2.0 in (52 mm) at mounting tabs
Total Weight 15.13 oz (429 g)
Crankshaft Threads UNF1/4-28
Bore 0.91 in (23 mm)
Crankshaft Type Threaded
Power Type Glow
Stroke 0.85 in (23.5 mm)