O.S. 55HZ-R DRS Ringed .55 Helicopter Engine

OS Engines
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OSMG1957
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The 55HZ-R DRS engine is designed to meet the unique demands of F3C competition and 3D flight! 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...

The 55HZ-R DRS engine is designed to meet the unique demands of F3C competition and 3D flight!

  • 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 a sensor of Futaba®'s GY-701 governor, to insure more stable flight
  • Cranks out 2,000-20,000 rpm
Type: 

Nitro Equipment

Vendor: 

OS Engines

SKU: 

OSMG1957

Weight: 

4.0 lb


Product Spare Parts

Customer Reviews

Based on 12 reviews
100%
(12)
0%
(0)
0%
(0)
0%
(0)
0%
(0)
J
Jimmy M.
Goblin500 Nitro New Build

Installed the OS 55 in my new Heli build. I have only run 2 tanks of Cool power 30% thru. so far at only 1/2 throttle I have only been electric.so far, learning something new at every step of the way that's the great thing about this hobby.
My setup will be for open air and sport flying. with some mild 3D

J
Juan C.
OS quality and ease of tuning.

I chose OS for their reliability and ease of tuning for my Tron and Oxy Nitro helis. I’ve always used OS in my helis.

A
Andre L.
Just Perfect

Well made ! Can wait to ear it scream !

P
Pedro R.
Great Engine!

This is by far the best motor over all. Easy to tune and has a lot of power for 3D flights.

J
Juan C.
OS55

Always used OS. This engine is reliable and easy to tune.

C
Craig M.
Customer service

I’ve been dealing with Helidirect for quite some time now.
I am not a patient man lol. When I order something I want it now.
Helidirect has always exceeded my expectations with their attention to detail and expeditious delivery.
I’ve never once gotten an email days later saying somethings back ordered or that someone’s dropped the ball. This company is on point and beyond.
Thank you all for your amazing service.

b
barry w.

so far so good haven't had time to go and test it yet . but it starts right up and sounds good

R
Ray L.
Great motor as always with O.S.

Runs great as always with the O.S. motors.

D
Dave K.

I replaced a 55hz hyper with this engine. I'm finding the breaking in this engine quite joyful. Seems to hold consistent smoke and already makes great power.

P
Peter V.

I selected this engine for my Aligne TRex 600 Nitros because I wanted plenty of power to being able to handle 3D flying and this is powerful engine with plenty of torque and a very smooth operation. I am very pleased with my purchase.

Customer Reviews

Based on 12 reviews
100%
(12)
0%
(0)
0%
(0)
0%
(0)
0%
(0)
J
Jimmy M.
Goblin500 Nitro New Build

Installed the OS 55 in my new Heli build. I have only run 2 tanks of Cool power 30% thru. so far at only 1/2 throttle I have only been electric.so far, learning something new at every step of the way that's the great thing about this hobby.
My setup will be for open air and sport flying. with some mild 3D

J
Juan C.
OS quality and ease of tuning.

I chose OS for their reliability and ease of tuning for my Tron and Oxy Nitro helis. I’ve always used OS in my helis.

A
Andre L.
Just Perfect

Well made ! Can wait to ear it scream !

P
Pedro R.
Great Engine!

This is by far the best motor over all. Easy to tune and has a lot of power for 3D flights.

J
Juan C.
OS55

Always used OS. This engine is reliable and easy to tune.

C
Craig M.
Customer service

I’ve been dealing with Helidirect for quite some time now.
I am not a patient man lol. When I order something I want it now.
Helidirect has always exceeded my expectations with their attention to detail and expeditious delivery.
I’ve never once gotten an email days later saying somethings back ordered or that someone’s dropped the ball. This company is on point and beyond.
Thank you all for your amazing service.

b
barry w.

so far so good haven't had time to go and test it yet . but it starts right up and sounds good

R
Ray L.
Great motor as always with O.S.

Runs great as always with the O.S. motors.

D
Dave K.

I replaced a 55hz hyper with this engine. I'm finding the breaking in this engine quite joyful. Seems to hold consistent smoke and already makes great power.

P
Peter V.

I selected this engine for my Aligne TRex 600 Nitros because I wanted plenty of power to being able to handle 3D flying and this is powerful engine with plenty of torque and a very smooth operation. I am very pleased with my purchase.