Call Us:  408-834-2423    Email Us:
Quick Find:    
Elec. Helis & Parts
Nitro Helis & Parts
Heli Combos
Electric Motors
Engines & Parts
 - 50 Engine Accessories
 - NovaRossi and Parts
 - OS 105HZ
 - OS 50 SX-H and PARTS
 - OS 55 and PARTS
 - OS 91 HZ and PARTS
 - YS 120SR/120SRX and PARTS
 - YS 50ST & 56SR
 - YS 60SR
 - YS 91SR/91-3DS/YS91SRX and PARTS
 - YS96SRX and PARTS
Tools & Misc.
Canopies and Fuselages
Nitro Accessories
Wires and Connectors
Job Opportunities
Comments more
Write ReviewWrite a review on this product!
Links more
Customer Service more
Create a Support Ticket
View a Support Ticket

  Top » Catalog » Engines & Parts » OS 55 and PARTS » OS-5517

O.S. 55HZ-R DRS Ring 40L-R



O.S. 55HZ-R DRS Ring 40L-R

This is the Limited Edition OS 55HZ-R DRS Ringed Helicopter Engine
with the DRS (Demand Regulator System).

FEATURES: DRS system delivers fuel to the regulator under constant pressure
for precise fuel delivery throughout the entire tank from full to
Mounting position of DRS is perfectly in line with the carb for
consistent operation in all attitudes of flight
Same mounting bolt pattern as the OS 50SX-H Hyper
Dual needle 40L-R carburetor allows independent adjustment of idling,
hovering and high speed with four arm throttle lever for use with
a variety of servo brands
HZ Hyper low profile six fin cylinder head
Two year limited warranty through Hobby Services beginning at the
date of purchase

INCLUDES: OS 55HZ-R DRS Ringed Helicopter Engine, #8 Glow Plug, Check Valve and
Instruction Manual

REQUIRES: 10% to 30% nitro Fuel with at least 18% lubricant (Helicopter Mix)
Fuel filter and starting equipment

SPECS: Engine;
Displacement: 0.55 cu in (8.93cc)
Bore: 0.91" (23mm)
Stroke: 0.85" (23.5mm)
Practical RPM: 2,000-20,000 RPM
Weight: 15.1oz (429g)
Carburetor Settings:
High Speed Needle Valve, Approximately two turns open from fully
closed position
Idle Mixture Control Screw, Factory set at center, turn right to
richen or left to lean mixture
Medium Speed Needle Valve, One turn open from fully closed, adjust
only after setting high speed needle and idle mixture screw, do
not turn more than 90° right or left
Distance/top of cylinder head-bottom of mounting tabs: 2.8" (72.6mm)
Distance between mounting holes same side: 0.68" (17.5mm)
Distance between mounting holes opposite side: 1.73" (44mm)
Distance between muffler mounting holes: 1.4" (37mm)
Cylinder Head Diameter: 1.8" (47mm)
Distance/bottom of crankcase to top of cylinder head: 3.6" (90.9mm)
Distance from center of engine to front bearing: 2.03" (51.6mm)
Distance from center of engine to end of Crankshaft: 3.2" (82.6mm)
Distance from center of engine to backplate bolt: 0.98" (25mm)
Distance from center of engine to throttle lever: 1.5" (38mm)

jxs 12/23/10
BOX DIMENSIONS: 4.88" W. X 4.88" H. X 6.25" L.

Extra Info

There are currently no product reviews
Write a review on this product!

Extra Info
This product was added to our catalog on Tuesday 15 February, 2011.
Notify me of updates to O.S. 55HZ-R DRS Ring 40L-R
Tell someone you know about this product.

 Add to Wish List 
 $399.99  Quantity:        
Customers who bought this product also purchased
Shopping Cart more
0 items
Wishlist more
My Wish List [+]
Wish List Help [?]
Specials more

108-105 10x19x5 Clutch Bearing
 $12.00  $6.00 

107-075 Link rod, 2.5x75mm
 $4.00  $2.00 

106-803 Washer, 8x1.0mm
 $2.00  $1.00 
KX022003 T-REX 100S Combo
KX022003 T-REX 100S Combo
 $89.00  $49.00 

106-810 Fuel Tank Stopper Grommet
 $4.00  $2.00 
Notifications more
NotificationsNotify me of updates to O.S. 55HZ-R DRS Ring 40L-R