O.S. .55 HZ-H Hyper Ringed Competition Helicopter Engine

[OSM15630]
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This is the O.S. 55HZ Hyper Ringed Helicopter Engine with the 40L Carburetor. The O. S. 55HZ-H Hyper Ringed Heli engine is cause to rejoice for 3D heli flyers! The 55-HZ-H Hyper Ringed engine cranks out optimum power with a minimum of space!

FEATURES:
  • Ideal for 3D flight-power equal to .60 size heli engines
  • Same mounting bolt pattern and silencer size as the OS 50SX-H Hyper
  • Dual needle 40L carburetor with four arm throttle lever for use with a variety of servo brands
  • Two year limited warranty through manufacturer beginning at the date of purchase

SPECIFICATIONS:

  • Displacement: 0.55 cu in (8.93 cc)
  • Bore: 0.91 in (23 mm)
  • Stroke: 0.85 in (23.5 mm)
  • Practical rpm: 2,000-17,000
  • Weight: 14.39 oz (408 g)

This product was added to our catalog on December 4, 2009.

Don Barrow/ swashnut
Verified Owner
this new 55 engine from OS is by far more powerful than the 50 hyper. 13.5 degrees pitch no worries. easy to tune runs very smooth with power to spare. all you 50 sized 3D addicts need to try this one for yourself to see what real power is all about! I have two outrage velocity 50's with this motor and also installed a flybarless system from Skukum and i can no longer bog the head. This motor seems to make its best power around 16500 rpm. i highly recommend a good quality tuned pipe to compliment this engines power curve.
KEVIN KRAPE
Verified Owner
ALL I CAN SAY IS THIS MOTORS HAS LOTS OF POWER IN MY JS 50 3D UPGRADED FROM HYPER 50 12 DEGREES PITCH CLIMBS LIKE A ROCKET ITS WORTH EVERY PENNY!
JAMES FARR
A lot of power more power than hyper 50, but bearings don't last very long.

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