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OS 91 HZ Non-Pumped
SKU
ENG-OS91HZ
With back-to-back FAI F3C World Championships in 2005 and 2007, the 91SZ-H was a winner by anyone's standards. Now there's the 91HZ – a 91SZ-H redesigned with the help and advice of some of the world's top pilots. It offers the tuning ease and performance consistency of the multi-time world championship winning engine and design innovations that promote improved cooling and a tighter compression seal!
The new narrow profile of the head helps the 91HZ fit completely inside almost all cooling shrouds without cutting or losing cooling power! Two heat sinks – one on the head, another on the crankcase – allow airflow to carry away heat and maintain performance while better overall balance reduces engine noise and promotes smoother, stronger performance.
The newly designed piston and crankshaft reduce vibration even further and allows the engine to develop more stable torque over entire r.p.m. range. The new 61B carb takes consistency to the next level. Dependability features start with an insulating ring which prevents crankcase heat from affecting carb settings. A generous use of O-ring seals – two on the main needle, one on the rotor – prevents air leaks and power fluctuations making for a great engine for F3C as well as 3D flying.
Specifications
- Displacement: 14.95 cc
- Bore: 27.7 mm
- Stroke: 24.8 mm
- Practical rpm: 2,000-16,000
- Output:3.4 hp @ 15,000 rpm
- Weight: 618 g
This engine includes 1x 61B carburetor, in-flight needle valve adjustment and 1 x OS #8 glow plug as packaged.
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