O.S.® Engine 91HZ-R Heli Engine

Based on the celebrated, multi-time FAI World Champion 91HZ series, the 91HZ-R sets new standards for heli engines. Its specially designed "on demand" pressurized regulator system is mounted in-line with the included 61E-R carb. Fuel is consistently delivered, regardless of attitude or throttle changes. The end result is an engine that performs equally well on a full or empty fuel tank. Precise mixture controls -- in the form of high- and mid-speed needle adjustment valves -- help make it ideal for all styles of flying. No matter the application, rest assured that the 91HZ-R will never lack in fuel -- or performance!

OSMG1973
Displacement: 0.91 cu in (14.95 cc)
Output: 3.4 hp @ 15,000 rpm
Practical RPM: 2,000-16,000
Weight: 22.1 oz (625 g)
Includes #8 glow plug, check valve, 0.1 mm & 0.2 mm head gaskets.

Already own an earlier 91HZ engine model? Enjoy all the benefits the 91HZ-R has to offer with the easy-to-install Conversion Kit (OSMG4039). It includes:

• 61E-R carburetor with pressurized regulator system, high- and mid-speed needle adjustment valves and an idle control mixture screw.
• Rear cover plate with pressure nipple and rubber O-ring seal.
• Check valve.
• Instructions.

For complete information about the 91HZ-R engine, visit its product page at http://www.osengines.com/engines/osmg1973.html

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Category:

Science & Technology

Tags:

• RC
• R/C
• Radio Control
• Remote Controlled
• Hobbico
• OS
• O.S.
• O.S. Engine
• heli
• helicopter
• engine
• FAI
• glow
• nitro
• Great Planes
• radio controlled

[420choky]

isnt that like the ys56sr design ?

[kalufsp]

@Pilotsofer

No, you will not. The conversion kit is the backplate, carb with regulator attached and a check valve. You simply remove your old carb and bolt the new components in place.

[Pilotsofer]

If I convert my engine will I have to re-break-in my engine?