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Hi All,

The first thing i would like to say in my blog is a huge thank you to Will James, for permitting me to report on all the Helli news and activity from the UK.

I will try to get on and update the blog as often as i can or when something a "little special" pops out the wood work.
Ill be keeping you up to date with the UK competition scence throughout next year, as this is my first competitive year also so it should be an intereting ride.
I also plan to try to make most of the fun fly's and get some coverage of those but with so many now filling the UK calander its going to be a busy year.

Hope you enjoy.
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OS have been at it again, the new 3D!!! - OS91HZ-PS

Posted 11-24-2009 at 02:56 PM by lex7919


This is the O.S. .91HZ-PS 3D Helicopter Engine with Pump and 61B-PII Carburetor features a revised pump diaphram for improved fuel regulation and consistency.
FEATURES: PD-08 pump works with a matched 61B-PII carburetor and integral regulator attached to carburetor to deliver a steady fuel supply at any altitude. Short rectangular heatsink can be entirely enclosed inside cooling shroud to lower operating temperatures. Newly designed piston and crankshaft further reduces vibration and improves torque stability over entire RPM range. Two year limited warranty through manufacturer beginning at date of purchase

INCLUDES: O.S. .91HZ-PS 3D Helicopter Engine with Pump, 61B-PII Carb, #8 Glow Plug, instruction manual
REQUIRES: Fuel: 15% heli mix Glow igniter, glow plug wrench and field equipment
Displacement: 0.91 cu in (14.95 cc)
Bore: 1.09 in (27.7mm)
Stroke: 0.98 in (24.8mm)
Practical RPM: 2,000 16,000
Power Output: 3.4 hp @ 15,000 RPM
Weight: 1.4 lb (635g)
Height from crankcase bottom to top of cylinder head: 4″ (103mm)
Height/bottom of mounting tab to top of cylinder head: 3.2″ (81.2mm)
Distance between mounting holes same side: 0.98″ (25mm)
Distance between mounting holes opposite side: 2.0″ (52mm)
Distance between muffler screw holes: 1.6″ (42mm)
Distance/bottom of mounting tab to muffler screw holes: 1.7″ (42.8mm)
Length from front of case to backplate: 3.3″ (83.8mm)
Length from pump to end of crankshaft: 5.1″ (131mm)
Width of crankcase below mounting tabs: 1.7″ (43mm)
Width between mounting tabs: 2.4″ (61mm)
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