Helicopter Engines
Products
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O.S. MAX 32SX-H Ring w/o Drive Wash (L-OS12986)
Designed for .30 class sport and scale helicopters, the 32SX-H Ring has an identical specification to the 32SX-H, but uses a ringed piston/liner assembly to give a lower compression on start-up without sacrificing top end power and performance.
£115.00 inc. V.A.T.
R.R.P.:
£132.99 -
O.S. MAX 37SZ-H Ring w/o Drive Wash (L-OS14000)
Following on from the concept developed in the 70SZ-H, the latest 37SZ-H brings a new level of performance to '30-class' helicopters.
£146.99 inc. V.A.T.
R.R.P.:
£154.99 -
O.S. MAX 55HZ Hyper
The max 50SX-H Hyper has established an enviable reputation for power, reliability and ease of use. The Max 55HZ Hyper moves that to a whole new level!
Designed primarily with the demands of the 3D pilot in mind, the 55HZ Hyper delivers 61 size performance in a 46 size crankcase. That power comes from the extensive experience that OS has gained over many years and working extensively with the worlds top pilots to refine all aspects of the engine without compromise in any area.
By using the same mounting layout, you can drop a 55HZ into any model that previously suited the 50SX-H without modification. Just the area around the new carburettor is a little bigger and may require adjustmenst to the cooling shroud.
This entirely new engine shares almost nothing with the 50SX-H and has some new features not seen on an engine of this size before. The rear bearing is now designed to resist corrosion, the new 40L carburettor has three adjustments to cater for idle, mid range and full power. Until now, these features were the domain of 61 class engines or bigger. The throttle arm has four leaves so that push pull control is easy from any direction. The heatsink head is bigger for improved cooling as well.
For the first time, OS is also offering a matching tuned muffler as an option part and has been optimised to extract the maximum performance from the 55HZ Hyper. Part number X-OS72144000.£219.98 inc. V.A.T.
R.R.P.:
£244.99 -
L-OS18600: O.S. MAX 91HZ Ring
£278.00 inc. V.A.T.
R.R.P.:
£299.99 -
O.S. MAX 91HZ-PS Ring
Designed primarily for the 3D flight and dramatic aerobatic manouevres..
Compared to the old 'Hyper' the new 91HZ-PS offers improved hovering stability as well as power at high speed to meet the further sophisticated 3D competition manouevres
A new design piston and crankshaft reduces vibration to provide further, stable torque over the entire RPM range.
The rectangular heatsink head is completely included in the cooling shroud for better cooling. The black alumite finish with O.S. and 91HZ-PS logo impart a distinctive image.
A Thermo insulator is installed on the carburetor mounting spigot and helps shut out engine heat to the carburettor, which in turn ensures a stable fuel/air mixture
The 91HZ-PS is equipped with a new, bigger capacity PD-08 pump and matched 61B-P carburettor plus integral regulator, which assures a consistent fuel supply irrespective of violent changes in model attitude.
Combined with O.S. pump system, internal parts improvements same as the 91HZ contribute to stable power output and smoother higher engine performance.£314.99 inc. V.A.T.
R.R.P.:
£349.99