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L-IRV4393
Irvine 39 ABC R/C Heli
£
94.49
A phenomenally powerful helicopter engine that produces massive levels of torque. Features an ABC piston/liner assembly and twin ball races for enhanced durability. The twin needle precision carburettor ensures razor-sharp throttle response. Best suited to the latest generation of 'larger' 30 size machines.
SPECIFICATIONS
Bore:
21.20mm (0.835")
Displacement:
6.35cc (0.39cu.in.)
Power Output:
1.4PS @ 20000 rpm
Practical RPM:
3000 - 21000 rpm
Stroke:
18.0mm (0.709")
Weight:
310g (10.94oz.)
£94.49
Part No: L-IRV4393
Item Name: Irvine 39 ABC R/C Heli
Brand:
Irvine
L-OS14000
OS Max 37SZ-H Ring
£
160.94
The brilliant new O.S. 37SZ-H is the perfect choice when you want the ultimate in performance from your 30 class helicopter. Features a super-rigid crankcase, ringed piston/liner assembly, and a new carburettor for precision control, suitable for use with push-pull set ups. An outstanding performer.
SPECIFICATIONS
Bore:
20.5mm (0.807")
Displacement:
6.07cc (0.37cu.in.)
Power Output:
1.4PS @ 18000rpm
Practical RPM:
2,000 - 21,000
Stroke:
18.4mm 0.724in
Weight:
293.0g 10.33 oz
£160.94
Part No: L-OS14000
Item Name: OS Max 37SZ-H Ring
Brand:
OS
L-OS15550
OS Max 50SX-H Ring - Hyper
£
191.39
The ultimate 50 class helicopter engine. Features a CNC machined cylinder head, for increased power with improved cooling, twin ball races, and a newly designed high performance carburettor for razor-sharp control of the immense power and torque available. Outstanding quality, with performance to match.
SPECIFICATIONS
Bore:
22.0mm (0.866")
Displacement:
8.17cc (0.50cu.in.)
Power Output:
1.9PS @ 17000rpm
Practical RPM:
2,000 - 20,000
Stroke:
19.6mm (0.772")
Weight:
406g (14.32oz)
£191.39
Part No: L-OS15550
Item Name: OS Max 50SX-H Ring - Hyper
Brand:
OS
L-OS15630
OS Max 55HZ - Hyper
£
247.94
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 O.S. 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, O.S 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.
SPECIFICATIONS
Bore:
23mm (0.91")
Displacement:
8.93cc (0.55cu.in)
Power Output:
2.1PS @ 17,000rpm
Practical RPM:
2,000 - 20,000
Stroke:
21.5mm (0.85")
Weight:
408g (14.39oz)
£247.94
Part No: L-OS15630
Item Name: OS Max 55HZ - Hyper
Brand:
OS
L-OS15650
O.S. MAX 55HZ-R
£
279.90
The latest engine in the 600/50 helicopter class borrows much of its technology from the fabulous Max 91HZ-R, to provide class leading power under the most demanding of 3D manouevres.The latest DRS system (Demand Regulator System) uses a crankcase pressure tap-off to pressurise the fuel tank via a one way valve. The pressurised fuel is then carfully regulated at the carburettor to provide the optimum mixture no matter what demands are placed on it. This is done by using the negative pressure in the carburettor venturi as part of the regulation system.The carburettor itself has three mixture controls for low/mid and high speed settings.
Once set for the fuel demands of your model/type of fuel and muffler, there is rarely any need to change those settings again.The main mechanics of the engine itself are the same as the regulat Max 55HZ.
SPECIFICATIONS
Bore:
23mm (0.91")
Displacement:
8.93cc (0.55cu.in)
Power Output:
2.1PS @ 17000rpm
Practical RPM:
2,000 - 20,000
Stroke:
21.5mm (0.85")
Weight:
429g (15.13oz)
£324.99
£279.90
Part No: L-OS15650
Item Name: O.S. MAX 55HZ-R
Brand:
OS
L-OS18640
OS O.S. MAX 91HZ-R Ring
£
314.99
This version of the Max 91HZ series utilises a completely different system for supplying and regulating the the fuel supply to the carburettor and is called DRS (Demand regulator system). Unlike the Max 91HZ-PS, the Max 91HZ-R utilises a pressure bleed from the crankcase to pressurise the main fuel tank. The pressurised fuel feed is then regulated by a newly designed regulator that is well isolated from the heat of the engine through its mounting position. That regulated fuel supply is then feed into the new 61E carburettor.The serious 3D flier now has the choice between a mechanically pressurised fuel system (Max 91HZ-PS) or the tank pressurised system in the Max 91HZ-R.
It is purely a matter of personal choice for the pilot. What other manufacturer gives you that level of choice in one engine size?Mechanically, the Max 91HZ-R is identical to the other engines in the Max 91HZ range.
SPECIFICATIONS
Bore:
27.7mm (1.091")
Displacement:
14.95cc (0.912 cu.in.)
Power Output:
3.4hp @ 15,000rpm
Practical RPM:
2,000 – 16,000
Stroke:
24.8mm (0.976")
Weight:
625g (22.05oz.)
£314.99
Part No: L-OS18640
Item Name: OS O.S. MAX 91HZ-R Ring
Brand:
OS
L-OS18700
OS O.S. MAX 105HZ
£
321.89
The biggest, pure helicopter engine that OS have ever made delivers the levels of torque and power demanded by top fliers for both F3C and sport applications.The 15% increase in capacity offers a big increase over the .91 class engines yet still fits in mounts designed for that class. Modification to the cooling shroud is also unlikely.The distinctive 'blue anodised' cylinder head distinguishes the 105HZ engines from the 91HZ series yet retains the HZ series styling overall. General internal design is very similar to the 91HZ series and draws on OS's deep experience in creating the best helicopter engines for all classes.
Advanatges over 120 size heli engines of other makes:1) Uses same main gear ratio as .91 class engines2) Vibration levels the same as the 91HZ so does not tend to break heli parts.3) Easy carburettor adjustment that stays in tune.4) Crankcase is noticeably cooler5) More torque in the mid range6) Velocity stack on carburettor sucks cool, undisturbed air from the fan flow.7) Longer run time per tank8) 105HZ with 15% nitro is similar power to a 91HZ with 30% nitro.
£321.89
Part No: L-OS18700
Item Name: OS O.S. MAX 105HZ
Brand:
OS
L-OS18750
OS O.S. MAX 105HZ-R
£
378.44
The biggest, pure helicopter engine that OS have ever made delivers the levels of torque and power demanded by top fliers for both '3D' and sport applications.The 15% increase in capacity offers a big increase over the .91 class engines yet still fits in mounts designed for that class. Modification to the cooling shroud is also unlikely.The distinctive 'blue anodised' cylinder head distinguishes the 105HZ engines from the 91HZ series yet retains the HZ series styling overall.
General internal design is very similar to the 91HZ series and draws on OS's deep experience in creating the best helicopter engines for all classes.Like the 91HZ-R 3D, the new 105HZ-R utilises the OS 'DRS' fuel delivery system to cope with the extreme manouevres of modern 3D flight.Advanatges over 120 size heli engines of other makes:1) Uses same main gear ratio as .91 class engines2) Vibration levels the same as the 91HZ so does not tend to break heli parts.3) Easy carburettor adjustment that stays in tune.4) Crankcase is noticeably cooler5) More torque in the mid range for 3D6) Velocity stack on carburettor sucks cool, undisturbed air from the fan flow.7) Longer run time per tank8) 105HZ with 15% nitro is similar power to a 91HZ with 30% nitro.
£378.44
Part No: L-OS18750
Item Name: OS O.S. MAX 105HZ-R
Brand:
OS
L-OS18751
O.S. MAX 105HZ-R W/Powerboost Pipe
£
487.19
Identical to the regular 105HZ-R technically but supplied with the latest Powerboost 105 pipe. The pipe has been purpose designed to suit the 105HZ-R and will provide high power and torque across the RPM range without heat build up caused by restriction of gas flow.
£487.19
Part No: L-OS18751
Item Name: O.S. MAX 105HZ-R W/Powerboost Pipe
Brand:
OS
L-OS38153
O.S. GT15HZ Petrol w/P.boost Pipe
£
408.89
The O.S. GT15HZ 2-Stroke petrol helicopter engine is also the first petrol engine designed especially for 90 class engine/ 700 size helicopters. With an approximate runtime ratio of 1 minute per 10cc of petrol, it offers astoundingly long flight times and low cost alternative to glow fuel.Gasoline engines generates larger amount of heat. To prevent overheating, a large deep-finned head is employed which ensures a steady power supply by cooling entire engine efficiently.The Ignition unit has been designed with ignition timing specifically for helicopter engines and features a straight plug cap for easier installation in the limited space.
Suitable for use with a 4.8-7.5V battery.
OS test data shows with a 300cc fuel tank you can achieve an approximately 25 minute long flight!
The included PowerBoost pipe gives you maximum power from the engine and an improved throttle response.
£408.89
Part No: L-OS38153
Item Name: O.S. GT15HZ Petrol w/P.boost Pipe
Brand:
OS
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