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L-OS15490OS O.S. MAX 46AXII w/E-3071 Silencer£119.18
Designed to succeed the original 46AX, the new 46AX MkII retains the same mounting dimensions, but O.S. have updated the styling to bring it into line with the current range of AX engines. That means the introduction of the highly efficient and unique cooling fins to keep temperatures under control while the precision carburettor, with its angled needle valve keeping fingers safely away from the propeller disc, offers the linear response across the entire rpm range that you would expect from O.S.

SPECIFICATIONS
Bore:22.0mm (0.866")
Displacement:7.5cc (0.455cu.in.)
Power Output:1.63hp @ 16,000 rpm
Practical RPM:2 - 17,000

£119.18

Buy NowIn stock for immediate despatch.
Part No: L-OS15490
Item Name: OS O.S. MAX 46AXII w/E-3071 Silencer
Brand: OS
L-OS15550OS 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

£191.39

Buy NowSupplier stock. Despatch will take 3-5 days longer than our standard delivery time.
Part No: L-OS15550
Item Name: OS Max 50SX-H Ring - Hyper
Brand: OS
See Further Items Recommended for OS-Max-50SX-H-Ring---Hyper
L-OS15612OS O.S. MAX 55AX(40K) w/E-3070 Sil£143.54
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Designed to combine maximum power with razor sharp throttle response in the smallest possible crankcase, the 55AX has the same mounting dimensions as the popular 46AX above, but an increase in power to 1.75PS. The dramatic AX fin styling is used for optimum cooling and the rearward angled needle on the carb makes adjustments safer. The new 40K carb and also helps increase the horsepower over the previous 40J model. Perfect for sport, scale and aerobatic models.

SPECIFICATIONS
Bore:23mm (.906")
Capacity:8.93cc (.545 cu.in)
Power Output:1.68hp (1.75 PS) @ 16,000rpm
Practical RPM:2,000 - 17,000

£143.54

Buy NowIn stock for immediate despatch.
Part No: L-OS15612
Item Name: OS O.S. MAX 55AX(40K) w/E-3070 Sil
Brand: OS
L-OS15630OS Max 55HZ - Hyper£247.94
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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.

SPECIFICATIONS
Bore:23mm (0.91")
Displacement:8.93cc (0.55cu.in)
Power Output:2.1PS @ 17,000rpm
Practical RPM:2,000 - 20,000

£247.94

Buy NowIn stock for immediate despatch.
Part No: L-OS15630
Item Name: OS Max 55HZ - Hyper
Brand: OS
See Further Items Recommended for OS-Max-55HZ---Hyper
L-OS15650OS O.S. MAX 55HZ-R£251.99
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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.

SPECIFICATIONS
Bore:23mm (0.91")
Displacement:8.93cc (0.55cu.in)
Power Output:2.1PS @ 17000rpm
Practical RPM:2,000 - 20,000

£251.99

Buy NowIn stock for immediate despatch.
Part No: L-OS15650
Item Name: OS O.S. MAX 55HZ-R
Brand: OS
See Further Items Recommended for O.S.-MAX-55HZ-R
L-OS16512OS O.S. MAX 65LA Silv.W/E-4010 Sil.£139.19
A low-cost engine for beginners and sports models, it is reliable and very easy to handle. In both cases the needle valve is mounted at the rear of the motor, so that it can be adjusted safely and at a distance from the spinning propeller. A true lightweight 60 class engine with a surprisingly high performance.

£139.19

Buy NowSupplier stock. Despatch will take 3-5 days longer than our standard delivery time.
Part No: L-OS16512
Item Name: OS O.S. MAX 65LA Silv.W/E-4010 Sil.
Brand: OS
L-OS16521OS O.S. Max 65AX w/E-4010A£173.99
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Designed as a replacement for the long established Max 61FX, the new Max 65AX has all the features of the new AX series, such the same mounting bolt pattern and silencer bolt dimensions, making a direct replacement for most 61 class engines. The real bonus is more power and torque for the same basic external dimensions.

Like all the AX series, cooling has been improved by the use of deep finning on the crankcase and cylinder head combined with the new fin pack shape.

The silencer is effective and a great benefit to flying fields with sensitive noise iossues.

SPECIFICATIONS
Bore:24.0mm (0.945")
Displacement:10.63cc (0.649cu.in)
Power Output:1.75PS @ 16000rpm
Practical RPM:2,500 - 12,000

£173.99

This item is currently out of stock.
Email me when availabe!
Part No: L-OS16521
Item Name: OS O.S. Max 65AX w/E-4010A
Brand: OS
See Further Items Recommended for O.S.-Max-65AX-w/E-4010A
L-OS17400OS Max 75AX With E-4020£208.79
The latest engine in the exciting AX series. Features radical new styling combined with amazing levels of power and torque. Sharing the same mounting dimensions as the 61FX, the new 75AX makes an interesting proposition for pilots that want a straighforward power upgrade. Complete with 'P-Box' silencer.

SPECIFICATIONS
Bore:25.8mm (1.016")
Displacement:12.29cc (0.75cu.in.)
Power Output:2.4PS @ 15000rpm
Weight:578g (20.39oz)

£208.79

This item is currently out of stock.
Email me when availabe!
Part No: L-OS17400
Item Name: OS Max 75AX With E-4020
Brand: OS
See Further Items Recommended for OS-Max-75AX-With-E-4020
L-OS18620OS Max 91HZ-PS Ring - Pumped£304.49
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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.

SPECIFICATIONS
Bore:27.7mm
Displacement:14.95cc
Power Output:3.5PS @ 15,000rpm
Practical RPM:2,000 - 16,000

£304.49

This item is currently out of stock.
Email me when availabe!
Part No: L-OS18620
Item Name: OS Max 91HZ-PS Ring - Pumped
Brand: OS
See Further Items Recommended for OS-Max-91HZ-PS-Ring---Pumped
L-OS18640OS O.S. MAX 91HZ-R Ring£314.99
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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.

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

£314.99

This item is currently out of stock.
Email me when availabe!
Part No: L-OS18640
Item Name: OS O.S. MAX 91HZ-R Ring
Brand: OS
See Further Items Recommended for O.S.-MAX-91HZ-R-Ring
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