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L-OS17400£208.79
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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

Buy NowIn stock for immediate despatch.
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-OS18640£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.
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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
L-OS18700£321.89
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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.

£321.89

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Part No: L-OS18700
Item Name: OS O.S. MAX 105HZ
Brand: OS
L-OS18750£378.44
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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.

£378.44

This item is currently out of stock.
Email me when availabe!
Part No: L-OS18750
Item Name: OS O.S. MAX 105HZ-R
Brand: OS
L-OS18751£487.19
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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

This item is currently out of stock.
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Part No: L-OS18751
Item Name: O.S. MAX 105HZ-R W/Powerboost Pipe
Brand: OS
L-OS19120£234.24
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Designed to replace the 91FX yet retain the same mounting dimensions but with increased power and torque. The design has been optimsed to produce strong torque and power at modest RPMs and exploit the extremely effective nature of the E-4040 silencer. This concept becomes important as noise becomes less and less acceptable. Like all the latest AX series engines, the highly effective and unique cooling fins keep temperatures under control and the carburettor, the precision you would expect from O.

SPECIFICATIONS
Bore:27.7mm (1.091")
Displacement:0.949cu.in. (15.55cc)
Power Output:2.9PS @ 15,000rpm
Practical RPM:2,000 - 16,000

£234.24

Buy NowIn stock for immediate despatch.
Part No: L-OS19120
Item Name: OS Max 95AX Ring With E-4040
Brand: OS
See Further Items Recommended for OS-Max-95AX-Ring-With-E-4040
L-OS19210£260.99
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The distinctive 120AX is a great engine for swinging big propellers on large aircraft. Generating a massive 3.1PS @ 9000 RPM, this is a serious engine for the discerning pilot. Features a compact silencer system well suited to scale installations. O.S. quality and attention to detail are evident throughout.

SPECIFICATIONS
Bore:30.4mm (1.197")
Displacement:19.96cc (1.2cu.in.)
Power Output:3.1PS @ 9,000rpm
Practical RPM:1,800 - 9,500

£260.99

Buy NowIn stock for immediate despatch.
Part No: L-OS19210
Item Name: OS Max 120AX W/ E-5020 Sil
Brand: OS
See Further Items Recommended for OS-Max-120AX-W/-E-5020-Sil
L-OS19260£282.74
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A large capacity engine that is both compact and lightweight. Specially tuned and ported for lower RPMs with amazing torque, the 160FX is happy to turn larger diameter props on scale aircraft, or low diameter/high pitch props on pattern type aircraft. Complete with an effective silencer and locking prop nut.

SPECIFICATIONS
Bore:33.6mm (1.323")
Displacement:26.23cc (1.60cu.in.)
Power Output:3.7PS @ 9,000rpm
Practical RPM:1,800 - 10,000

£282.74

Buy NowSupplier stock. Despatch will take 3-5 days longer than our standard delivery time.
Part No: L-OS19260
Item Name: OS Max 160FX Ring
Brand: OS
See Further Items Recommended for OS-Max-160FX-Ring
L-OS30600£260.99
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The second engine in the new 'V' series of O.S. four strokes is targeted at both sports and scale modellers alike.

Like the FS-95V, the FS-62V has the same 'classic' overall design that appeals to scale modellers that like their engines to remain in character with the model. The performance, on the other hand, is very much 21st Century and builds on the O.S. tradition of constant technological advancement with each new range. In the case of the 'V' series, there is also a strong emphasis on value for money.

The carburettor remains as the twin-needle type for both power and throttle response and the 'Jet Stream' generation silencer allows both flexibility of orientation as well as effective sound reduction.

By sharing the same mounting bolt pattern as the FS-52 Surpass and FSa-56, mounting the FS-62V as a direct replacement is easy and convenient.

The angled pushrod and valve layout allows a better shape of combustion chamber, providing better power and efficiency.

SPECIFICATIONS
Displacement:10.11cc (0.617cu.in)
Power:1.1PS @ 10000rpm
Weight:486g (17.14ozs) w/Silencer

£260.99

Buy NowIn stock for immediate despatch.
Part No: L-OS30600
Item Name: OS O.S. FS-62V w/F-4050 Silencer
Brand: OS
See Further Items Recommended for O.S.-FS-62V-w/F-4050-Silencer
L-OS30900£269.69
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The first in a completely new series of four stroke engines aimed squarlely at the sport and scale modeller.

Stying is deliberately 'retro' and in keeping with the style of the very first OS four strokes. The original FS-120 had twin rocker covers and so do many full size engines in older aircraft. But 'retro' stying does not mean 'retro' technology! The FS-95V is a sophisticated piece of kit, delivering strong power and torque and offers a cost effective alternative to the FSa-81.

The 60P carburettor is a twin needle design for great throttle response and reliable idling.

SPECIFICATIONS
Bore:29mm (1.142")
Displacement:15.59cc (0.95cu.in)
Power Output:1.7 @ 10,000 rpm
Practical RPM:2,100 - 11,000

£269.69

This item is currently out of stock.
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Part No: L-OS30900
Item Name: OS O.S. FS-95V w/F-5050 Silencer
Brand: OS
See Further Items Recommended for O.S.-FS-95V-w/F-5050-Silencer
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