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Featured a highly effective gear type fuel pump.
   
Enya_60XH
Manufacturer:  Enya
Engine size:  60
Practical RPM:  
Stroke:   0.9169/1
Bore:   0.9445in (24mm)
Power Output:   
Displacement:
Stroke:  0.9169/1
Weight: 
Length   4.24in (107.8mm)
Height   3.96in (100.5mm)
Registered Owners:     0
Listed in Classifieds:    0
 
     

     
 
Proven to be a reliable quality engine, giving a comfortable amount of power for most 30 sized Helicopters. Made in the UK. (2006 UK price £99.99)
   
Irvine 36H
Manufacturer:  Irvine
Engine size:  36
Practical RPM:   3'000 - 20'000
Stroke:  
Bore:   20.5mm
Power Output:    1.1PS@19,000
Displacement: 5.94cc
Stroke: 
Weight: 
Length  
Height  
Registered Owners:     8
Listed in Classifieds:    0
 
     

     
 
All the power of the old 'F1' but with lower RPM torque and better throttle response. Brand new components and extensive testing. (£119.99 2006 UK Price)
   
Irvine 39 ABC
Manufacturer:  Irvine
Engine size:  39
Practical RPM:   3,000-21,000
Stroke:   18.0mm
Bore:   21.20mm
Power Output:    1.4PS@20,000
Displacement: 6.35cc
Stroke:  18.0mm
Weight:  310g
Length  
Height  
Registered Owners:     1
Listed in Classifieds:    0
 
     

     
 
The 'Top of the range' engine in the OS helicopter range combines all the advantages of the PS pump system with the benefits of the distinctive 'Viper' cylinder head.(£399.99 2006 UK retail)
   
O.S. MAX 91SX-H Ring C-Spec PS Vipr
Manufacturer:  OS
Engine size:  91
Practical RPM:   2000-16000
Stroke:   24.8mm 0.976in
Bore:   27.7mm 1.09in.
Power Output:    3.2PS@15000 RPM
Displacement: 14.95cc 0.91cu in.
Stroke:  24.8mm 0.976in
Weight:  568.3g 20.03 oz
Length  
Height  
Registered Owners:     3
Listed in Classifieds:    0
 
     

     
 
Similar to the standard 91SX-H C-Spec but with the added advantage of the stunning new 'Viper' head. Not only does this cylinder head improve power, it also improves cooling and throttle response as well.
   
O.S. MAX 91SX-H Ring C-Spec Viper
Manufacturer:  OS
Engine size:  91
Practical RPM:   2000-16000
Stroke:   24.8mm 0.976in
Bore:   27.7mm 1.09in.
Power Output:    3.1PS@15000 RPM
Displacement: 14.95cc 0.91cu in.
Stroke:  24.8mm 0.976in
Weight:  534.3g 18.84 oz
Length  
Height  
Registered Owners:     2
Listed in Classifieds:    0
 
     

     
 
This totally new engine has been designed from scratch as a pure helicopter engine, as is evident from the unique 'SZ' crankcase.( £214.99 2006 Uk price)
   
O.S. MAX 91SZ-H Ring
Manufacturer:  OS
Engine size:  91
Practical RPM:   2000-16000
Stroke:   24.8mm
Bore:   27.7mm
Power Output:    3.3PS@1500 RPM
Displacement: 14..95cc
Stroke:  24.8mm
Weight: 
Length  
Height  
Registered Owners:     8
Listed in Classifieds:    0
 
     

     
 
This is a high performance engine expressly designed for F3C competition. The 91RZ-H DH Ring version is installed with a flat head to fit in scale helicopters.(£214.99 2006 UK price)
   
O.S. MAX 91RZ-H (H) Ring
Manufacturer:  OS
Engine size:  91
Practical RPM:   2000-16000RPM
Stroke:   24.8mm
Bore:   27.7mm
Power Output:    3.3PS/15000RPM
Displacement: 14.95cc
Stroke:  24.8mm
Weight:  623g
Length  
Height  
Registered Owners:     0
Listed in Classifieds:    0
 
     

     
 
There's a new stronger crankcase (with 6-point mounts), a new 3-needle carburettor and a completely new liner/port design to give the performance you need.
   
O.S. MAX 70SZ-H Ring
Manufacturer:  OS
Engine size:  70
Practical RPM:   2000-18000
Stroke:   22.0mm
Bore:   25.8mm 1.016in.
Power Output:    2.5/16000 (BHP/RPM)
Displacement: 11.5cc 0.702cu .in
Stroke:  22.0mm
Weight:  553.5g
Length  
Height  
Registered Owners:     1
Listed in Classifieds:    0
 
     

     
 
That CNC machined cylinder head has been developed to give better power and improved cooling at the same time. The new carburettor has also been improved to help extract more power than the standard engine without sacrificing the throttle precision. (£164
   
OS50 Hyper
Manufacturer:  OS
Engine size:  50
Practical RPM:   2000-20000
Stroke:   19.6mm 0.772in
Bore:   22.0mm 0.866in.
Power Output:    1.8/17000 (BHP/RPM)
Displacement: 0.499 cu.in (8.0cc)
Stroke:  19.6mm 0.772in
Weight:  413g
Length  
Height  
Registered Owners:     107
Listed in Classifieds:    0
 
     

     
 
The 32SX-H has a new design of large bore carburettor - type 20C. Ringless piston/liner assembly, twin ball raced crankshaft, enlarged cylinder head for improved cooling
   
OS32 SX-H ABC
Manufacturer:  OS
Engine size:  32
Practical RPM:   2000-22000
Stroke:   17.5mm 0.689in
Bore:   19.5mm 0.768in.
Power Output:    1.2PS@18000 RPM
Displacement: 5.23cc 0.32cu in.
Stroke:  17.5mm 0.689in
Weight:  285g (ring) 10.05 oz
Length  
Height  
Registered Owners:     8
Listed in Classifieds:    0
 
     

     
 
Just about everything has been changed compared to the 32SX-H in the pursuit of power and control. That super-rigid crankcase contains a highly developed, ringed piston/liner set and optimised crankshaft.
   
OS37 SZ.H
Manufacturer:  OS
Engine size:  37
Practical RPM:   2000-21000
Stroke:   18.4mm 0.724in
Bore:   20.5mm 0.807in.
Power Output:    1.4PS@18000 RPM
Displacement: 6.07cc 0.37cu in.
Stroke:  18.4mm 0.724in
Weight:  293g 10.33 oz
Length  
Height  
Registered Owners:     4
Listed in Classifieds:    0
 
     

     
 
A budget engine with a relative performance and reliability. Good for beginners when keeping the initial prices down.
   
SC32 Ringed
Manufacturer:  Super Custom
Engine size:  32
Practical RPM:   2000-12000
Stroke:   18.40
Bore:   19.00
Power Output:    5.22 cc
Displacement:
Stroke:  18.40
Weight:  295g
Length  
Height  
Registered Owners:     0
Listed in Classifieds:    0
 
     

     
 
Same spec as their 32 engine. Budget price engine ideal for beginners.
   
SC 36 Ringed
Manufacturer:  Super Custom
Engine size:  36
Practical RPM:   2000-12200
Stroke:   18.40
Bore:   20.20
Power Output:    5.90cc
Displacement:
Stroke:  18.40
Weight:  295g
Length  
Height  
Registered Owners:     1
Listed in Classifieds:    0
 
     

     
 
Exhaust bolt spacing = 42mm / width = 62.49mm
   
TT 61 Pro Heli
Manufacturer:  Thunder Tiger
Engine size:  61
Practical RPM:  
Stroke:   0.904in (22.96mm)
Bore:   .9255in (23.52mm)
Power Output:    2bhp @17'200rpm
Displacement: 9.966cc
Stroke:  0.904in (22.96mm)
Weight: 
Length   3.54in (89.96mm)
Height   4.06in (103.1mm)
Registered Owners:     0
Listed in Classifieds:    0
 
     

     
 
   
West 50H
Manufacturer:  West
Engine size:  50
Practical RPM:   2,500 - 18.000
Stroke:   19.5mm
Bore:   19.45mm
Power Output:   
Displacement: 8.3cc
Stroke:  19.5mm
Weight:  392g
Length   83.8mm
Height   93.5mm
Registered Owners:     9
Listed in Classifieds:    0
 
     

     
 
   
West 90H
Manufacturer:  West
Engine size:  90
Practical RPM:   2.000 - 16.000
Stroke:   20.5mm
Bore:   27.6mm
Power Output:   
Displacement: 15.0cc
Stroke:  20.5mm
Weight:  675g
Length   95.4mm
Height   116.3mm
Registered Owners:     1
Listed in Classifieds:    0
 
     

     
 
This powerful YS .91 Helicopter engine has been optimized to provide the ultimate power with maximum efficiency and reliability. The YS .91 includes a larger bore cylinder design for superior operation thus reducing cut outs, improved carburetor design fo
   
YS 91
Manufacturer:  YS
Engine size:  91
Practical RPM:   2,500 to 15,000 RPM
Stroke:  
Bore:  
Power Output:   
Displacement:
Stroke: 
Weight:  19.2 oz.
Length  
Height  
Registered Owners:     18
Listed in Classifieds:    0
 
     

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