Heli Nitro Engines

Align RC 55H Engine made in Japan and suitable for superior 55 size helicopter.

Features:

• 40L dual needle carburetor, makes the adjustment much more precisely.
• Delivers more horsepower for higher rotor speeds.
• Brand new crankshaft design. Increase the efficiency of intake/exhaust and makes the power stronger.
• Besides good looks and excellent cooling, this engine is machined blue alumite heat sink head also boosts combustion efficiency for more power stability.
• Same size connector to the mount and the muffler as what Align 50 Hyper engine has,Maximize the efficiency when operating with ALIGN 50 High Performance Muffler.

Specifications:

• Displacement:8.93cc (0.55 cu.in.)
• Bore:23mm (0.91 in.)
• Stroke:21.5mm (0.85 in.)
• Practical rpm range:2000-20000 rpm
• Output:2.1hp/17000rpm
• Weight:408g (14.40 oz.)

Includes:

• OS#8 glow plug x1
• 40L carburetor x1

Broad power band for a wide variety of airplanes including models
designed for .60 2-stroke and .90 4-stroke engines
Redesigned cylinder head to match angled valve layout for steady
power at all times and a perfect balance between high combustion
and efficient cooling
Redesigned Jet Stream muffler with unique shape for more authentic
four stroke sound
Same mounting dimensions, drive hub position and linkage position as
the O.S. FS-91 Surpass II, 61FX, 65LA, 75AX, 95AX and FS-110
Two year limited warranty through Hobby Services beginning at date of
purchase
INCLUDES
O.S. Engines FS-95V Four Stroke Engine with Type F Glow Plug, Muffler
Header Pipe with two Locknuts and Instruction Manual
REQUIREMENTS
Fuel: 5-20 nitromethane aircraft blend with 18 lubricant content
Propeller: Sport & Aerobatic 13x7-9, 14x6-8
Scale 15x6-8

SPECIFICATIONS

Displacement: 0.951cu in (15.59cc)
Bore: 1.142 (29.0mm)
Stroke: 0.929 (23.8mm)
Practical RPM: 2,100 - 11,000RPM
Power Output: 1.7ps10,000RPM
Weight: 20.88oz (592g)
Muffler Weight: 2.05oz (58g)
Crankshaft Size: 516-24
Height from bottom of Mounting Tab to Pushrod Cover: 3.8 (97.5mm)
Height from bottom of Crankcase to Pushrod Cover: 4.7 (119mm)
Distance from Carburetor to Drive Hub: 4.5 (115.7mm)
DistanceMounting Hole Centers Same Side: 0.98 (25mm)
DistanceMounting Hole Centers Opposite Side: 2 (50mm)
Mounting Hole Diameter: 0.16 (4.2mm)
Distance from Drive Hub to end of Crankshaft: 1.5 (37.4mm)
Distance from Drive Hub to center of Engine: 2.6 (66.5mm)
Width at Mounting Tabs: 2.4 (61mm)
Width Below Mounting Tabs: 1.7 (42.6mm)
HeightMounting Tab Bottom to center of Needle Valve: 0.70 (17.8mm)

The 75AX is the next generation of "60 size" class airplane engines. It features the same bolt pattern as the original 61FX though boasts almost an a half a horsepower more! The 61A carburetor has an angled back needle valve which keeps your fingers much further away from a spinning propeller. Twin ball bearings support the hardened steel crankshaft for the ultimate in efficiency. Includes new 4040 Power Box™ muffler which increases volume for greater power, while at the same time being very compact. Angular head design looks great and significantly increases surface area for better cooling. This ABL (Advance Bimetallic Liner) sleeved engine will provide years of power and reliability. Fuel for this engine is recommended to use 5~20% nitro, with at least 18% oil content.

Features:
• Same bolt pattern as original O.S. 61FX, though almost half a horsepower more!
• Angular head design looks great while increasing surface area for better cooling
• Backward angled needle valve for easier and safer access
• Twin ball bearing supported hardend steel crankshaft
• Includes the new Power Box™ muffler, designed with more volume for increased power while still being very compact
• Advanced Bimetallic Liner (ABL) coating developed specifically by O.S.

Specs:

Displacement: 0.75 cu in (12.3cc)
Bore: 1.02 (25.8mm)
Stroke: 0.93 (23.5mm)
Practical RPM: 2,000-16,000 RPM
Power Output: 2.4 PS, 2.37HP15,000 RPM
Weight: 20.39 ounces (578g) wo muffler
26.46 ounces (750g) w muffler
Recommended Props: 14x6, 14x8, 15x7
Crankshaft thread size: 516-24
Distance from center of engine to drive hub: 2.62 (66.6mm)
Distance between exhaust bolt mounting holes 42mm
Height from crankcase bottom to top of cylinder head: 4.07 (103.5mm)
Heightcrankshaft center to top of cylinder head: 3.20 (81.5mm)
Width including mounting tabs: 2.4 (61mm)
Width not including mounting tabs: 1.67 (42.6mm)
Width between mounting holes same side: .98 (25mm)
Width between mounting holes opposite side: 2.04 (52mm)
Diameter of muffler body: 1.92 (48.8mm)
Angle of muffler in relation to engine: 4
Length from end of crankshaft to back of crankcase 5.09 (129.5mm)

High Speed Needle: 1.5 - 2 turns out from fully closed
Low Speed Needle: 2mm gap between the needle and spray bar at full
throttle (looking down the neck of the carb)

This is the O.S. Max 105 HZ Helicopter Engine. This is the engine precision aerobatic and 3D heli pilots have been waiting for! In order for 90-sized machines to nail huge maneuvers and hardcore, smackdown-style 3D it's all about power, and the 105HZ has it in abundance. Displacement has been increased by 15%, while a huge venturi rams air into the carburetor, producing massive power. Plus, they fit in a .90-sized mounting pattern.

Features:
 

•   Featuring the displacement of a 1.05 in the mounting space of a .90.
•   More displacement means more power, and these engines boost displacement by 15%!
•   A huge venturi boosts output even further.
•   The machined, blue anodized heatsink head is light in weight, and cools the engine efficiently.

Specifications:
 

• Displacement: 1.048 cu in (17.17cc)
• Bore: 1.442 in (29mm)
• Stroke: 1.024 in (26mm)
• Practical RPM: 2,000-16,500
• Output: 3.75 hp @ 15,000 rpm
• 105HZ Weight: 21.03 oz (596g)

Premium performance for 30-40-sized machines, from extreme aerobatics to stable hovering
Same mounting pattern and muffler dimensions as the .32 SX-H, for easy installation in most 30-40 size helis
Re-engineered crankshaft reduces vibration resulting in smooth power across the entire RPM range
20M carburetor with idle needle positioned on same side as main needle for easier adjustments
Two year limited warranty

Includes:

• O.S. Max .37 SZ-H Ring Helicopter Engine
• #8 Glow Plug
• 20M Carburetor
• Instruction manual
• Sticker sheet

Specifications:
Displacement: 0.37 cu in (6.07cc)
Bore: 0.806 in (20.5mm)
Stroke: 0.725 in (18.4mm)
Practical RPM range: 2000-21,000
Output: 1.4 ps @ 18,000 RPM
Weight: 10.3 oz (293g)
Crankshaft Size: 1/4-28
Distance between mounting holes same side: 0.6" (15mm)
Distance between mounting holes opposite side: 1.5" (38mm)
Width including mounting flanges: 1.8" (45mm)
Width neglecting mounting flanges: 1.5" (38mm)
Height/bottom of crankcase to top of cylinder head: 3" (76mm)
Height/bottom mounting flanges to top of cylinder head: 2.4" (61mm)
Distance/center of crankcase to front bearing: 1.8" (46mm)
Distance from backplate to front bearing: 2.6" (67mm)
Distance from backplate to end of crankshaft: 3.7" (94mm)
Low speed needle 1 turn in from flush with carb body
High speed needle 1.5 turns out from closed
 

This is the engine that precision aerobatic and 3D heli pilots have been waiting for! In order for 90-sized machines to nail huge maneuvers and hardcore, smackdown-style 3D it's all about power, and the 105HZ-R has it in abundance. Displacement has been increased by 15%, while a huge venturi rams air into the carburetor, producing massive power. Plus, they fit in a .90-sized mounting pattern.

• Featuring the displacement of a 1.05 in the mounting space of a .90.
• More displacement means more power, and these engines boost displacement by 15%!
• A huge venturi boosts output even further.
• The machined, blue anodized heatsink head is light in weight, and cools the engine efficiently.
• An extra feature on the 105HZ-R is the pressurized DRS (Demand Regulator System), which ensures consistent fuel flow regardless of the heli's attitude.

Specifications:

• Displacement: 1.048 cu in (17.17 cc)
• Bore: 1.442 in (29 mm)
• Stroke: 1.024 in (26 mm)
• Practical RPM: 2.000-16,500
• Output: 3.8 ps @ 15,000 rpm
• 105HZ Weight: 21.03 oz (596 g)
• 105HZ-R Weight: 21.46 oz (608 g)

This is the OS 55HZ Hyper Ringed Helicopter Engine with the 40L Carburetor. Ideal for 3D flight-power equal to .60 size heli engines Same mounting bolt pattern and silencer size as the OS 50SX-H Hyper Dual needle 40L carburetor with four arm throttle lever for use with a variety of servo brands Best works with 10% to 30% nitro Fuel with at least 18% lubricant (Helicopter Mix)

Specifications

• Displacement: 0.55 cu in (8.93cc)
• Bore: 0.91" (23mm)
• Stroke: 0.85" (23.5mm)
• Practical RPM: 2,000-17,000 RPM
• Weight: 14.39oz (408g)

The GH15HZ is perfect for sport, 3D and scale pilots alike. But that’s only a part of what makes the GT15 super. It also offers superb fuel economy, a pumped carb to deliver fuel dependably, the ease of the IG-05 Ignition module and smooth running without constant adjustments. And since it’s about the same size as most .90 glow engines, it’s an easy retrofit, too.

Compact — fits most .90-size helis with only minor modifications.
Offers outstanding fuel economy.
Runs consistently without constant pre-flight adjustments.
O.S./Walbro®-developed pumper carb ensures consistent performance regardless of attitude, altitude or fuel level.
Features the IG-05 Ignition Module that is designed specifically for helis.
The IG-05 Ignition Module arrives with a straight plug cap for easy installation. It’s compatible with a wide range of battery chemistries, including NiCd or NiMH, LiPo and LiFe packs.

OS test data shows with a 300cc fuel tank you can achieve an approximately 25 minute long flight!

Muffler Not included. Powerboost muffler recomended for this engine.

Specs:

• Displacement: 0.912 cu in (14.95cc)
• Bore: 1.091" (27.7mm)
• Stroke: 0.976" (24.8mm)
• Practical RPM: 2,000 - 16,000
• Output: 2.76hp @ 14,000 RPM
• Weight: Engine, 26.4oz (748g), IG-05 Ignition Module, 3.2oz (92g), Power Boost Pipe, 7oz (198g), E-4051 Muffler5oz (144g)
• Carburetor Adjustments; If engine responds sluggishly to increased RPM, turn slow needle right 5° and advance throttle stick gradually If engine hesitates before picking up speed, turn slow needle left 10° to richen mixture
• Gasoline/Oil Mix: 25:1
• Distance/Mounting Hole Centers Same Side: 1.02" (26mm)
• Distance/Mounting Hole Centers Opposite Side: 2.1" (53mm)
• Height/Mounting Tab Bottom to top of Cylinder Head: 3.5" (88mm)
• Height/Crankcase Bottom to top of Cylinder Head: 4.3" (109mm)
• Width at Mounting Tabs: 2.4" (61mm)
• Width of Crankcase below Mounting Tabs: 1.7" (42.5mm)
• Distance between Exhaust Mounting Hole Centers: 1.6" (42mm)
• Length from Center of Engine to Front Bearing: 2" (52mm)
• Length from Backplate to Front Bearing: 3.14" (80mm)
• Length from Center of Engine to end of Crankshaft 3.5" (88mm)
• Length from Backplate to end of Crankshaft: 4.75" (121mm)

Includes:

• O.S. Engines GT15HZ Engine with CM-6 Spark Plug
• IG-05 Ignition Module
• No muffler
• Two Servo Throttle Arms
• Instruction Manual

Requires:

• Muffler
• Gasoline: Regular unleaded
• 2-Stroke Engine Oil
• Ignition Battery: 4.8-8.4V NiMH, 6.6V LiFe or 7.4V LiPo, at least 1500mAh

OS GT15HZ Petrol with 15HZ Powerboost Pipe

The GH15HZ is perfect for sport, 3D and scale pilots alike. But that’s only a part of what makes the GT15 super. It also offers superb fuel economy, a pumped carb to deliver fuel dependably, the ease of the IG-05 Ignition module and smooth running without constant adjustments. And since it’s about the same size as most .90 glow engines, it’s an easy retrofit, too.

Compact — fits most .90-size helis with only minor modifications.
Offers outstanding fuel economy.
Runs consistently without constant pre-flight adjustments.
O.S./Walbro®-developed pumper carb ensures consistent performance regardless of attitude, altitude or fuel level.
Features the IG-05 Ignition Module that is designed specifically for helis.
The IG-05 Ignition Module arrives with a straight plug cap for easy installation. It’s compatible with a wide range of battery chemistries, including NiCd or NiMH, LiPo and LiFe packs.

OS test data shows with a 300cc fuel tank you can achieve an approximately 25 minute long flight!

Muffler Not included. Powerboost muffler recomended for this engine.

Specs:

• Displacement: 0.912 cu in (14.95cc)
• Bore: 1.091" (27.7mm)
• Stroke: 0.976" (24.8mm)
• Practical RPM: 2,000 - 16,000
• Output: 2.76hp @ 14,000 RPM
• Weight: Engine, 26.4oz (748g), IG-05 Ignition Module, 3.2oz (92g), Power Boost Pipe, 7oz (198g), E-4051 Muffler5oz (144g)
• Carburetor Adjustments; If engine responds sluggishly to increased RPM, turn slow needle right 5° and advance throttle stick gradually If engine hesitates before picking up speed, turn slow needle left 10° to richen mixture
• Gasoline/Oil Mix: 25:1
• Distance/Mounting Hole Centers Same Side: 1.02" (26mm)
• Distance/Mounting Hole Centers Opposite Side: 2.1" (53mm)
• Height/Mounting Tab Bottom to top of Cylinder Head: 3.5" (88mm)
• Height/Crankcase Bottom to top of Cylinder Head: 4.3" (109mm)
• Width at Mounting Tabs: 2.4" (61mm)
• Width of Crankcase below Mounting Tabs: 1.7" (42.5mm)
• Distance between Exhaust Mounting Hole Centers: 1.6" (42mm)
• Length from Center of Engine to Front Bearing: 2" (52mm)
• Length from Backplate to Front Bearing: 3.14" (80mm)
• Length from Center of Engine to end of Crankshaft 3.5" (88mm)
• Length from Backplate to end of Crankshaft: 4.75" (121mm)

Includes:

• O.S. Engines GT15HZ Engine with CM-6 Spark Plug
• IG-05 Ignition Module
• Power GT15HZ boost pipe
• Two Servo Throttle Arms
• Instruction Manual

Requires:

• Muffler
• Gasoline: Regular unleaded
• 2-Stroke Engine Oil
• Ignition Battery: 4.8-8.4V NiMH, 6.6V LiFe or 7.4V LiPo, at least 1500mAh

Yamada TareQ 96 SRX Helicopter Engine

The YS96 SRX Tareq engine has been a collaboration between YS Engines of Japan, and Tareq Alsaadi. Looking to further improve on the impressive performance of the YS 91 SRX, YS and Tareq spent many hours of R&D to bring the 96 to the table. With the co-op, YS has landed with the highest power 90 sized engine to date.

Features:

• Larger Cylinder Head for Improved Cooling
• Improved Porting of Sleeve
• Counterbalanced Crankshaft for Excellent Balance at all RPM's
• Proven pressurized regulator and fuel injection system for a superior throttle response
• Steel lined back plate to reduce drag for more power

Specifications:

• Type: 2-stroke helicopter engine
• Displacement: 0.96 cu. in. (15.75 cc)
• Bore: 1.06 in (27.0mm)
• Stroke: 1.08 in (27.5mm)
• Cylinders: Single
• Total Weight: 19.5 oz (565 g)
• RPM Range: 2,000–17,000

This is the YS .60SR Side Exhaust Competition Helicopter Engine. The YS60SR was developed specifically for 50 class helicopters. The increased displacement of the YS60SR produces more power, and will make your 50 fly more like a 700/90 class machine! Additionally, the YS60SR was designed to run well on 15-30% nitro content fuel without head clearance changes.

Features:

Same mounting as the YS50ST and YS56SR
Proven fuel regulator system for a consistent and reliable operation
Three needle valve sytem for easier adjustment and fine tuning
Balanced crankshaft for smoother running
 

• DISPLACEMENT: 10cc
• BORE: 24mm
• STROKE: 22mm
• WEIGHT: 407 GRAMS

The new Power Yamada Engie, the best choice for 3D !!!! now tuned by Rüdiger Feil!

New even more powerful 90 size heli motor from YS, Featuring a brand new crankcase design, new cylinder head design, new cylinder liner & piston design & new crankshaft the overal effect is a huge power increase while still keeping the same mounting patterns as a standard YS 91SR! it really is simply the best!

Features Include:

NEW Larger cylinder head for better cooling and performance

  NEW Steel lined backplate to minimize drag resulting in better performance and increased horsepower
  NEW Piston & Sleeve design increasing both performance and efficiency
  Proven Regulated fuel system for positive fuel flow during all types of flight conditions

•   DISPLACEMENT: 14.89cc
•   BORE：27mm
•   STROKE：26mm
•   WEIGHT: 553g
•   PRACTICAL RPM: 2000~17,000

The new YS91SRS has a steel lining on the back plate to minimize drag to increase performance and horsepower. Back plate mounting RPM sensors will not work, because the steel lining will block the pick-up. A magnet mounted on the clutch bell or fan unit is recommended. Another option is to replace the steel lined back plate with an all aluminum back plate (same as YS91SR), if you choose to use your back plate mounted RPM sensor.

Same mounting as the YS91 making it easy to add more power to the existing helicopter
Proven factory preset regulator for a consistent, reliable operation
Steel lined back plate to minimize drag resulting in increased horsepower
Larger cylinder head for better cooling YS120SR

Specs:
Bore: 30.38MM
Stroke: 27.5MM
Displacement: 19.93CC
Weight: 554g
Practical RPM: 2,000 - 17,000

OS Max 105HZ with Powerboost Pipe Combo

Specifications:

• Displacement: 1.048 cu in (17.17 cc)
• Bore: 1.442 in (29 mm)
• Stroke: 1.024 in (26 mm)
• Practical rpm: 2,000-16,500
• Output: 3.8 hp @ 15,000 rpm
• Weight: 21.03 oz (596 g)

OS Max 105HZ-R with MRCI Pipe Combo (Color- as stock allows)

Specifications:

• Displacement: 1.048 cu in (17.17 cc)
• Bore: 1.442 in (29 mm)
• Stroke: 1.024 in (26 mm)
• Practical rpm: 2,000-16,500
• Output: 3.8 hp @ 15,000 rpm
• Weight: 21.03 oz (596 g)

Including :

1. OS 105HZ-R with DRS fuel regulator
2. MRCI muffler with Adaptor for OS ( color can vary)