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OS Engines

OS 10 LA Type: Aircraft 11400

Displacement (cu in): 0.107 (1.76cc)
Bore (in): 0.529 (13.4mm)
Stroke (in): 0.488 (12.4mm)
RPM: 2,500-18,000
Output:
(BHP@RPM) 0.27 @ 17,000
Weight (oz): 3.95 (112g)
Recc.Props: 7x4, 7x5

OS 15 LA Type: Aircraft 11530

Displacement (cu in): 0.15 (2.5cc)
Bore (in): 0.598 (15.2mm)
Stroke (in): 0.539 (13.7mm)
RPM: 2,500-18,000
Output:
(BHP@RPM) 0.41 @17,000
Weight (oz): 4.87 (138g)
Recc.Props: 7x5, 7x6, 8x4, 8x5

OS 15 CVA 11620

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Displacement    2.49cc(0.152cu.in)
Output                0.5ps/18,000r.p.m.
Bore                  15.2mm(0.598in.)
Practical r.p.m.Range   2,500-19,000r.p.m.
Stroke              13.7mm(0.539in.)
Weight             170g(5.99oz.)

OS 25FX W/892 SILENCER 12660

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Displacement    4.07cc(0.248cu.in)
Output               0.84ps/18,000r.p.m.
Bore                  18.0mm(0.708in.)
Practical r.p.m.Range 2,500-19,000r.p.m.
Stroke             16.0mm(630in.)
Weight              248g(8.75oz.)

OS 32 SX Type: Aircraft 12970

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Displacement        5.23cc(0.319cu.in)
Output                   1.2ps/18,000r.p.m.
Bore                      19.5mm(0.768in.)
Practical r.p.m.Range2,000-22,000r.p.m.
Stroke                    17.5mm(0.689in.)
Weight                   270g(9.53oz.)

OS 46 LA Type: Aircraft 13390

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Displacement (cu in): 0.467 (7.5 cc)
Bore (in): 0.906 (23.0 mm)
Stroke (in): 0.724 (18.4 mm)
RPM: 2000-16,000

OS 65 LA Type: Aircraft 16512

Displacement (cu in): 0.662 (10.8cc)
Bore (in): 0.944 (24mm)
Stroke (in): 0.925 (23.5mm)
RPM: 2,000-16,000

OS 25 LA Type: Aircraft 12350

OS 46 AX Type: Aircraft 15480

Displacement (cu in): 0.455 cu in (7.5cc)
Bore (in): 0.866 in (22.0mm)
Stroke (in): 0.772 in (19.6mm)
RPM: 2,000-17,000

Output:
(BHP@RPM) 1.65 bhp @16,000 rpm
Weight (oz): 17.2 oz (489g) w/muffler
Recc.Props: 10.5x6, 11x6-8, 12x6-7

OS 50 SX Type: Aircraft 15600

Displacement (cu in): 0.499 (8cc)
Bore (in): 0.866 in (22mm)
Stroke (in): 0.847 in (21.5mm)
RPM: 2000-17,000
Output:
(BHP@RPM) 1.8ps @ 17,000 rpm
Weight (oz): 13.76oz (390g)

OS 55 AX Type: Aircraft 15610

More muscle for .40 sized airplanes.

Increase displacement in your 40-size model the easy way: just drop in a .55 AX engine! You’ll enjoy more horsepower for swinging bigger props — which means improved 3D, precision and sport flying. Best of all, there’s no modifications required!

Mounts directly into the bolt pattern for a .46 AX.
A diagonally-placed needle eliminates the need for a remote needle valve.The 5-sided, angular head design looks great and significantly increases surface area for better cooling.

Displacement: 0.545 cu in (9 cc)
Bore: .91 in (23 mm)
Stroke: 0.85 in (21.5 mm)
Weight: 14.3 oz (404 g)
Includes: #8 glow plug, 40J carburetor, E-3010 muffler
Recommended Props: 12x7, 12x8, 13x6, 13x7

OS 61 FX Type: Aircraft 17750

Displacement (cu in): 0.607
Bore (in): 0.945
Stroke (in): 0.866
RPM: 2,000-17,000
Output:
(BHP@RPM) 1.90 @ 16,000
Weight (oz): 19.4
Recc.Props: 11x8-10, 12x7-11, 12.5x6-7

OS 91FX 2-Stroke Ringed Aircraft Type: Aircraft 19021

Displacement (cu in): 0.912
Bore (in): 1.091 in (27.7mm)
Stroke (in): 0.976 in (24.8mm)
RPM: 2,000-16,000
Output:
(BHP@RPM) 2.8 @ 15,000
Weight (oz): 19.3 oz (550g)
Recc.Props: 13x8-9

OS 160FX Type: Aircraft 19260

Displacement (cu in): 1.60 cu in (26cc)
Bore (in): 1.32 in (33.6mm)
Stroke (in): 1.16 in (29.6mm)
RPM: 1800-10,000
Output:
(BHP@RPM) 3.7 bhp (ps) @ 9000 rpm
Weight (oz): 32.6 oz 925g

OS FS 30 4 Stroke 33000

Displacement: 0.299 cu in (5cc)
Bore: 0.767 in (19.5mm)
Stroke: 0.648 in (16.4mm)
Practical rpm range: 2,500-13,000
Output: 0.5 hp @ 10,000 rpm
Weight: 9.2 oz (261g) w/o muffler; 9.8 oz (278g) w/muffler
Includes: muffler, glow plug

OS FS 52S 4 Stroke 34200

Displacement: 0.523 cu in (8.56cc)
Bore: 0.906 in (23.0mm)
Stroke: 0.811 in (20.6mm)
Practical rpm range: 2,500-13,000
Output: 0.9ps @ 12,000 rpm
Weight: 14.19 oz (402g) w/o muffler
Includes: muffler, glow plug

OS FS FL70 34800

Displacement: 0.699 cu in (11.5 cc)
Bore: 1.09 in (27.7 mm)
Stroke: 0.748 in (19.0 mm)
Practical rpm range: 2,300-12,000
Output: 1.1 hp @ 11,000 rpm
Weight: 16.5 oz (470 g)
Includes: 60W airbleed carburetor, F-4030 silencer, #F glow plug
Recommended Props: Sport & Aerobatic - 12x7, 12.5x7, 13x6; Trainer & Scale - 12.5x7, 13.6x7

OS FS 70 Ultimate 34710

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It's the new pinnacle of performance for today's aerobats! The FS-70 Ultimate 4-stroke powerhouse promises smoother, more consistent muscle, thanks to an ingenious pump system that offers consistent fuel delivery, regardless of the plane's attitude. And amazingly, this “pumped-up” power comes from an engine that weighs less than the FS-70 II engine without a pump

SPECIFICATIONS
Displacement: 0.698 cu in (11.45cc)
Bore: 1.091 in (27.7mm)
Stroke: 0.748 in (19.0mm)
Practical rpm range: 2,000-13,000
Output: 1.2 hp @ 11,000 rpm
Weight: 16.4 oz (465g); Weight w/all parts included: 17.7 oz (502g)

OS FS-91 Surpass w/pump 35910

Pump feature adds responsiveness to the FS-91 Surpass
New regulating style pump, normally only found in 1.20 class engines, delivers better response and reliability

Rear ball bearing is rubber-sealed on both sides and greased internally to help inhibit bearing corrosion

The crankshaft, cam shaft and piston ring are all plated to further resist corrosion

Features a reversible carb which allows the needle valve to face either the left or right side of the engine

Black anodized rocker cover

A large-volume muffler offers better noise reduction for milder sound

SPECIFICATIONS
Displacement: 0.912 cu in (14.95 cc)
Bore: 1.091 in (27.7 mm)
Stroke: 0.976 in (24.8 mm)
Practical rpm: 2,000-12,000
Output: 1.6 hp @ 11,000 rpm
Weight w/muffler & manifold: 23.9 oz. (678g)
Weight w/o muffler & manifold: 22.2 oz. (630g)

OS FS120E

O.S. developed the Surpass Series of 4-stroke engines for discerning fliers who demand more power. Able to swing larger props and supply more usable horsepower, Surpass 4-strokes provide the best performance for your plane, regardless of scale or flying style

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