O.S. – What a History

OS TYPE-1Type 1 photo

In 1936, Shigeo Ogawa set up his original machine-shop, making model steam engines. In the same year, at the suggestion of an American buyer, Paul Houghton, the 1.6 cc O.S. Type-1 miniature gasoline engine was constructed. Some 200 production models were subsequently exported under the brand name ‘Pixie.’
OS TYPE-3Type 3 photo

The Type-1 followed American model i.c. engine design of the time. It was succeeded, in 1937, by the much larger (6.92 cc) Type-2 and, in 1938, by the 7.45 cc Type-3, an original O.S. design which set the ground work for future O.S. engine development.
MAX-1 15Max 15 photo

The first of a long line of O.S. ‘MAX’ engines, the MAX-1 29 and MAX-1 35 appeared in 1954, followed by the MAX-1 15 in 1955. In 1956, a MAX-1 15 powered model, flown by Ronald Draper, won the official (FAI) World Free Flight Championship held in England. This drew worldwide attention to O.S. engines and became the turning point that led, eventually, to O.S. prominence in the world market.
ROTARY ENGINE 1-49Wankel photo

This unique rotary combustion engine received international acclaim as the world’s first production model miniature Wankel type power unit. Refined over many years of development, it is smooth running and powerful and remains the only regular production model engine of this type.
MAX-40SR40 SR photo

The special O.S. designed machinery built for the complex high-precision machining operations essential to the success of the O.S. Rotary Engine, raised O.S. production technology to new levels. This proved invaluable in the manufacture of all subsequent O.S. engines, beginning with the high performance 6.5 cc Schnuerle-scavenged MAX-40SR of 1973.
FS-60FS 60 photo

This 10 cc overhead-valve engine was the first volume-produced four-stroke-cycle model aircraft power unit. Very much quieter than equivalent two-stroke engines, it was widely accepted for its “environmental friendliness” and resulted in many other manufacturers introducing four-stroke engines – though not all were as quiet.
FT-120FT-120 photo

This 20 cc four-stroke was the first O.S. twin cylinder engine and was the starting point for the current range of superb multi-cylinder scale-type power units, including horizontally-opposed four-cylinder and radial type five-cylinder models. Ideal for large scale aircraft, they are flexible and outstandingly smooth running.

O.S. Speed B2101 Engine

There is so much more history to be told, but that gives you a little dose of how O.S. began and how far they’ve come.  Should it be any wonder why they’re considered among the best, most reliable engines in the world?  And with that kind of history, is it any wonder that O.S. holds the record for most IFMAR 1/8 Scale World Championship wins of any brand?

That record continued in 2014 when Ty Tessmann powered to the IFMAR Worlds podium with the O.S. Speed B2101, paired with the performance-boosting T-2090SC Tuned Pipe.  And 2015 is shaping up to be a good as well!

It includes faster acceleration off the starting line and out of corner’s…a low CG for stability and predictable handling…and throttle response so immediate, the power seems to flow right from your fingers.

Designed specifically for maximum power output, performance and tune-ability in 1/8 scale buggy applications.  Machined cylinder head with laser-etched Speed Tuned graphics lowers the center of gravity and improves cooling.  Features a DLC-coated crankshaft balanced with tungsten weights and the efficient, reliable 21J carburetor.

Let’s take a closer look and then you should really head on over to the O.S. Facebook page and let them know what you think about the engine and ask any questions you have about tuning, maintenance, cleaning, reliability or whatever else comes to mind.


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