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O.S. Engines
OS Motors The First Choice for
Quality, Durability and Performance
First to introduce a mass-produced 4-stroke engine, an
innovator in every phase of R/C engine production, O.S. also retains
a tradition of craftsmanship that pays off in durability and power. Each new
engine is the product of over two years of testing and design—and more than
two generations of R/C engine
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The O.S. Engines History
1936
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.' |
1938
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. |
1955
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 |
1970
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. |
1973
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. |
1976
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. |
1979
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. |
1990
A special high-performance version of the 20 cc single
cylinder FS-120S four-stroke, this engine has the addition of an O.S.
designed Roots type supercharger: the very first time that a genuine
supercharger has been fitted to a production model engine. Mr. Giichi
Naruke won the 1995 FAI F3A (aerobatics) World Championship using one of
these engines. |
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