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OS
TYPE-1
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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.'
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OS
TYPE-3
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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.
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MAX-1
15
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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.
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ROTARY
ENGINE 1-49
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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.
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MAX-40SR
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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.
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FS-60
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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.
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FT-120
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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.
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FS-120S-SP
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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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