This new 7 cylindered rotary engine had the power of 50 hp. With this new engine, France became the leader of the world's aviation technology in those days.
During the WWI, the three 9 cylindered models, Le Rhone 80-100 hp. Gnome Monosoupage 100 hp, and Clerget 9z 110 hp were manufactured in France, and many of them were exported as the light weighted but powerful aircraft engines. Those rotar engines were characterized with that the engine body itself worked as the fly-wheel and was powerful compared to its light weight. The engine cowling which was designed to prevent oil from splashing around the engine became an ideal nose fairing to reduce air resistance. Therefore, not only France but also England, Germany, USA and Italy used this type of engine for their newest fighters in the early stage of the WWI.
The Sopwith 1F. 1 Camel, built in 1917, was a small dog fighter equipped with the Clerget 9B 130 hp, and this excellent fighter soon became the main power of the Royal Air Force. The Clerget 9B 130 hp was an improved version of the 9Z originally designed by Clerget Blin & Cie in Paris, and was manufactured under licence at Gwynness factory of Hammersmith Iron Works in London. The sister models Clerget 9Z 110 hp and 9F 130hp were made in France, and the modified 9BF 140 hp was British-French made. There engines were used for many other British and French military aircrafts.
Spec
Power : 130 hp (at 1,250 r.p.m.)
Bore : 120 mm
Stroke : 160 mm
Weight : 172.8 kg
Weight/hp :1.33 kg
Max. diameter : 1,022 mm
Overall length : 711 mm
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