Cirrus Engine
Encyclopedia
Cirrus Aero-Engines Limited was a British aircraft engine
manufacturer, known for their line of 4-cylinder air-cooled vertical inline engines for general aviation
use. The company traded between 1927 and 1931.
engines were originally built by ADC Aircraft
until Cirrus Aero Engines Limited was formed in 1927. The company became Cirrus Hermes in 1931 when it was bought by the Cirrus-Hermes Engineering Company and later became the Cirrus Engine Section of Blackburn & General Aircraft Limited
in 1934, and operated as a separate division until production ended in the post-World War II
era.
Cirrus's first product was the 90 hp (67 kW) Cirrus I, which passed its 50 hour type rating in 1925. It was the first air-cooled inline engine, a design that proved extremely popular for light aircraft. The basic layout was quickly copied by a number of other manufacturers. Later versions named the Cirrus II, and Cirrus III were produced each with slightly greater displacement, and power.
After purchase by Hermes the Cirrus Hermes I, II, III & IV were produced ranging in power from 105 hp to 140 hp depending on type. The later Cirrus engines were designed to run inverted.
Aircraft engine
An aircraft engine is the component of the propulsion system for an aircraft that generates mechanical power. Aircraft engines are almost always either lightweight piston engines or gas turbines...
manufacturer, known for their line of 4-cylinder air-cooled vertical inline engines for general aviation
General aviation
General aviation is one of the two categories of civil aviation. It refers to all flights other than military and scheduled airline and regular cargo flights, both private and commercial. General aviation flights range from gliders and powered parachutes to large, non-scheduled cargo jet flights...
use. The company traded between 1927 and 1931.
History
CirrusADC Cirrus
-See also:-Bibliography:* Gunston, Bill. World Encyclopaedia of Aero Engines. Cambridge, England. Patrick Stephens Limited, 1989. ISBN 1-85260-163-9...
engines were originally built by ADC Aircraft
ADC Aircraft
The Aircraft Disposals Company or Airdisco, was a British firm established in March 1920 to take advantage of the large number of World War I-surplus military aircraft on the market.-History:...
until Cirrus Aero Engines Limited was formed in 1927. The company became Cirrus Hermes in 1931 when it was bought by the Cirrus-Hermes Engineering Company and later became the Cirrus Engine Section of Blackburn & General Aircraft Limited
Blackburn Aircraft
Blackburn Aircraft Limited was a British aircraft manufacturer that concentrated mainly on naval and maritime aircraft during the first part of the 20th century.-History:...
in 1934, and operated as a separate division until production ended in the post-World War II
World War II
World War II, or the Second World War , was a global conflict lasting from 1939 to 1945, involving most of the world's nations—including all of the great powers—eventually forming two opposing military alliances: the Allies and the Axis...
era.
Cirrus's first product was the 90 hp (67 kW) Cirrus I, which passed its 50 hour type rating in 1925. It was the first air-cooled inline engine, a design that proved extremely popular for light aircraft. The basic layout was quickly copied by a number of other manufacturers. Later versions named the Cirrus II, and Cirrus III were produced each with slightly greater displacement, and power.
After purchase by Hermes the Cirrus Hermes I, II, III & IV were produced ranging in power from 105 hp to 140 hp depending on type. The later Cirrus engines were designed to run inverted.