The Armstrong Siddeley Leopard was a British 14-cylinder twin-row air-cooled
radial
Radial is a geometric term of location which may refer to:
Mathematics and Direction
* Vector (geometric)
In mathematics, physics, and engineering, a Euclidean vector or simply a vector (sometimes called a geometric vector or spatial vector) ...
aero engine developed in 1927 by
Armstrong Siddeley
Armstrong Siddeley was a British engineering group that operated during the first half of the 20th century. It was formed in 1919 and is best known for the production of luxury vehicles and aircraft engines.
The company was created following ...
. It was the most powerful radial engine in the world when introduced.
Variants
;Leopard I
:700 hp, medium supercharged. Direct drive propeller.
;Leopard II
:700 hp, geared epicyclic drive.
;Leopard III
:800 hp, two-valve cylinder head, direct drive.
;Leopard IIIA
:800 hp, geared epicyclic drive.
Applications
*
Blackburn Iris
The Blackburn Iris was a British three-engined biplane flying boat of the 1920s. Although only five Irises were built, it was used as a long-range maritime reconnaissance aircraft by the Royal Air Force, where it equipped a squadron for four ye ...
*
Junkers Ju 52
The Junkers Ju 52/3m (nicknamed ''Tante Ju'' ("Aunt Ju") and ''Iron Annie'') is a transport aircraft that was designed and manufactured by German aviation company Junkers.
Development of the Ju 52 commenced during 1930, headed by German Aeros ...
*
Hawker Dantorp
The Hawker Dantorp H.B. III was a Danish single-engined biplane bomber of the 1930s. The aircraft was a development of the British Hawker Horsley designed for the Danish Navy, but differed in being powered by a radial engine and having a third c ...
*
Hawker Horsley
The Hawker Horsley was a British single-engined biplane bomber of the 1920s. It was the last all-wooden aircraft built by Hawker Aircraft, and served as a medium day bomber and torpedo bomber with Britain's Royal Air Force between 1926 and 1935 ...
[Mason 1991, p. 138.]
Specifications (Leopard I)
See also
References
Notes
Bibliography
* Lumsden, Alec. ''British Piston Engines and their Aircraft''. Marlborough, Wiltshire: Airlife Publishing, 2003. .
* Mason, Francis K. Hawker Aircraft since 1920 (third ed.). London: Putnam, 1991. .
* Smith, Herschel. ''Aircraft Piston Engines''. New York, New York: McGraw-Hill, 1981. .
{{ASaeroengines
1920s aircraft piston engines
Aircraft air-cooled radial piston engines
Leopard
The leopard (''Panthera pardus'') is one of the five extant species in the genus '' Panthera'', a member of the cat family, Felidae. It occurs in a wide range in sub-Saharan Africa, in some parts of Western and Central Asia, Southern Russia, a ...