The Shvetsov M-71 was a
Soviet
The Soviet Union,. officially the Union of Soviet Socialist Republics. (USSR),. was a List of former transcontinental countries#Since 1700, transcontinental country that spanned much of Eurasia from 1922 to 1991. A flagship communist state, ...
radial engine
The radial engine is a reciprocating type internal combustion engine configuration in which the cylinders "radiate" outward from a central crankcase like the spokes of a wheel. It resembles a stylized star when viewed from the front, and is ca ...
built in small numbers during
World War II
World War II or the Second World War, often abbreviated as WWII or WW2, was a world war that lasted from 1939 to 1945. It involved the vast majority of the world's countries—including all of the great powers—forming two opposin ...
. It was derived from the
Shvetsov M-25
The Shvetsov M-25 was an aircraft radial engine produced in the Soviet Union (USSR) in the 1930s and 1940s, a licensed production variant of the Wright R-1820-F3.
Design and development
The first M-25s were produced from kits imported from the ...
, which was a license-built copy of the American
Wright R-1820-F3 Cyclone engine.
Development
The M-71 was developed from the Shvetsov M-70, a failed attempt at a two-row version of the single-row Wright R-1820 Cyclone. It used components from the
Shvetsov M-63
The Shvetsov ASh-62 (Russian: АШ-62, designated M-62 before 1941) is a nine-cylinder, air-cooled, radial aircraft engine produced in the Soviet Union. A version of this engine is produced in Poland as the ASz-62 and the People's Republic of Ch ...
, which was an improved version of the M-25 with more horsepower than the original. Development began at the beginning of 1939 and it was bench tested that August, but did not pass its State acceptance tests until the autumn of 1942. It weighed and produced . It was flight-tested in a
Polikarpov I-185
The Polikarpov I-185 was a Soviet fighter aircraft designed in 1940. It was flown with three engines but all of them were either insufficiently developed for service use or their full production was reserved for other fighters already in producti ...
prototype fighter in March–April 1942.
A boosted version, the M-71F, was built in small numbers. It was flown in the prototypes of the single-engined
Sukhoi Su-6
The Sukhoi Su-6 was a Soviet ground-attack aircraft developed during World War II. The mixed-power (rocket and piston engines) high-altitude interceptor Su-7 was based on the single-seat Su-6 prototype.
Design and development
Development of th ...
and the twin-engined
Sukhoi Su-8 ground-attack aircraft in 1943–44 as well as the
Lavochkin La-7
The Lavochkin La-7 (russian: Лавочкин Ла-7) was a piston-engined single-seat Soviet fighter aircraft developed during World War II by the Lavochkin Design Bureau. It was a development and refinement of the Lavochkin La-5, and the la ...
fighter in 1944. A version of the M-71F was developed with two TK-3
turbocharger
In an internal combustion engine, a turbocharger (often called a turbo) is a forced induction device that is powered by the flow of exhaust gases. It uses this energy to compress the intake gas, forcing more air into the engine in order to pro ...
s and flight tested in the
DVB-102 high-altitude bomber designed by
Vladimir Myasishchev during the summer of 1943. Evaluations of the M-71 were generally favorable, but no production capacity was available to use for a brand-new engine during the war.
[Kotelnikov, p. 129]
Specifications (M-71F)
See also
References
Notes
Bibliography
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{{DEFAULTSORT:Shvetsov M-71
1930s aircraft piston engines
Aircraft air-cooled radial piston engines
Shvetsov aircraft engines