Shvetsov M-71
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The Shvetsov M-71 was a
Soviet The Union of Soviet Socialist Republics. (USSR), commonly known as the Soviet Union, was a List of former transcontinental countries#Since 1700, transcontinental country that spanned much of Eurasia from 1922 until Dissolution of the Soviet ...
radial engine The radial engine is a reciprocating engine, reciprocating type internal combustion engine, internal combustion engine configuration in which the cylinder (engine), cylinders "radiate" outward from a central crankcase like the spokes of a wheel. ...
built in small numbers during
World War II World War II or the Second World War (1 September 1939 – 2 September 1945) was a World war, global conflict between two coalitions: the Allies of World War II, Allies and the Axis powers. World War II by country, Nearly all of the wo ...
. It was derived from the Shvetsov M-25, 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, 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 and the twin-engined
Sukhoi Su-8 The Sukhoi Su-8 or DDBSh ( - Twin-engine two-seat armored ground attack aircraft) was a Soviet Union, Soviet prototype attack aircraft, ground-attack aircraft of World War II. Development While Sukhoi was perfecting the light Sukhoi Su-6 attack ...
ground-attack aircraft in 1943–44 as well as the Lavochkin La-7 fighter in 1944. A version of the M-71F was developed with two TK-3
turbocharger In an internal combustion engine, a turbocharger (also known as a turbo or a turbosupercharger) is a forced induction device that is powered by the flow of exhaust gases. It uses this energy to compress the intake air, forcing more air into th ...
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

* {{DEFAULTSORT:Shvetsov M-71 1930s aircraft piston engines Aircraft air-cooled radial piston engines Shvetsov aircraft engines