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SHVETSOV M11-D RADIAL ENGINES

The M-11 powered a number of Russian, Bulgarian and Polish aircraft and remained in production until 1952.  More than 100,000 engines were made.  Several hundreds of M-11D and M-11FR-1 variants were manufactured under license in the Polish WSK-Kalisz works

M11-D RADIAL

Arkadiy Dmitrievich Shvetsov was a Soviet aircraft engine designer whose OKB was founded in Perm, USSR, in 1934.  Shvetsov became the primary provider of radial piston engines for the Soviet aircraft industry.

The Shvetsov M-11 was designed from a competition for a new engine to power trainer aircraft. It consists of a five-cylinder air-cooled radial piston engine with aluminum cylinder heads.  It had individual camshafts for each cylinder, operating the pushrods, rather than a single central cam ring.

The initial versions of the M-11 suffered from a short service life of only 50 hours.  The basic engine had a power output of 100hp and the newer D variant was 125hp.

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