Shvetsov M-11

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Shvetsov M-11F
Shvetsov M-11F

The Shvetsov M-11 was designed under the 1923 competition for a new engine to power trainer aircraft. It is a single-row five-cylinder air-cooled radial piston engine with aluminum cylinder heads. Uniquely, pushrods actuating the valves were driven by individual cams on each cylinder rather than a single central cam. First versions of M-11 suffered from a short serice life of only 50 hours. The ultimate version, M-11FR, introduced in 1946, increased output to 160 hp at 1,900 rpm on takeoff and 140 hp at cruise and had provisions for a variable-pitch propeller, accessory drive (for vacuum pumps, compressors, generators, etc.) and featured a floatless carburetor. M-11 powered a number of aircraft, including Polikarpov Po-2, Yakovlev UT-1, Yakovlev UT-2, Yakovlev Yak-6, Yakovlev Yak-12, Yakovlev Yak-18 and Polish LWD Junak. M-11 remained in production until 1952 with an estimated total of over 100,000 engines made.

General characteristics

  • Type: 5-cylinder air-cooled radial engine
  • Bore:
  • Stroke:
  • Displacement: 8.6 L (525 in³)
  • Dry weight: 165 kg (363 lb)

Components

  • Cooling system: Air-cooled

Performance

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