Schwezow M-11

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Schwezow M-11F

The Shvetsov M-11 was an air-cooled five-cylinder - radial engine of Soviet production. It appeared in 1925 and was the first aircraft engine developed in the Soviet Union that went into series production.

history

The aircraft engine was developed at the Moscow State Aircraft Plant No. 4 (GAS-4) on the basis of a design competition for aircraft engines for use in sports and training aircraft , which was announced at the end of 1923 . On November 4, 1925, the testing of the first test model began and after a few changes, the engine with 73 kW (100 HP) continuous output received type approval for aviation in 1927 . The first ten units of the first series M-11a were delivered from Plant No. 29 in Zaporozhye in August and December 1929. 32,304 units had been produced in the plant by 1937. In 1935, construction of the M-11G began in parallel in the Voronezh plant No. 16. The output of this plant exceeded that of the parent plant by the end of 1936 and the construction group under Arkady Nazarow, which had moved from Zaporozhye to Voronezh, continuously improved the drive. When the demand for engines skyrocketed after the beginning of the war , Plant No. 41 in Moscow, actually a supplier, was included in the production and received its own design office under the direction of Ivan Muschilov. Production at Plant No. 16 continued after the evacuation during the war in Andishon . Reopened as Plant No. 154 in Voronezh, production continued there until the program was discontinued and in recent years has comprised around 1,300 pieces per year. The Zaporozhye plant was relocated to Omsk in 1942 . From 1946 onwards, production in Plant No. 478 was continued on the old site until 1949.

The engine, originally called Schwezow M-100, was manufactured between 1929 and 1955 in around 125,000 units of the various series. The M-11D was built under license by Poland in 1947 and 1948, and in China the M-11FR was in production from the early 1950s to around 1960.

construction

The cylinder heads were made from an aluminum alloy. The OHV valve control was more complex than with radial engines with a cam drum : in the Schwezow M-11 each of the five cylinder heads had a camshaft that was controlled by a gearbox. Initially, the engine had an MTBO of just 50 hours.

variants

Schwezow M-11K in the foreground and installed in a Jak-18
  • M-11a: first production version from 1929 with 40 hours running time until overhaul
  • M-11B: second series version with changes to slide bearings, cylinders and oil pump with an operating time increased to 150 hours
  • M-11G: Version with 110 PS (81 kW) from 1934 and first version with components manufactured exclusively in the country, plus additional changes, over 15,000 units built
  • M-11E: performance-enhanced version with 160 hp (118 kW), only produced in small numbers due to unreliability
  • M-11D: variant from 1939 with increased speed and running time (up to 600 hours), starting power 125 HP (92 kW), production until 1947
  • M-11F: performance-enhanced version due to an increased degree of compression from 1940 with 145 HP (107 kW), developed by Michail Koslow in plant no.16 and series production from October 1942
  • M-11M: Further development of the M-11F from 1943 with a new housing and 145 PS (107 kW)
  • M-11FM: Version of the M-11M for the use of adjustable propellers from May 1944 with 200 HP (147 kW), no series production
  • M-11FR: Model from 1943 for the use of adjustable propellers with 160 HP (118 kW), developed by Alexander Ivchenko
  • M-11FR-1: variant developed from the M-11D for the use of controllable pitch propellers with 160 HP (118 kW); Tested from the beginning of 1946, state acceptance in September and series production from mid-1947
  • M-11FN: 200 HP (147 kW)
  • M-11K: reduced power post-war version for use in the Po-2 with 125 PS (92 kW)

Technical specifications

Parameter Data (M-11a) Data (M-11B) Data (M-11W) Data (M-11G) Data (M-11D) Data (M-11K) Data (M-11L) Data (M-11FR-1) Data (M-11FR)
Start of production 1929 1930 1933 1934 1939 1947 1948
drilling 125 mm
Hub 140 mm
Displacement 8.6 l
Compression ratio 5.0: 1 5.5: 1
Starting power 110 hp (81 kW) at 1650 rpm 125 hp (92 kW) at 1760 rpm 125 PS (92 kW) at? 160 PS (118 kW) at 1900 rpm
Continuous output 100 hp (74 kW)
Dry matter 160 kg 165 kg 160 kg 158 kg 164 kg 180 kg

commitment

Jakowlew UT-2 with M-11
Maintenance of the M-11 engine of a Polikarpow Po-2
M-11 to drive a Shavrow Sch-2

See also

literature

  • Vladimir Kotelnikov: The large family of the M-11. In: Aviation Classics. No. 2/2020, Motor Presse Stuttgart, pp. 40-47.

Web links

Commons : Schwezow M-11  - Collection of images, videos and audio files

Individual evidence

  1. ↑ Ulf Gerber: The great book of Soviet aviation 1920–1990. Rockstuhl, Bad Langensalza 2019, ISBN 978-3-95966-403-5 , p. 349 ff.