The Shvetsov M-11 is a five-cylinder air-cooled radial aircraft engine produced in the Soviet Union between 1923 and 1952.
Design and development
The Shvetsov M-11 was designed under a 1923 competition in the Soviet Union for a new engine to power trainer aircraft. It is a single-row five-cylinder air-cooled radial piston engine with aluminum cylinder heads. Like the American Kinner B-5 5-cylinder radial of similar size, the M-11 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 M-11 engine had a power output of 100 hp (73 kW), the newer M-11D variant was higher at 125 hp (92 kW). The ultimate version, M-11FR, introduced in 1946, increased power 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.
Variants
Data from:
M-100: Designation of prototype and initial designs.
M-11:Initial production version at , compression ratio 5:1
M-11a: /
M-11/A: /
M-11B: /
M-11D: /
M-11E:Compression ratio 6:1 - /
M-11F: /
M-11FM:
M-11FR:Compression ratio 5.5:1 - /
M-11FR-1:Compression ratio 5.5:1 - /
M-11FN:
M-11G: /
M-11I:Compression ratio 5.5:1 - /
M-11K: /
M-11L: /
M-11M:
M-11V: /
M-11Ya:A projected development of the M-11 at GAZ-41. The prototype was run but results were unsatisfactory, re-designated M-12
M-11Ye:Developed by Okromechko
Further developments
3M-11: An alternative designation for the M-50 three cylinder derivative of the M-11
M-12: A development of the M-11 by M.A. Kossov, un-related to the NAMI-100, which had been earlier designated M-12.
M-12 (M-11Ya):A projected development of the M-11 at GAZ-41. The prototype was run but results were unsatisfactory, re-designated from M-11Ya
M-13 (M-13K): A 1944 development by M.A. Kossov to be assembled from various M-11 variants
M-13: In parallel with the M-13K, E.V. Urmin at GAZ-41 mated cylinders from the M-11D with new crankshaft and crankcase
M-13: A later M-13 was created by I.A. Muzhilov at OKB-41 in 1946. Despite passing state acceptance test in June 1948, this engine was not put into production.
M-48:A 7-cylinder further development at GAZ-29
M-49:A 9-cylinder further development at GAZ-29 /
M-50:A 3-cylinder further development at GAZ-29
M-51:A 5-cylinder further development at GAZ-29 /
MG-11:Development of the M-51 at the NIIGVF (Nauchno-Issledovatel'skiy Institut Grazdahnskovo Vozdooshnovo Flota - civil air fleet scientific test institute) by M.A. Kossov. /
MG-21:Development of the M-48 at the NIIGVF by M.A. Kossov. /
MG-31:Development of the M-49 at the NIIGVF by M.A. Kossov. /
MG-50: A projected 18 cylinder, two-row radial derived from M-11 components by M.A. Kossov. /
Applications
The M-11 powered a number of Soviet, Bulgarian and Polish aircraft. The M-11 remained in production until 1952 with an estimated total of over 100,000 engines made. Several hundreds of M-11D and M-11FR-1 variants were manufactured under license in the Polish WSK-Kalisz works in Kalisz. It was also used for the up-engined GAZ-98K aerosani winter-used sled in a pusher configuration, and as the standard powerplant for the similar NKL-26 propeller-driven sledges during the World War II years.
Specifications (M-11A)
See also
References
Notes
Bibliography
- Gunston, Bill. World Encyclopedia of Aero Engines. Cambridge, England. Patrick Stephens Limited, 1989.
- Kotelnikov, Vladimir. Russian Piston Aero Engines. Marlborough, Wiltshire. The Crowood Press Ltd. 2005. .