Shvetsov M-11
The Shvetsov M-11 is a five-cylinder air-cooled radial aircraft engine produced in the Soviet Union between 1923 and 1952.[1]
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:[2]
- M-100
- Designation of prototype and initial designs.
- M-11
- Initial production version at Script error: No such module "convert"., compression ratio 5:1
- M-11a
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- M-11/A
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- M-11B
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- M-11D
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- M-11E
- Compression ratio 6:1 - Script error: No such module "convert". / Script error: No such module "convert".
- M-11F
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- M-11FM
- Script error: No such module "convert".
- M-11FR
- Compression ratio 5.5:1 - Script error: No such module "convert". / Script error: No such module "convert".
- M-11FR-1
- Compression ratio 5.5:1 - Script error: No such module "convert". / Script error: No such module "convert".
- M-11FN
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- M-11G
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- M-11I
- Compression ratio 5.5:1 - Script error: No such module "convert". / Script error: No such module "convert".
- M-11K
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- M-11L
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- M-11M
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- M-11V
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- 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 Script error: No such module "convert".
Further developments
- 3M-11
- An alternative designation for the M-50 three cylinder derivative of the M-11
- M-12
- A Script error: No such module "convert". 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 Script error: No such module "convert".
- M-49
- A 9-cylinder further development at GAZ-29 Script error: No such module "convert". / Script error: No such module "convert".
- M-50
- A 3-cylinder further development at GAZ-29 Script error: No such module "convert".
- M-51
- A 5-cylinder further development at GAZ-29 Script error: No such module "convert". / Script error: No such module "convert".
- 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. Script error: No such module "convert". / Script error: No such module "convert".
- MG-21
- Development of the M-48 at the NIIGVF by M.A. Kossov. Script error: No such module "convert". / Script error: No such module "convert".
- MG-31
- Development of the M-49 at the NIIGVF by M.A. Kossov. Script error: No such module "convert". / Script error: No such module "convert".
- MG-50
- A projected 18 cylinder, two-row radial derived from M-11 components by M.A. Kossov. Script error: No such module "convert". / Script error: No such module "convert".
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.
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Specifications (M-11A)
Data from Kotelnikov.[3]
General characteristics
- Type: 5-cylinder air-cooled radial engine
- Bore: 125 mm (4.92 in)
- Stroke: 140 mm (5.51 in)
- Displacement: 8.6 L (525 in3)
- Dry weight: 165 kg (363 lb)
Components
- Cooling system: Air-cooled
Performance
- Power output:
- 82 kW (110 hp) at 1,650 rpm for takeoff
- 75 kW (100 hp) cruise
- Specific power: 9.5 kW/L (0.21 hp/in3)
- Compression ratio: 5:1
- Power-to-weight ratio: 0.5 kW/kg (0.3 hp/lb)
See also
Comparable engines
- Armstrong Siddeley Genet
- Armstrong Siddeley Mongoose
- Kinner K-5
- Walter Vega
- Warner Scarab Junior
- Wright R-540
Related lists
References
Notes
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Bibliography
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- Gunston, Bill. World Encyclopedia of Aero Engines. Cambridge, England. Patrick Stephens Limited, 1989. Template:ISBN
- Kotelnikov, Vladimir. Russian Piston Aero Engines. Marlborough, Wiltshire. The Crowood Press Ltd. 2005. Template:ISBN.