Shvetsov ASh-82

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Shvetsov ASh-82 in Aviation Museu Kbely, Prague

The Shvetsov ASh-82 (M-82) is an air-cooled radial piston engine developed from Shvetsov M-62, itself a licensed version of the Wright R-1820 Cyclone. It entered production in 1940 and saw service in a number of Soviet aircraft. It powered Tupolev Tu-2 and Pe-8 bombers and when the inline engine-powered LaGG-3 was adapted for ASh-82, the famous Lavochkin La-5 and Lavochkin La-7 fighters were created. Over 70,000 ASh-82 were built.

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Family tree of Shvetsov engines

Variants

• ASh-82-111 (M-82-111) - First mass-produced ASh-82, with carburettors and one two-speed supercharger. This engine had lubrication and carburettor problems in extreme cold conditions.
• ASh-82-112 (M-82-112) - Improved M-82-111 with longer Time between overhaul (TBO) and better reliability. Redesigned carburettors, oil pumps, gear, turbocharger and reinforced pushrods. This engine worked better in the harsh Russian winter.
• ASh-82F (M-82F) - Identical to ASh-82 except for longer Time between overhaul and improved cooling and lubrication which allowed unlimited operation at takeoff power.
• ASh-82FN (M-82FN) - ASh-82F with direct fuel injection, power output increased to 1,230 kW (1,650 hp) for takeoff with only a 30 kg (65 lb) increase in engine weight, used by Pe-8 long-range bombers and Lavochkin La-7 fighters.
• ASh-82FNU (M-82FNU) - Improved M-82FN with more boost pressure and RPM, power output increased to 1,380 kW (1,850 hp). After all the improvements, the ASh-82FN and ASh-82FNU were two of the most sturdy radial engines of the war.
• ASh-21 (M-21) - Single-row 7-cylinder version of ASh-82 for Yakovlev Yak-11 trainer, entered production in 1946.
• ASh-82T (M-82T) - New version of the Ash-82FN and Ash-82FNU developed in early fifties, updated fuel injection system and improved specific fuel consumption. Power increased to 1,700 hp (1,268kW) or 1,900 hp (1,417 kW).
• ASh-82V (M-82V) - Helicopter version of the ASh-82T developed in 1952, with axial-flow fan mounted in the fuselage's front. The engine was connected to a R-5 two-stage planetary primary gearbox with the help of a shaft (which was between the pilots seats). This engine was used in the Mi-4 and Jak-24 helicopters
• ASh-2TK & ASh-2K (ASh-4K) – Four-row versions of the Ash-82, developed in the late ‘40. The engine concept was similar to the Pratt & Whitney R-4360. The Shvetsov design bureau took into consideration all available information about the R-4360 and developed an engine with less maintenance operations, longer time between overhaul, direct fuel injection and a simplier supercharging system. The engine had 82.4 liters (5,030 cu in) and 4,000 HP (2,985 kW) at 2,600 RPM (dry). The Ash-2K (ASh-4K) version had 4,700 HP (3.507 kW) wet, with a water-methanol system. For political reasons, these engines were prematurely installed in Tupolev Tu-4LL testbeds at the end of 1950, when the prototypes' initial tests had barely begun. The engines had mature and overheating problems, and required a long testing period. Most of the flaws were fixed in the mid-fifties, but the production was cancelled: in those days, the priority for the Soviet Air Force were turboprop and jet engines.

Applications

File:Shvetsov.jpg

Family tree of Shvetsov engines

• Amtorg KM-2 (Improved PBY Catalina, built under Consolidated license)
• Gudkov Gu-82 (Prototype)
• Ilyushin Il-2 (prototype)
• Ilyushin Il-12
• Ilyushin Il-14
• Kocherigin OPB-5 (prototype)
• Lavochkin La-5
• Lavochkin La-7
• Lavochkin La-9
• Lavochkin La-11
• MiG-5
• MiG-9 I-210 (1941 Prototype)
• Petlyakov Pe-2
• Petlyakov Pe-8
• Polikarpov I-185 (Prototype)
• Sukhoi Su-2
• Sukhoi Su-7
• Sukhoi Su-12
• Tupolev Tu-2
• Yakovlev Yak-24

Specifications (ASh-82)

This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Shvetsov ASh-82".