The Shvetsov ASh-62 (designated M-62 before 1941) is a nine-cylinder, air-cooled, radial aircraft engine produced in the Soviet Union. A version of this engine is produced in the People's Republic of China as the HS-5.
Design and development
The ASh-62 was a development of the Wright R-1820 Cyclone that had been built in Russia under licence as the Shvetsov M-25, the main improvements including a two-speed supercharger and a more efficient induction system. Power was increased from the Cyclone's 775 hp to 1,000 hp. First run in 1937, licensed versions are still in production by WSK "PZL-Kalisz" in Poland as the ASz-62 (as of 2007). The Ash-62 was also produced in China. It is estimated that 40,361 were produced in the USSR.
Polish-built ASz-62IR engines are compatible with FAR-33 requirements. Further developments in Poland are the K9-AA, K9-BA and K9-BB engines, with take-off power of 1178 hp (860 kW), indicated power 698 kW.
The M-63 was an improved version of the M-62 with power output increased to 821 kW (1,100 hp) at 2,300 rpm for takeoff and 671 kW (900 hp) at 2,200 rpm at 4,500 m (14,764 ft) due to a greater compression ratio of 7.2:1 and a higher redline.
Family tree of Shvetsov engines
Data from 
- Type: Nine-cylinder single-row supercharged air-cooled radial engine
- Bore: 156 mm (6.12 in)
- Stroke: 175 mm (6.87 in)
- Displacement: 29.8 l (1,819 in³)
- Length: 47.76 in (1,213 mm)
- Diameter: 54.25 in (1,378 mm)
- Dry weight: 560kg (1,235 lb)
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- Venik's Aviation
- Kotelnikov, Vladimir (2005). Russian Piston Aero Engines. Crowood Press Ltd. pp. 119–122.
- Liss, Witold (1966). The Polikarpov I-16 (Aircraft in Profile Number 122). Profile Publications Ltd.