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 of 2017). The Ash-62 was also produced in China. It is estimated that 40,361 were produced in the USSR. Polish-built ASz-62IR engines (Polish transcription of Russian name), by WSK "PZL-Kalisz" in
Kalisz, 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. From 2015 the ASz-62IR-16E was produced with electronic fuel injection, offering greater power and the possibility of running on commercial automotive fuel. The
M-63 was an improved version of the M-62 with the 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 due to a higher
compression ratio of 7.2:1 and a higher redline. ==Applications==