Aircraft engine: Shvetsov ASh-62IR
|Displacement||29.9 l (1,769.7 cu in)|
|Propeller reduction gear ratio||0.687|
|Weight||567 kg (1,250 lb)|
|Maximum power||1,000 hp at 2,200 RPM|
|Cruise power||840 hp at 2,100 RPM|
A development of the American Cyclone engine, designed in the USSR, licence-built in Poland.
The engine was designed by a team led by Arkadiy Dmitrievich Shvetsov. The design originates from American Wright R‑1820 Cyclone engine, which was licence-built in USSR since 1932 under the designation M‑25. The upgraded M‑62 (with reshaped suction manifolds, improved supercharger, and increased compression ratio) appeared in 1937 and was built in large quantities for military and civil aviation. In 1941 the designation was changed to ASh‑62. After World War II, as a result of technological improvements leading to increased reliability and service life, the ASh‑62IR version was developed.
Since 1961 the engine has been licence-built in Poland at the WSK PZL-Kalisz, where it has undergone further modifications. Modified, more powerful versions are designated K9-AA, K9‑BA i K9‑BB. The ASh‑62 and the K‑9 engines were fitted to the Li‑2, An‑2 and the PZL M‑18 Dromader aircraft.