Shvetsov ASh-82
The Shvetsov ASh-82 (Russian: Швецов АШ-82), also known as the M-82, is a Soviet 14-cylinder, two-row, air-cooled radial aircraft engine developed from the Shvetsov M-62, which in turn was the result of development of the M-25, a licensed version of the Wright R-1820 Cyclone. == Design and development == Arkadiy Shvetsov re-engineered the Wright Cyclone design, through the OKB-19 design bureau he headed, for Russian aviation engine manufacturing practices and metric dimensions and fasteners, reducing the stroke, dimensions and weight.