Question: The Shvetsov ASh-82 (M-82) is a Soviet 14-cylinder, two-row, air-cooled radial aircraft engine developed from the Shvetsov M-62, the M-62 was the result of development of the M-25, which was a licensed version of which American engine?
Sentence (from "Nakajima Ha5"): The Ha-5 had separate cam-discs for the front and rear rows of cylinders like American designs, rather than using a single, front-mounted cam-disc with long and short pushrods to operate both rows of cylinder valves.
Relevant evidence: No