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Developed during WWII the Pratt and Whitney R 4360 is the largest and most powerful mass produced piston engine in the United States. The R 4360 is a four row 28 cylinder, seven per row, air cooled radial engine and produced a maximum of 3000 to 4000 hp and weighed about 3,500Ibs. Almost 19,000 were...
Currently it looks like I am the only one around here who loves radial engines... This is an invitation to join the group, so it can stop being a "one man show".