Pratt and Whitney R-4360 Engine

The R-4360 is a 28-cylinder air-cooled radial engine which produces a maximum of 3,800 hp. and weighs about 3,500 pounds (1,575 kg.). R-4360s have been used to power various post-WWII USAF bombers, cargo/transports, and aerial tankers, including B-50, KB-50, B-36, C-97, KC-97, C-119, and C-124 aircraft. It represents the most technically advanced and complex reciprocating aircraft engine produced in large numbers in the United States. The passing of the KC-97 and C-97 series aircraft from Air Force inventory in the late 1970s marked the closing of the era of both the large piston engine and the turbo-supercharger within the USAF.