The Wright R3350 was a twinrow, 18cylinder radial engine that was developed from the Wright R10 Cyclone and was one of the most powerful radial engines produced in the United States Work on the engine began in January 1936 and the first R3350 was run in May 1937The AD6 was an improved AD4B with improved lowlevel bombing equipment, and the final production version AD7 was upgraded to an RWB engine For service in Vietnam, USAF Skyraiders were fitted with the Stanley Yankee extraction system, 8 which acted in a similar manner to an ejection seat, though with twin rockets extracting the Engine Index Allison to CurtissWright;
Wright R 3350 Duplex Cyclone Wikiwand