market. In June 1946 Boeing proposed their Model 462 to fill the requirement, featuring six T35 engines, later reduced to four in a series of redesigns. However, by 1948 advances in airframe design, particularly the introduction of the swept wing, allowed the bomber to move to jet power, eventually leading to the B-52 Stratofortress. Work on the J37/T35 continued until July 1953, by which point three engines had been delivered to the USAF. The Air Force turned over the engines and all collected data to the industry as a whole. No further interest was forthcoming and the project ended after an estimated $4.5 million (~30 million year 2000 dollars) had been spent. References Notes Bibliography Kay, Antony. Turbojet: History and Development 1930–1960, Vol. 2. The Crowwood Press, 2007. Norton, Bill. U.S. Experimental & Prototype Aircraft Projects: Fighters 1939–1945. North Branch, Minnesota: Specialty Press, 2008, pp. 80–85. . 1940s turbojet engines Abandoned military aircraft engine projects of the United States Lockheed Corporation