On 5 June 1946, Boeing's Model 462, a straight-wing aircraft powered by six Wright T35 turboprops with a gross weight of 360,000 pounds (160,000 kg) and a combat radius of 3,110 miles (2,700 nmi, 5,010 km), was declared the winner. On 13 February 1946, the USAF issued bid invitations for these specifications, with Boeing, Consolidated Aircraft, and Glenn L. The armament was to consist of an unspecified number of 20 mm cannon and 10,000 pounds (4,500 kg) of bombs. The aircraft was to have a crew of five or more turret gunners, and a six-man relief crew. On 23 November 1945, Air Materiel Command (AMC) issued desired performance characteristics for a new strategic bomber "capable of carrying out the strategic mission without dependence upon advanced and intermediate bases controlled by other countries". After being upgraded between 20, the last airplanes are expected to serve into the 2050s. The B-52 completed 60 years of continuous service with its original operator in 2015. Superior performance at high subsonic speeds and relatively low operating costs have kept them in service despite the advent of later, more advanced strategic bombers, including the Mach 2+ Convair B-58 Hustler, the canceled Mach 3 North American XB-70 Valkyrie, the variable-geometry Rockwell B-1 Lancer, and the stealth Northrop Grumman B-2 Spirit. The bombers flew under the Strategic Air Command (SAC) until it was disestablished in 1992 and its aircraft absorbed into the Air Combat Command (ACC) in 2010, all B-52 Stratofortresses were transferred from the ACC to the new Air Force Global Strike Command (AFGSC). As of June 2019, there are 76 aircraft in inventory 58 operated by active forces ( 2nd Bomb Wing and 5th Bomb Wing), 18 by reserve forces ( 307th Bomb Wing), and about 12 in long-term storage at the Davis-Monthan AFB Boneyard. The B-52 has been in service with the USAF since 1955. The B-52's official name Stratofortress is rarely used informally, the aircraft has become commonly referred to as the BUFF (Big Ugly Fat Fucker/Fella). A veteran of several wars, the B-52 has dropped only conventional munitions in combat. Built to carry nuclear weapons for Cold War-era deterrence missions, the B-52 Stratofortress replaced the Convair B-36 Peacemaker. The B-52 took its maiden flight in April 1952. īeginning with the successful contract bid in June 1946, the B-52 design evolved from a straight wing aircraft powered by six turboprop engines to the final prototype YB-52 with eight turbojet engines and swept wings. The bomber is capable of carrying up to 70,000 pounds (32,000 kg) of weapons, and has a typical combat range of around 8,800 miles (14,080 km) without aerial refueling. It has been operated by the United States Air Force (USAF) since the 1950s. The B-52 was designed and built by Boeing, which has continued to provide support and upgrades. The Boeing B-52 Stratofortress is an American long-range, subsonic, jet-powered strategic bomber.
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