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The Boeing B-52 Stratofortress is an American long-range, subsonic, jet-powered strategic bomber. The B-52 was designed and built by Boeing , which has continued to provide support and upgrades. It has been operated by the United States Air Force (USAF) since the 1950s, and NASA for nearly 50 years.
A Boeing 747-400's main landing gear. Note the toes-up bias angle of the bogies on the wing gear, to ensure correct stowage upon retraction: 707, 720, 757, 767, 787: 10 wheels [1x2]+[2x4] A Boeing 757-200 from British Airways: 777: 14 wheels [1x2]+[2x6] A Boeing 777-200 from United Airlines.
The landing gear represents 2.5 to 5% of the maximum takeoff weight (MTOW) and 1.5 to 1.75% of the aircraft cost, but 20% of the airframe direct maintenance cost. A suitably-designed wheel can support 30 t (66,000 lb), tolerate a ground speed of 300 km/h and roll a distance of 500,000 km (310,000 mi) ; it has a 20,000 hours time between overhaul and a 60,000 hours or 20 year life time.
The only active operational model of the B-52 is the B-52H. It is currently stationed at three USAF bases, flown by four wings: [1] 2nd Bomb Wing (AFGSC) – Barksdale AFB, Louisiana. 11th Bomb Squadron (B-52H, Tail Code: LA, Gold Tail Stripe) 20th Bomb Squadron (B-52H, Tail Code: LA, Blue Tail Stripe)
2008 Guam B-52 crash; O. 1968 Kadena Air Base B-52 crash; P. 1966 Palomares incident; S. 1964 Savage Mountain B-52 crash; T. 1968 Thule Air Base B-52 crash; U.
At its retirement on 17 December 2004, Balls 8 was the oldest active B-52 in service, and the only active B-52 that was not an H model. It also had the lowest total airframe time of any operational B-52. It is on permanent public display near the north gate of Edwards Air Force Base in California. [2]
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