Boeing 747

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Boeing 747
A British Airways 747-400 in white, blue an reid livery during takoff wi its landin gear retractin.
British Airways Boeing 747-400 durin takoff
Role Wide-body, lang-range jet airliner
Naitional oreegin Unitit States
Manufacturer Boeing Commercial Airplanes
First flicht Februar 9, 1969[1]
Introduction Januar 22, 1970 wi Pan American World Airways[2]
Status In service
Primar uisers British Airways
United Airlines
Produced 1968–present
Nummer biggit 1,500 as o Juin 28, 2014[3]
Unit cost
747-100: US$24 million (1967)
747-200: US$39 million (1976)
747-300: US$83 million (1982)
747-400: US$228–260 million (2007)
747-8I: US$351.4 million[4]
747-8F: US$352 million
Variants Boeing 747SP
Boeing 747-400
Boeing 747-8
Boeing VC-25
Boeing E-4
Developit intae Boeing YAL-1
Boeing 747 Large Cargo Freighter

The Boeing 747 is an American wide-bouk commercial jet airliner an cargae aircraft, eften referred tae bi its oreeginal nickname, "Jumbo Jet". Its distinctive "hump" upper deck alang the forrit pairt o the aircraft haes made it ane o the maist recognisable aircraft,[5] an it wis the first wide-bouk airplane produced. Manufacturt bi Boeing's Commercial Airplane unit in the Unitit States, the 747 wis oreeginally enveesioned tae hae 150 percent greater capacity than the Boeing 707,[6] a common lairge commercial aircraft o the 1960s. First flewn commercially in 1970, the 747 held the passenger capacity record for 37 years.[7]

The fower-ingine 747 uises a dooble-deck confeeguration for pairt o its lenth an is available in passenger, frauchter an ither versions. Boeing designed the 747's hump-lik upper deck tae serve as a first–cless loonge or extra seatin, an tae allou the aircraft tae be easily convertit tae a cargae cairier bi remuivin seats an instawin a front cargae door. Boeing expectit supersonic airliners—the development o that wis annoonced in the early 1960s—tae render the 747 an ither subsonic airliners obsolete, while the demand for subsonic cargae aircraft wad remeen robust weel intae the futur.[8] Tho the 747 wis expectit tae acome obsolete efter 400 war sauld,[9] it exceedit creetics' expectations wi production surpassin 1,000 in 1993.[10] Bi Januar 2018, 1,543 aircraft haed been biggit, wi 11 o the 747-8 variants remeenin on order.[11] As o Januar 2017, the 747 haes been involved in 60 huil losses, resultin in 3,722 fatalities.[12]

The 747-400, the maist common variant in service, has a heich-subsonic cruise speed o Mach 0.85–0.855 (up tae 570 mph or 920 km/h) wi an intercontinental range o 7,260 nautical miles (8,350 statute miles or 13,450 km).[13] The 747-400 can accommodate 416 passengers in a teepical three-class layoot, 524 passengers in a teepical twa-cless layoot, or 660 passengers in a heich–density ane-cless confeeguration.[14] The newest version o the aircraft, the 747-8, is in production an received certification in 2011. Deliveries o the 747-8F frauchter version begoud in October 2011; deliveries o the 747-8I passenger version begoud in Mey 2012.

References[eedit | eedit soorce]

  1. Rumerman, Judy. "The Boeing 747." U.S. Centennial of Flight Commission, 2003. Retrieved: April 30, 2006.
  2. "Jumbo and the Gremlins." TIME, February 2, 1970. Retrieved: December 20, 2007.
  3. "Boeing Delivers 1,500th 747". Boeing, June 28, 2014.
  4. "Boeing Commercial Airplanes prices." The Boeing Company. Retrieved: August 8, 2012.
  5. Negroni, Christine (July 2014). "747: The World's Airliner". Air & Space Magazine. Retrieved January 2, 2015. 
  6. Branson, Richard. "Pilot of the Jet Age." Time, December 7, 1998. Retrieved: December 13, 2007.
  7. "A380 superjumbo lands in Sydney." BBC, October 25, 2007. Retrieved: August 3, 2010. Quote: "The superjumbo's advent ends a reign of nearly four decades by the Boeing 747 as the world's biggest airliner."
  8. Orlebar 2002, p. 50.
  9. Haenggi 2003, pp. 14–15.
  10. Sutter 2006, p. 259.
  11. "747 Model Orders and Deliveries data." The Boeing Company, November 2017. Retrieved: January 1, 2018.
  12. "Boeing 747 Statistics". Flight Safety Foundation. 
  13. "Technical Characteristics – Boeing 747-400", The Boeing Company. Retrieved: April 29, 2006.
  14. "747." The Boeing Company. Retrieved: Januar 9, 2012.