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• De_Havilland_Comet abstract "The de Havilland DH 106 Comet was the first production commercial jetliner. Developed and manufactured by de Havilland at its Hatfield, Hertfordshire, United Kingdom headquarters, the Comet 1 prototype first flew on 27 July 1949. It featured an aerodynamically clean design with four de Havilland Ghost turbojet engines buried in the wings, a pressurised fuselage, and large square windows. For the era, it offered a relatively quiet, comfortable passenger cabin and showed signs of being a commercial success at its 1952 debut.A year after entering commercial service the Comets began suffering problems, with three of them breaking up during mid-flight in well-publicised accidents. This was later found to be due to catastrophic metal fatigue in the airframes, not well understood at the time. The Comet was withdrawn from service and extensively tested to discover the cause; the first incident had been incorrectly blamed on adverse weather. Design flaws, including dangerous stresses at the corners of the square windows and installation methodology, were ultimately identified. As a result, the Comet was extensively redesigned with oval windows, structural reinforcement and other changes. Rival manufacturers meanwhile heeded the lessons learned from the Comet while developing their own aircraft.Although sales never fully recovered, the improved Comet 2 and the prototype Comet 3 culminated in the redesigned Comet 4 series which debuted in 1958 and had a productive career of over 30 years. The Comet was adapted for a variety of military roles such as VIP, medical and passenger transport, as well as surveillance. The most extensive modification resulted in a specialised maritime patrol aircraft variant, the Hawker Siddeley Nimrod. Nimrod remained in service with the Royal Air Force (RAF) until June 2011, over 60 years after the Comet's first flight.".
• De_Havilland_Comet manufacturer De_Havilland.
• De_Havilland_Comet numberBuilt "114".
• De_Havilland_Comet retired "1997-03-14".
• De_Havilland_Comet thumbnail Design_Studies_for_the_DH_106_Comet.jpg?width=300.
• De_Havilland_Comet type Narrow-body_aircraft.
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• De_Havilland_Comet wikiPageExternalLink 3248.pdf.
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• De_Havilland_Comet wikiPageExternalLink Journal%2026%20-%20Seminar%20the%20RAF%20and%20Nuclear%20Weapons%201960-98.pdf.
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• De_Havilland_Comet wikiPageID "182728".
• De_Havilland_Comet wikiPageRevisionID "606223600".
• De_Havilland_Comet align "left".
• De_Havilland_Comet align "right".
• De_Havilland_Comet caption "Comet 1 3-view in silhouette".
• De_Havilland_Comet caption "Comet 4B 3-view schematic".
• De_Havilland_Comet developedInto Hawker_Siddeley_Nimrod.
• De_Havilland_Comet firstFlight "1949-07-27".
• De_Havilland_Comet hasPhotoCollection De_Havilland_Comet.
• De_Havilland_Comet image "Comet 1 3-view.jpg".
• De_Havilland_Comet image "De Havilland Comet.svg".
• De_Havilland_Comet introduced "--05-02".
• De_Havilland_Comet manufacturer De_Havilland.
• De_Havilland_Comet moreUsers British_European_Airways.
• De_Havilland_Comet moreUsers Dan-Air.
• De_Havilland_Comet moreUsers Royal_Air_Force.
• De_Havilland_Comet numberBuilt "114".
• De_Havilland_Comet primaryUser British_Overseas_Airways_Corporation.
• De_Havilland_Comet quote ""During the next few years, the UK has an opportunity, which may not recur, of developing aircraft manufacture as one of our main export industries. On whether we grasp this opportunity and so establish firmly an industry of the utmost strategic and economic importance, our future as a great nation may depend."".
• De_Havilland_Comet quote ""I don't think it is too much to say that the world changed from the moment the Comet's wheels left the ground."".
• De_Havilland_Comet quote ""The cost of solving the Comet mystery must be reckoned neither in money nor in manpower."".
• De_Havilland_Comet retired "1997-03-14".
• De_Havilland_Comet source "(Duncan Sandys, Minister of Supply, 1952.)".
• De_Havilland_Comet source "(Prime Minister Winston Churchill, 1954.)".
• De_Havilland_Comet source "(Tony Fairbrother, manager, upgraded Comet development.)".
• De_Havilland_Comet status "Retired".
• De_Havilland_Comet type Airliner.
• De_Havilland_Comet type Jet_airliner.
• De_Havilland_Comet type Narrow-body_aircraft.
• De_Havilland_Comet unitCost "Comet 1: £275,000".
• De_Havilland_Comet width "175".
• De_Havilland_Comet width "19.0".
• De_Havilland_Comet width "20.0".
• De_Havilland_Comet width "21.0".
• De_Havilland_Comet width "250".
• De_Havilland_Comet subject Category:British_airliners_1940–1949.
• De_Havilland_Comet subject Category:De_Havilland_aircraft.
• De_Havilland_Comet subject Category:Quadjets.
• De_Havilland_Comet type Aircraft.
• De_Havilland_Comet type MeanOfTransportation.
• De_Havilland_Comet type Product.
• De_Havilland_Comet type Model_airplane.
• De_Havilland_Comet type TransportationDevice_Vehicle.
• De_Havilland_Comet type DesignedArtifact.
• De_Havilland_Comet comment "The de Havilland DH 106 Comet was the first production commercial jetliner. Developed and manufactured by de Havilland at its Hatfield, Hertfordshire, United Kingdom headquarters, the Comet 1 prototype first flew on 27 July 1949. It featured an aerodynamically clean design with four de Havilland Ghost turbojet engines buried in the wings, a pressurised fuselage, and large square windows.".
• De_Havilland_Comet label "De Havilland Comet".
• De_Havilland_Comet label "De Havilland Comet".
• De_Havilland_Comet label "De Havilland Comet".
• De_Havilland_Comet label "De Havilland Comet".
• De_Havilland_Comet label "De Havilland Comet".
• De_Havilland_Comet label "De Havilland Comet".
• De_Havilland_Comet label "De Havilland DH.106 Comet".
• De_Havilland_Comet label "De Havilland DH.106 Comet".
• De_Havilland_Comet label "De Havilland DH.106 Comet".
• De_Havilland_Comet label "دي هافيلاند كومت".
• De_Havilland_Comet label "デ・ハビランド DH.106 コメット".
• De_Havilland_Comet label "哈維蘭彗星型".
• De_Havilland_Comet sameAs De_Havilland_Comet.
• De_Havilland_Comet sameAs De_Havilland_Comet.
• De_Havilland_Comet sameAs De_Havilland_DH.106_Comet.
• De_Havilland_Comet sameAs De_Havilland_Comet.
• De_Havilland_Comet sameAs De_Havilland_Comet.
• De_Havilland_Comet sameAs De_Havilland_Comet.
• De_Havilland_Comet sameAs De_Havilland_DH.106_Comet.
• De_Havilland_Comet sameAs デ・ハビランド_DH.106_コメット.
• De_Havilland_Comet sameAs 드_하빌랜드_DH.106_코멧.
• De_Havilland_Comet sameAs De_Havilland_DH.106_Comet.
• De_Havilland_Comet sameAs De_Havilland_Comet.
• De_Havilland_Comet sameAs De_Havilland_Comet.
• De_Havilland_Comet sameAs m.018z9z.
• De_Havilland_Comet sameAs Q26159.
• De_Havilland_Comet sameAs Q26159.

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