| 词条 | De Havilland DH.50 | |||||||||||||||||
| 释义 |
The de Havilland DH.50 was a 1920s British large single-engined biplane transport built by de Havilland at Stag Lane Aerodrome, Edgware, and licence-built in Australia, Belgium and Czechoslovakia. HistoryIn the early 1920s, Geoffrey de Havilland realised that war surplus aircraft would need replacing, so his company designed a four-passenger-cabin biplane, the DH.50, using experience gained with the earlier de Havilland DH.9. The first DH.50 (registered G-EBFN) flew in August 1923 and was used within a few days by Alan Cobham to win a prize for reliability during trial flights between Copenhagen and Gothenburg. Only 17 aircraft were built by de Havilland; the rest were produced under licence. The different aircraft had a wide variety of engine fits. In 1924, Cobham won the King's Cup Race air race in G-EBFN averaging 106 mph (171 km/h). Cobham made several long-range flights with the prototype until he replaced it with the second aircraft. The second aircraft (registered G-EBFO) was re-engined with the Armstrong Siddeley Jaguar engine and was designated the DH.50J. Cobham flew the aircraft on a 16,000 mi (25,750 km) flight from Croydon Airport to Cape Town between November 1925 and February 1926. The aircraft was later fitted with twin floats (produced by Short Brothers at Rochester) for a survey flight of Australia in 1926. On the outward flight from England to Australia, Cobham's engineer (A.B. Elliot) was shot and killed when they were overflying the desert between Baghdad and Basra. He was replaced by Sergeant Ward, a Royal Air Force engineer who was given permission to join the flight by his commanding officer. Also in 1926, a DH.50A floatplane was used in the first international flight made by the Royal Australian Air Force. The Chief of the Air Staff, Group Captain Richard Williams, and two crew members undertook a three-month, 10,000 mi (16,093 km) round trip from Point Cook, Victoria to the Pacific Islands.{{sfn|Stephens|2006|pp=39–41}} Licence productionThe aircraft was popular in Australia and de Havilland licensed its production there, leading to 16 aircraft being built. Qantas built four DH.50As and three DH.50Js, Western Australian Airlines built three DH.50As, and Larkin Aircraft Supply Company built one DH.50A.[1] SABCA built three DH.50As in Brussels, Belgium and Aero built seven in Prague, then in Czechoslovakia.{{sfn|Cook|1997|p=21}} The British-built QANTAS DH.50 (G-AUER/VH-UER) was modified in Longreach, Queensland, to suit the Australian Inland Mission as an aerial ambulance. The aircraft was called Victory by the Rev. J Flynn and was the first aircraft used by the Royal Flying Doctor Service of Australia. Variants
Operators
Specifications{{aircraft specifications|ref=Jackson, 1987, p. 190[3] |plane or copter?=plane |jet or prop?=prop |crew=one |capacity=four |length main= 29 ft 9 in |length alt= 9.07 m |span main= 42 ft 9 in |span alt= 13.03 m |height main= 11 ft 0 in |height alt= 3.35 m |area main= 434 ft² |area alt= 40.32 m² |empty weight main= 2,253 lb |empty weight alt= 1,022 kg |loaded weight main= |loaded weight alt= |max takeoff weight main= 3,900 lb |max takeoff weight alt= 1,769 kg |engine (prop)=Siddeley Puma |type of prop= inline piston engine, or Armstrong Siddeley Jaguar radial. |number of props=1 |power main=230 hp |power alt= 172 kw |max speed main= 112 mph |max speed alt= 97 kn, 180 km/h |range main= 380 mi |range alt= 330 nmi, 612 km |ceiling main= 14,600 ft |ceiling alt= 4,450 m |climb rate main= 605 ft/min |climb rate alt=3.07 m/s |loading main=8.99 lb/ft² |loading alt=25.3 kg/m² |power/mass main=0.059 hp/lb |power/mass alt=0.097 kW/kg |armament= }} See also{{aircontent|related= |similar aircraft= |sequence= |lists=
|see also= }} ReferencesNotes1. ^1 {{harvnb|Wilson|1994|p=216}} 2. ^{{harvnb|Gunn|1985|p=}}{{page needed |date=August 2018}} 3. ^{{harvnb|Jackson|1987|p=190}} Bibliography{{refbegin}}
External links{{Commons category}}
6 : Aircraft first flown in 1923|Biplanes|British civil utility aircraft 1920–1929|De Havilland aircraft|Racing aircraft|Single-engined tractor aircraft |
|||||||||||||||||
| 随便看 |
|
开放百科全书收录14589846条英语、德语、日语等多语种百科知识，基本涵盖了大多数领域的百科知识，是一部内容自由、开放的电子版国际百科全书。