| 词条 | Fairey Long-range Monoplane | |||||||||||||||||
| 释义 |
The Fairey Long-range Monoplanes were a pair of British experimental aircraft of the late-1920s and early 1930s. They were single-engine, high-wing aircraft with fixed tail skid landing gear. Design and developmentThe first aircraft was designed to meet Air Ministry Specification 33/27; it was issued by the Directorate of Technical Development (DTD) in December 1927 after the failure of three attempts by the RAF to break the absolute distance world record flying Hawker Horsley bombers.[1] According to a Ministry spokesman in the House of Commons, this aircraft was to be constructed not just "for a specific record," but as a serious study into methods of increasing the range of aircraft. In order to soothe the anxieties of the Treasury, the aircraft started life as the Postal Aircraft.[2] The sharp, pointed nose and sleek lines of the prototype gave rise to the nickname "Eversharp," after the maker of pens and mechanical pencils.[3] Although other configurations were studied, after wind tunnel testing, a high wing was chosen, allowing a gravity feed from the fuel tanks. The wing spars were of wood and the wing used a pyramid system of internal bracing with fabric covering. The fuel capacity was 1,043 Imp gals (4,742 L) and the system used a gravity feed and mechanical fuel pump in sequence; a wind-driven, emergency back-up pump was also provided. There were other features dedicated to the long-range function; there were two parallel oil filter circuits, allowing one filter to be removed and cleaned while the other remained in operation. The aircraft was even equipped with a pneumatic bed for a reserve pilot. After extensive testing using a Fairey IIIF and a DH.9A, the Napier Lion XIA of {{cvt|570|hp}} was selected, late in the gestation of the machine. Operational historyThe first built, J9479, flew for the first time on 14 November 1928 from RAF Northolt.[4] The aircraft was handed over to the RAF on 7 December, and with testing continuing in preparation for the record attempt, including a 24-hour trial on 22–23 March 1929. It was decided to attempt a flight to Bangalore in India, a Great-circle distance of about 5,000 mile (8,000 km), comfortably in excess of the existing record of 4,466 miles (7,188 km) set by a Savoia-Marchetti S.64 in July 1928.[4] Squadron Leader A G Jones-Williams and Flight Lieutenant N H Jenkins set off on the record attempt from RAF Cranwell, Lincolnshire on 24 April 1929. The aircraft was slowed by headwinds, however, and the plane landed at Karachi after 50 hours 48 minutes in the air.[5] Although the flight was the first non-stop flight between Britain and India, the great circle distance of 4,130 miles (6,646 km) was short of the world records.[6] It was decided to make another record attempt later that year, although the record had been raised to 4,912 miles (8,007 km) by the Breguet 19 Point d'Interrogation. This time it was planned to fly from England to South Africa. This second attempt, with the same crew as the first, took off on 16 December 1929, but crashed south of Tunis, destroying the aircraft and killing the crew.[7] Despite this setback, the Air Ministry ordered a second Long-range Monoplane (K1991) in July 1930, this flying on 30 June 1931. While similar to the first aircraft, it had a number of differences, including the addition of an autopilot and wheel spats.[8][9] On 27-28 October 1931 Squadron Leader O R Gayford (officer in charge of the RAF Long Range Development Unit) with Flight Lieutenant D Betts as Navigator flew K1991 from RAF Cranwell to Abu Seir in Egypt, the {{convert|2557|mi|km}} was completed in 31½ hours.[10] From 6–8 February 1933, Gayford and his navigator Flight Lieutenant G.E. Nicholetts flew non-stop in the second aircraft, K1991, from Cranwell to Walvis Bay, South West Africa. This was a world long-distance record of 5,410 mi (8,540 km). On their return to RAE Farnborough, they were met by the Air Minister (Lord Londonderry), Under Secretary for Air (Sir Philip Sassoon) and Sir John Salmond, Marshal of the Royal Air Force.[11] The distance record stood until August 1933 when it was taken back by the French.[10] Gayford and the LRDU would later make long distance flights with the Vickers Wellesley. After K1991 flew back to the United Kingdom a number of suggestions to re-engine the aircraft were made and the Air Ministry issued Specification 27/33 for it to be re-engined with a Jumo engine, the aircraft was reconditioned but it was decided to design a new aircraft instead.[12] Not needed, K1991 was scrapped. Operators
Specifications (Fairey Long-range Monoplane II){{aircraft specifications|plane or copter?=plane |jet or prop?=prop |ref=Fairey Aircraft since 1915[2] |crew=2 |capacity= |length main= 48 ft 6 in |length alt= 14.8 m |span main= 82 ft |span alt= 25.0 m |height main= 12 ft |height alt= 3.6 m |area main= 850 ft² |area alt= 79 m² |airfoil= |empty weight main= |empty weight alt= |loaded weight main= |loaded weight alt= |useful load main= |useful load alt= |max takeoff weight main= 17,500 lb |max takeoff weight alt= 7,938 kg |more general=Mean chord: 11 ft (3.3 m) |engine (prop)=Napier Lion XIa |type of prop=twelve-cylinder, liquid-cooled |number of props=1 (fixed-pitch propeller) |power main= 570 hp |power alt= 425 kW |power original= |max speed main= |max speed alt= |cruise speed main= 110 mph[13] |cruise speed alt=96 knots, 177 km/h |never exceed speed main= |never exceed speed alt= |stall speed main= |stall speed alt= |range main= |range alt= |ceiling main= |ceiling alt= |climb rate main= |climb rate alt= |loading main= 20.7 lb/ft² |loading alt= 101.1kg/m² |thrust/weight= |power/mass main= 0.033 hp/lb |power/mass alt= 0.054 kW/kg |more performance=*Take-off distance: 4,500 ft (1,370 m) |armament= |avionics= }} See also{{aircontent|related= |similar aircraft=
|lists=
|see also= }} ReferencesNotes1. ^Taylor 1977, p. 18. 2. ^1 Taylor, Hugh A. Fairey Aircraft Since 1915. London: Putnam Aeronautical Books, 2004. {{ISBN|0-85177-825-9}}. 3. ^Winchester 2005, p. 37. 4. ^1 Taylor 1977, p. 19. 5. ^{{cite journal|magazine=Air Progress|date=November 1978|page=15}} 6. ^Taylor 1977, pp. 19–20. 7. ^Taylor 1977, pp. 20–21. 8. ^Taylor 1977, p. 21. 9. ^Cooksley 1993, p. 52. 10. ^1 Thetford 1976, p.246 11. ^S/L Gayford {{webarchive|url=https://web.archive.org/web/20140102/http://www.hadleigh.org.uk/content/gayford.htm |date=2 January 2014 }} 12. ^Meekcoms/Morgan 1994, p.6 13. ^Thetford 1957, pp. 208–209. Bibliography{{refbegin}}
External links{{Commons category}}
5 : British experimental aircraft 1920–1929|Fairey aircraft|High-wing aircraft|Single-engined tractor aircraft|Aircraft first flown in 1928 |
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