| 词条 | Martin-Baker MB 5 | ||||||||||||||||||
| 释义 |
The British Martin-Baker MB 5 was the ultimate development of a series of prototype fighter aircraft built during the Second World War. Neither the MB 5 nor its predecessors ever entered production, despite what test pilots described as excellent performance.[1] Design and developmentMartin-Baker Aircraft actually began the MB 5 as the second Martin-Baker MB 3 prototype, designed to Air Ministry Specification F.18/39 for an agile, sturdy Royal Air Force fighter, able to fly faster than 400 mph. After the first MB 3 crashed in 1942, killing Val Baker, the second prototype was delayed. A modified MB 3 with a Rolls-Royce Griffon was planned as the MB 4, but a full redesign was chosen instead.[1]The re-designed aircraft, designated MB 5, used wings similar to the MB 3, but had an entirely new steel-tube fuselage. Power came from a Rolls-Royce Griffon 83 liquid-cooled V-12 engine, producing 2,340 hp (1,745 kW) and driving two three-bladed contra-rotating propellers.[2] Armament was four 20 mm Hispano cannon, mounted in the wings outboard of the widely spaced retractable undercarriage. A key feature of the design was ease of manufacture and maintenance: much of the structure was box-like, favouring straight lines and simple conformation.[3] It was built under the same contract that covered the building of the MB.3.[4] Flight testingThe first flight of the MB 5 prototype, serial R2496, took place on 23 May 1944.[5] Performance was considered outstanding by test pilots, and the cockpit layout was praised by the Aeroplane and Armament Experimental Establishment (A&AEE). The accessibility of the fuselage for maintenance was excellent, thanks to a system of detachable panels. "In my opinion this is an outstanding aircraft, particularly when regarded in the light of the fact that it made its maiden flight as early as 23rd May 1944" Acknowledged as one of the best aerobatic pilots in the UK, S/L Janusz Żurakowski from the A&AEE at RAF Boscombe Down gave a spectacular display at the Farnborough Air Show in June 1946, with the Martin-Baker MB 5, a design he considered as a superlative piston-engined fighter, better in many ways than the Spitfire. Serial production, had it been authorised, would have begun in time for squadron service over Germany. Instead, the RAF directed their attention towards jet-powered fighters and the MB 5 remained unordered. Perhaps one of the reasons that the MB 5 did not go into production, was because the Rolls-Royce Griffon engine failed when the MB 5 was being demonstrated to Prime Minister, Winston Churchill, the Chief of the Air Staff and a host of other VIPs at an important display of British and captured German aircraft at Farnborough.[7] Another reason, stated by Michael Bowyer, is that Martin-Baker may have lacked both facilities and sufficient government support.[8] The company's slow progress with the machine could have been due to a lack of facilities.[4] The original MB 5 was reputedly destroyed on a gunnery range {{Citation needed|date=April 2009}}. Martin-Baker went on to become one of the world's leading builders of ejection seats. Replica constructionA partial replica is being built in Reno, Nevada, USA by John Marlin using wings from a P-51 Mustang.[9][10] The website stated in 2006 that it was nearing completion, and {{As of|2010|lc=on}}, an undated entry shows a photograph of the aircraft taxiing and says that it is nearing completion. Specifications (MB 5, as designed){{Aircraft specs|ref=Jane's all the World's Aircraft 1947[11], Jane's Fighting Aircraft of World War II[5] and British Aircraft of World War II[12] |prime units?=imp
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1. ^Baugher, Joe. "Martin-Baker MB 5." Aircraft of the World, 19 November 1995. Retrieved 9 April 2006. 2. ^MB 5 {{webarchive|url=https://web.archive.org/web/20060430033852/http://www.martin-baker.com/history_mb5.html |date=30 April 2006 }} Martin-Baker History. Retrieved 9 April 2006. 3. ^'Sir James Martin' Sarah Sharman {{ISBN|1 85260 551 0}} 4. ^1 Buttler 2004, p. 31. 5. ^1 Jane 1946, pp. 129–130. 6. ^1 Brown 1983, pp. 150–153. 7. ^Donald 1997, pp. 150–157. 8. ^Bowyer 1984, pp. 124–125. 9. ^Marlin, Paul D. "John's First Flying Adventures." John Marlin's MB5 replica website (johnmarlinsmb5replica.mysite.com). Retrieved 5 May 2010. 10. ^http://www.vintagewings.ca/VintageNews/Stories/tabid/116/articleType/ArticleView/articleId/141/Saving-the-Wild-Mustangs--the-Story-Behind-the-Vintage-Wings-Mustang.aspx. Retrieved 14 August 2017 11. ^{{cite book |title=Jane's all the World's Aircraft 1947 |edition= |editor1-last=Bridgman |editor1-first=Leonard |year=1947 |publisher=Sampson Low, Marston & Co |location=London |pages=60c-61c}} 12. ^{{cite web|title=MARTIN-BAKER MB.5|url=http://jaapteeuwen.com/ww2aircraft/html%20pages/martin-baker%20mb5.htm|accessdate=26 November 2017|deadurl=bot: unknown|archiveurl=https://web.archive.org/web/20080613154227/http://jaapteeuwen.com/ww2aircraft/html%20pages/martin-baker%20mb5.htm|archivedate=13 June 2008|df=dmy-all}} 13. ^for 5 minutes at {{convert|550|ft|abbr=on}} in M gear, at 2750 rpm with {{convert|25|psi|abbr=on}} boost 14. ^Hydromatic {{convert|3.58|m|ftin|abbr=on|disp=flip}} SKP 74489/15A front with {{convert|3.54|m|abbr=on|disp=flip}} 3-bladed SKP 74490/18A rear
External links{{commons category|Martin-Baker M.B.5}}
7 : Martin-Baker aircraft|British fighter aircraft 1940–1949|Cancelled military aircraft projects of the United Kingdom|Aircraft with contra-rotating propellers|Individual aircraft of World War II|Single-engined tractor aircraft|Aircraft first flown in 1944 |
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