| 词条 | Rolls-Royce Trent 800 | |||||||||||||||
| 释义 |
The Rolls-Royce Trent 800 is a high-bypass turbofan aircraft engine, developed from the RB211 and is one of the family of Trent engines. It was designed to be used on the Boeing 777. Design and developmentIn the late 1980s, Boeing was investigating an enlarged development of its 767 model dubbed the 767X, for which Rolls-Royce proposed the Trent 760. By 1990 Boeing abandoned its planned 767X and instead decided to launch a new, larger aircraft family designated 777 with a thrust requirement of {{convert|80000|lbf|kN|abbr=on}} or more. The Trent 700's {{convert|2.47|m|in|abbr=on}} diameter fan would not be big enough to meet this requirement, so Rolls proposed a new version with a {{convert|2.80|m|in|abbr=on}} fan diameter, designated as the Trent 800. Rolls brought in Kawasaki Heavy Industries and Ishikawajima-Harima Heavy Industries as risk and revenue sharing partners who between them took an 11 per cent stake in the Trent 700 and 800 programmes.[1] Testing of the Trent 800 began in September 1993, and certification was achieved in January 1995.[2] The first Boeing 777 with Trent 800 engines flew in May 1995, and entered service with Thai Airways International on 31 March 1996.[3] 180 minutes ETOPS approval was granted by the FAA on 10 October 1996.[4] Initially Rolls-Royce had difficulty selling their engine: British Airways, traditionally a Rolls-Royce customer, submitted a large order for General Electric's competing GE90 engine. The breakthrough came when the company won orders from Singapore Airlines, a staunch Pratt & Whitney customer, for its 34 Boeing 777s; this was soon followed by large North American orders from American Airlines and Delta Air Lines for their 777 fleets. British Airways announced in September 1998 that it was returning to Rolls-Royce for its second batch of 777s, and did so again in April 2007. The Trent 800 has a 41% share of the engine market on the 777 variants for which it is available. Rolls-Royce Trent 800s are now commonly used on the Boeing 777 series. Many major airlines such as Air New Zealand, British Airways, American Airlines, and Kenya Airways now operate Boeing 777s with Trent 800s on a regular schedule.[5] As of 2014 Rolls-Royce is offering an upgraded version of the engine, known as the Trent 800EP. It incorporates technology from Trent 1000 and Trent XWB engines including elliptical leading edges on intermediate- and high-pressure compressor blades. Rolls-Royce claims that it provides a 0.7% fuel-burn benefit.[6] Accidents and incidentsOn 17 January 2008, British Airways Flight 38, flying from Beijing to London, crash-landed at Heathrow after both Trent 800 engines lost power during the aircraft's final approach, with no fatalities. The subsequent investigation found that the cause was ice released from the fuel system which accumulated on the fuel-oil heat exchanger leading to a restriction of fuel flow to the engines.[7] Rolls-Royce has developed a modification to prevent the problem recurring.[8] ApplicationsThe Trent 800 family powers the Boeing 777. It was available on the 777-200 and 777-300 variants and is currently available on the long-range 777-200ER, with thrust ratings spanning {{convert|75000|to|93400|lbf|kN|abbr=on}}. Rolls-Royce claims that the engine is the lightest in its class, citing a 3.6-tonne weight saving over General Electric and Pratt & Whitney-powered versions. However, the -200 and -300 variants were discontinued by 2006, leaving the -200ER as the only one available with the Trent 800. The others currently in production (-200LR, -300ER, Freighter, -8, and -9) are powered exclusively by General Electric's GE90 and GE9X engines. Specifications (Trent 800){{jetspecs| |type = Three-shaft high bypass ratio (6.2–5.7) turbofan engine |length = {{convert|4.37|m|in|abbr=on}} |diameter = {{convert|2.79|m|in|abbr=on}} |weight = 7,484 kg (16,500 pounds) |compressor = Eight-stage IP compressor, six-stage HP compressor |combustion = Single annular combustor with 24 fuel injectors |turbine = Single-stage HP turbine, single-stage IP turbine, five-stage LP turbine |fueltype = |oilsystem = |compression = |aircon = |fuelcon = |specfuelcon = |power/weight = |thrust = 415 kN (93,400 lbf) |thrust/weight = approx. 5.6:1 }} See also{{Aircontent|related=
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|see also= }} ReferencesNotes1. ^{{cite web | title = Powerful partner in Japan | url = http://www.rolls-royce.com/japan/en/partners/default.htm | accessdate = 2007-02-02 | deadurl = yes | archiveurl = https://web.archive.org/web/20070520074900/http://www.rolls-royce.com/japan/en/partners/default.htm | archivedate = 20 May 2007 | df = dmy-all }} 2. ^{{cite news | title = Aero-Engines – Rolls-Royce Trent | publisher = Jane's | date = 13 February 2001 | url = http://www.janes.com/aerospace/civil/news/jae/jae010213_2_n.shtml | accessdate = 2007-07-26 |archiveurl = https://web.archive.org/web/20071110025612/http://www.janes.com/aerospace/civil/news/jae/jae010213_2_n.shtml |archivedate = 2007-11-10}} 3. ^Boeing 777 4. ^{{cite web | title = Chronology Of The Boeing 777 Program | url = http://www.boeing.com/commercial/777family/pf/pf_milestones.html | accessdate = 2007-07-26 |archiveurl = https://web.archive.org/web/20070609173529/http://www.boeing.com/commercial/777family/pf/pf_milestones.html |archivedate = 2007-06-09}} 5. ^{{cite web | title = Rolls-Royce Trent 800 | url = http://www.rolls-royce.com/civil/products/largeaircraft/trent_800/ | accessdate = 2009-02-15 }} 6. ^{{cite news|url=http://www.ainonline.com/aviation-news/farnborough-air-show/2014-07-15/rolls-royce-upgrades-service-trent-engines|title=Rolls-Royce Upgrades In-service Trent Engines|accessdate=3 August 2014|date=15 July 2014|work=AINonline|author=Thierry Dubois}} 7. ^{{cite news | title = Rolls-Royce to modify Trent as tests replicate BA 777 icing | publisher = Flight International | date = 12 March 2009 | url = http://www.flightglobal.com/articles/2009/03/12/323769/rolls-royce-to-modify-trent-as-tests-replicate-ba-777.html | accessdate = 2009-03-15 }} 8. ^{{cite news | title = Rolls-Royce: Trent 800 fix only part of broader icing issue | publisher = Flight International | date = 12 March 2009 | url = http://www.flightglobal.com/articles/2009/03/12/323794/rolls-royce-trent-800-fix-only-part-of-broader-icing.html | accessdate = 2009-03-15 }} External links{{Commons category}}
3 : High-bypass turbofan engines|Rolls-Royce aircraft gas turbine engines|Turbofan engines 1990–1999 |
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