词条 | Fairchild Swearingen Metroliner | |||||||||||||||||
释义 |
The Fairchild Swearingen Metroliner (previously the Swearingen Metro and later Fairchild Aerospace Metro) is a 19-seat, pressurized, twin-turboprop airliner first produced by Swearingen Aircraft and later by Fairchild Aircraft at a plant in San Antonio, Texas, United States. Design and developmentThe Metroliner was an evolution of the Swearingen Merlin turboprop-powered business aircraft. Ed Swearingen, a Texas fixed-base operator (FBO), started the developments that led to the Metro through gradual modifications to the Beechcraft Twin Bonanza and Queen Air business aircraft, which he dubbed Excalibur. A new fuselage (but with a similar nose) and vertical fin were then developed, married to salvaged and rebuilt (wet) Queen Air wings and horizontal tails, and Twin Bonanza landing gear; this became the SA26 Merlin, more-or-less a pressurized Excalibur. Through successive models (the SA26-T Merlin IIA and SA26-AT Merlin IIB) the engines were changed to Pratt & Whitney Canada PT6, then Garrett TPE331 turboprops. These were marketed as business aircraft seating eight to ten passengers. An all-new aircraft was built and named the SA226-T Merlin III with a new nose, wings, landing gear, cruciform horizontal tail[1] and inverted inlet Garrett engines. Ultimately a stretch of the Merlin III was designed, sized to seat 22 passengers and called the SA226-TC Metro. Because FAA regulations limited an airliner to no more than 19 seats if no flight attendant was to be carried, the aircraft was optimized for that number of passengers. The standard engines offered were two TPE331-3UW turboprops driving three-bladed propellers. A corporate version called the SA226-AT Merlin IVA was also marketed and initially sales of this version were roughly double that of the Metro.[2] Prototype construction of the Metro began in 1968 and the first flight was on August 26, 1969. Swearingen Aircraft encountered financial difficulties at this stage, and late in 1971 Fairchild (which was marketing the Metro[3] and building its wings and engine nacelles), bought 90% of Swearingen and the company was renamed Swearingen Aviation Corporation. It was at this point that the previously cash-strapped company was able to put the Metro into production.[3][5][6] In 1974, the original Metro models were replaced by the SA226-TC Metro II after about 20 Metros and about 30 Merlin IVAs had been built.[4] Among the changes made were larger, squared-oval windows and optional provision for a small Rocket-Assisted Take Off (RATO) rocket in the tail cone, this being offered to improve takeoff performance out of "hot & high" airfields in the event of an engine failure. The Metro and Metro II were limited to a maximum weight of 12,500 pounds (5,670 kg) in the US and countries using imperial units, and 5,700 kg in countries using SI units. When this restriction was lifted the Metro II was re-certified as the Metro IIA in 1980 with a maximum weight of 13,100 pounds (5,941 kg) and the Metro II's TPE331-3 engines replaced by -10 engines of increased power. The SA227-AC Metro III followed, also initially certified in 1980 for up to 14,000 pounds (6,350 kg), this increasing to 14,500 pounds (6,577 kg) as engines and structures were upgraded. An option to go as high as 16,000 pounds (7,257 kg) was offered. Externally, improvements incorporated into the Metro III were a 10 ft (3.05 m) increase in wing span, four-bladed props, redesigned "quick-access" engine cowlings and numerous drag-reducing airframe modifications, including landing gear doors that closed after the gear was extended. Once again a corporate version was offered as the Merlin IVC (the model name was chosen to align with the contemporaneous short-fuselage Merlin IIIC). A version with strengthened floors and the high gross weight option was offered as a cargo aircraft known as the Expediter. Both the Expediter and the Merlin IVC were designated the SA227-AT. Finally, due to reliability problems with Garrett engines in the second half of the 1980s, the Metro IIIA was offered with two Pratt & Whitney Canada PT6A-45R turboprops in place of the Garrett units; however none were actually delivered.[8] A special model was the SA227-BC Metro III built for Mexican airline AeroLitoral, which took delivery of 15 of the 18 of this model that were produced. Improvements beyond the Metro III provided better systems, more power and a further increase in takeoff weight. This design effort resulted in the SA227 CC (for Commuter Category) and SA227-DC models, initially called the Metro IV[5] then renamed Metro 23, so named as they were designed for certification under FAR Part 23 (Amendment 34) standards. A Metro 23 EF with an external pod under the lower fuselage for greater baggage capacity was also offered as well as an Expediter 23 and Merlin 23. The SA227-CC was an interim model with TPE331-11U engines and only a handful were built.[6][6] Further developmentIn the 1960s Swearingen Aircraft developed a prototype SA-28T eight-seat jet aircraft with a flapless delta wing.[7][8] It shared the tail and cockpit with the Merlin/Metro. The two engines were to be Garrett TFE731 turbofans then in development;[9] they were originally to be mounted on the aft fuselage, however during the course of design work their location was moved to under the high-mounted wing.[10] Early flights were to be undertaken with General Electric CJ610 engines fitted. Development continued after Fairchild acquired the company,[11] but the project was shut down nine weeks from first flight. It was later cut up as scrap and the fuselage used as a Metro display at trade shows.{{Citation needed|date=March 2008}} At the 1987 Paris Air Show, Fairchild released details of proposed developments of the Metro designated the Metro V and Metro VI. These versions would have featured a longer fuselage with a taller "stand-up" cabin providing 69 in (180 cm) of interior height for passengers; a redesigned, longer wing; engines moved further out on the wing from the fuselage; a "T-tail" and various system improvements. A Merlin V corporate version of the Metro V was also planned. The Metro V was to be fitted with the same engines as the Metro 23 and the Metro VI was to be fitted with more powerful TPE331-14 engines.[5][12] The Metro VI was shelved within months of being announced due to a lack of customer interest,[13] but Fairchild did not proceed with the Metro V either. One version that did see the light of day was the Metro 25, which featured an increased passenger capacity of 25 at the expense of the baggage space found in earlier models; the deletion of the left rear cargo door, the addition of a passenger door on the right-hand rear fuselage, and a belly pod for baggage. A Metro III was converted as a Metro 25 demonstrator, it flew in this configuration in October 1989.[14] Also mooted but not built was the Metro 25J, which would have been another jet-powered aircraft with TFE731s in over-wing pods.[12] The type certificates for Metro and Merlin aircraft are currently held by M7 Aerospace. Operational historyTwo of the original Metro model were delivered in 1972 to Societe Miniere de Bakwanga (MIBA) in Kinshasa, Zaire, the first customer to put the Metro into service. The first airline to put them into service was Commuter Airlines in January 1973,[5] followed shortly after by Air Wisconsin. At least one Metro IIA flies in Canada with Perimeter Aviation.[15] Two SA227-CCs are today registered with Canadian operator Bearskin Lake Air Service Ltd.,[16] while another two are operating in New Zealand.[17] A fifth also flew with Bearskin Airlines but was destroyed in a mid-air collision in 1995.[18] In service with Perimeter Aviation in Canada, this long-term operator of the Metro II and III made a number of modifications to suit its use in northern and remote Canadian sites where rudimentary gravel "strips" were common. Some of the many innovative changes to the design of the Metro allowed the aircraft to fly more efficiently as well as cutting down on the "noise factor" that was attributed to the early models. The airline installed Garrett engines with quieter and more efficient four-bladed Hartzell propellers. More recently in 2016, 5 blade composite propellers are being installed, further enhancing performance and reducing noise levels. Their Metros are also all equipped with modern avionics suites including recent installation of Garmin 950 glass cockpits and GPS satellite tracking. Many of the improvements resulting in the Metro 23 came about during work to produce the military C-26B model for the United States Air Force. A Metro III aircraft was modified for the Colombian Air Force for counternarcotics reconnaissance purposes.[19] The Colombian National Police also operates several Metro 23 aircraft for counternarcotics reconnaissance purposes.[20][21] In addition, the Peruvian Air Force operates a Metro 23 and the Trinidad and Tobago Coast Guard operates a Metro III, both similarly configured.[22][23] A "Regional Security System" Metro III with a large belly radome has been seen in the Caribbean.[24][25] In civilian service the type has proved to be popular, with sales in the 19-seat airliner market rivalled only by the Beechcraft 1900.[26] It is especially popular in Australia. Since the first example (a Merlin IVA) arrived in 1975, almost 20% of the fleet has operated in that country. As of December 2008, 61 Metros and Expediters are registered in Australia, more than all of its market rivals combined.[27] Metro production ended in 1998; however by this time Regional Jets were in vogue and turboprop types were out of favour with airlines, and several airframes remained unsold at the factory. The final aircraft, Metro 23 c/n DC-904B, was not delivered (to air charter company National Jet Aviation Services of Zelienople, Pennsylvania) until 2001.[28] A total of 703 Metro, Expediter, Merlin IV series and C-26 series aircraft were built.[29] In addition, 158 other SA226 and SA227 series aircraft were built as short-fuselage Merlin IIIs, IIIAs and IIIBs.[30] VariantsSA226 series
SA227 series
Military
Operators{{main article|List of Fairchild Swearingen Metroliner operators}}In July 2016, 225 Metroliners were in airline service; airline operators with six or more aircraft were:[31]
Accidents and incidents
Specifications (Metro III){{aircraft specifications|plane or copter?= plane |jet or prop?= prop |ref=The Encyclopedia of World Aircraft[53] |crew= Two (pilot & first officer), 1 pilot in cargo only configuration |capacity= 19 passengers or 143.5 ft³ (4.06 m³) cargo |length main= 59 ft 4 in |length alt= 18.09 m |span main= 57 ft 0 in |span alt= 17.37 m |height main= 16 ft 8 in |height alt= 5.08 m |area main= 310 ft² |area alt= 28.71 m² |airfoil= |empty weight main= 8,737 lb |empty weight alt= 3,963 kg |loaded weight main= |loaded weight alt= |useful load main= |useful load alt= |max takeoff weight main= 14,500 lb or 16,000 lb, |max takeoff weight alt= 6,577 kg or 7,257 kg |max takeoff weight more= depending on model[54] |more general= |engine (prop)= Garrett AiResearch TPE-331[55] |type of prop= turboprops with continuous alcohol-water injection |number of props=2 |power main= 1,000 shp, 1,100 shp with AWI |power alt= 745.5 kW, 820 kW |power original= |propeller or rotor=propeller |propellers=four-bladed McCauley 4HFR34C652 or Dowty Rotol R.321/4-82-F/8 [56] |max speed main= 311 knots |max speed alt= 355 mph, 576 km/h |cruise speed main= 278 knots |cruise speed alt= 318 mph, 515 km/h |never exceed speed main= |never exceed speed alt= |stall speed main= |stall speed alt= |range main= 1,150 miles [57] |range alt= 1,065 nmi or 2,131 km |ceiling main= 25,000 ft |ceiling alt= 7,620 m |climb rate main= |climb rate alt= |loading main= |loading alt= |thrust/weight= |power/mass main= |power/mass alt= |more performance= }} See also{{aircontent|related=
|similar aircraft=
|sequence= |lists=
|see also= }} ReferencesNotes1. ^This and subsequent Merlin and Metro models have a trimmable horizontal stabilizer (THS) usually used on jet aircraft, one of only a small number of turboprop aircraft to have this design feature (the competing Beechcraft Model 99 being another). 2. ^"Metro production dates." {{Webarchive|url=https://web.archive.org/web/20080620212124/http://meltingpot.fortunecity.com/pecan/617/propairliner.html |date=2008-06-20 }} {{webarchive|url=https://web.archive.org/web/20080620212124/http://meltingpot.fortunecity.com/pecan/617/propairliner.html |date=2008-06-20 }} fortunecity.com. Retrieved: August 21, 2011. 3. ^"Fairchild to Acquire Swearingen", "World News" (online archive version). Flight International, November 11, 1971, p. 751. Retrieved: December 15, 2008. 4. ^The article "Final Metro Delivery" in Airways magazine Issue 64 states that Metro deliveries totalled 18. The Metro production list shows that by the end of 1974, 22 Merlins had been built. 5. ^1 2 "Metro IV & V", Commuter Aircraft Directory,(online archive version). Flight International, May 7, 1988, p. 47. Retrieved: December 15, 2008. 6. ^"SA227-CC/-DC Type Certificate." FAA. Retrieved: December 15, 2008 7. ^1 Fricker, John. "At the NBAA Convention, Part 2 - the turboprop types", "Metroliner."Flight International, October 16, 1969, p. 595 (online archive version). Retrieved: December 15, 2008. 8. ^"Aeronews." Air Progress magazine, July 1969, pp. 19–20. 9. ^"Aero Engines 1970" (online archive version). Flight International, January 1, 1970, p. 15. Retrieved: December 15, 2008. 10. ^"Hanover review - General-aviation postscript", Flight International, May 7, 1970, p. 761 (online archive version). Retrieved: December 15, 2008. 11. ^"Swearingen production restarts, Air Transport: Light Commercial and Business (online archive version)." Flight International, March 2, 1972, p. 318. Retrieved: December 15. 2008. 12. ^1 "Fairchild Dornier Metro." {{Webarchive|url=https://web.archive.org/web/20090501220232/http://www.forecastinternational.com/archive/ca/ca3048.htm |date=2009-05-01 }} {{webarchive|url=https://web.archive.org/web/20090501220232/http://www.forecastinternational.com/archive/ca/ca3048.htm |date=2009-05-01 }} Forecast International.com. Retrieved: December 15, 2008. 13. ^, "NBAA Report - Fairchild launches Metro IV and V" (online archive version). Flight International, October 17, 1987, p. 20. Retrieved: December 15, 2008. 14. ^"Fairchild unveils new 25-seat Metro variant" (online archive version). Flight International, October 28, 1989, p. 16. Retrieved: December 15, 2008. 15. ^"TC-343" (the Fairchild c/n of a Metro IIA formerly registered in Australia). {{Webarchive|url=https://web.archive.org/web/20070913213112/http://www.tc.gc.ca/aviation/activepages/ccarcs/aspscripts/en/advancedsearch.asp |date=2007-09-13 }} {{webarchive|url=https://web.archive.org/web/20070913213112/http://www.tc.gc.ca/aviation/activepages/ccarcs/aspscripts/en/advancedsearch.asp |date=2007-09-13 }} Transport Canada Canadian civil aircraft register, online search. Retrieved: August 27, 2007. 16. ^"Canadian civil aircraft register." {{Webarchive|url=https://web.archive.org/web/20070913213112/http://www.tc.gc.ca/aviation/activepages/ccarcs/aspscripts/en/advancedsearch.asp |date=2007-09-13 }} {{webarchive|url=https://web.archive.org/web/20070913213112/http://www.tc.gc.ca/aviation/activepages/ccarcs/aspscripts/en/advancedsearch.asp |date=2007-09-13 }} Transport Canada, August 25, 2007. 17. ^"List of SA227-CCs registered in New Zealand." caa.govt.nz. Retrieved: December 15, 2008. 18. ^"Accident Report." Aviation Safety Database. Retrieved: August 26, 2007. 19. ^"Picture of the Fairchild C-26A Metro III (SA-227AC) aircraft." airliners.net. Retrieved: August 21, 2011. 20. ^"Picture of the Fairchild SA-227DC Metro 23 aircraft." airliners.net. Retrieved: August 21, 2011. 21. ^"Picture of the Fairchild C-26B Metro 23 (SA-227DC) aircraft." airliners.net. Retrieved: August 21, 2011. 22. ^"Picture of the Fairchild C-26B Metro 23 (SA-227DC) aircraft." airliners.net. Retrieved: August 21, 2011. 23. ^"Picture of the Fairchild C-26A Metro III (SA-227AC) aircraft." airliners.net. Retrieved: August 21, 2011. 24. ^"Picture of the Fairchild C-26A(RC) Metro III (SA-227AC) aircraft." airliners.net. Retrieved: August 21, 2011. 25. ^"Drug Wars: Barbados Swearingen C-26 Tiger Shark." Barbados Free Press, January 29, 2007. Retrieved: August 21, 2011. 26. ^The long-fuselage SA226/SA227 series has slightly outsold the Beechcraft 1900 series but many were built as Merlin corporate aircraft. The similarly-sized de Havilland Canada DHC-6 Twin Otter has outsold both types but is a different class of aircraft. 27. ^"Search: Metros, Beech 1900s, Embraer EMB 110 Bandeirante." {{Webarchive|url=https://web.archive.org/web/20070828231349/http://www.casa.gov.au/casadata/regsearch/findairs.asp |date=2007-08-28 }} {{webarchive|url=https://web.archive.org/web/20070828231349/http://www.casa.gov.au/casadata/regsearch/findairs.asp |date=2007-08-28 }} CASA Australian civil aircraft register. Retrieved: December 15, 2008. 28. ^1 2 "Final Metro Delivery." Airways magazine Vol. 8, No. 4; Issue 64, June 2001, p. 32. Airways International Inc. ISSN 1074-4320. 29. ^1 2 "Turboprop Production Lists." {{Webarchive|url=https://web.archive.org/web/20080620212124/http://meltingpot.fortunecity.com/pecan/617/propairliner.html |date=2008-06-20 }} {{webarchive|url=https://web.archive.org/web/20080620212124/http://meltingpot.fortunecity.com/pecan/617/propairliner.html |date=2008-06-20 }} fortunecity.com, August 25, 2007. 30. ^123 SA226-Ts (of which 31 were Merlin IIIBs built with assigned C/Ns intermingled with those of Metro IIs), and Merlin IIICs and 300s (35 SA227-TTs, of which 25 were IIICs and 10 were 300s; again with assigned C/Ns intermingled with Metros, in this case Metro III/Merlin IVCs). In addition, three SA226-ATs were converted on the production line as SA226-TCs; four SA226-TCs were similarly converted as SA226-ATs; and one short-fuselage SA227-TT was converted as a long-fuselage SA227-AC. These eight aircraft each had two different constructor's numbers of various model names. 31. ^{{cite web |url= https://www.flightglobal.com/asset/12798 |title= World Airliner Census |date= August 2016 |publisher= Flight Global}} 32. ^"Air Wisconsin Flight 965." National Transportation Safety Board. Retrieved: January 1, 2010. 33. ^"ASN Aircraft accident Swearingen SA226-TC Metro II N163SW Kearns, UT." Aviation Safety Net Retrieved: December 31, 2011. 34. ^"Trans-Colorado Airlines, Inc., Flight 2286 Fairchild Metro III, SA227 AC, N68TC Bayfield, Colorado I, January 19, 1988." {{Webarchive|url=https://web.archive.org/web/20080228062138/http://www.airdisaster.com/reports/ntsb/AAR89-01.pdf |date=2008-02-28 }} {{webarchive|url=https://web.archive.org/web/20080228062138/http://www.airdisaster.com/reports/ntsb/AAR89-01.pdf |date=February 28, 2008 }} National Transportation Safety Board. Retrieved: April 11, 2008. 35. ^"D-CABB accident synopsis". Aviation Safety Database. Retrieved: January 1, 2010. 36. ^Crey, Neil C. "Crew Resource Management." Transport Canada, 2005. Retrieved: February 10, 2011. 37. ^{{cite web|url=http://www.tsb.gc.ca/eng/rapports-reports/aviation/1995/a95h0008/a95h0008.asp|title=Aviation Investigation Report A95H0008|first=Government of Canada, Transportation Safety Board of|last=Canada|date=1996-04-04|website=www.tsb.gc.ca|accessdate=31 March 2018}} 38. ^BASI Investigation Report 9503057, {{ISBN|0-642-25638-1}}. 39. ^http://www.tsb.gc.ca/eng/rapports-reports/aviation/1998/a98q0087/a98q0087.asp Transportation Safety Board. Retrieved: June 13, 2017. 40. ^Summary of Australian Transport Safety Bureau accident report into the crash of Metro 23 VH-TFU Retrieved: April 11, 2008. 41. ^Price, Sarah and Mark Todd. "15 killed in our worst air crash in 36 years." Sydney Morning Herald website. Retrieved: April 11, 2008. 42. ^"LIVE - Six dead in Cork Airport plane crash." RTe/Ireland, February 10, 2011. Retrieved: February 10, 2011. 43. ^Hradecky, Simon. "Accident: Crash: Aerocon SW4 at Trinidad on Sep 6th 2011, missing aircraft found destroyed, one survivor." The Aviation Herald, September 7, 2011. 44. ^Hradecky, Simon. "Crash: Air Class SW4 near Flores Island on Jun 6th 2012, aircraft impacted Rio de la Plata." The Aviation Herald, June 7, 2012. 45. ^{{Cite web |url=http://www.eldeber.com.bo/ocho-muertos-en-siniestro-aereo-en-pista-de-riberalta/131104013658 |title=Local Newspaper |access-date=2013-11-05 |archive-url=https://web.archive.org/web/20131105025443/http://www.eldeber.com.bo/ocho-muertos-en-siniestro-aereo-en-pista-de-riberalta/131104013658 |archive-date=2013-11-05 |dead-url=yes |df= }} {{webarchive|url=https://web.archive.org/web/20131105025443/http://www.eldeber.com.bo/ocho-muertos-en-siniestro-aereo-en-pista-de-riberalta/131104013658 |date=2013-11-05 }} 46. ^{{cite web|url=http://www.cbc.ca/news/canada/thunder-bay/red-lake-plane-crash-that-killed-5-caused-by-engine-failure-tsb-says-1.3032494/|title=2013 Ontario plane crash that killed 5 caused by engine failure|publisher=}} 47. ^{{cite web|url=http://www.elnuevodia.com/apuntanauncambioderutacomomovildelfatalincidente-1657871.html|title=Apuntan a un cambio de ruta como móvil del fatal incidente|date=3 December 2013|publisher=}} 48. ^"Carson Air Flight 66: Search resumes in Vancouver's North Shore Mountains." CBC, April 14, 2015. 49. ^{{cite web|url=http://aviation-safety.net/database/record.php?id=20150602-0|title=ASN Aircraft accident Swearingen SA226-TC Metro II XA-UKP Querétaro Airport (QRO) |website=Aviation Safety Network |publisher=Flight Safety Foundation |access-date=June 3, 2015}} 50. ^{{cite news|title=French citizens killed in surveillance plane crash on Malta|url=https://www.bbc.com/news/world-europe-37749817|accessdate=24 October 2016|work=BBC News|date=24 October 2016}} 51. ^{{cite news|last1=Dearden|first1=Lizzie|title=Malta plane crash latest: French customs officials killed during take-off for people smuggling mission in Libya|url=https://www.independent.co.uk/news/world/europe/malta-plane-cras-eu-frontex-border-officials-killed-light-aircraft-luqa-libya-after-takeoff-a7377216.html|accessdate=24 October 2016|work=The Independent|date=24 October 2016}} 52. ^{{cite web|url=https://aviation-safety.net/database/record.php?id=20161205-0|title=ASN Aircraft accident Swearingen SA227-AC Metro III Albany-Southwest Georgia Regional Airport, GA (ABY/KABY)|website=Aviation Safety Network |publisher=Flight Safety Foundation |access-date=December 7, 2016}} 53. ^Donald 1997, p. 388. 54. ^The 14500 model may be modified to a max weight of 15,000 pounds, but the landing weight for that model remains at 14,000 pounds. 55. ^-11U-601G, -611G or -612G depending on propeller fitted 56. ^"Metro III UK Type Certificate." {{webarchive|url=https://web.archive.org/web/20061123183659/http://www.caa.co.uk/docs/393/srg_acp_fa43-03.pdf |date=2006-11-23 }} CAA. Retrieved: August 25, 2007. 57. ^"Fairchild-Swearingen Metro / Metroliner."flugzeuginfo Retrieved: July 18, 2014. 58. ^Simpson 1991, p. 321. Citations{{Reflist|colwidth=33em|refs=
Bibliography{{Refbegin}}
External links{{Commons category|Fairchild_Metroliner|Fairchild Swearingen Metroliner}}
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