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Comac ARJ21
The Comac ARJ21 Xiangfeng () is a twin-engined regional jet, manufactured by Comac.
==Development==
The development of the ARJ21 (Advanced Regional Jet) is a key project in the "10th Five-Year Plan" of China. It began in March 2002 and was led by the state-owned ACAC consortium. The maiden flight of the ARJ21 was initially planned to take place in 2005 with commercial service beginning 18 months afterwards.〔(【引用サイトリンク】 work = People's Daily )〕 The programme was to become 8 years behind schedule.〔(''C919 Inches Toward Flight-Testing, ARJ21 Toward Upgrade'' ), Aviationweek, 3. November 2014〕
The design work was delayed and the final trial production stage did not begin until June 2006.〔(【引用サイトリンク】 work=XINHUA )〕 The first prototype (serial number 101) rolled out on 21 December 2007, with plans for a maiden flight in March 2008.〔 This was first delayed to 21 September 2008 and finally took place on 28 November 2008 at Shanghai's Dachang Airfield.〔(【引用サイトリンク】 work=Huanqiu )〕 The aircraft completed a long distance test flight on 15 July 2009, flying from Shanghai to Xi'an in 2 hours 19 minutes, over a distance of 1,300 km. The second ARJ21 (serial number 102) completed the same test flight route on 24 August 2009. The third aircraft (serial number 103) similarly completed its first test flight on 12 September 2009.〔(【引用サイトリンク】 work=CCTV )〕 The fourth aircraft (CN 104) flew by November 2010. By August 2011, static, flutter and crosswind flight tests had been completed.〔 Deliveries to customers were expected to begin in late 2010, starting with Chengdu Airlines.
The ACAC consortium initially aimed to manufacture 11 ARJ21s a year by 2010, and 30 per year by 2015. In 2009 the consortium was reorganized and became a part of COMAC.〔information on COMAC's (website ) (Chinese)〕
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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