久久久无码人妻精品无码_6080YYY午夜理论片中无码_性无码专区_无码人妻品一区二区三区精99

USEUROPEAFRICAASIA 中文雙語Fran?ais
Business
Home / Business / Industries

Maiden flight in holding pattern

By Wang Wen and Zhao Lei | China Daily | Updated: 2013-08-07 07:22

Maiden flight in holding pattern

Manufacturer pushes introduction of C919 large jetliner back one year

China's dream of having its first large commercial jetliner may have hit some turbulence, as the maiden test flight of the C919 will be delayed by a year to 2015.

Zhang Yanzhong, director of the program's advisory committee of experts and a member of the Chinese Academy of Engineering, said the program encountered difficulties due to the manufacturer's present level of technological expertise and experience building commercial aircraft, but that these are not major setbacks.

"Generally speaking, the project is going well now," he said on Tuesday, without elaborating on what the issues are.

Based on the project's progress, it is impossible to make the maiden test flight in 2014 as planned, said an official with the Commercial Aircraft Corp of China, builder of the C919.

The first delivery of the C919, planned for 2016, may also be delayed, said the official, who is familiar with the project but declined to be identified.

Wang Ya'nan, deputy editor-in-chief of Aerospace Knowledge magazine, said it will take at least two to three years for domestic and foreign authorities to authenticate the airworthiness of the C919.

"The earliest time for its delivery to buyers is likely to be in 2018 or 2019," Wang said.

Chinese airlines that placed orders for the jetliners said they will patiently wait for delivery.

"Only one year delay is OK for us, as it will not have much adverse effect on the airline's operations," said an official from a domestic airline who did not want to be named.

Maiden flight in holding pattern

By the end of 2012, at least 15 companies, most of them Chinese, agreed to buy 380 of the aircraft.

GE's aircraft leasing arm has signed on to take 20 of the C919 planes. Other customers include China's big three airlines - Air China, China Southern Airlines and China Eastern Airlines - and the leasing units of lenders such as Bank of China, Industrial and Commercial Bank of China, and Bank of Communications.

Material and component suppliers of the aircraft have not been informed about the schedule changes.

"We are still working on the projects in line with the original schedule," said Xu Yingbing, director of communications (Asia-Pacific) of Honeywell Aerospace.

Honeywell Aerospace provides major systems including guidance systems and auxiliary power units for the C919.

Honeywell International and CFM International, a venture between General Electric and Safran SA, are among the C919's major suppliers.

The program's delay is not a total surprise, experts said.

"I think the maiden flight of the C919 will be conducted in 2015, and it is quite natural that the date of the test flight is postponed," Wang said.

Development and testing of a new aircraft, especially a large jetliner, go through very complicated processes, he said, noting that companies like Boeing and Airbus had also delayed test flights.

Some of the postponements of Boeing and Airbus were caused by technical problems, but sometimes they were made out of commercial considerations, Wang said.

For instance, the company knew that it would take five years to develop a new aircraft but still announced that the maiden flight would be performed within four, Wang said.

"The reason they deliberately announced an early date was to grab the market," he said.

China is building the 168-seat plane as it tries to break the stranglehold of Airbus SAS and Boeing in the global market for aircraft of this size. Last year, COMAC, builder of the C919, asked its project designers to work 12-hour days and six-day weeks to meet the deadline for the maiden flight.

The C919 is not China's first attempt to build a large plane. From the early 1970s to the mid-1980s, China worked on the four-engine, narrow-body Y-10, but the project was eventually aborted after doubts over the aircraft's profitability and feasibility, although three prototypes had been manufactured.

"The C919 is hence the first, so it is logical that China may take a longer time to develop it," Wang said.

The biggest obstacle developers have to overcome is the propulsion system, he said.

"In addition, whether the test flight can be performed on schedule depends on the results of ground tests, which examine the performance of every system on the plane."

COMAC has started the parts and components manufacturing of C919, and it is working on the research of some key technologies, according to the company.

Bloomberg contributed to this story.

Most Viewed in 24 Hours
Copyright 1995 - . All rights reserved. The content (including but not limited to text, photo, multimedia information, etc) published in this site belongs to China Daily Information Co (CDIC). Without written authorization from CDIC, such content shall not be republished or used in any form. Note: Browsers with 1024*768 or higher resolution are suggested for this site.
License for publishing multimedia online 0108263

Registration Number: 130349
FOLLOW US
 
久久久无码人妻精品无码_6080YYY午夜理论片中无码_性无码专区_无码人妻品一区二区三区精99

    精品一区二区三区久久久| www.亚洲国产| 久久色视频免费观看| 国产91精品在线观看| 国产精品福利一区二区| 日本丰满少妇一区二区三区| 午夜视频在线观看一区二区 | 成人av在线观| 一区二区三区精品在线观看| 宅男在线国产精品| 国产一区二区在线观看免费| 国产精品美女久久久久久久久久久| 91在线观看地址| 日韩福利视频导航| 国产欧美一区二区精品性色| 色欧美乱欧美15图片| 免费一区二区视频| 国产精品麻豆99久久久久久| 在线精品观看国产| 免费看日韩精品| 国产精品污污网站在线观看| 在线视频一区二区三区| 精品一区二区影视| 18成人在线观看| 日韩欧美成人一区二区| 91在线一区二区三区| 日本免费新一区视频| 国产三区在线成人av| 欧美无砖砖区免费| 国产乱子伦一区二区三区国色天香| 亚洲欧美激情一区二区| 精品国产凹凸成av人导航| 91色porny蝌蚪| 韩国av一区二区三区| 亚洲影院在线观看| 国产日韩欧美麻豆| 欧美日本一区二区三区四区| 成人三级伦理片| 免费观看在线综合色| 亚洲日本va午夜在线电影| 欧美一级生活片| 一本色道久久加勒比精品| 精品在线视频一区| 亚洲午夜电影在线| 中文一区在线播放| 日韩一二在线观看| 色婷婷综合久久久中文字幕| 国产美女精品一区二区三区| 亚洲成a人片综合在线| 国产精品乱码久久久久久| 欧美一级午夜免费电影| 一本色道久久综合精品竹菊| 国产精品77777| 蜜臀久久久99精品久久久久久| 亚洲激情av在线| 国产三级一区二区| 日韩欧美一区二区视频| 欧洲生活片亚洲生活在线观看| 国产精品一区二区在线看| 五月激情综合婷婷| 亚洲免费观看高清| 国产精品丝袜黑色高跟| 欧美精品一区二区在线观看| 欧美精品1区2区3区| 91久久精品国产91性色tv| 国产ts人妖一区二区| 久久99久久99| 免费欧美日韩国产三级电影| 亚洲国产精品影院| 亚洲天堂2016| 国产精品美女视频| 久久蜜桃一区二区| 欧美变态口味重另类| 欧美日韩精品免费| 欧美中文字幕一区二区三区| jlzzjlzz国产精品久久| 国产宾馆实践打屁股91| 国产在线国偷精品免费看| 麻豆国产精品视频| 日本系列欧美系列| 丝瓜av网站精品一区二区| 亚洲一级电影视频| 一级日本不卡的影视| 亚洲男人的天堂av| 1000精品久久久久久久久| 国产精品理论在线观看| 国产亚洲成aⅴ人片在线观看 | 丁香婷婷综合激情五月色| 国产精品白丝av| 国产一区日韩二区欧美三区| 久久精工是国产品牌吗| 久久福利资源站| 久久成人免费电影| 黑人精品欧美一区二区蜜桃| 狠狠色狠狠色综合| 国产一区免费电影| 国产高清不卡一区二区| 国产成人午夜99999| 高清视频一区二区| 成人白浆超碰人人人人| 成人黄色小视频| 99re亚洲国产精品| 91蜜桃网址入口| 91成人在线精品| 欧美在线你懂的| 欧美日韩国产一级片| 91精品国产综合久久精品图片| 欧美情侣在线播放| 欧美一级片在线观看| 欧美大胆一级视频| 久久久久久亚洲综合| 亚洲国产精品激情在线观看| 亚洲欧美自拍偷拍色图| 亚洲最新在线观看| 日韩极品在线观看| 韩国精品免费视频| 国产suv一区二区三区88区| 成人黄色在线网站| 色综合久久综合网97色综合| 欧美午夜精品免费| 欧美一级理论片| 久久久精品天堂| 中文字幕亚洲一区二区va在线| 一片黄亚洲嫩模| 日本不卡视频一二三区| 国产一区二区精品久久99| 成人激情黄色小说| 在线观看国产一区二区| 91精品国产福利| 国产清纯白嫩初高生在线观看91 | 亚洲福利电影网| 麻豆91在线播放| 国产不卡在线播放| 91久久香蕉国产日韩欧美9色| 欧美精品一二三| 久久精品夜色噜噜亚洲aⅴ| 中文字幕高清一区| 亚洲一区二区三区自拍| 伦理电影国产精品| 成人免费av在线| 欧美偷拍一区二区| 精品国产乱码久久久久久老虎| 国产欧美视频一区二区| 一区二区三区四区不卡视频| 免费观看在线综合色| 成人av在线资源网| 欧美日韩国产高清一区二区 | 久久精品亚洲精品国产欧美kt∨| 中文字幕一区二区三区精华液| 婷婷开心久久网| 成人综合在线视频| 欧美日本免费一区二区三区| 国产婷婷色一区二区三区| 亚洲激情五月婷婷| 国产在线国偷精品免费看| 91福利资源站| 精品日产卡一卡二卡麻豆| 亚洲精品免费在线| 久草热8精品视频在线观看| 色综合天天性综合| 精品国产乱码久久久久久浪潮 | 在线电影欧美成精品| 国产欧美一区二区精品性色超碰| 亚洲国产人成综合网站| 国产成人精品影视| 在线成人免费视频| 国产精品网站在线播放| 亚洲国产精品一区二区尤物区| 国产成+人+日韩+欧美+亚洲| 欧美精品在欧美一区二区少妇| 国产精品女主播在线观看| 人人精品人人爱| 色偷偷久久人人79超碰人人澡| 精品国产免费一区二区三区四区| 夜夜亚洲天天久久| 顶级嫩模精品视频在线看| 欧美一区二区成人6969| 一区二区视频在线| 国产成人精品综合在线观看| 欧美剧情电影在线观看完整版免费励志电影 | 日韩欧美国产综合一区| 亚洲精品视频一区| 国产aⅴ精品一区二区三区色成熟| 欧美肥妇bbw| 亚洲精品国产精华液| 国产宾馆实践打屁股91| 日韩欧美国产精品一区| 亚洲午夜日本在线观看| 99麻豆久久久国产精品免费优播| 欧美精品一区二区三区很污很色的| 亚洲一区二区三区影院| yourporn久久国产精品| 久久久777精品电影网影网| 蜜臀av一级做a爰片久久| 欧美丝袜自拍制服另类| 国产精品国产自产拍高清av王其| 激情五月婷婷综合网| 日韩一区二区三区电影在线观看 | 亚洲不卡在线观看| 91网站在线观看视频|