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

    成人免费av在线| 欧美日韩不卡一区| 高清免费成人av| 国产精品伦一区| 91小视频在线观看| 亚洲成在线观看| 欧美一区二区三区电影| 韩国精品久久久| 国产精品美女久久福利网站| 色哟哟亚洲精品| 视频在线在亚洲| 久久综合狠狠综合久久激情| 不卡影院免费观看| 亚洲精品国产无天堂网2021| 欧美丰满一区二区免费视频| 国产一区二区电影| 亚洲蜜臀av乱码久久精品| 在线成人av网站| 国产成人久久精品77777最新版本| 成人欧美一区二区三区在线播放| 欧美日韩国产免费| 国产一区二区三区高清播放| 亚洲三级电影网站| 日韩丝袜情趣美女图片| 成人一区二区视频| 天堂一区二区在线| 欧美国产日产图区| 5月丁香婷婷综合| 国产激情精品久久久第一区二区| 亚洲一区二区在线观看视频| 精品理论电影在线| 色婷婷久久一区二区三区麻豆| 日韩中文字幕不卡| 国产精品乱人伦| 4hu四虎永久在线影院成人| 国产成人综合网| 天堂一区二区在线免费观看| 久久99久久精品| 国产精品久久精品日日| 欧美一卡二卡三卡| 92精品国产成人观看免费| 九一九一国产精品| 一区二区三区在线观看动漫| 精品国产一区二区三区久久影院| 91黄视频在线观看| 国产精品99久| 日韩精品欧美成人高清一区二区| 国产精品美女久久久久久久久久久| 在线电影国产精品| 91麻豆精东视频| 国产精品自产自拍| 日韩激情av在线| 亚洲视频免费在线观看| 精品国精品国产| 欧美日韩精品电影| 99久久夜色精品国产网站| 久久国产综合精品| 亚洲香肠在线观看| 国产精品乱码人人做人人爱| 日韩欧美一级二级三级久久久| 欧美性淫爽ww久久久久无| 成人午夜在线免费| 激情综合网最新| 性做久久久久久久免费看| 亚洲免费观看视频| 国产亚洲福利社区一区| 日韩亚洲欧美在线| 欧美日韩国产美女| 欧美中文字幕一区| 91蜜桃在线观看| 成人高清视频在线观看| 国精产品一区一区三区mba视频| 婷婷成人激情在线网| 亚洲色欲色欲www在线观看| 国产日韩欧美精品综合| 日韩精品一区二区三区中文不卡| 欧美日韩一级二级| 在线观看亚洲专区| 97se亚洲国产综合自在线观| 国产不卡免费视频| 国产麻豆9l精品三级站| 精品中文av资源站在线观看| 免费美女久久99| 日本成人在线不卡视频| 亚洲第一成人在线| 亚洲二区在线视频| 亚洲精品免费在线观看| 日韩毛片在线免费观看| 国产精品免费观看视频| 中文字幕精品综合| 欧美国产日韩亚洲一区| 国产日韩精品久久久| 久久精品网站免费观看| 精品国产凹凸成av人导航| 日韩欧美电影一区| 精品少妇一区二区三区免费观看 | 精品99一区二区三区| 日韩女优毛片在线| 日韩精品一区二区在线| 欧美mv日韩mv亚洲| 精品奇米国产一区二区三区| 精品久久久久久久久久久久久久久久久| 欧美一区二区视频网站| 欧美一区二区三区四区久久 | 久久久美女艺术照精彩视频福利播放| 欧美电影免费观看高清完整版在线 | 粉嫩av一区二区三区在线播放| 国内久久婷婷综合| 国产一区二区毛片| 成人性生交大合| 成人看片黄a免费看在线| www.亚洲色图| 日本韩国欧美在线| 欧美日韩国产综合一区二区三区| 制服丝袜国产精品| 精品国产一区二区三区久久久蜜月| 日韩免费看的电影| 久久久噜噜噜久久中文字幕色伊伊 | 亚洲色欲色欲www在线观看| 亚洲免费在线观看| 亚洲一二三四久久| 丝袜亚洲另类丝袜在线| 免费在线一区观看| 国产一区日韩二区欧美三区| 福利电影一区二区三区| 91在线视频免费91| 欧美日韩高清影院| 欧美成人a视频| 亚洲国产精品高清| 亚洲激情在线激情| 日韩在线观看一区二区| 韩国中文字幕2020精品| 成人av在线一区二区三区| 色噜噜久久综合| 91精品国产综合久久精品图片| 精品国产第一区二区三区观看体验| 国产欧美1区2区3区| 亚洲激情中文1区| 男男gaygay亚洲| 成人免费视频一区二区| 欧美三级韩国三级日本一级| 一二三区精品福利视频| 麻豆精品一区二区三区| 成人激情校园春色| 欧美日韩精品一区二区天天拍小说| 欧美xxxx老人做受| 中文字幕在线观看不卡视频| 午夜av一区二区| 国产精品一区二区果冻传媒| 91色在线porny| 日韩精品一区国产麻豆| 最新国产成人在线观看| 日韩国产高清在线| 成人性生交大片免费看中文网站| 欧美婷婷六月丁香综合色| 精品av久久707| 亚洲在线成人精品| 国产一区二区三区在线看麻豆| 91九色02白丝porn| 26uuu另类欧美| 一区二区三区四区国产精品| 久久国产精品露脸对白| 91麻豆国产福利在线观看| 精品少妇一区二区三区免费观看 | 成人综合婷婷国产精品久久 | 亚洲小说欧美激情另类| 国产在线视频不卡二| 在线观看欧美日本| 精品福利一区二区三区免费视频| 亚洲免费在线播放| 国产精品主播直播| 欧美伦理电影网| 亚洲欧美综合另类在线卡通| 毛片av一区二区| 色www精品视频在线观看| 欧美精品一区二| 亚洲成人免费看| 99久久精品免费精品国产| 欧美电影免费观看高清完整版在线观看 | 欧美午夜精品电影| 国产人成亚洲第一网站在线播放 | 国产一区二区三区免费观看| 欧美日韩国产综合视频在线观看| 亚洲国产精品ⅴa在线观看| 免费精品视频在线| 欧美优质美女网站| 国产精品青草综合久久久久99| 麻豆成人久久精品二区三区红| 色欧美日韩亚洲| 中文字幕av资源一区| 国内精品久久久久影院一蜜桃| 欧美日韩国产一区| 亚洲女同一区二区| 懂色中文一区二区在线播放| 日韩精品最新网址| 舔着乳尖日韩一区| 精品视频在线免费观看| 亚洲三级久久久| va亚洲va日韩不卡在线观看| 久久久国产精品午夜一区ai换脸|