日批在线视频_内射毛片内射国产夫妻_亚洲三级小视频_在线观看亚洲大片短视频_女性向h片资源在线观看_亚洲最大网

US EUROPE AFRICA ASIA 中文
World / US and Canada

Pilot actions examined in US crash of Virgin Galactic space

(Agencies) Updated: 2014-11-04 14:43

Pilot actions examined in US crash of Virgin Galactic space

Investigators from the National Transportation Safety Board (NTSB) look at wreckage from the crash of Virgin Galactic's SpaceShipTwo near Cantil, California November 2, 2014. [Photo/Agencies]

Hart told a news conference on Sunday that investigators had determined SpaceShipTwo's tail system was supposed to have been released for deployment as the craft was traveling about 1.4 times the speed of sound. Instead, the tail section began pivoting when the vehicle was flying at Mach 1, the speed of sound.

"I'm not stating that this is the cause of the mishap. We have months and months of investigation to determine what the cause was," Hart said.

Asked if pilot error was a possible factor, Hart said: "We are looking at all of these issues to determine what was the root cause of this mishap ... including that possibility."

Also unclear was how exactly the tail mechanism, once it was unlocked, began to rotate, since that maneuver requires a separate pilot command that was never given, Hart said. This raised questions about whether the craft's position in the air and its speed somehow enabled the tail section to swing free on its own.

SpaceShipTwo was released normally from the carrier jet WhiteKnightTwo at an altitude of about 45,000 feet. The rocket motor, fueled for the first time in flight with a new plastic-based propellant formula, then ignited as planned, Hart said.

SpaceShipTwo's fuel tanks and engine were recovered intact, indicating there was no explosion. "The engine burn was normal up until the extension of the feathers," Hart told reporters.

About 800 people have paid or put down deposits for a ride into space at $250,000 a seat, and Branson plans to be on the first commercial flight with his son.

Branson said Monday his company's venture was "absolutely" worth the risks. "It's a grand program, which has had a horrible setback, but I don't think anybody... would want us to abandon it at this stage," he told NBC.

Virgin Galactic is about two-thirds finished building the second of its five planned space tourism vehicles, and was determining how the crash probe would alter its production schedule, chief executive George Whitesides told Reuters.

Virgin Galactic is a U.S. offshoot of the London-based Virgin Group founded by Branson, whose empire ranges from airlines to music stores and mobile phones.

Previous Page 1 2 Next Page

Trudeau visits Sina Weibo
May gets little gasp as EU extends deadline for sufficient progress in Brexit talks
Ethiopian FM urges strengthened Ethiopia-China ties
Yemen's ex-president Saleh, relatives killed by Houthis
Most Popular
Hot Topics

...
主站蜘蛛池模板: 狠狠操伊人 | jizz日本在线播放 | 国产精品av久久久久久无 | 亚洲福利视频网 | 亚洲人人人 | 午夜精品免费观看 | 国产日韩在线免费观看 | 成人爽爽视频 | 欧美黄色录像片 | 久久97| 国产成人自拍网站 | 国产免费黄色大片 | 四虎成人精品 | 国产免费看黄 | 超碰98在线观看 | 成人p站在线观看 | 就操成人网 | 成人一区二区三区四区 | 日日操免费视频 | 精品福利一区 | 九九九国产视频 | 欧美精品一区二区视频 | 亚洲狠狠操| 日韩一级黄 | 毛片在线免费观看视频 | 成人在线三级 | 国产一区二区三区视频 | 青青草国产在线 | 日韩小视频在线 | 日韩精品乱码 | 亚色综合| 又色又爽 | 午夜免费av | 自拍色图 | 欧产日产国产v | av色婷婷 | 国产三级精品三级在线观看 | 久久夜靖品2区 | 亚洲综合五月 | 九九国产视频 | 国产高清在线观看 |