www射-国产免费一级-欧美福利-亚洲成人福利-成人一区在线观看-亚州成人

Latest News

Jumbo rocket design poses challenges

By Xin Dingding (China Daily)
Updated: 2013-03-04 06:43

"Scientists are mulling over the idea of using it to launch a manned spaceship in the future, too," said Liang. "If so, the Long March-7 will become the country's only rocket that can send manned and unmanned spacecraft into space."

The Long March-11 is also in development, China's first launch vehicle using solid fuel, which is expected to make its first launch before 2016.

"The development of Long March-11 will greatly improve China's capabilities to rapidly enter space and meet the demand for emergency launches in case of accidents," he said.

The carrier rocket will be easy to operate and cost-efficient to launch, and it can be stored for long periods to launch at short notice.

"If a major earthquake - like the one that rocked Wenchuan of Sichuan province in 2008 - strikes again, we will be able to quickly send satellites into space that can take photos of the devastated area and help with rescue work," Liang said.

Time to mature

Liang expects the next generation of carrier rockets will operate together with earlier models to serve space missions for the next 10 to 20 years.

"A new launch vehicle will not be fully reliable until it carries out at least 10 missions where hidden problems can be exposed and fixed. Sometimes, even after a model has carried out many missions, deeper technical problems will not emerge until it encounters special situations in space," he said.

Time is also needed for the new generation of launch vehicles to become competitive in cost, too, he added.

By then, China's launch systems will be able to send payloads from 1 to 25 tons into three levels of orbit, ranging from 200 km to 35,000 km altitude, and meet the demands of China's short- and mid-term space programs.

But to meet long-term space goals, China will need to develop a rocket with a takeoff thrust of 3,000 tons, three times that of Long March-5, which will be able to send men to the moon.

Research on a heavy-thrust launch vehicle has been carried out in the past years. Scientists visualize a rocket with a diameter of at least 8 meters, able to send a 100-ton payload into low earth orbit.

The academy aims to have the heavy-thrust rocket project approved by the government under the 12th Five-Year Plan period (2011-15), Liang said.

"If approved, China will stand in the same line as space powers such as the United States and Russia regarding launch vehicles, which is the precondition for all space activities," he said.

xindingding@chinadaily.com.cn

Previous Page 1 2 Next Page

8.03K
主站蜘蛛池模板: 色九九 | 白白在线观看永久免费视频 | 国产三级精品久久三级国专区 | 小毛片在线观看 | 啪视 | 激情一区二区三区成人 | 免费成年人在线视频 | 99福利资源久久福利资源 | 毛片在线看免费 | 亚洲一区二区免费看 | 黄色美女网站视频 | 亚洲精品欧洲一区二区三区 | 失禁h啪肉尿出来高h男男 | 夜色成人性y | 一级做a爰片性色毛片男 | 国产精品一区高清在线观看 | 80日本xxxxxxxxx | 日韩美a一级毛片 | 国产乱子伦在线观看不卡 | 国产高清自拍 | 国产三级视频在线播放 | 国产视频一区二区三区四区 | 成人区视频爽爽爽爽爽 | 国产一级小视频 | 精品一区二区三区在线成人 | 国产福利片在线 易阳 | 国产一区二区三区在线视频 | japonensis国产福利| 欧美性猛交xxxxxxxx软件 | 在线看片欧美 | 三级精品在线观看 | 久久久久久久久免费影院 | 欧美成人一区二区三区在线视频 | 她也啪97在线视频 | 黄色一级毛片免费 | 日本一级全黄大片 | 99久久综合狠狠综合久久一区 | 一区二区三区在线免费观看视频 | 亚洲国内| 国产永久在线视频 | 99精品欧美一区二区三区 |