世界最大运输机“平流层发射”在美国亮相
文章来源:未知 文章作者:enread 发布时间:2017-06-10 05:42 字体: [ ]  进入论坛
(单词翻译:双击或拖选)
GIGANTIC
 
The Stratolaunch aircraft is enormous, with a wingspan totaling 385 feet (117 meters), longer than the wingspan of any other aircraft and greater than the length of an American football field.
 
Among commonly seen aircraft, the double-decker Airbus A380's wings span 262 feet (nearly 80 meters).
 
WEIGHT AND POWER
 
The Stratolaunch aircraft weighs 500,000 pounds (226,799 kilograms) empty, can carry 250,000 pounds (113,399 kilograms) of fuel, and with payload can take off at a maximum weight of 1.3 million pounds (589,676 kilograms).
 
It is powered by six engines of the same type used by Boeing 747s.
 
AIR LAUNCH
 
On launch missions, Stratolaunch will carry as many as three rockets attached to the center of the wing between the two fuselages. The rockets will be released, ignite their engines and carry small satellites weighing up to 1,000 pounds (453.6 kilograms) to low Earth orbit.
 
According to Stratolaunch, the advantages of its system include being able to use numerous airports and avoid the limitations of fixed1 launch sites which can be impacted by weather, air traffic and ship traffic on ocean ranges.
 
HISTORY
 
Airborne launches date back decades, most famously to the X-15 program of the 1950s and '60s, when manned rocket planes were carried aloft under the wing of a B-52 bomber2 and released on hypersonic research flights.
 
In the 1990s, Orbital Sciences Corp. (now Orbital ATK) began releasing rockets from the belly3 of a converted L-1011 airliner4 to put small satellites into low Earth orbit.
 
More recently, Paul Allen, the Microsoft co-founder, funded development of the Burt Rutan-designed SpaceShipOne, the first privately5 developed manned spacecraft.
 
Suspended between the twin-fuselages of a special jet, SpaceShipOne was carried to high altitude and released. It reached space on three suborbital flights in 2004.
 
The same launch concept is being used for SpaceShipTwo, the passenger-carrying craft being developed for Sir Richard Branson's Virgin6 Galactic space tourism enterprise.


点击收听单词发音收听单词发音  

1 fixed JsKzzj     
adj.固定的,不变的,准备好的;(计算机)固定的
参考例句:
  • Have you two fixed on a date for the wedding yet?你们俩选定婚期了吗?
  • Once the aim is fixed,we should not change it arbitrarily.目标一旦确定,我们就不应该随意改变。
2 bomber vWwz7     
n.轰炸机,投弹手,投掷炸弹者
参考例句:
  • He flew a bomber during the war.他在战时驾驶轰炸机。
  • Detectives hunting the London bombers will be keen to interview him.追查伦敦爆炸案凶犯的侦探们急于对他进行讯问。
3 belly QyKzLi     
n.肚子,腹部;(像肚子一样)鼓起的部分,膛
参考例句:
  • The boss has a large belly.老板大腹便便。
  • His eyes are bigger than his belly.他眼馋肚饱。
4 airliner Azxz9v     
n.客机,班机
参考例句:
  • The pilot landed the airliner safely.驾驶员使客机安全着陆。
  • The passengers were shepherded across the tarmac to the airliner.旅客们被引导走过跑道去上飞机。
5 privately IkpzwT     
adv.以私人的身份,悄悄地,私下地
参考例句:
  • Some ministers admit privately that unemployment could continue to rise.一些部长私下承认失业率可能继续升高。
  • The man privately admits that his motive is profits.那人私下承认他的动机是为了牟利。
6 virgin phPwj     
n.处女,未婚女子;adj.未经使用的;未经开发的
参考例句:
  • Have you ever been to a virgin forest?你去过原始森林吗?
  • There are vast expanses of virgin land in the remote regions.在边远地区有大片大片未开垦的土地。
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