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很久以来,人们曾想象有一种能从飞机上发射的空间飞行器,它能在起飞1小时40分钟之内飞过世界的任何地方。这是科学虚构吗?不,破音航空空间和普拉特与惠特尼公司已经对此作出回答。它们刚刚为美国空军完成的一项研究中,声称可以在1988年实现这一理想(见封四)。波音公司称这种飞行器为飞机上发射的出击式航天飞机(ALSV),它象航天飞机一样可以重复使用。ALSV不载人,它的飞行对美国的安全将发挥重要作用。如果认为有必要的话,它也可以改为载人飞行。
For a long time, people had imagined a spacecraft that could be launched from an aircraft that could fly anywhere in the world within 1 hour and 40 minutes of takeoff. Is this a science fiction? No, PGA and Pratt & Whitney have already answered that question. In a study they just completed for the U.S. Air Force, they claimed that this ideal could be achieved in 1988 (see cover IV). The Boeing Co. claims the aircraft is an onboard space shuttle (ALSV) that can be reused like a space shuttle. ALSV is not manned, its flight will play an important role in the security of the United States. It can also be changed to manned flight if deemed necessary.