由于里根总统鼓励私营企业积极参加航天活动,美国太平洋运载系统公司正在研制一种新式的航天运载器——“菲尼克斯”(Phoenix)。这种航天运载器的外形象个削钝了的圆锥体,高度为17.4米,底部直径约等于高度的二分之一。它与传统运载火箭的区别在于它采用了别具一格的推进系统。过去的火箭发动机一般都使用喇叭形喷管,这些喷 As President Reagan encourages private companies to actively participate in space activities, Pacific Carrier Systems is developing a new type of spacecraft, the “Phoenix.” The spacecraft’s profile resembles a dull cone with a height of 17.4 meters and a diameter at the bottom equal to about one-half the height. It is different from the traditional launch vehicle is that it uses a unique propulsion system. The past rocket engines generally use the horn nozzle, these spray