论文部分内容阅读
日本几家大航宇公司正在研制H2大型火箭。预计1991年底或1992年初试射技术实验卫星-6;1995年投入实用,将发射日本第四代通信卫星(CS-4)和广播卫星(BS-4)。按1984年货币值估计H2研制费约为两千亿日元(折合八亿五千万美元),而H1则耗资一千八百亿日元。仅H2第三级LE-5发动机就需资七亿九千五百万日元。如果日
Several major aerospace companies in Japan are developing a large H2 rocket. It is expected that the experimental technology satellite-6 will be tested by the end of 1991 or early 1992 and put into practical use in 1995 and will launch Japan’s fourth-generation communications satellite (CS-4) and broadcasting satellite (BS-4). According to the 1984 monetary value H2 development costs estimated at about 200 billion yen (equivalent to 850 million US dollars), while H1 will cost 180 billion yen. H2-only LE-5 engine costs 795 million yen. If day