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H-Ⅱ火箭是日本自己设计、自1983年开始研制并准备参与国际发射市场竞争、可与阿里安-5运载火箭相媲美的大型运载火箭。世界各国的航天专家对H-Ⅱ火箭的研制和进展情况非常关心,日本对自己的这一计划也抱有很大希望。然而,连续4次发动机故障使NASA的专家们忧心忡忡,特别是1991年8月9日试车时,发动机爆炸,三菱重工的一位技师当场丧命,使人们对H-Ⅱ能否按期发射打了个大问号。三菱重
H-II rocket is Japan’s own design, since 1983, developed and ready to participate in the international launch market competition, with the Ariane-5 launch vehicle comparable to the large launch vehicle. Aerospace experts from all countries in the world are very concerned about the development and progress of H-II rockets. Japan also holds great hopes for this plan. However, NASA experts were worried about four consecutive engine failures. In particular, when a test run on August 9, 1991, the engine exploded and a Mitsubishi Heavy Industries technician died on the spot, people were asked whether H-II could be fired on schedule Big question mark Mitsubishi heavy