日本的 H-2运载火箭的首次飞行很可能要推迟到1993年下半年进行。原计划于今年初进行的首次发射因第一级低温发动机 LE-7出现故障而被迫推迟。1月16日 LE-7发动机成功地进行了350s 的热试车,这是6个多月以来经过几次提前关机、着火和一次爆炸事故之后的首次成功试验。但在5天后进行的一次350s 全程试车中又提前10s 关机。尽管发动机试验不断出现故障,日本宇宙开发事业团于2月27日在其种子岛的发射场进行了 H-2火箭模型的模拟发射。包括两个固体火箭助推器在 The first flight of Japan’s H-2 launch vehicle is likely to be postponed until the second half of 1993. The original launch planned for early this year was delayed for the first-stage low-temperature engine LE-7 that failed. The successful test run of the 350-second LE-7 engine on January 16 was the first successful test after more than six months of shutdown, fire and an explosion. But in 5 days after a 350s full test run and shutdown in advance 10s. Despite ongoing engine test failures, the JAXA conducted a simulated launch of the H-2 rocket model at its launch site at Tanegashima on February 27. Includes two solid rocket boosters at