据西方专家报导,俄国已对一种有重大改进的发动机进行了飞行试验,这标志着国际上在寻求超音速动力装置推动未来空天飞机方面有了重大进展。这次以氢为燃料的超燃冲压发动机的飞行试验,于1991年11月末在拜科努尔航天中心由莫斯科航空发动机研究中心负责进行。俄国计划领导人告知西方当局,飞行试验已进行,飞行器(过去作为试飞器)性能符合设计要求。 According to reports from Western experts, Russia has conducted flight tests on a significantly improved engine, marking a major international move to find supersonic power plants to propel future space shuttles. The flight test of this hydrogen-fueled scramjet was conducted by the Moscow Aeronautic Engine Research Center at the Baikonur Space Center in late November 1991. Russian plan leaders told Western authorities that flight tests have been conducted and that the aircraft (formerly a test aircraft) meets the design requirements.