霍托尔的发动机揭秘英国霍托尔航天飞机的发动机方案自提出以来一直处于保密状态。最近，英国政府改变了其原来的政策，规定如没有特殊理由，不准对专利技术进行保密。在这种情况下，这种称为ＲＤ５４５的发动机的一些技术细节终于大白于天下。以下首先介绍该发动机在方案... Hortor’s engine revealed that the UK’s Hortor space shuttle’s engine program has been kept confidential since it was introduced. Recently, the British government changed its original policy of providing that patent technology should not be kept confidential without special reasons. In this case, some of the technical details of the engine, called the RD545, have finally come to light. Following the first introduction of the engine in the program ...