由NASA主持的美国HSCT(高速民用运输机)计划,已完成了预研阶段(可行性研究),第一阶段(大气环境适应性研究),并提前二年进入了第二阶段——气动、机体材料与结构研究.22年前,美国国会曾明确取消了FAA/波音联合提出的SST(超音速运输机)计划,自那以来这项计划一直以小规模的、零散性的课题或计划被延续着.最近两年来,NASA和美国航空工业界却一反常态,显示出从未有过的热心,极力鼓动政府拨出大量资金全力支持这项计划.NASA声称,必须从过去的小尺寸的部件试验和设计研究转入大尺寸的 The US HSCT (High-speed Civil Transport Plan) hosted by NASA has completed the pre-research phase (feasibility study), the first phase (atmospheric environment adaptability study), and entered the second phase two years ahead of time - pneumatic, body Materials and Structure Research. Twenty-two years ago, the U.S. Congress had explicitly canceled the FAA/Boeing joint SST (Supersonic Transport Plan) program. Since then, the plan has been continued on small-scale, fragmented topics or plans. In the past two years, NASA and the U.S. aviation industry have gone against the norm. They have shown that they have never had the enthusiasm and strongly encouraged the government to allocate a large amount of funds to fully support this project. NASA claims that it must be tested and designed from past small-sized components. Research into large-scale