技术创新是航空航天业发展的关键所在。不可否认的是,美国航空工业今日的强大与其长期大力提倡技术创新有着非常紧密的关系。以航空推进技术的发展方式为例,20年前,美国开始实施了一项国家级涡轮发动机技术发展计划,即综合高性能涡轮发动机技术(IHPTET)计划,其目标是到2005年使航空推进系统的能力翻一番,即推重比或功率重量比增加100%～120%,耗油率下降15%～30%。目前,该计划已经顺利结束,并获得了丰硕成果,美国军民用发动机的改型以及新型号的开发,很多都从这一计划中获益,确切地说,它使航空推进系统的性能达到了一个新的 Technological innovation is the key to the development of the aerospace industry. It is undeniable that the strength of the U.S. aviation industry today has a very close relationship with its long-term promotion of technological innovation. Take the development of aeronautical propulsion technology as an example. Twenty years ago, the United States started the implementation of a national-level turbine engine technology development plan, that is, the IHPTET (High Performance Turbine Engine Technology) project, which aims to bring the Aeronautical Propulsion System Double the capacity, that is, push to weight ratio or power to weight ratio increased by 100% to 120%, fuel consumption decreased by 15% to 30%. At present, the plan has been successfully concluded and has achieved fruitful results. The U.S. military and civilian engine retrofit and the development of new models have benefited greatly from this plan. To be exact, it has achieved the performance of an air propulsion system a new one