摘要: |
For over five decades, the National Aeronautics and Space Administration (NASA) has been studying
the fundamental physics and technologies to support the development of a hypersonic aircraft
(vehicles flying in excess of Mach 5). Much of this research has logically focused on the fundamentals
of propulsion, guidance, and control. In the past two decades, there has been a flurry of activity to field
test air-launched hypersonic vehicles (NASA X-43 and X-51 platforms, for example) to integrate the
knowledge and understanding gathered to date and as a precursor for the research and development
(R&D) of various military applications of hypersonic flight, which other countries are pursuing as well. |