California Institute of Technology aerodynamicist Tsien Hsue-shen coined the term hypersonics in 1946 to broadly describe flight at speeds of Mach 5 and higher. With the growing belief in some defense circles that speed could be the new stealth for the 21st century, research in this regime continues to focus mainly on key issues associated with aerodynamic heating, propulsion and flight control.  Hypersonic weapons offer advantages in four broad areas. According to a 2015 report by ...

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