Hypersonics
via history.nasa.gov
Short excerpt below. Read at the original source.
Hypersonics Conceptual hypersonic vehicle Credit: NASA In the field of aerodynamics, hypersonics is generally associated with flight through an atmosphere at speeds in excess of Mach 5, i.e. five times the local speed of sound. NASA, and its predecessor the National Advisory Committee for Aeronautics (NACA), have been involved in the study of hypersonic flight since the […]