English Wikipedia - The Free Encycl...
Download this dictionary
Hypersonic speed
In
aerodynamics
, a
hypersonic speed
is one that is highly
supersonic
. Since the 1970s, the term has generally been assumed to refer to speeds of
Mach
5 and above.
See more at Wikipedia.org...
© This article uses material from
Wikipedia
®
and is licensed under the
GNU Free Documentation License
and under the
Creative Commons Attribution-ShareAlike License