[net.space] Hypersonic == 5x speed of sound

FISCHER@RUTGERS.ARPA (07/03/84)

From:  Ron <FISCHER@RUTGERS.ARPA>

(ron)
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UI.MJM%CU20D@COLUMBIA-20.ARPA (07/03/84)

From:  Martin J Mahoney <UI.MJM%CU20D@COLUMBIA-20.ARPA>

In-Reply-To: Message from "Ron <FISCHER@RUTGERS.ARPA>" of Tue 3 Jul 84 12:42:06-EDT

Is there any reason the 5x was chosen? Was it chosen because it is a nice 
number or are there any aerodynamic reasons which makes travelling faster than 
Mach 5 different than travelling faster than Mach 1

Martin Mahoney
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