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From: beede@sctc.com (Mike Beede)
Newsgroups: sci.military
Subject: Re: Scramjets
Keywords: What are they
Message-ID: <1990Nov27.045102.3975@cbnews.att.com>
Date: 27 Nov 90 04:51:02 GMT
References: <1990Nov20.021943.27530@cbnews.att.com> <1990Nov21.222203.20991@cbnews.att.com>
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From: beede@sctc.com (Mike Beede)
deichman@cod.nosc.mil (Shane D. Deichman) writes:
>Ramjet -- A jet engine that propels aircraft by igniting fuel
>with air taken and compressed by the engine in a fashion that
>produces greater exhaust than intake velocity.  You have to 
>be travelling supersonically for the ramjet to work since it
>uses the airspeed and momentum of the plane to compress the
>intake air.

No need for supersonic speed -- a ramjet can work fine at much lower
speeds.  There is certainly a minimum speed for any given application,
though.



-- 
Mike Beede         Secure Computing Technology Corp
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