Re: Boeing's Sonic Cruiser - a Boeing stealth aircraft

Date:         16 May 2001 17:45:34 
From:         matt weber <mattheww@Qwest.net>
References:   1 2 3 4
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At 04:40 PM 4/19/01 +0000, you wrote:
>In article <airliners.2001.142@ditka.Chicago.COM>,
>Malcolm Weir  <malc@gelt.org> wrote:
> >Errr... actually, you need 1960's generation of engines for supercruise!
> >
> >Rolls-Royce/SNECMA Olympus 593, anyone?
>
>Concorde accelerates through M1 with the afterburners lit.  Supercruise
>involves leaving the afterburners off.
>
>-- don
Actually the burners go off at about M1.7.  That's apparently the point at
which drag starts to drop off, and the afterburners are no longer
needed.  It is very noticeable on the aircraft, not so much because of the
change in acceleration as change in cabin noise level  and vibration. The
pumps that feed the afterburners are probably the largest single source of
noise on board.

Matt Weber