Re: Air France Concorde crashes after departing Paris CDG

Date:         19 Apr 2001 16:40:30 
From:         FilipPC.DeVos@rug.ac.be (Filip De Vos)
Organization: University of Ghent, Belgium
References:   1 2
Followups:    1 2
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Pete Finlay (Pete@zzzmeads.demon.co.uk) wrote:
: In article <airliners.2001.112@ditka.Chicago.COM>, Jeremy Harris [RU-UK]
: <jgh@uk.sun.com> writes
: >In article <airliners.2001.78@ditka.chicago.com>,
: >       FilipPC.DeVos@rug.ac.be (Filip De Vos) writes:
: >> Part of that drag is the rudder, deflected to compensate for the
: >> assymetric thrust. So my question is, is it possible to make a climbing
: >> turn at a lower speed than 275kt? (turning towards the dead engines)
: >
: >Uh, to first order, planes don't turn thanks to the rudder, but thanks
: >to having been banked.
: >
: >- Jeremy

: Jeremy, I don't think Philip was stating that the pilots put rudder in
: so they could turn. When you are assymetric, you *need* rudder to fly
: straight.

Indeed. And this causes drag, which which Concorde could not overcome. So
I am asking whether it is possible for the pilots to use slightly less
rudder than necessary to counter the assymetric thrust, and accepting a
turn (in the direction of the dead engines), to experience less
rudder-induced drag, and hopefully climb or accelerate.

--
"Who needs credibility around  |    Filip De Vos
 here?" -- T. L. Elifritz      |    FilipPC.DeVos@rug.ac.be