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From: "Marin David Condic" <dont.bother.mcondic.auntie.spam@[acm.org>
Newsgroups: comp.lang.ada
Subject: Re: Ariane Failure
Date: Thu, 11 Apr 2002 10:15:36 -0400
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"Ted Dennison" <dennison@telepath.com> wrote in message
news:4519e058.0204110547.36730467@posting.google.com...
>
> In fact, I can tell you firsthand that NASA's STGT sattelite/shuttle
> groundstation is designed exactly that way.
>
>
>From similar experience, engine controls for commercial and military jet
engines are typically dual redundant, identical systems. (I don't know what
the guys over at The Light Bulb did but that's at least the way Pratt built
them.) While I don't have first hand experience with them, I'd suspect that
lots of fly-by-wire flight controls are of similar design - and that's
pretty critical if it were to fail and turn the plain into a lawn-dart.
"Dissimilar" doesn't necessarily equate to "Better" - and even if it did, it
might just be the enemy of "Good Enough".

MDC
--
Marin David Condic
Senior Software Engineer
Pace Micro Technology Americas    www.pacemicro.com
Enabling the digital revolution
e-Mail:    marin.condic@pacemicro.com