Re: Ariane Failure

[Steve O'Neill <oneils@gbr.msd.ray.com>]

John Roth wrote:
> 
> "Steve O'Neill" <oneils@gbr.msd.ray.com> wrote in message
> > And here was another of the fatal system design flaws that should never
> > have been made... it seems that this 'other channel' was an *identical*
> > system which, of course, reacted in the same manner.  Leaving the poor
> > flight control computer with no valid data.  Ooops!
> 
> Not exactly. The assumption was that failures would be hardware,
> so dual coding the software wasn't an objective.

Well, no matter where you assume the failures will or will not occur you
should never design a dual-redundant system where both strings are
identical.

Steve