Re: Boeing and Dreamliner

["Robert I. Eachus" <rieachus@attbi.com>]

Hyman Rosen wrote:

> While people here are focussed on the fact that the trajectory
> specs were not made part of the specs of the Ariane 5 SRI, the
> actual problem was that the Ariane 4 SRI programmers did not
> indicate that the trajectory specs for the Ariane 4 actually
> impacted the implementation of the SRI code.

Were you involved in the actual decision?  Do you know something that we 
don't?

I find it hard to keep from laughing at someone documenting this as a 
"limitation" of the Ariane 4 code:  "Caution moving Ariane 4 more than 3 
  kilometers during gyroscope alignment may have serious consequences."

The details were all well documented.  Including the Ariane 4 
REQUIREMENT for the alignment software to run for 40 seconds after 
launch, and why it was required.  This requirement did not apply to the 
Ariane 5, and anyone looking at the Ariane 4 documentation would see 
potential serious consequences associated with not fixing this requirements.