[amsat-bb] Re: Phase 4 versus Eagle

Edward Cole kl7uw at acsalaska.net
Sat Dec 15 10:52:18 PST 2007


And at the risk of repeating myself:  The people checking off the 
list should have someone checking their work.  In other words do not 
trust one individual to be failure-proof.  In previous work environs 
I had at least two other individuals checking over my work to capture 
errors and oversights!

With a good checkoff procedure/list, thorough project plan, and 
enough folks to double or triple check (esp. critical steps) there 
should be a high confidence in things going right.  ***in a perfect world***

73 Ed - KL7UW

At 08:15 AM 12/15/2007, Joe wrote:
>I'll  agree with this completely.
>While we are NO AMSAT,  we here at Near Space Sciences, (one of the
>balloon groups) have in the heat of the launch excitement have just
>plain forgot to turn something "ON"
>Without a formal checklist,  where everything must be checked off the
>list before liftoff, or lift off doesn't happen,  something is bound to
>be missed.  it happens on our simple payloads,  i can not even imagine
>the complexity of a real AMSAT  type of bird!
>Robert McGwier wrote:
> >Yet again, a statement based on no knowledge of the real situation.
> >MOST space failures are caused by exactly this kind of thing.  A wrench
> >left behind and falling and puncturing a tank.  Incomplete testing of
> >this or that and a SUPPOSITION that it was "Okay".  Satellites not
> >bolted down when everyone assumed it was and a $100,000,000 satellite
> >falls to the floor.  These space things are extremely complex and if
> >every system had to be tested to perfection, none could afford them.
> >The goal of a good trained space/spacecraft engineer is to design robust
> >systems that have the really supercritical things testable and the rest,
> >well, the rules for that are in the adjoining testing manual (the local
> >religious book, for prayer).
> >
> >Bob
> >
> >
> >
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Ed - KL7UW
  BP40IQ   50-MHz - 10-GHz   www.kl7uw.com
144-EME: FT-847, mgf-1801, 4x-xpol-20, 185w
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