[R-390] TUBES

Fri, 22 Feb 2002 12:16:29 -0500

The best yet!  The backup mirror that is still in storage was ground
PROPERLY.  Go figure.

Bob - N0DGN
----- Original Message -----
From: "Todd Bigelow - PS" <[email protected]>
To: "Ed Zeranski" <[email protected]>
Cc: "mikea" <[email protected]>; <[email protected]>
Sent: Friday, February 22, 2002 10:32 AM
Subject: Re: [R-390] TUBES

> I had heard that the calculation involved was one that did not take into
account
> just how the mirror would sit once it was outside of earth's gravity.
Someone
> should've made a scale model and taken it for a test ride in the
VomitComet...
>
> Boomer
>
> Ed Zeranski wrote:
>
> > >The Hubble bobble had nothing to do with miscalculation, though:
> > >it was caused by a tech at (IIRC) Perkin-Elmer putting a gauge
> > >stick in bass-ackwards, so that the mirror's focal length was
> > >off.
> >
> > Not a normal miss calq of numbers, you are right, but still a miscalq of
> > risk. Have you read the after event stuff by Richard Fineman?  The old
gnome
> > got dismissed as 'just a CALTECH physicist' when he said the board
wasn't
> > even asking the right questions. :^)
> >
> > Can't troubleshoot if you won't admit there is a problem.
>
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