[R-390] TUBES

Fri, 22 Feb 2002 13:09:22 -0500

As I understood it, t'was an error is the test setup to check the grinding.

this Link http://www.cs.unc.edu/~stotts/COMP204/notes/hubble.html links to 6
reports on the trouble.

Tom - KA2VAD

-----Original Message-----
From: [email protected] [mailto:[email protected]]
Sent: Friday, February 22, 2002 12:16 PM
To: [email protected]; Ed Zeranski
Cc: mikea; [email protected]
Subject: Re: [R-390] TUBES

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.
>
> _______________________________________________
> R-390 mailing list
> [email protected]
> http://mailman.qth.net/mailman/listinfo/r-390

_______________________________________________
R-390 mailing list
[email protected]
http://mailman.qth.net/mailman/listinfo/r-390