Re: [ATM] 15.5" Ultrathin project...

[Jarvis Krumbein <jkoptic@juno.com>]

Russ, David has been pushing the envelope of thin mirrors for several
years now.  They keep getting thinner.  Go back to the archives to see
what he's done.  He makes my own attempts with a 1" thick 20" f3 slumped
mirror look feeble.

Jarvis Krumbein

On Thu, 20 Oct 2005 21:07:45 -0400 "Russell Jocoy"
<russjocoy@hotmail.com> writes:
> 
>     Dave,   My God man what are you doing?? 3/16" glass is almost to 
> thin 
> for a window, let alone
>                a telescope mirror. If you are headlong into this 
> project ( 
> by your photos you are)
>                 SUPPORT is the utmost task at hand. How in the hell 
> are you 
> grinding this potatoe
>                  chip??? You can list photo's, information, and how 
> you can 
> make this happen.. but..
>                   If you have no SUPPORT mechanisim while grinding , 
> you are 
> bouncing on a
>                      Trampoline with each stroke .... Comprende'??   
> This is 
> really fun if you are for real..
>                                                  Russ Jocoy
> +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
> 
> 
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> 

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