RE: [ATM] Celestron 20" R-C telescope

["Thomas" <tomjan@ozemail.com.au>]

Yeah I noticed that too, on the face of it, IT sounds like a Serrurier
system, but the pics don't really look like one. Maybe they just wanted
the "big scope truss look" and a convenient CG as well?

Clear skies,
Thomas Janstrom
http://www.tjanstrom.com
http://www.norsewines.com.au
"Your nobody untill you've been ignored by your seventh cranio-facial
nerve."


-----Original Message-----
From: atm-bounces@atmlist.net [mailto:atm-bounces@atmlist.net] On Behalf
Of Stuart Hutchins
Sent: Wednesday, 5 May 2004 6:47 AM
To: ATM
Subject: Re: [ATM] Celestron 20" R-C telescope


After seeing the Anacortes pictures (link provided by Michael), this
does not look like a Serrurier structure.  Notice the Dec shaft appears
to go into the center of the lower truss, not the rings between the
upper and lower.  It simply looks like a box to connect the Dec shaft.

My, what a lot of metal way up in the air.

Stuart

----- Original Message ----- 
From: "Stuart Hutchins" <stuart452@earthlink.net>
To: <artbianconi@blast.net>; "ATM" <atm@atmlist.net>
Sent: Tuesday, May 04, 2004 2:17 PM
Subject: Re: [ATM] Celestron 20" R-C telescope


> Art,
>
> Serrurier truss?  Linear deflection at the cage equals linear 
> deflection
of
> the mirror.  Pointing angle then does not change as the structure 
> sags. http://astro.umsystem.edu/atm/ARCHIVES/JUL95/0114.html
> http://astro.umsystem.edu/atm/ARCHIVES/SEP03/msg00804.html
>
> Stuart


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