Re: [ATM] New 16" telescope design

["Alan Scott" <alanne1956@hotmail.com>]

Rod,
  Yep, I blew it.  The web page has been corrected, with a link to the 
manufacturer.  I am thinking of using the same composite material that 
Albert Highe used.  Excellent use of material.  The material is basically a 
thin skin of plywood on top of a light weight core (in this case, cardboard 
paper).

I need to think this over.  The current design for DS-3, which is a 12" 
scope, produces fabulous images.  I am basically trying to use this 12" 
design, but take it to a 16" scope.  Don't forget that I am going to use 
double sided sticky tape, that has a soft filler of about 1/8".    That way, 
the wood will NEVER come in direct or indirect contact with the glass.  The 
reason I chose ply is that is what I will have available.

  Yes - I will definately look at Albert's designs once again.  He does 
wonderful work.

alan


>From: "RodShea" <RodShea@comcast.net>
>To: "Alan Scott" <alanne1956@hotmail.com>,<atm@atmlist.net>
>Subject: Re: [ATM] New 16" telescope design
>Date: Sun, 20 Nov 2005 14:28:52 -0800
>
>Alan,
>
>Can you say more about the composite 1/2" plywood?   Do you know what it is 
>made of, and its mechanical properties?
>
>Also, I would echo Mark Holms thoughts on using Appleply or similar for the 
>cell arms.  Solid wood of the same species will be approx twice as stiff as 
>plywood parallel to the grain, since all of its fibers are in that 
>direction, not half of them.  Aluminum would be better yet, and can be 
>worked with woodworking power tools pretty easily.
>
>Rod  Shea
>
>
>----- Original Message ----- From: "Alan Scott" <alanne1956@hotmail.com>
>To: <atm@atmlist.net>
>Sent: Saturday, November 19, 2005 10:24 PM
>Subject: [ATM] New 16" telescope design
>
>
>>
>>I have just finished the designs for an ultralight 16".  I am interested 
>>in
>>thoughts on the scope, and especially opinions on going with composite 
>>1/2"
>>plywood, as opposed to 1/2" apple ply.  Theoretical weight for the plywood
>>only is 62 lbs, and the composite comes out around 51.
>>
>>Thanks,
>>
>>Alan Scott
>>
>>http://www.xmission.com/~alanne/DS4Main.html
>>
>>_________________________________________________________________
>>Don't just search. Find. Check out the new MSN Search!
>>http://search.msn.click-url.com/go/onm00200636ave/direct/01/
>>
>>
>
>
>--------------------------------------------------------------------------------
>
>
>>_______________________________________________
>>ATM mailing list http://www.atmlist.net/
>
>

_________________________________________________________________
Don’t just search. Find. Check out the new MSN Search! 
http://search.msn.click-url.com/go/onm00200636ave/direct/01/

_______________________________________________
ATM mailing list http://www.atmlist.net/