[ATM] Best locations for 4-Pt. Wiffletree edge support PLS.

["Bob Drew" <gofast3@hotmail.com>]

Thx for the comments, Scott.  You mentioned seeing a pic of a commercial 
scope.
A few years ago I ran across very basic drawings online which included a 
proposal Torus was making  for some observatory or club. The scope looked 
like an eq.  yoke mounted RC.

It showed the pivoting bars at the 120 degree spacing, with the long 
pivoting arms equalizing  all the gaps.  I can?t call up the site,  but had 
printed a low res image way back.  Just scanned it & will send you a copy.

An Alt-Az has to be simpler than an equatorial. But I wonder what the math 
is behind the 45 degree pivoting arms with  22.5 degree and 67.5 degree 
placements of each support pair, and their effect on the mirror.

Plan is to use the scope primarily for visual, but will design enough room 
around the focus board for a field rotator, for some non-critical digital 
imaging fun with a 32?. It will be mechanically sound enough, but good  
photography will depend on whether I can install some effective tracking.

Bob

_________________________________________________________________
Experience Live Search from your PC or mobile device today. 
http://www.live.com/?mkt=en-ca

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