Fwd: In need of advice on split-ring mount
Bill Marriott (btk@ix.netcom.com)
Wed, 3 May 1995 22:34:00 -0700
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>Hi. I am relatively inexperienced in telescope construction, but
>am in the process of designing a split-ring mount and truss assembly
>for a f/6.7 12.25" newtonian . Can anyone enlighten me on how much
>beam clearance is normally allocated at the upper cylinder?
>Would a 13" inner diameter be sufficient for a 12.25" mirror? Would
>such a calculation be based on the size of the diagonal? Thanks in
>advance.
Dan Feldkhun
>P.S. Any other advice, or direction towards other sources on
>split-ring
mount construction would be greatly appreciated.
Dan:
With out looking into the calculations, I'm building a f4.8 10", and am
using a 29" OD, 27 ID Ring, and I wish it was bigger... ie 36".
See my post on split-ring mount coming up shortly.
Bill Marriott
btk@ix.netcom.com