Re: ATM 3-Vane or 4-Vane Spiders

["Vegos" <astro@rvi.net>]

I'd like to field a different question, mabye less interesting, I don't
know?

Bruce Sayre's new design for the 22" scope uses 3 vane spiders.  This is the
first time I've seen 3 vanes on a scope so large.

Personally I prefer 3 vanes to 4 and have been trying to figure out 1.) If 3
vanes will suspend the large 2.6", 3.1" etc. secondary without vibration and
movement problems, 2.) Where could I find carbon fiber sheet for vane
construction?

I intend to use 3 carbon fiber vanes on a 14.5" scope just to test 1. above.
If constructed light and tight, it should fly, eh?

Any thoughts, ideas appreciated.


Steve Vegos
http://www.rvi.net/~yovw


>
> Paul,
>
> >DIFFRACTION IS NOT AN EDGE EFFECT
> >DIFFRACTION IS NOT AN EDGE EFFECT
> >DIFFRACTION IS NOT AN EDGE EFFECT
>
> I beg to differ. Page 55 in Star Testing Astronomical Telescopes:
> D