Re: [ATM] ground ring diameter vs. mirror diameter

[Mike Lockwood <melockwo@uiuc.edu>]

Hi,

John Sherman wrote:
> Yes, a beautiful scope. A 1.3 ratio is good for a minimalist scope. But Dave
> said he's enlarging his mirror box to put the truss mounts inside. That is
> also the way mine is constructed. It results in a larger ground ring. Having
> an ultralight top end results in a smaller ground ring. As long as we all
> abandon the old-fashioned way of doing it, itz all good!

For the maximum diameter of support of a rocker box, the support 
points should be at the corners.  For a square rocker box, this mean 
that the ground ring diameter will be square root of two (~1.41) times 
the rocker box width/length.

> Oh, and since Mike NEVER searches the archives <chkl><chkl> I'll post this
> link yet again....
> www.johnspics.com/hi/flexiblerocker.jpg  The rocker has been modified for a
> few reasons. It now has skateboard wheels instead of Teflon pads, etc, like
> I described before...

Aha.  I've never seen that photo.  I was too busy making mirrors to 
search for it.  :)

	Mike L.

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