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

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

So what ARE the best specs for a 4-point wiffletree mirror lower edge mount? 
  Ie. Two pivoting arms, each holding 2 edge support points.  What's the 
current,  very  latest  conclusion for this design?  (27 point [plop] 
triangles already done.)

The F4 primary is 32" diameter, 3" thick, 200 lbs,  modulus 6760.  Although 
that shouldn't affect the geometry.

This is my first post to what is a very talented, knowledgeable List.  
Returning to atm after a few years. This scope is my dream project and I?ll 
be seeking your latest, up to date views in a number of areas. I had 
designed and built a West-epoxied wood and aluminum break down 18? f4.3 
scope for a club, and then my personal portable aluminum Serrurier truss 20? 
F4.

1. At what angle from center/vertical should the 2 inner and 2 outer
support points be?

2. Should the pivot point of the support arms be centered between
these 2 points, to self-locate, or could there be a reason to design
it to be asymetrical?

3. Is there some definitive authoritative source setting out where
the 4 points should be? (not anecdotal stuff.) Since I am
trigonometry-challenged ? am just looking for the final angles.

The saw is ready to hit the metal, but want to avoid costly re-dos. So any
advice or references now would be really appreciated!

Bob

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