[amsat-bb] Circular Polarization with Two Yagis (Spacing)

Hi,

I'm sure this has been covered, I just can't find some detail.

I'd like to consider taking a pair of say 3, 5, or even 11 element 2M yagi's (off the shelf) and put them on a boom on either side of a rotor, with nonconductive cross support boom, rotating the boom's to offset the elements 90 degrees.

Question I have, what would the spacing be between the two yagi's ?

Jerry has done this with success on 2 meters:

http://www.n0jy.org/images/IMG_20120623_215906.jpg

It would be great to refine his good work with the spacing for the 2 booms.

(Then I may compare with putting all the elements on one boom)

I like the collaborative nature of the discussion here.