RIVET SPACING?

[EDMO 1078]

I HAVE AC43-13:

My problem is - I really cant understand how to figure rivet spacing.  I see the spacing for double-rows for repairs, but I am doing a single-row of blind rivets.  The figures look like too many rivets for the material.

I am going to rivet .025 aluminum skins to my aileron ribs, and to the trailing edge with 1/8 blind rivets -

What is the spacing?

I know that we are experimental, and can do whatever we want to, but I would like to get this right according to some sort of approved method.

Has anyone got some understanding of what the "standard spacing" is, or how it is determined?

EDMO

Edited 8 Jan 2014 by Ed In Missouri