12/29/2013
Root Doubler and up drilling
I had rough cut the root doubler skin by making a mirror image of the right doubler (we are installing a wing walk on both right and left wings in hopes of finding an elegant method to modify the canopy for entry from both sides). Much of today was spent match drilling the root doubler and the up drilling the top of the left wing.
When I did the right wing root doubler I sort of puzzled through a method to Match drill the top skin by removing the root rib and drilling the edge of the second (top) skin from inside the wing . This worked pretty well on the right so I stuck to the plan on the second wing. The idea being that once enough holes are drill around the perimeter or edge of the skin that, when the wing is disassembled for deburring that the main field of the doubler can be match drilled by laying the skins on top of each other and skip the step drilling and just match drill the skins with a #31 drill bit (#31 because we are using flush rivets. I think I read recently in a note from Sonex that they advocate #32 bits for the leading edge, flush, rivets. The only way this would work is if a silver cleco was used with the #32 bit).
At the end of the day all the match drilling is complete and I finished deburring the leading edge skin and finished prepping and deburring the wing walk (root doubler).
Not much of a write up for today and just a few pics of the steps showing the process to fit the doubler.
