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Old 08-02-2008 | 12:30 AM
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Rcpilot
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Default RE: Midwest Citabria - Build Thread

Frenzied

Wings construction:

Got all the W2 ribs in place with medium CA and also put in the shear webs and leading edge piece.


The kit is designed to have 2 dihedral braces made from 1/8" hard plywood. These braces go in front of the spars and behind the spars. Nothing in the middle of the spar. It's just an empty pocket with the braces in front and back. This is where I will need to drill the holes for my wing dowels. I don't like the idea of just drilling through a piece of 1/8" ply to hold my dowels, so I had to make an additional brace from 1/4" hard plywood. The spars are 3/8" wide, so the 1/4" brace will not fill the entire space (front to back) between the spars. I decided to glue my added brace to the front piece of 1/8" ply. When I drill my holes in the front of the wing for my dowels, I will go through the front piece of 1/8" ply and through the 1/4" ply. When the bit comes out the back of the 1/4" ply, I will stop. There will be a 1/8" void between the 1/4" ply and the rear dihedral brace. I plan to use Gorilla glue on the dowels, so this void in between the pieces of ply will allow the glue to expand a bit without blowing anything apart. That's the theory anyway.

I marked out where the 1/8" ply and 1/4" ply will need to be glued together. Then I applied the 15min epoxy to the spars and plywood. Clamped it all in place. Watching glue dry now.

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