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Thursday, July 19, 2012

Ch. 5 - Fuselage sides RH - Part 2


Installing the top longeron (1.8 hrs)

First off, a little update on the right sidewall surface finish.
The little epoxy bubble that kept appearing below the peel-ply sheet, but above the fiberglass, had a chance to dry out and the surface turned out a bit lumpy indeed.




Epoxy bubbles under the peel-ply sheet

Dried epoxy bubbles on top of the fiberglass (peel-ply removed)

Good thing that they sanded off easily, because there were quite a few of them.

Initial sanding of bubbles in the front section


Initial sanding of bubbles in the rear section

While the plans call for floxing the longeron while the fiberglass is still wet, I decided to use peel-ply instead, and postpone the longeron installation. I did this because I wanted to have the opportunity to ensure the longeron was perfectly straight, and lined up with the top of the foam. I accomplished this by backing it up to a straight-edge, and nailing it to the cured fiberglass. I then removed the longeron confident that I could return it to its proper position later.

Setting longeron's final position using nails and straight edge

I flipped the longeron over, and applied wet-flox to it.

Longeron with flox ready to go back


I then reinstalled the longeron with nails, put weight on it, and left it to cure. 

Longeron being weighed down



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