(21-2 step 4):
We plan to do some prosealing on the tanks tonight, but until
Angela could join me I spent time match drilling the counterbalance on
the second aileron. This is the first time I've used our
drill-stops. I can honestly say this is a perfect use for
them. Stainless likes a slower drill speed, and higher pressure
than aluminum. This means its easy for the bit to break through
and score the interior of the opposite side of the pipe. The
drill-stop makes this a non-issue... sweet!
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(18-5 step 6):
Angela made it out so time to proseal! We discussed it and
decided we're just going to concentrate on the left tank for now.
We want to validate our assembly strategy and make sure all goes well,
so we plan to finish & pressure test the left tank before
continuing any further on the right. Anyway... We mixed up 2-oz
of pookie, transferred it to a ziploc, wiped down all the mating
surfaces with acetone, and then started squeezing a bead on all the rib
rivet lines.
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There's
a lot more to do here than it looks… Our hands would cramp after
squeezing for a bit so we swapped out every so often.
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After
all the rib rivet lines and the J-stiffener rivet line were covered in
proseal, we began clecoing the ribs in place. As you can see, the
first thing we did was cleco the first 4 or 5 holes of the top rib
flanges to the skin. This is so we can install the J-stiffener
later. After it's in, we'll cleco the remainder of the top
flanges. Next though, we clecoed the entire bottom flange of each
of the ribs to the skin.
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(18-5 step 7): After
a few of the top rib flange clecoes, and all of the bottom rib flange
clecoes were installed, we positioned the J-stiffener into its slot in
the ribs, and then attached it to the skin with a few clecoes. We
then finished clecoing the top flange of all the ribs to the skin, and
then clecoed the remainder of the J-stiffener.
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(18-5 step 5): And
with the last bit of proseal I glued the fuel cap flange along with the
vent line clip (barely visible at the bottom of the fuel cap flange in
the picture) to the skin. We'll see about riveting all this stuff
tomorrow night.
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