(9-7 step 1):
First order of business today was to cut the trailing edge wedges
to length. So the wedges were temporarily clecoed in place,
marked, removed, and then cut to length. I then deburred them,
reinstalled and checked the length. There are 2 trailing edges (2
elevators, so makes sense) and only one of the edges on one of them
needed a bit of sanding down for an ideal fit (you can see the finished
left elevator trailing edge clecoed in place in the pic below).
After the trailing edges it was time to final drill the closeout
tabs. The closeout tabs close off the triangular opening between
the fixed trailing edge and the movable trim tab portion of the
trailing edge. Here I'm putting the final hole in the left shear
clip & close out tabs.
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(9-7 step 2): Here
the elevator horns were clecoed and match drilled. This is
another place where the original holes took 3/32" clecoes, but they
were drilled out to #30. As you can probably guess, the elevator
horns are where the control cables will attach to the elevators.
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(9-7 step 3):
Next step was to final drill all the skin holes to the underlying
structure. A lot of holes, but a gratifying step since you know
disassembling and parts prep for final assembly isn't too far behind!
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(9-16 step 1):
Angela came out and wanted to lend a hand. Since I was
involved with final drilling the skins she moved ahead and deburred the
trim cable cover plates. After that she began laying out the trim
tab clamping blocks. The trim tabs are relatively small so the
ribs in them are basically foam blocks cut to shape. They will be
glued in place, and these clamping blocks will be used to 'clamp' the
trim tab skins around the foam ribs while they dry.
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(9-8 sep 1): Next
I got to tear everything down making sure that all the parts are
properly marked in order to reassemble them in the same place
later. After that I deburred the holes in the front spars, and
then dimpled the flange holes where the skin will lay.
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(9-16 step 2): Once
Angela finished up the clamping blocks she started fashioning the trim
tab & elevator trailing edge ribs. There's basically 5 small
foam blocks (2 ribs per block), and she cut the templates out of the
plans and glued them to the foam blocks with some spray adhesive.
Once in place it was a trip to the band saw to cut them out.
There are 6 trim tab ribs (3 for each side) and 4 elevator trailing
edge ribs (2 for each side). These will be prosealed in place
later.
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(9-16 step 4): After the ribs Angela started working specifically on the trim tabs. Here she's deburring the trim tab spar.
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(9-8 step 2): Next
on my agenda was to debur & dimple the root ribs. After that
it was the rear spars. The rear spars are where the trim tabs
will eventually attach so the inner 29 holes of the upper flange get
countersunk instead of dimpled to allow the trim tab hinge to be able
to sit flush on the inner surface of the flange. There's not
really enough material here for a countersink, but since the trim tab
hinge will be backing it up its ok.
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(9-17 step 3): Angela,
still hard at work on the trim tab duties, trimmed up the trim tab
horns. These are where the trim cables will attach to the trim
tabs.
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| (9-9 step 6 & 9-16 step 4): The
final thing we did for the night was to countersink the trailing edges
and Angela made up our break for bending the trim tab skins. More
progress, but still a lot to go... |
