15 SEP 07 - Part II - Completed Front HS Spar,
Match Drilled Left HS Skin - 6 Hours
I couldn't stand all this work without anything getting done on my airplane! So
I dove right in where I left off. I drilled/filed a bend relief hole in the front
spars, and then bent them to match the 6 degree angle of the front spar reinforcements.
Then I dimpled the front spar and countersunk the HS-810/814-1. I need to start
taking more pictures, but I was really flying now.
I notched the aft end of the HS-404 ribs, and taking
Brad Oliver's advice
, I left the notches a little undersized as I can always
take more off later.
I fluted HS 706, HS 707, and HS-708.
Then I marked and drilled the HS-405 ribs. Again taking
Brad's excellent advice
, I drilled the holes where HS-405 attaches to the
front spar and HS-404 a little closer together than what the plans call for to avoid
edge distance problems on HS-404.
Then you cleco together one side of the HS.
What a mess I've made!
I drilled out the holes where the ribs attach to the spars to #30 (with the exception
of HS-708 - it gets drilled #21 for pop-rivets).
The skins get put on next, and HS-404 and HS-405 get marked, fluted, and clamped
in place to await drilling (they do not come pre-drilled).
Here you can see HS-404 and HS-405 in place. HS-404 has been drilled. You have to
flute both of the ribs, mark a centerline on each, then clamp in place and drill
with the centerline showing through the holes in the skins. Sounds complicated,
but it was pretty straightforward. Once HS-404 is drilled, you then drill the inboard
portion of the front spar, which also does not come pre-drilled. Starting to look
like airplane parts! Can't wait to get these suckers deburred and primed so I can
pound some rivets.
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