Monday, July 24, 2017

Horizontal Stabilizer: Finishing

TIME: 3 HOURS

I put the AST hinges on the rear of the HS.  Surprisingly, almost all of the holes I drilled in the hinge using the hinge-drilling-template lined up exactly.  I found that I had to debur and sand the template just a little in order for it to for in snap in between the eyelets of the hinge.  Its a nice simple and low-cost way to drill holes in hinges.  There were a few holes which I couldn't insert the rivets into -- and that's probably do to a little primer inside the hole.

For instance, while I was placing rivets in every other hole..  there would just be a few random ones which wouldn't go in (at least not without some force).  I cleaned out the hole with a #30 and they slid right in.   Cleco every other hole, rivet,  remove cleco, rivet remaining holes.

The rear-skin splice was match-drilled with #53's.  These are really tiny holes, I think its for safety-wire in order to hold the hinge pins in place.  ERROR: When I match drilled the #53 holes into the rear-skin, the splice plate was upside down.  So I have two tiny holes in the skin which don't go all the way through [the splice plate].  Seems like this is my first permanent error.  Oops.



The counter-balance arm, lead weights and rear skins of the HS (i'm not sure what to call them) will be for tomorrow.

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