indigoonlatigo(at)msn.com
Guest
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 Posted: Thu May 04, 2006 7:37 am Post subject: Dents in HS Skin(wet shims) |
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Again, everybody seems to have experienced this.
When I noticed this I went back and re-did it a different way.
The problem seems to stem from the fact that the skin bend radius is
different from the radius of the nose ribs. We think the correct airfoil is
the rib shape plus the thickness of the skin.
I wrote something a while ago about doing something called wet shimming.
Those nose rib flanges can easily get slightly(Slightly) out of shape when
pounding on them with the rivet gun. Also the skin bend and the rib flanges
space aren't as tight toward the L.E..
I did a two step process of again using the Anchor Tite epoxy bond and
bonded only these nose rib flanges in and let it cure while most of the
spars and ribs were in place to hold the skin in the correct airfoil shape.
After cure, cleaned the holes, made sure the rivet lengths were still
correct, removed the internal structures to gain access and then riveted the
nose ribs while the structure is vertical and alternated each rivet set from
top to bottom going from L.E. to T.E.
The result was a big improvement from my first attempt, although still a
slight difference in contour.
You would be surprised how the H.S. skin sprung back when I removed the
first attempts rivet. I rebuilt the Vertical again using this technique
with all new parts when the service bulletin came out. That was the excuse
I needed. Be considerate of weight...use sparingly.
Just an anal kind of guy.
The other suggestions will work fine too.
John G.
| Quote: | From: "Marc and Kathy" <marchudson(at)comcast.net>
Reply-To: rv10-list(at)matronics.com
To: <rv10-list(at)matronics.com>
Subject: Dents in HS Skin
Date: Thu, 4 May 2006 06:46:35 -0600
Was wondering if anyone else had this problem and if there are suggestions
on how to fix it?
The nose ribs of the horizontal stab pull the skins in slightly and produce
a dent in the skins on the rivet line.
This is only happening on the top side of the skins not the bottom and only
to the nose ribs.
I have measured the worst looking one and it pulls the skin inward about
1/8
of an inch. I'm confident that
this is cosmetic only however it is still upsetting.
Will I be able to fill this in with Superfill before painting?
Has anyone else seen this?
I could e-mail pictures if needed.
Thanks for the help.
Marc Hudson
marcandkathy.com
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