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dfischer(at)iserv.net
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 Posted: Tue Oct 17, 2006 7:22 pm Post subject: Wing skin oil-canning |
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I just finished riveting on the top LH wing skins and I noticed one of the
"squares" was indented and would "oil can" when pushed from the inside.
The square is bounded by two ribs (the fourth and fifth from the tip), the
forward spar, and the "J"stringer. It is the fourth bay inboard from the
tip (RV-9). All other skin "squares" are tight/neutral. Any ideas (other
than drilling out every rivet in the skin) to address this issue? I was
thinking of drilling out the rivets around the square to allow the skin to
average out between three squares and re-rivet. Just wanted to see if
anyone else has run into this problem and worked out a solution. Other
than this the skin is perfect (well, pretty good at least). Thanks in
advance for the help!
Doug Fischer
Jenison, MI
RV-9A Wings
do not archive
[quote][b]
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sarg314(at)comcast.net
Guest
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| Posted: Tue Oct 17, 2006 7:42 pm Post subject: Wing skin oil-canning |
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Doug:
How about rivetting a stiffener to the underside of the skin right
across the middle of the square. A piece of that real light 0.025
"angle" that's used to stiffen the elevators and rudder would probably
do it. An extra line of 5 or 6 rivets won't be noticed.
Doug Fischer wrote:
| Quote: | I just finished riveting on the top LH wing skins and I noticed one of
the
"squares" was indented and would "oil can" when pushed from the inside.
The square is bounded by two ribs (the fourth and fifth from the tip),
the
forward spar, and the "J"stringer. It is the fourth bay inboard from the
tip (RV-9). All other skin "squares" are tight/neutral. Any ideas
(other
than drilling out every rivet in the skin) to address this issue? I was
thinking of drilling out the rivets around the square to allow the
skin to
average out between three squares and re-rivet. Just wanted to see if
anyone else has run into this problem and worked out a solution. Other
than this the skin is perfect (well, pretty good at least). Thanks in
advance for the help!
|
--
Tom Sargent
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Bob Collins
Joined: 11 Mar 2006
Posts: 470
Location: St. Paul, Minnesota
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| Posted: Tue Oct 17, 2006 8:10 pm Post subject: Wing skin oil-canning |
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Mine had oil canned a bit but once I had all the skins on it worked fine,''
Bob
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_________________
Bob Collins
St. Paul, Minn.
Letters from Flyover Country
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Vanremog(at)aol.com
Guest
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| Posted: Tue Oct 17, 2006 8:40 pm Post subject: Wing skin oil-canning |
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In a message dated 10/17/2006 8:23:51 P.M. Pacific Daylight Time, dfischer(at)iserv.net writes:
| Quote: | I just finished riveting on the top LH wing skins and I noticed one of the
"squares" was indented and would "oil can" when pushed from the inside.
The square is bounded by two ribs (the fourth and fifth from the tip), the
forward spar, and the "J"stringer. It is the fourth bay inboard from the
tip (RV-9). All other skin "squares" are tight/neutral. Any ideas (other
than drilling out every rivet in the skin) to address this issue? I was
thinking of drilling out the rivets around the square to allow the skin to
average out between three squares and re-rivet. Just wanted to see if
anyone else has run into this problem and worked out a solution. Other
than this the skin is perfect (well, pretty good at least). Thanks in
advance for the help!
|
===============================
IMO, this case screams out for a very light aluminum angle bonded to the underside of the skin using one of the 3M structural acrylic adhesive tapes others have discussed on this list in the past for attaching rudder and aileron stiffeners.
GV (RV-6A N1GV O-360-A1A, C/S, Flying 813hrs, Silicon Valley, CA)
[quote][b]
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dfischer(at)iserv.net
Guest
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| Posted: Wed Oct 18, 2006 4:37 am Post subject: Wing skin oil-canning |
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Van's had a similar answer although their suggestion was proseal as the
adhesive. I think I'll go that route. I have proseal left over from the
tanks. It's purely cosmetic but bugging me because it's just one square
out of all the rest. Thanks to all for the help!
Doug Fischer
Jenison, MI
9A Wings
| Quote: |
IMO, this case screams out for a very light aluminum angle bonded to the
underside of the skin using one of the 3M structural acrylic adhesive
tapes
others have discussed on this list in the past for attaching rudder and
aileron
stiffeners.
GV (RV-6A N1GV O-360-A1A, C/S, Flying 813hrs, Silicon Valley, CA)
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