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sarg314(at)gmail.com
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 Posted: Fri Apr 17, 2009 9:51 pm Post subject: wing root bolt interference |
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I am bolting on the right wing on an RV-6A quick build for final assembly. The second NAS 3/8" close tolerance bolt out from the center on the top will hit hit a floor rib. I slipped a hardware store bolt in there and it has about 3/16" clearance between the forward edge of the floor rib and the aft surface of the steel splice plate. Am I supposed to install this bolt backwards or chop away the offending portion of the rib?
Even if I install the bolt with head aft instead of forward, it would be very difficult and probably do a lot of violence to the rib. The edge of the rib isn't squarely aligned with the bolt center, but it's pretty close.
The rib would have had to be installed about 1/2" further outboard to not be an issue. I could chop out the offending portion of the rib and then rivet in a patch later. What do they expect me to do here?
--
Tom Sargent
[quote][b]
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chris_hand(at)comcast.net
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| Posted: Fri Apr 17, 2009 11:20 pm Post subject: wing root bolt interference |
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Tom,
Mine wasn't a quick build but if I recall correctly, those ribs were notched top and bottom to allow room for the bolt. I don't have pictures with me that show the top bolts but if you look closely at the pictures on my web site, you can see where the notch at the bottom of the rib allowed room and I believe it was the same at the top of the spar:
http://rv6aproject.ckhand.com/panelAndElectrical/electrical/electricalPg7.htm
You can see in the pictures that I installed most of the bolts with nut on forward side (was easier for me to torque properly and I expect easier to check torque later) but where those ribs interfered, I went the other way around because I couldn't get the bolt in straight from the back. I think it was just the center two floor ribs I had that problem with.
Chris
RV-6A
[quote] ---
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ronburnett(at)charter.net
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| Posted: Sat Apr 18, 2009 7:03 am Post subject: wing root bolt interference |
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I remember having to drill a hole in the F699 bracket to allow access for a wrench and the bolt itself and I may have shortened that angle alum rib just in front of the spar to allow the bolt to fit and I may have even ground off part of the head of the bolt that faced the rib, but the plane is at the hangar so i can't check.
Ron Burnett
RV-6A finishing
H-4 Eggenfellner Subaru
St. Charles, MO
---- thomas sargent <sarg314(at)gmail.com> wrote:
=============
I am bolting on the right wing on an RV-6A quick build for final assembly.
The second NAS 3/8" close tolerance bolt out from the center on the top
will hit hit a floor rib. I slipped a hardware store bolt in there and it
has about 3/16" clearance between the forward edge of the floor rib and the
aft surface of the steel splice plate. Am I supposed to install this bolt
backwards or chop away the offending portion of the rib?
Even if I install the bolt with head aft instead of forward, it would be
very difficult and probably do a lot of violence to the rib. The edge of
the rib isn't squarely aligned with the bolt center, but it's pretty close.
The rib would have had to be installed about 1/2" further outboard to not be
an issue. I could chop out the offending portion of the rib and then rivet
in a patch later. What do they expect me to do here?
--
Tom Sargent
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sarg314(at)gmail.com
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| Posted: Sat Apr 25, 2009 6:50 am Post subject: wing root bolt interference |
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I'm replying to this just to close out this thread. The rib in
question is the F619R floor rib. In th quick builds of this era
(around 1999) the rib was in the wrong place. It was a mistake. Ken
at Van's told me to just cut away the part that was interfering.
--
Tom S., RV-6A.
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