[Wing] Re: wing thing

[Jim Oke]

Hi Pat (and Tedd);

I finished my wings about six months ago (well, I'm at the 99% stage and
holding) so perhaps I can comment.

The flap brace can be left fairly late in the game but some preparation
early on will help. Try and predict where flap brace rivets in the aft spar
will fall and then leave the rib-to-rear spar rivets at these locations
undrilled until fitting the flap brace. You want to drill through the flap
brace, the rear spar, and a wing rib (aft flange) together to avoid extra
holes that are close together. I riveted the bottom skins on, then fitted
and riveted the flap brace and then riveted the top skin on (after my DABA
inspection.)

The plans are not that descriptive at the root end of the spar brace - where
it over laps the extra 1/8" doubler for the 5/16 spar bolt location. Check
the photos in the manual for an idea of how the cut out in this area goes.
Again, avoid drilling the doubler to aft spar holes in the flap brace area
too early. These should be drilled as one if at all possible. There is a
tendency to let the let the brace get "pushed down" in this area which will
cause a bend in the flap hinge line - use a straight edge on the lower
surface to avoid. This may mean that the top edge of the brace will require
some notches to be filed in it to clear the top row of rivets in the
doubler.

While on the subject of the aft spar, also look ahead to the aileron gap
seal installation. Rib-to-spar hole drilling is not a problem but the lower
rivets should be 426s vice 470s to have a smooth surface for the bottom of
the gap seal to rest on.

The stub rib needs some care in drilling the holes. I would suggest a few
3/32 flush rivets spaced in between the "final" 1/8 rivets to hold things in
place. (The plans show this for the outer bracket already). If you are able
to get along with clamps only in this area until drilling the inner aileron
bracket, that would be even better. Assuming you have the PP skins, then the
skins will determine the rib's location and the rib-to-spar rivets are less
of a factor. The "final" five 1/8 bracket-to-spar rivets will be ample
strength to hold the stub rib in place - no need for the "standard" four
rivets the other ribs require as well.

BTW, I drilled the outer bracket first and then used my completed ailerons
(with the hinge fittings installed on the brackets with the spacers and
other hardware) to set the location of the inner bracket. I don't think I
even bothered measuring anything spanwise. Vertical location does count
though so pay some attention to this to preserve the airfoil shape.

Try and get a look at a flying RV-6 to get a feel for the size and shape of
aileron pushrod hole in the spar. The plans are quite far off of this - a
kidney shaped hole angling up and in to almost the top spar  flange is
actually needed vice a square hole lower down per dwg 21. Cut early and
large and you will save a lot of tedious labour later on. Make it good and
big - that's why the big .063 doubter is there.

Glad to help with more questions, as you have them.

Jim Oke
Wpg
RV-3 (flies sometimes)
RV-6A (wiring & cowl stuff)








----- Original Message -----
From: "pat morency" <acwrench at yahoo.ca>
To: "Tedd McHenry" <tedd at vansairforce.org>
Cc: <wing at vansairforce.org>
Sent: Thursday, January 24, 2002 10:50 AM
Subject: [Wing] Re: wing thing


> Has anyone recently completed or in the process of
> completing the wings on an RV-6. I have some questions
> regarding the flap brace and when it is installed.
> Also does the stub rib have to be put in with 9 rivets
> ( 5 from the aileron bracket and 4 flush on the rear
> spar
> Thanks for the feed back.
> Pat Morency
> --- Tedd McHenry <tedd at vansairforce.org> wrote:
> > Pat:
> >
> > I can't think of anyone currently working on the
> > wings, off the top of my head.
> > I'm just about to start the wings.  But there are
> > lots of people on the list
> > who have completed -6 wings.  You might try sending
> > out a question to the list.
> > Just send an email to wing at vansairforce.org.  Your
> > questions are bound to spark
> > an interesting discussion.
> >
> > What sort of problems have you run into?  Whatever
> > they are, I'm sure I'll be
> > facing them soon, too.
> >
> > Tedd
> >
> > ---
> >
> > Tedd McHenry
> > Van's Air Force
> > Western Canada Wing
> > tedd at vansairforce.org
> > www.vansairforce.org
> >
> > On Tue, 22 Jan 2002, pat morency wrote:
> >
> > > Tedd,
> > > Do you know of anyone in your mailing list who is
> > now
> > > working on their wing set of an RV6. I seem to be
> > > running into a wall in a few areas.
> > > Thanks,
> > > Pat Morency/Calgary
> > >
> > >
> >
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