joy of preparing the wing ribs. There are 14 main wing ribs plus
many more for the leading edge ribs that need to be readied for
assembly. Standard stuff....fluting, deburring, more deburring,
and more deburring. This part of the project is tedious and BORING...but
it is really important and must be done right. I used mostly my
die grinder and bench grinder for the edges and holes, and some
flexible sandpaper for the notches that are all over the place.
here are the leading edge ribs....see all of the notches in the leading
edges? It takes forever the deburr them all. The fluting is also pretty
challenging on the larger ribs.
for something that is a little more fun. You need to make plans of
some sort on how you are going to run your wires out to the edges
of the wings for the landing light, strobes, and nav lights. I decided
on a safe place and drilled pilot holes with a hand drill. Then I
clamped the ribs (all 14 of them!!) in the drill press and opened
up the holes so that my conduit can fit. I plan to run the wires in
the conduit. It is flexible, cheap, light, and practically indestructable.
here I have opened up the hole. The alignment of the holes from rib-to-rib
isn't very critical since the conduit is very flexible, but it turned
out very nice and all of the holes are very much lined up as you sight
down the wing through the holes. You may be wondering where my pitot
line will go. I decided to build the right wing first so I don't have
to worry about pitot line placement until I get to the left wing.
some progress!!!! I was pumped to cleco the spars to the ribs and
take this picture. Progress has been slow but this was really cool
another picture! The 'wing' in this orientation is flying into the
wall to the left. You can see my conduit hole in the rib at the bottom.
you can see a close up of the conduit holes in the same relative location
on the ribs.
is a picture of the rear spar cleco'd in place. I have match drilled
the rib-to-rear-spar holes to final size.
here is the forward spar cleco'd on. I have opened op the rib-to-spar
holes to final size.
here is a picture of the outboard ribs cleco'd on temporarily to the
spar for match drilling. Cool! You may be wondering where the inboard
leading edge ribs are. Well they are part of the fuel tank which is
built separately (later) so the fitting isn't done at this stage.
Next up will be to prime the ribs and rivet the ribs to the spars!
I have riveted the main ribs to the forward spar. This is fairly easy
riveting, but you do need to use the gun (can't squeeze em). Its easier
with 2 people but one person can do it....kinda nervous with that
gun and bucking bar rattling around my expensive spar though!
you rivet the rear spar on. This is easy work because I could reach
all of these rivets with my pneumatic squeezer. Notice that I have
tape over one of the holes for each rib. You don't put rivets in here
yet because later on there will be an aileron gap fairing and flap
brace that spans the length of the wing....that will be riveted to
the assy here.
some progress! The ribs are riveted to the spars. In this pic this
is the right wing and it is flying into the wall. The ribs on the
left side of the picture are closer together because this is where
you will step on the wing to get into the cockpit! Next thing I will
do is mount this entire thing in the jig so I can fit the wing skins