Final Wing Hanging and Wing Rigging
The day I was finally
ready to permanently hang the
wings and do the wing rigging was very exciting.
was a big step
that really made the project look like an airplane. I made
sure everything was ready for this final install. Here's how
are a couple of things I would caution
you about first. Have
everything on the inside of the plane?
Once the wings are on, getting around takes a
lot longer. You can
no longer just scoot around the nose
and be on the other side of the fuselage.
Now you will have to walk all the way around
the wings. Have you
already installed the gear? The
plane is a lot heavier and harder to jack
up with the wings installed. If
haven’t already seen my preferred
check it out before you make any final decisions.
Permanently Hang the
The final time is much
like the initial fitting. You
will still need help with the wings while
you are inside the cockpit fitting the bolts.
Don’t forget to slip the F-816 pushrods into
the wings before you do the
final install. I greased up the main spars
to allow them to
slip easily into the center spar section.
When you are sliding them in, start with the
wing spar above the bottom
fuselage skin so the lower edge of the spar doesn’t scrape the inside
skin as it is inserted.
I used the same tapered
bolts to initially align the holes
in the main spars. This
time though, I
used the close tolerance bolts called for in the plans to push the
bolts back out. Use
a little forethought
on the direction you start with the tapered bolts.
Remember you will be pushing them out with
the real bolts and leaving the real bolts installed.
So insert the tapered bolts from the opposite
side than you want the final bolts inserted.
Then when you push the tapered bolts out, the
final bolts are inserted
I installed the four main
bolts on each wing while I had
help. The rest I
could do on my
own. Before I
tightened any bolts or
nuts, I started all the bolts, including the one in the rear spar. After everything was
started, I tightened the
smaller bolts first, then finished up the four large bolts on each wing. Since I had used grease to
everything together, there was grease on the threads of the main bolts. I had to remove it since
specifications are for unlubricated threads.
Lastly I torqued the rear spar bolt.
started the wing rigging
from the center of the plane and
worked out. I set
the stick to center by
holding a level against its side.
it in place with tape and clamps.
I used the bellcrank jig
to hold the WD-421 bellcranks in
the neutral position. Then
the ends of the F-816 pushrods until the bolts slipped through the
the bellcrank and tightened the jam nuts to lock the length of the
pushrod. Make sure
you have about the
same amount of threads showing on both ends of the pushrods. You don’t want more than
half the threads
showing on either side.
I slipped the F-818
pushrods into the wings, and hung
the ailerons. It
took a little while to
get the spacers and washers just right for the ailerons. Then I clamped the aileron
in the trail
position by aligning the tooling holes on the wing tip and aileron. I adjusted the ends of the
F-818 pushrod the
same way I did the F-816.
tighten all the
aileron nuts yet—I had to remove the
ailerons to attach the stops. After
everything was connected, I unclamped the stick and ailerons and
everything for travel. Then
where the stops would go. The
for up travel of 25-32° and down of 15-17°. I made the two small stops
out of aluminum
left over from the tank attachment brackets, and clamped them into a
that gave me a little less than 32° of up travel. Then
I drilled and clecoed
them onto the W-413
inboard aileron mounting
the stops in place, I checked the travel of the
ailerons. With the
aileron against the
stop on one side, I checked the down travel of the other aileron. Since I had drilled the
stop at slightly less
could trim off a little metal to fine-tune
the stop. I did
this until I got to 17°
down and 32°
up for both ailerons. If
you reach one limit before the other, you
can make adjustments to the
length of the F-818 pushrods.
If you haven’t already drilled and attached the fiberglass wingtips, now is a good time to do it.
from Wing Rigging
to Final Assembly
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