AviPro Aicraft, Ltd. Bearhawk N33RB, Руководство по помощи строителя

Страница: 23 / 28

23
pencil line across the fitting. Clamp it in position
with the clamp over the outside hole, make sure it
is square, and drill the second hole in. Put a bolt in
that hole and put the strut back up on the airplane.
Clamp the fitting in place so it can’t pivot
on the bolt. Using a short, very sharp pencil, so you
can reach between the wing and the strut, carefully
trace the outline of the fitting on the strut.
Remove the strut, verify that the pencil
lines indicate nothing has moved, and drill the hole
at the other end of the fitting through just one side
of the strut. Put a bolt through that hole, snug it
down and put it up on the airplane one more time to
check that everything is right before drilling the
rest of the holes.
If everything is right, you now have a strut
that has both fittings bolted to it with two bolts.
Repeat this process on both sides of the airplane
continually checking and rechecking the dihedral.
Once both struts have the fittings secured with two
bolts, go ahead and drill the rest of the holes
THROUGH ONE SIDE OF THE STRUTS ONLY.
Before taking everything apart, make iden-
tifying marks on both the fittings and the struts so
you can easily determine which fitting goes with
which strut and what direction they were facing
when they were drilled. That’s just good insurance.
Drill the Rest of the Holes
Reach inside the struts with 320 grit paper
and knock down any burrs from the drilling opera-
tion.
Slide the fittings inside the struts and index
them in position with a couple of bolts (the bolts
can’t go all the way through the strut because there
are no holes on the other side yet). Using the
biggest camps you own, clamp down on the middle
of the fitting between the two outboard holes. Make
the clamps super tight because we’re trying to pull
the strut together forcefully enough that the flats
inside the strut lay flat on the fittings assuring that
everything is square.
Drill completely through the strut in the the
open holes, put bolts in those holes and through the
struts. Put nuts on them and tighten them up, then
drill the other holes.
Once all the holes are drilled, clean out the
inside with 320 and Scotchbrite and lightly cham-
ber the outside edges of the drilled holes by
twirling a large diameter bit in the holes with your
fingers. You want to just barely break the edges.
Hey, guess what? You’re ready to bolt them
together permanently. Congratulations on a job
well done! Your wings are now ready to be attached
permanently, any time you choose.
Now it ’ s starting to look like an airplane, isn ’ t it!