time to fabricate the wing tiedown assembly for the right wing.
Basically this is where you will tie the plane down on the ramp
in high wind. The assembly is attached to the wing spar for strength
with several bolts. Also, the aileron belcrank attached to this
assembly. You can think of this as the "hinge" so that
when you move the stick right, the pushrod can move the aileron.
Pretty cool stuff!
In this picture I have fabricated a spacer that wil tuck under the
tiedown assembly. I bought a bandsaw from Lowes which made the job
of cutting the aluminum angle MUCH easier. Invest in a bandsaw!
I used a round holecutter to make the large hole in the center.
Notice the dirty look of the aluminum. I had to clean this off with
alumiprep and scotchbrite pad to get it clean before priming.
is a pic of one of the spacers up close after priming. Notice there
are additional holes on the sides now, some of which are machine countersunk.
These will hold a nutplate in place that will be used to attach the
aileron belcrank that I mentioned earlier.
is a group photo of the spacers and the tiedown bracket itself. You
can see there is a gap under the bracket...that is where the spacers
will go to add strength.
is a picture of the assembly set in place with the nutplates attached
to the tiedown fixture. Remember the countersunk tiedown spacers underneath
the bracket? Well they were countersunk so that when these nutplates
are riveted in place, the "bottom" of the spacer cal lay
flush against the spar.
picture is worth a thousand words. This is what I am talking about.
These rivets that hold the nutplate need to be flush so the fixture
lays flat against the spar.
here it is all bolted to the spar. There are four bolts that hold
the tiedown assy to the spar, and four more hold the aileron belcrank
bracket to the spar.
is the other side of the spar. Here you can see the aileron belcrank
brackets bolted in place. These bolts go through the nutplates on
the other side of the spar. Notice the orange gunk on the nuts and
bolts. This is "locktite", it hardens after you torque the
nuts into place....its to remind you which nuts you have torqued and
which you have not...and if for some reason years down the road a
nut slips a bit this orange stuff is brittle and will crack so you
can visually see of any nuts have slipped. Good for annual inspections!