(9-18 step 7):
Once home from work I wanted to concentrate on attaching the trim
tabs to the elevators. There seems to be some confusion as to
whether the hinges supplied from Vans are anodized or not. Vans
says they are, but the part makings seemed to indicate they
aren't. So, I decided to use my alodine pen on the surfaces of
them that will attach to the rear spar of the elevator (the remaining
surfaces will be painted later). So, while this stuff was drying
I decided to sit down with a printout of the hinge spec and try and
find out once and for all. Well, in the hinge spec I did come
across the statement that "designation for anodizing and length shall
not be included in the marking"... that explains why the part markings
don't indicate its anodized!
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I
wanted to use the squeezer when attaching the hinges. In order to
do that I needed a method for reaching around behind the eye loop of
the hinge. This is an idea I originally saw on Mike Howe's
site. I cut a small piece of steel off of our angle we've been
using for trailing edges, deburred it and taped it to the yoke.
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Here
you can see the need for the modification. Care must be taken to
not hit the loops as they bend pretty easy. Also, the plans call
for AD3-4 rivets here. These gauged about a 1/4 size to
long. Normally this isn't a problem, but with the squeezer mod
being taped in place it was able to move when put under force so I
wound up folding over 3 or 4 rivets. The solution was to use
AD3-3.5 rivets (about a 1/4 size too short) and I also epoxied the mod
on the yoke (it was popped off later with a pair of pliers).
Worked great!
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(9-18 step 8):
After the hinges were attached the trim tabs were connected to
the elevators with their pins. I began bending the pin on one of
them… they don't bend that easy. Well, it's getting kind
of late so I'll finish this up tomorrow…
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