(17-3 step 8):
Today I worked on getting the remaining ribs in the leading edges
deburred and dimpled. Our leading edge ribs had more scrapes and
scratches as delivered from the factory than any other piece in the kit
so far. This was a pain, and took a while to get out.
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(17-2 step 6): In
order to speed up the process of removing scratches, especially those
up in the bend between the web and flange, I borrowed one of the hints
I read on the VansAirforce forums. This is just a little 1"
scotch-brite wheel in our drill press. This works very nicely and
allows you to keep 2 hands on your work... much more control.
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(Duckworks HID Landing Lights): Ok,
one more item to take care of on the Duckworks light kit before we
start priming parts. The mounting plates attach to the ribs with
2 screws on each side. The kit provides a template for locating
the screw holes. According to the instructions you cut this out
and glue it to a piece of cardboard. I think I may try and skip
that step.
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Instead
of mounting the template to a piece of cardboard I decided to cut out
the lightening hole, and also the area marked for the pressed
stiffener. This gave me plenty of reference for accurately
locating the template on the rib. Once in place, I used a sharpie
through the two screw holes to mark their location.
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Instead of marking all four ribs I marked one of the left
ones, and one of the right ones. I then drilled the screw holes,
and then the nutplate rivets holes using the normal clecoe and nutplate
procedure. Once all holes were drilled (undersize) in these two
ribs, I clamped them to their partnering ribs and final drilled the
holes to their final size through two ribs at once. Probably not
needed, but it ensures that both sets of holes for the same mounting
plate are identically positioned.
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After the holes were deburred, I dimpled the nutplate attachment holes. The screw holes don't get dimpled this time.
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