(10-5 step 1):
Today has turned out to be frustrating! Finally a chance to
devote some time to building and 30min into deburring I come upon
this… This is the lower portion of the F-1006 bulkhead. I
pretty much had the entire thing deburred when I noticed these cracks
in the lightening holes. These are definitely from the
manufacturing process, and there is one in the exact same spot on all 4
lightening holes... uugghh! A quick search of the Matronics
forums and apparently I'm not alone. It seems the solution ranges
from a replacement part from Van's to a suggestion from Van's to stop
drill the crack(s), and then open them up and smooth them similar to
the opening between two flanges. I'm not real keen on the fix-it
idea... especially since there are 4 cracks. Oh well, I'll check
for more and then move on to something else [sigh].
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| (10-7 steps 2 & 3): I
checked over a few more parts and didn't find any additional
cracks… hopefully I won't from here on! So, on to other
things. Next up, I finished match drilling the F-1047F stiffeners
(I did one the other night, and still had the second one left).
After that, I slid the F-1047G stiffener in and match drilled it.
This one goes right down the center of the bottom skin of the tailcone. |
(10-7 step 4):
Next I clecoed in the belcrank ribs and final drilled them to the
F-1007 frame (the whole tailcone assembly is upside down right
now). Interestingly the plans don't mention final drilling the
skins to the belcrank ribs. I made a quick check a few pages
ahead and didn't see any mention of it in later steps. I think
for now instead of spending a lot of time trying to figure it out I'll
just mark the holes as needing to be drilled and move on. If I
get to the teardown stage and they still haven't been drilled, I'll
handle it then.
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(10-6 step 2): I
wanted to get one of the side skins clecoed on, but I soon realized I
needed to use the skin to measure my bend in the longerons. So,
instead I located the longerons, cleaned them off and then marked them
for their bends (I'm going to bend them before cutting to length incase
I screw one up) The plans call for padding your bench vise with
aluminum prior to clamping in the longeron. I had been wanting to
reface the pads in the bench vise so I used this oportunity do do
something about it. I cut some of our scrap aluminum sheets to
fit the pads, duburred them and then scuffed one side. I then
cleaned both them and the bench vise pads with acetone. After
that I mixed up some JB Weld, spread it on the scuffed side of each of
the sheets, placed each sheet in the bench vise glueing it to the bench
vise pad, and then clamped the bench vise down on them. I'll let
this sit overnight and then I should have some nice smooth pads in my
bench vise. Welp, that's it for the day. Until tomorrow...
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