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Task: Finished seat back braces, drilled
replacement control column mount, and match drilled F-704K.
several odds and ends to finish up this evening. It seems
we are able to get a lot accomplished during our longer build
sessions on the weekends but every once in a while need to
spend a good day or two with small tasks. Today it was finishing
the seat back braces. I drilled them to the hinges already
but needed to finish by cutting lightening holes and making
some cuts on the ends.
for the blurry picture. I first marked and cut the edges of
the seat braces. This is presumably to reduce weight and allow
more freedom of movement. Notice the pilot holes for the 4
Next we ventured over to the drill press and
brought out the most dangerous tool in my toolbox, the fly-cutter.
Frankly the tool scares me. It is a weight that spins around
at several hundred RPM an inch away from center on the drill
press. This causes the press to move around quite a bit an
is very unstable. I typically enlint some help when using
the fly-cutter to make sure everything is held in place well.
The next task was to replace the left control
column mount. When we were making the relief for the seat
ribs, I didn't realize the air saw blade was hitting the mount/bearing.
I was not willing to keep the mount if its integrity was at
all compromised. So we measured, marked, and match-drilled
the new mount.
drilled, we marked the relief area to save weight. The band
saw here in the shop is currently lacking a blade, so we'll
have to wait untill the new one arrives before cutting this
Lastly we match-drilled the F-704K on the spar reinforcement.
These serve as cosmetic caps to cover the two halves of the
spar. Down the road we will probably install map lights in