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Task: Started mounting the empennage
was huge! I mounted the horizontal stabilizer on the rear deck!
After ensuring the fuselage was completely level (center spar
section and rear-deck), I did a lot of measuring to find the
correct placement of the 4 holes that go through HS-714 and
the rear-deck/longerons. There are several places where edge
distance is very important, so I approached this task very carefully.
Once centered on the rear-deck, and loosely clamped in place,
I measured from each corner of the firewall to the aft outboard
corner of the horizontal stab. After getting it completely square
and centered, I firmly clamped it in place and started drilling.
It took quite a while to drill the 4 holes through HS-714 due
to the tight confines of the area.
the front four holes were drilled and reamed, I removed the
hs, deburred all parts, and drilled 4 1/8" pilot holes
through the rear spar vertical bars.
I then bolted
the hs back on and checked the angle of incidence. The design
is for 0 degrees which there is no easy way to measure for.
There are 4 tooling holes that can be used to measure and ensure
the 0 degree angle is met. I used a block with a #12 drill in
it and made sure all for holes were level with the bit. The
3/16" spacing that Van's calls out for ended up being perfect.
The HS has
been mounted permanently and now the VS is clamped and ready
to be mounted!