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The next job was the installation of the servos and radio gear. This also
solved a mystery for me as I had a bag of small plastic black things (a
bit like nuts) and had no idea what they were for. This was soon solved
my my realization that when mountin the servos the screws have to screw
through the fames into something. The small black nut like objects were
the thing that the screws went into. Mounting the servos actually proved
to be quite a fiddly process as some of the black plastic nuts are difficult
to hold in place whilt you screw the servos into place. In retrospect it
may have been easier to mount the servos before putting the frames together.
The servo rod linkages are perfect as specified in the manual and everything
lined up correctly. I used the second hole out from center for the aileron
and elevator servos. The collective needed to be on the furthest hiole
from center to get the throws required to get +/- 10 degrees of pitch.
On the tail rotor I servo I went for the standard 10-15mm from center,
which gives full throw on the tail pitch slider.
The X400 doesn't have a gyro platform behind the main mast (good, it's
a danger spot for gyros anyway). So the receiver and gyro go in the bottom
of the frames next to one another. The ESC I side mounted up close to the
motor and away from the receiver. As I am intending running 4S or more
with the X400 I also installed an external bec under the motor which can
be seen in the pictures. |
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