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Twin Otter ARF Assembly Manual
Step 8
Remove the pushrod. Place a small control horn on
the rudder at the marked location and use a felt-tipped
pen to mark the mounting holes.
Step 9
Use a 1/16-inch drill bit in a pin vise to drill the
mounting holes for the control horn. Apply a drop of
thin CA to strengthen the wood and help retain the
screws. Allow the CA to cure without using accelerator.
Step 10
Use a #1 Phillips screwdriver to install the control horn
with two #2 x 1/2-inch screws.
Step 11
Repeat steps 7 through 10 to install the second
control horn on the left-hand side of the rudder. You
may need to use a hobby knife to remove the covering
from the cable exit hole in the fuselage.
Step 12
Remove the hatch from the right-hand side of the
rear fuselage and set it aside. Fold the 82-inch rudder
cable in half and use sidecutters to cut it into two 41
inch lengths. Insert each cable into the guide tubes
in the rear fuselage and feed them into the forward
fuselage area. Tape the cable ends to the fuselage so
they don’t get pulled inside the fuselage.
Step 13
Open the cabin doors in the left-hand side of the
fuselage and bring the cables out to prepare the end
connections. Slide a copper sleeve onto each of the
cables, then insert the cable ends through the loop of
a wire cable end and back through the sleeve.
