Hangar 9 Twin Otter ARF Assembly Manual page 10

Step 2
Locate the large 4-way servo arm. Use sidecutters
to remove three of the arms, leaving one long arm.
Use your radio to center the servo and install the arm
using a #1 Phillips screwdriver.
Step 3
Prepare a second servo for the right-hand aileron with
the arm facing the opposite direction.
10
Step 4
Use a 5/64-inch drill bit in a pin vise to enlarge the
outer hole in each servo arm.
Step 5
Remove the hatch from the wing and position the
servo against the inside surface so that it is equally
spaced in the long direction of the hatch. There will be
approximately a 3/16 inch gap at each end.
Step 6
Align the servo arm with the top edge of the hatch and
mark the mounting lug locations with a pencil.
Step 7
Mix a small amount of 30-minute epoxy and glue the
10 x 11 x 20mm servo mounting blocks in place.
Twin Otter ARF Assembly Manual