Flap Servo Installation - Hangar 9 Twin Otter ARF Assembly Manual

Step 20
Use a piece of low-tack tape and a felt-tipped pen to
label the aileron lead where it exits the wing root.
Step 21
Optional Setup: You may choose to use Z-bend
pliers to form a Z-bend in the pushrod in place of the
90-degree bend and snap keeper.
Step 22
Repeat steps 4 through 20 to install the servo in the
right-hand wing panel.
Twin Otter ARF Assembly Manual

Flap Servo Installation

Parts required
Wing panels (left and right)
Servos with hardware (2)
4-inch steel pushrods (2)
Clevises (2) Snap keepers (2)
Silicone keepers (2) Radio
10 x 11 x 20mm servo mounting blocks (4)
#2 x 3/8-inch woodscrews (8)
Tools Required
Ruler #1 Phillips screwdriver
Pin vise 5/64-inch drill bit
Pliers Sidecutters
Pencil Thin CA
30-minute epoxy Mixing sticks
Mixing cups
Note: the left-hand side installation is shown here.
Step 1
Prepare two flap servos by installing grommets and
bushings. Note that the bushings are installed from
the bottom of the mounting lugs.
Step 2
Locate the large 4-way servo arm. Use sidecutters
to remove three arms, leaving one long arm. Center
the servo using your radio then use a #1 Phillips
screwdriver to install the arm as shown.
Step 3
Use a 5/64-inch drill bit in a pin vise to enlarge the
second hole from the center, providing a servo arm
length of 9/32 inch (7mm).
13