Hangar 9 J-3 Piper Cub Instruction Manual page 11

Section 2: Installing the Aileron Servos
Step 8. Trial fit the servo into the aileron servo bay. You will
have to make sure the servo lead wire is not crimped. Note the
orientation of the servo and servo arm. The servo arm used to
control the aileron linkage is pointing to the wingtip. The servo
in the other wing half should be positioned so the servo arm
also points outward to the wing tip. Note also the servo is
mounted so the servo arm is positioned closer to the leading
edge of the wing.
Note: The supplied 4-40 threaded linkages are of a specified
length, so make sure the servos are orientated
correctly.
Step 9. With the servo in place, mark the location of the servo
screws, and then remove the servo.
Step10. Using a 1/16" drill bit, drill the servo screw locations
previously marked in Step 4. Once the pilot holes are drilled,
mount the servo using the screws provided in you radio system.
Step 11. Repeat the procedure for the other servo in the other
wing panel.
CONTINUED
11