7
35% Extra 300 ARF Assembly Manual
Aileron Servos Installation
Required Parts
Wing panel
Ball link (4)
Control horns (4)
Aileron pushrod (4)
Required Parts (not included)
JR 8911HV with hardware (4) or similar digital servo
JR 1-1/4-inch servo arm (4)
JR heavy-duty servo extension, 24-inch (2)
JR MatchBox™ (2)
Required Tools and Adhesives
Pin vise
Thin CA
Phillips screwdriver: #1
Drill bit: 1/16-inch
Masking tape
Adhesive-backed hook and loop
3/32-inch ball driver
Scissors
Dental floss (string)
1. Prepare the aileron servos by installing the rubber
grommets and brass eyelets.
Hint
: Prepare all servos for the wing at this time.
2. Secure a 24-inch servo extension to the outboard
aileron servo lead using string or a commercially available
connector. This will prevent the extension from accidentally
disconnecting inside the wing.
3. Apply a piece of masking tape around the connector
and over the string.
4. A string has been installed in the wing to pull the
aileron servo extension through the wing. Tie or tape the
string to the end of the extension and pull the lead to the
wing root.
5. Mount the servo so the output shaft is facing toward
the trailing edge and mark the servo mounting lugs location.
6. Remove the servo. Using a pin vise, drill the servo
mounting screw locations.
7. In order to harden the servo mounting holes in
the bays, mount the servo screws, back them out and
apply some thin CA in the hole. Wait until CA is dry before