The JR 3421 sits down onto the ply mounts with the
servo case mounting tab fit into the machined slot in
the ply. The small triangular reinforcement tab will
contact the ply mount, setting the proper depth for the
servo.
Position the ply backer you made below the servo to
stabilize it. You may need to sand it slightly to allow
the servo to fully seat down on to the mounting plate.
When you are satisfied with the fit, remove the servo,
rough up the stab surface and CA the ply backer in
place.
Label the ends of your servo wires.
Midway between the two mounting bolt holes, cut a .5
inch diameter hole.
Run the servo wires to this hole and seat the servos
back into their mounts.
Add small blocks made from scrap wood fore and aft
of the servo to prevent lateral play.
Servo as first installed. Sand backer as needed to allow tab to sit down
fully on to mounting plate
Above: Small wooden blocks fore and aft capture servo.
Left: 1/16 inch cutter bit in Dremel tool routing servo wire hole
Construction Manual
Der Jet F9F-8 Cougar Page 7
