control horns on the elevator and rudder. At these locations
drill 5/64" [2mm] holes through the elevator and rudder for
mounting the control horns with 2mm x 14mm Phillips head
screws. Mount the control horns using the nylon back plates
on the other side of the control surfaces.
INSTALL THE RADIO GEAR
Elevator Arm Throttle Arm Rudder/Steering Arm
❍
1. You must modify 3 servo arms to be used in this
section. Starting with the 4 armed servo arms supplied with
your radio system, modify them exactly as shown in the
above illustration. Enlarge the holes in the locations shown
with a Hobbico Servo Horn Drill (or a #48 or 5/64" [2mm]
drill bit).
Note: You may wish to trim the excess material from the arms
as shown in the illustration and the following photographs.
❍
2. Place the grommets and brass eyelets on the three
servos using the diagram above and your radio system
instructions as a guide. Place the servos in the servo tray
in the orientation shown in the following photograph.
❍
3. With your servo arms aligned at 90-degrees to the
servos, position the servos so the holes in the servo arms,
the holes you enlarged, cross the elevator and rudder
pushrods. Carefully mark on the servo tray, the four
locations of each servo for the servo mounting screws. At
these locations drill 1/16" [1.6mm] holes through the servo
tray. Install the servo mounting screws and then remove
them, creating threads in the wood at all the locations. Add
a drop of thin CA to each hole and allow it to harden (it is
best to take the servos out of the tray while doing this to
avoid gluing the servos to the tray). Reposition the servos
and mount them to the tray with the screws. Note: Run your
servo lead wires forward as shown in the photos.
❍
4. With the servos mounted into place, carefully center
the rudder with the fin and the elevator with the stab. While
the control surfaces are centered, use a felt-tip pin to place
a mark on the pushrod wires at the location of the hole in
the elevator and rudder servo arms as shown in the above
photograph.
❍
5. Use pliers to make a 90° bend at the marks on the two
pushrods. Disconnecting the clevises from the elevator and
rudder control horns will make this easier to do. Remove the
servo arms from the servos and run the pushrod through
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