Instruction manual

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 as a guide. Place the

servos in the servo tray in the orientation shown in the

following photographs.

❍ 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.

❍ 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 wire at the location of the hole in the

servo arm as shown in the above photograph.

❍ 5. Use pliers to make a 90-degree bend at the marks.

Disconnect the clevises from the elevator and rudder

control horns. Remove the servo arms from the servos and

run the pushrod through the hole in the servo arm from the

bottom of the arm. Place a nylon Faslink to each pushrod,

and then cut the wire with 1/16” [1.5mm] protruding from

the Faslinks. Reattach the clevises to the control horns.

Reinstall the elevator servo arm on the servo with the screw.

Use a hobby knife with a sharp blade and cut the steering

pushrod guide tube at the location shown in the above

photograph. Do not cut the steering pushrod at this time.