Model Tech Magic Formula 3D ARF Manual page 33

Connect your radio system and plug the rudder servo into the receiver. Center the rudder servo by double-checking that the
rudder trim lever on your transmitter is centered.
STEP 3: INSTALLING THE CONTROL HORNS AND CLEVISES
When satisfied with the alignment, mark and drill 5/64" diameter pilot holes through the rudder for the control horn mounting screws.
PRO TIP
Before installing the control horns in the next procedure, drip several drops of thin C/A into the pilot holes and allow
the C/A to fully cure. The C/A will harden the surrounding balsa, making the mounting area stronger.
Install the 90º bend in each 38-1/2" long pushrod wire into the holes
that you enlarged, using the nylon snap keepers provided. When
installing the snap keepers, make sure they "snap" firmly into place over
the pushrod wires.
The pushrod wires should be orientated on top of the servo arm,
as shown.
Carefully slide the threaded ends of the pushrod wires into the two
pushrod housings from inside the fuselage.
Install the servo horn onto your servo, making sure that it's centered,
as shown.
Install the servo horn retaining screw to secure the servo horn to
the servo.
Position one nylon control horn onto one side of the rudder. When
aligned properly, the centerline of the control horn should be 3" above
the bottom of the rudder and the clevis attachment holes should be
lined up over the hinge line. The base of the control horn should be
parallel to the rudder hinge line, too.
Install one control horn onto each side of the rudder, using four
M2 x 12mm machine screws, four M2 flat washers and four M2 hex
nuts. Be careful not to overtighten the nuts. You don't want to crush
the rudder.
IMPORTANT Apply a drop of thin C/A onto each hex nut to
prevent them from loosening during flight.
Using a pair of wire cutters, cut off the machine screws flush with the
hex nuts.
33 Continued On Next Page