Model Tech Fun Fighters P-51 ARF Assembly Instructions Manual page 19

STEP 6: INSTALLINg THE RUDDER CONTROL HORN
IMPORTANT Don't forget to apply a couple of drops of thin C/A into the mounting holes to harden the surrounding wood and
make the mounting area stronger.
STEP 7: INSTALLINg THE RUDDER PUSHROD ASSEMBLY
❑ Slide the rudder pushrod assembly into the fuselage and guide the threaded pushrod wire out through the rudder pushrod
exit slot.
❑ Use a couple of pieces of masking tape, taped between the rudder and the stabilizer, to hold the rudder centered.
❑ Cut away the covering material from over the rudder pushrod exit slot in
right side of the fuselage. The slot is located 2-3/4" (70mm) in front of the
rudder hinge line and 3/4" (19mm) up from the bottom of the fuselage.
❑ Install one control horn and backplate onto the right side of the rudder,
using two M2 x 16mm machine screws. When aligned properly, the centerline
of the control horn should be 7/16" (11mm) up from the bottom of the rudder
(measured at the hinge line) and the clevis attachment holes should be lined
up over the hinge line. The base of the control horn should be parallel to the
hinge line, too.
❑ Thread one clevis onto the pushrod wire and snap the clevis into the
outermost hole in the control horn.
❑ Cut away all but one arm from a "4-point" servo horn.
❑ Enlarge the hole that is 7/16" (11mm) out from the center of the servo
horn, using a 5/64" (2mm) diameter drill bit.
❑ Center the rudder servo, then install the servo horn onto the servo,
making sure that the servo horn is centered and pointing toward the left
side of the fuselage.
❑ With both the rudder and the servo horn centered, draw a mark on the
rudder pushrod wire where it crosses the hole that you enlarged in the
servo arm.
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