Model Tech Fun Fighters P-51 ARF Assembly Instructions Manual page 18

STEP 4: INSTALLINg THE ELEvATOR PUSHROD ASSEMBLY
❑ Slide the split elevator pushrod assembly into the fuselage and guide the two threaded pushrod wires out through the elevator
pushrod exit slots.
IMPORTANT To make guiding the pushrod wires through the exit slots easier, gently spread the two pushrod wires into a
shallow "Y" shape.
❑ Remove the masking tape and move the elevator halves up and down several times to ensure that the linkage assembly does
not bind. It should operate smoothly in both directions. Both elevator halves should be even with each other and they should both
produce the same amount of control throw throughout the entire up and down deflection range, too.
STEP 5: ASSEMBLINg THE RUDDER PUSHROD
❑ Use a couple of pieces of masking tape, taped between the elevator halves
and the stabilizer, to hold both elevator halves centered.
❑ Thread one clevis onto each pushrod wire and snap the clevises into the
outermost hole in the control horns.
❑ Cut away all but one arm from a "4-point" servo horn.
❑ Enlarge the hole that is 9/16" (14mm) out from the center of the servo
horn, using a 5/64" (2mm) diameter drill bit.
❑ Center the elevator servo (the right-side servo), then install the servo
horn onto the servo, making sure that the servo horn is centered and pointing
toward the middle of the fuselage.
❑ With both elevator halves and the servo horn centered, draw a mark on
the elevator pushrod wire where it crosses the hole that you enlarged in the
servo arm.
❑ Carefully bend the pushrod wire down at a 90º angle at the mark you drew,
then cut off the excess, leaving 5/16" (8mm) of wire beyond the bend.
❑ Install the 90º bend in the pushrod wire into the hole that you enlarged
in the servo arm, using one snap-keeper, then reinstall the servo horn onto
the elevator servo, making sure that it's centered.
❑ Install the servo horn retaining screw to secure the servo horn to the
servo.
❑ Cut the remaining hardwood dowel to a length of 10-3/4" (273mm), then
assemble the rudder pushrod, using the same techniques that you used to
assemble the elevator pushrod.
IMPORTANT Both pushrod wires should be 5-1/2" (140mm) long and
you should install them perpendicular to each other.
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