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steP 2: iNstaLLiNG tHe ruDDer CoNtroL HorNs
q
Install one control horn onto each side of the rudder, using the same
techniques that you used to install the elevator control horns. The centerline
of each control horn should be 1/2" (13mm) 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 both control horns should be parallel to
the hinge line, too.
IMPORTANT
Remember to apply a couple of drops of thin C/A into the
mounting holes to reinforce the surrounding wood.
q
Cut away the covering material from over the two rudder cable exit slots
in the top of the fuselage. One slot is located on each side of the vertical
stabilizer, 1/8" (3mm) out from the edge of the triangle supports and 2-1/2"
(64mm) in front of the rudder hinge line.
steP 3: iNstaLLiNG tHe ruDDer PuLL-PuLL CaBLes
q
Cut the stranded pull-pull cable exactly in half, then install one threaded
coupler onto one end of each length of cable, using the same techniques
that you used to install the threaded couplers onto the two lengths of
elevator pull-pull cable.
q
Cut 1/4" (6mm) off the end of each of the two threaded couplers to make
them shorter.
q
Thread one clevis onto each of the two threaded couplers, then feed the
plain end of each of the two lengths of cable through the rudder cable guides
in the top of the fuselage.
q
Snap each clevis into the
outermost hole
in the control horns.
q
Cut away two arms from a "4-point" servo horn.
q
Enlarge the hole in each servo arm that is 3/4" (19mm) out from the center
of the servo horn, using a 5/64" (2mm) diameter drill bit.
IMPORTANT
It's not necessary to cut away the lower-most clevis attachment hole in either of the two control horns.
IMPORTANT
Make sure to apply a drop of thin C/A to each of the four hex nuts to lock them into place.
q
Use a couple of pieces of masking tape, taped between the rudder and the stabilizer, to hold the rudder centered, then center the
rudder servo and install the servo horn onto the servo, making sure that it's centered. Install and tighten the servo horn retaining
screw to hold the servo horn securely to the servo.