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STEP 5: INSTALLING THE RUDDER CONTROL HORN AND CLEVIS
❑
Position one nylon control horn onto the right side of the rudder.
When aligned properly, the centerline of the control horn should be
even with the rudder pushrod wire (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 bottom of the rudder, not the
hinge line.
❑
When satisfied with the alignment, mark and drill 5/64" diameter
pilot holes through the elevator for the control horn mounting screws.
Before installing the control horn 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 wood, making the mounting area stronger.
❑
Install the control horn and backplate, using two M2 x 12mm machine screws, being careful not to overtighten them.
PRO TIP
❑
Use a couple of pieces of masking tape, taped between the rudder
and the fuselage, to hold the rudder centered.
❑
Thread one nylon clevises onto the pushrod wire and snap the clevis
into the
second hole
out from the base of the control horn.
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To make it easier to install the clevis, remove the servo arm from
your servo and pull the pushrod wire back far enough to give yourself
enough room to thread the clevis on. Hold the pushrod wire with a pair
of pliers to prevent it from turning while installing the clevis.
❑
Remove the masking tape from the rudder and double-check that the servo arm and the rudder are still centered. If the rudder
is not centered, adjust the clevis until it is. Move the rudder right and left several times to ensure that the pushrod assembly does
not bind. It should operate smoothly.
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Kwik Bond 5 Minute Epoxy
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# 1 Phillips Head Screwdriver
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Needle Nose Pliers
❑
Excel Modeling Knife
❑
Electric Drill
❑
1/16" & 5/64" Drill Bits
❑
Ruler
❑
(2) 3-1/2" Threaded Wires w/90º Bend
❑
(2) Nylon Control Horns (Large)
❑
(4) M2 x 10mm Wood Screws
❑
(2) Nylon Clevises
❑
(2) Nylon 90º Snap-Keepers
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Pencil
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Masking Tape
❑
Paper Towels
❑
Rubbing Alcohol
❑
NHP Epoxy Mixing Sticks
❑
NHP Epoxy Mixing Cups
❑
Global Heat Gun
YOU'LL NEED THE FOLLOWING PARTS FROM THE KIT:
YOU'LL NEED THE FOLLOWING TOOLS AND SUPPLIES:
SECTION 15: AILERON CONTROL SYSTEM INSTALLATION
STEP 1: INSTALLING YOUR AILERON SERVOS
❑
Install the rubber grommets and brass collets onto your two aileron servos, making sure to install the collets with the flanges
toward the bottom of the servos.