Great Planes Yak-54 1.60 ARF - GPMA1411 - Manual (Page 16)

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1. Secure a 6" [152 mm] servo extension to each rudder
servo. Position the rudder servos into the servo tray as
shown and mark the mounting hole locations. Drill a 1/16"
[1.6 mm] hole through the mounting holes of each servo.
Install and remove a mounting screw from each hole and
apply a drop of thin CA into the holes to harden the wood.
After the glue has cured, install the servos into the openings
using the hardware that came with your servos. Center the
servos with your radio system.
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2. Trim the covering from the rudder cable exit slots as
shown in step 3.
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3. Locate the plywood mounting plates beneath the
covering on both sides of the rudder. Place a heavy-duty nylon
control horn on each side of the rudder. Position them as
shown, aligning them with the slots for the rudder cable. Mark
the location for the screw holes. Drill through the marks you
made with a 3/32" [2.4 mm] drill bit. Using a #4 x 5/8" [16 mm]
sheet metal screw, install and then remove a screw into each
of the holes. Harden the holes with thin CA. Install the control
horns with eight #4 x 5/8" [16 mm] sheet metal screws.
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4. Cut the provided pull-pull cable into two equal lengths.
Thread a 4-40 nut and a silicone clevis retainer onto each of
the four brass pull-pull threaded couplers and then thread
the couplers into four 4-40 metal clevises twelve complete
turns. Feed only one end of each cable through the hole in
the brass coupler 3/4" [19 mm] and fold it back onto itself.
Slide a swage onto the cable over the short end, loop the
short end around through the swage again, and crimp them
together using heavy-duty pliers as shown. The other ends
of the cables will be connected to the threaded couplers
after being installed into the fuselage.
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5. Feed the pull-pull wires through the slots in the
fuselage near the rudder control horns. Be sure that the
other ends make it through the fuselage to the rudder
servos. Turning the airplane up on its nose and feeding the
cable ends into the fuse makes this task easier.
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6. Two 3-9/16" [90mm] aluminum servo arm extensions are
included for the rudder pull-pull system. Locate the large servo
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