Great Planes 38% Extra 330S ARF - GPMA1290 - Manual (Page 12)

12
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4. Mount the aluminum tail wheel arm where shown by
drilling 1/16" [1.6mm] holes for the three #2 x 3/8" [10mm]
mounting screws—don’t forget to harden the “threads” in the
holes with thin CA.
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5. Test fi t the rudder to the fuselage with all fi ve hinges.
Make sure the hinges fi t and align—each hinge should be
exactly halfway in both parts and there should be a small
hinge gap—just enough to see light through or to slip a piece
of paper through. Make any adjustments necessary for a
good fi t.
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6. Take out all the hinges. Add a few drops of plastic-
compatible oil to the pivot point of each hinge using care not
to get any oil on the rest of the hinge.
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7. Use 30-minute epoxy to permanently join the rudder
to the fuselage with all the hinges—use a piece of wire to
thoroughly coat the inside of each hinge hole and the hinges
before inserting them. Do not use 5-minute or 15-minute epoxy
for hinging—otherwise, you may run out of working time!
Install the Rudder Servos
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1. Use coarse sandpaper to roughen the bottom of the
aluminum rudder servo tray so glue will adhere. Glue the plywood
rudder servo tray doubler to the bottom of the tray with medium
CA or epoxy. Glue six 1/4" x 1-1/2" [6 x 38mm] plywood strips
across the bottom of the doubler for the servo screws.
4-40 x 1/4" [6.4mm]
SHCS w/#4 Lock Washers
Ball Bearing
Tiller Post
Tiller Arm
4 x 25mm SHCS
4mm Lock Nut
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2. Mount the rudder servos in the tray. Harden the the
holes with CA. Mount the tiller arm using the hardware
shown—be certain to use threadlocker on the threads of the
4-40 screws. Tighten the 4mm bolt in the tiller arm until there
is no more free play, but the arm still rotates freely.
Reverse Thread Normal Thr
ead
Cut
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3. Cut the “normal” threaded end off two dual-ended
ball links.
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4. Assemble two rudder pushrod assemblies using
the hardware shown in the Rudder Pushrod Assembly
illustration on page 26.