Great Planes PT-60 Kit - GPMA0119 - Manual (Page 11)

D. Insert the hinges and install the control surface.
Verify the left-right positioning of the control surface, and
close up the hinge gap to 1/32" or less. It is best to leave
a very slight hinge gap, rather than closing it up tight, to
help prevent the CA from wicking along the hinge line.
Make sure the control surface will deflect to the
recommended throws without binding. If you have cut
your hinge slots too deep, the hinges may slide in too
far, leaving only a small portion of the hinge in the
control surface. To avoid this, you may insert a small
pin through the center of each hinge, before installing.
This pin will keep the hinge centered while installing the
control surface. Remove the pins before proceeding.
D 9. Sand the LE of the elevator and rudder to a "V"
shape as shown on the plans, but leave the TE of the stab
and fin squared off.
D 10. Test fit the elevator and rudder.
Congratulations! You made it through the first stage and
should be proud of yourself. You should also have learned
a few "tricks of the trade" as used by the guys that
designed this kit. Remember, all us modelers are just
"plane folks" and we like to help where we can...
D 1. Lightly sand the edges of the three die-cut 1/8" balsa
fuse side pieces. Test fit the upper, lower and aft sections
as shown in the photo. When satisfied with the tit, make a
fuse side using thin CA to glue the three parts together over
waxed paper covered plans. Make a second fuse side in the
same manner. Use fresh, 220-grit sandpaper on a sanding
block to go over all joints to make sure they are smooth.
D 2. Examine the two fuse sides for blemishes, then
position them on your workbench exactly as shown in the
photo, with the "bad" sides facing up if possible. You need to
build a right and a left side so be sure that the sides are
mirrored as you look at them. Mark the inside surfaces with
"right" and "left."
D 3. Lightly sand the edges of the die-cut 1/8" ply upper
and lower fuse doublers (See the Die-Cut patterns on
page 7.) Drill a 1/16" hole at each of the punch marks on all
the fuse doubler parts. These holes allow CA to wick into
the center portions of the doublers when you glue them to
the fuse sides.
D 4. Align the top edge of the top doubler with the top of
the fuse side at the wing saddle. Slide it back and forth
until the front edge of the windshield and rear end are
aligned as shown in the photo. The balsa side behind the
wing saddle protrudes above the doubler by 1/8". Take
your time as this is a crucial step in building a straight fuse.
When the doubler is positioned, wick thin CA between the
doubler and the fuse side, around all edges and also
through the holes you drilled. While holding the doubler in
position, wipe away any excess CA with a tissue or paper
towel before it cures.
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