Great Planes PT-40 Kit (original) - Manual (Page 16)

D 3. With the rudder attached to the fin by the top
three hinges (not glued in), trial fit the fin onto the
fuse. If the rudder is too long and touches the flat
work surface preventing the fin from resting on the
stab, sand a small amount off the bottom of the rudder.
D 4. Apply 5 minute epoxy to the bottom of the fin
and position the fin between the guidelines you pre-
viously drew. Slide the fin/rudder assembly forward
until the bottom of the rudder just touches the back
of the fuse. Wipe away any excess epoxy with a tissue.
D 5. Before the epoxy sets, check the squareness
of the fin with the stab, using a small carpenter's
square or draftsman triangle. Hold position until the epoxy sets firmly.
D 6. Find the two 4-7/8" lengths of l/4"balsa triangle
and sand the ends to a rounded (or pointed) shape
as shown on the plan. Trial fit these pieces in place
at the fin/stab joint. Later, when you are covering
the model (and before you cover the fin and stab)
cover the outer surface of these triangular pieces,
leaving about l/8"of excess covering all around the
edges. Then glue these pieces in place and iron down
the excess covering to the fin and stab
D 7. You previously marked the four hinge loca-
tions on the rudder. Now transfer the bottom hinge
location over to the rear of the fuse. Cut the hinge
slot in the tapered balsa fuse tail filler.
(See photo, top of next column.)
D 8. Now temporarily assemble the elevator to
the stab and the rudder to the fin. Swing the rudder
from side to side and the elevator up and down. The
rudder and elevator must not touch in any pos-
ition! If they do, carve or sand the notch in the rudder
to insure that they will not bind. In addition, make
sure no part of the fin interferes with the free upward
movement of the elevator.
Lay the fuselage assembly aside for now.
CHARGE YOUR NICAD BATTERIES
D 1. Read the instruction manual for your radio
system to become familiar with how to hook it up.
D 2. Charge your transmitter and receiver bat-
teries now so they will be ready when you need them.
Note: Charge the batteries for the time recom-
mended for the first charge...usually 18-24 hours.
BUILD THE WING PANELS
NOTE: Like the fuselage, the PT40 wing is
made to fit together without glue, so you can assem-
ble all of the major parts and check to make sure
they are all lined up before applying thin CA to the
joints.Thick CA will be added after the thin CA has cured.
D 1. Turn the plan over to side 2, which shows the
wing. Tape or pin the plan to your flat work surface
so the "Right Wing Panel" is facing you. Cover the
right wing panel drawing with waxed paper (so you
won't glue the wing to the plan!).
D 2. The shaped and notched wing leading edge
(L.E.) and trailing edge (T.E.) are fastened together
by a thin layer of balsa. Separate them by folding
until the balsa breaks. Sand away the excess balsa
that remains along the edges after breaking them
apart, using a T-bar with 100 grit sandpaper.
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