Wing; Build The Wing Panels - GREAT PLANES Super Sportster 90 Instruction Book

D 2. Cut the hinge slots on the accurate center-
lines which you previously drew, using a
standard slotting fork and slotting hook. Be-
cause the hinges are wider than normal, you
should use the following procedure: When first
inserting the slotting fork, push it in only part-
way along one side of the hinge location, then
push it in the full depth along the other side
of the hinge location, finally, go back and com-
plete the push in the original position. Clean
out the slot with the slotting hook.
D 3. IMPORTANT! Condition or "break-in" the
hinges by folding them tightly back and forth
several times.
D 4. Insert the hinges into the slots and trial fit
the rudder and elevators in place on the fin
and stab. Do not glue the hinges until after
you have covered the model.

WING

BUILD THE WING PANELS

D 1. Tape the wing plan to your flat building
surface, and tape a sheet of waxed paper over
the wing panel portion of the plan.
Q 2. Punch out all the wing ribs from the die-cut
sheets. Compare the ribs with the wing rib pat-
terns on the wing plan and arrange them into
stacks of the same kind of ribs.
D 3. Note that the drawing of rib W-2 shows the
two alternate locations for the main landing
gear blocks. Note also that the W-2 ribs have
partial cutouts for each of the two locations.
If you are building your plane as a taildragger,
cut out the front notches in the W-2 ribs. If
you are building your plane with a tricycle
gear, cut out the rear notches. Trim the die-cut
1/16" ply doublers, and glue them to the W-2
ribs as shown on the plan.
D 4. The notched balsa leading and trailing edges
are supplied in one shaped piece and are held
together by thin strips of balsa. Break these
apart now, and break off any remaining pieces
of the thin balsa. Sand the edges straight with
your T-Bar sanding block.
NOTE: Follow steps 5 through 28 to build the
RIGHT wing panel, then repeat these steps to
build the LEFT wing panel UPSIDE DOWN.
Lt. Rt.
D D 5. Glue two W-3 ribs together to make one tip
rib.
D D 6. Draw an accurate centerline along the rear
edge of the notched balsa trailing edges.
D D 7. Pin one of the notched balsa trailing edges
to the 1/4" x 1-5/32" x 33" balsa jig stick as
shown in the following sketch. Note that the
top of the jig stick must be on the centerline
which you have drawn on the trailing edge.
Notched Balsa
Trailing Edge
Table
Top
D D 8. Place one of the 3/8" x 1/2" basswood main
spars on the wing plan, line up the right end
with the outside edge of the tip rib and pin the
spar down with crossed T-pins as shown in the
following sketch. NOTE: If you prefer not to
use pins, you may hold the spar firmly in place
using "shot bags" as shown in the photos, which
are made by partially filling a sock with lead
shot.
T-PINS
T-Pin
_Balsa
Jig Slick
SPAR