GREAT PLANES Super Sportster 90 Instruction Book page 10

IMPORTANT NOTE!!!!!!!!!!!!!!!!!!
When building the right wing panel, position
the ribs so the landing gear block notches in the W-2
ribs are down, and the servo opening in rib W-1 is
up.
When building the left wing panel, position
the ribs so the landing gear block notches in the W-2
ribs are up, and the servo opening in rib W-1 is
down.
DO NOT BUILD TWO
HALVES!!!!!!!!!!!!!!
D D 9. Place the ribs on the spar in their approxi-
mate positions, but do not glue.
D D 10. Hold the notched balsa trailing edge in
place (with jig attached) and carefully work
the ribs into the notches, centering each rib up
and down. In the same manner, insert the ribs
into the notches in the balsa leading edge. Note
that one end of the leading and trailing
edge stock has a notch at the end, and this
notch must be at the wing tip. Do not glue
anything yet.
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
PLEASE STUDY THE FOLLOWING NOTE
AND THE ACCOMPANYING
BEFORE PROCEEDING!
RIGHT WING
PHOTOS
10
Note that the leading and trailing edges do not have
a notch for the W-1 rib. Use the 1/8" die-cut ply
dihedral gauges "DGR" and "DGL" to position rib
W-1 at the proper angle. When building the right
wing panel, use dihedral gauge DGR to position W-1,
setting the rib's location and tilt with the point of
DGR on the "Right Wing Panel Centerline". When
building the left wing panel (upside down), use di-
hedral gauge DGL to position W-1, with the point
of DGL on the "Left Wing Panel Centerline".
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D D 11. Insert the top spar into the notches in the
top of the ribs, with the right end even with
the outside edge of the tip rib.
D D 12. Make sure the tip rib is vertical (90 degrees
to the work surface), that the spars are lined
up with the outside edge of the tip rib, that rib
W-1 is set at the proper angle, and that all
parts are properly aligned. Apply thin CA glue
to all joints (but do not glue the "jig stick" to
the TE!). Then apply thick CA glue to all joints
which are not tight-fitting.
D D 13. Glue the 1/8" ply dowel reinforcing plate
to the back of the leading edge, between W-1
and W-2.
D D 14. Glue the pre-cut 1/16" balsa shear webs
to the rear edge of the spars in all rib bays
except between W-1 and W-2.