Great Planes Super Sportster 40 MkII Kit - GPMA0205 - Manual (Page 9)

D D 5. Don't use any glue until instructed to do so. As
the wing panels are built upside-down, fit the W-2 and W-3
ribs to the spar with the landing gear notches pointing
upward. Check that the ply doublers are on the correct side
of the ribs as shown on the plans. Add the remaining W-4
ribs all the way to the wing tip. The jig tabs on the
building board should be closer to the TE than the jig
tabs facing upward.
D D 6. Sight down the length of the TE. Check that all ribs
are aligned and have the correct side up.
D D 11. Test fit the forward and aft die-cut 1/8" ply wing
dowel supports in the notches in W-2. The aft wing dowel
support will fit correctly only one way. Wiggle rib W-1 into
position, popping it into the LE and TE notches.
Note: The LE and TE notches need to be widened slightly
to allow for the rib angle. The tabs on the wing dowel
supports fit into the die-cut slots in W-1. Don't glue
anything yet!
D D 7. Fit the notched leading and trailing edges to the
ribs. The LE must be centered vertically on each rib. The
TE should be flush with the top and bottom of the ribs. Align
the ribs over the plans and true everything up. Glue W-2
and the wing tip W-4 rib to the TE, then pin the TE to the
building board to keep the wing flat.
D D 8. Sight down the TE from the wing tip. If the TE is not
straight, insert folded paper strips under the jig tabs of each
low rib until the TE is straight. While holding each rib in
contact with the building board (or paper shims), use thin
CA to glue all remaining ribs to the TE.
D 1-1 9. Repeat this gluing process for the LE. Start with
the two outside ribs, then work toward the center. Make
sure that each rib is pressed firmly onto the spar and is also
aligned with the plans.
D D 12. Draw a line through the two index marks on the
die-cut 1/8" ply rib angle gauge. Hold the gauge against
W-1 with the line you drew on the reference line on the
plans. The angle of the rib and wing dowel supports should
match the angle of the gauge. If not, examine your work
and correct any mistakes before gluing the assembly in
place. When satisfied with the fit, use medium CA to glue
the assembly together.
D D 10. Glue the ribs to the lower spar, then install and
glue the upper 3/8" x 3/8" x 25-1/4" balsa spar in position.
Be sure to keep the ribs vertical as you do this step. D D 13. Trim and sand the LE, TE, and spars flush with
W-1. Trim only the TE and spars flush with W-4 at the tip.
Leave the LE long for the time being.
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