Great Planes Ultra Sport 40 Kit - GPMA0410 - Manual (Page 11)

12. Insert the rear ends of the ribs into the
notches in the TE. then block up the TE with the 1/4"
balsa TE Jig supplied. NOTE: The narrow end of the
TEjig is at rib W-11. Pin the jig to the building surface.
the TE, LE and bottom spar. Glue all other ribs to the
LE and bottom spar.
17. Glue the top sparin place, making sure you
do not change the angle of W-1.
13. PintheTEtotheTEJig.makingsuretheribs
line up with the plan.
14. Glue ribs W-2 through W-11 to the TE.
(Apply glue sparingly, to avoid gluing the TE to the TE
Jig).
15. Insert the front ends of the ribs into the
notches in the LE. NOTE: Position the LE as shown in
the sketch.
18. Glue the pre-cut 3/32" balsa vertical grain
CENTER L.E. VERTICALLY
ON FRONT OF RIBS
16. Make sure the ribs are fully down on the plan
and all ribs are inserted into the LE notches. Angle rib W-
1 slightly using the dihedral gauge (DG). Glue W-1 to
shear webs to the rear edge of the spars in all rib bays
except between ribs W-1 and W-2. NOTE: You may
wish to trial fit, mark, and trim each web before gluing
in. NOTE: The webs must be securely glued to the
spars, but it is not necessary to glue the webs to the ribs.
19. You will now make a "pocket" for the
1/16" ply dihedral brace by installing a 3/32" balsa
L.E.
11