GREAT PLANES Ryan STA EP Instruction Manual page 14

13. From the 1/16" x 3" x 30" [1.6mm x 76.2mm x
762mm] balsa sheet that the shims were cut from, cut and
glue vertical grain shear webs to the spars in the locations
shown on the plan. It is not necessary for the shear webs to
be glued to the ribs. Make sure they are glued securely to
the wing spars. Do not install shear webs in the rib bays
between ribs W1 and W3. (The shear web in the aileron bay
should be attached to the front of the main spars.)
14. Use a 1/16" x 3" x 30" [1.6mm x 76.2mm x 762mm]
balsa sheet to make the TE sheet. Cut the sheet so that it
is 23" [584mm] long and 2-1/4" [57.2mm] wide. Glue the TE
sheet in the indentations at the aft end of the wing ribs. The
sheet should butt against the aft end of ribs W1 through W3.
Save the 3/4" [19mm] piece you cut off.
15. Sand the balsa sub LE flush with the top of
the ribs.
16. Glue the die-cut 3/32" [2.4mm] balsa rib doubler
W1A to the inside forward edge of rib W1.
17. Cut a 1/16" x 3" x 30" [1.6mm x 76.2mm x 762mm]
balsa sheet 23" [584.2mm] long. Fit the sheet in place,
against the notch in the ribs and on top of the main spar.
Glue the balsa sheet to the main spar and notches. When
the glue has cured, apply a bead of glue to the top of each
rib and along the sub LE. Pull the sheeting down, making
sure it contacts the surface of each rib and sub LE. Hold it
in place until the glue has cured.
18. Sheet the center-section with the remaining 7"
[177.8mm] long, 1/16" [1.6mm] balsa sheet cut in the last step.
19. Remove the wing panel from your building board.
Trim and sand the LE sheeting flush with the sub LE. Sand
the LE and TE sheeting, main spars and sub LE flush with
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