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the square end of the rib gauge to keep the ribs perpendicular
to the work surface.
DD 10. Trial fit the top 1/8" x 5/16" x 23-1/2" Basswood
Inner Spar (SPRTW13) into the notches in the ribs by
carefully pushing the spar completely down into the notches.
Make sure the top spar is lined up lengthwise with the bottom
spar. Remove the spar and glue it in place by applying thick
CA to the notches before the spar is put back in place.
DD 11. Position a Pre-shaped Leading Edge (SPRTW 10)
in place over the plans. NOTE: These leading edges are
NOT symmetrical. Refer to the wing end view on the plan
to determine which way they should be installed. Carefully
hold the leading edge against one of the end W-2 ribs and note
that it is wider than the front of the rib. This is because the 1/
16" balsa leading edge top sheeting will be added later. Align
the lower surface of the leading edge with the bottom of the
rib and glue it in place with a drop of thin CA (there must be
a 1/16" gap between the top of the rib and the top of the LE
so the sheeting will fit). Lift up the other end of the leading
edge, align it with the bottom of the opposite end W-2 and
glue it with a drop of thin CA. Go down the line and glue the
remaining ribs to the leading edge one at a time so you can
make sure they are aligned. CA Accelerator may come in
handy for speeding up this process if you don't want to hold
the LE in place long enough for the glue to cure naturally.
DD 12. Locate the 1/16" Balsa Die-Cut Shear Web
Sheet (SPRTW07) and notice that all of the shear webs are
not the same. The webs between the stamped number 2's are
for use on the inner panel. The webs between the 2 and the 10
are for the outer panel and each one of these is a different size
so keep them in the sheet until they are ready to be used.
Punch out all of the "2" shear webs.
DD 13. Trial fit one of the webs in place between the first
two W-2 ribs. You may have to sand it slightly to get it to fit.
Glue the shear web in place on the back of the spars using
thick CA. The webs should be centered between the spars. It
is important to do a good job of gluing these in place as they
are responsible for most of the wing's strength. C-2 Clamps
from the 1/8" Die-Cut Plywood Sheet (SPRTW08) can be
used to help hold the webs in place while the glue cures.
DD 14. Install the remaining balsa shear webs. Note that
the webs are only installed between the ribs already glued in
place. Three webs are also installed on the front of the spars
in the first three rib "bays". Remove the T-Pins as the webs
are installed but make sure the panel is kept flat throughout
this process.
IF YOU ARE BUILDING A ONE-PIECE WING, SKIP
AHEAD TO "BUILD THE OUTER WING PANELS"
ON PAGE 13. STEPS 15 THROUGH 23 ARE FOR A 2-
PIECE WING ONLY.
DD 15. Locate the 1/8" die-cut sheet (SPRTW04) that
contains the Dihedral Braces, the Leading Edge Brace and
the Wing Joiner Lamination. Line a ruler up with the two
embossed cut marks and draw a line across both of the
dihedral braces.
DD 16. Punch out the two dihedral braces and cut them in
half with a razor saw along the lines you just drew. Note:
these braces are supplied in one-piece for the one piece
option. Also punch out the wing joiner lamination from that
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