edges are NOT symmetrical. Refer to one of the section
views on the plans 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. 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.
DD 9.
Make sure the ribs are properly positioned accord-
ing to the plans and glue them in place using thick CA at the
spar joint and a drop of thin CA at the trailing edge joint. Use
the square end of the rib gauge to keep the ribs perpendicular
to the work surface. NOTE: if you are installing spoilers,
cut out the embossed area on the two W2S ribs and make
sure you install these ribs in the proper locations.
1/16" sheeting will
be added later
-Bottom of rib should
be f l u s h with bottom
of leading edge.
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 lop 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
(SPRTW10) in place over the plans. NOTE: These leading
10
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 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 (up and down)
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
