Use the “crossed-pin” technique to pin the
spars to the plan over the location for the
forward
and
aft bottom spars
.
❏
3. Use a hobby knife and a straightedge to
cut partway through
opposite
sides of both
die-cut 3/32" [2.4mm] balsa wing ribs
R2
between the forward spar notches.
Refer to this photo for the following
six steps.
❏
4. With the cuts made in the previous step
facing outward, glue both R2 ribs and the three
die-cut 1/8" [3.2mm] plywood
R1B
ribs to the
spars over their location on the plan. Use a
small builder’s triangle to hold the ribs vertical
as you glue. It is
especially
important that the
outer R2 ribs are vertical.
❏
5. Cut another 1/8" x 1/4" x 24" [3.2 x 6.4 x
610mm] basswood stick into two 9-5/8" [245mm]
pieces. Glue them into the notches in the top of
the ribs for the
forward
and
aft top spars
. The
same as when gluing the ribs to the bottom
spars, use a small builder’s triangle to hold the
ribs–especially the outer ribs–vertical as you glue.
❏
6. Glue the four die-cut 1/8" [3.2mm] plywood
inner bottom webs
(labeled
“IBW”
on the
part) to the spars and ribs where shown. Glue
the die-cut 1/8" [3.2mm] plywood
leading
edge doubler
(labeled
“LED”
on the part) to
the R1B ribs, then cut the
sub-leading edge
from a 1/16" x 3/8" x 24" [1.6 x 9.5 x 610mm]
balsa stick and glue it into position. Save the
remainder of the stick for the top center panel.
❏
7. Cut 4" from each of three 3/32" x 3" x 24"
[2.4 x 76 x 610mm] balsa sheets. After doing so,
you will have three 3/32" x 3" x 4" [2.4 x 76 x
102mm] balsa sheets. These are to be used for
shear webs
. You will also have three 3/32" x 3"
x 20" [2.4 x 76 x 510mm] balsa sheets to be used
for sheeting the center panel.
❏
8. From one of the 3/32" x 3" x 4" [2.4 x 76 x
102mm] balsa sheets, cut two
shear webs
for
the front of the forward spars. Note that the
grain is vertical. Glue the shear webs into
position.
❏
9. Remove the bottom inner panel from the
plan. Use a bar sander to sand off any glue
bumps or uneven surfaces from the bottom of
the panel.
❏
10. Using one of the die-cut 3/32" [2.4mm]
balsa
center panel trailing edges
(labeled
14
Summary of Contents for Dynaflite S.E.5a
Page 9: ...9 Die Drawing...
Page 10: ...10 Die Drawing...
