Dynaflite DYFA3045 - Manual (Page 17)

edge using the 3/32" x 3" [2.4 x 75mm] balsa
sheet left over from making the first center
panel trailing edge for the bottom center panel.
Make the skins and save the leftover pieces for
shear webs. Glue the top center panel to the
bottom skin, add the balsa shear webs, then
glue the top skin to the panel. Sand the ends of
the sheeting even with the ribs and sub leading
edge, then cut out the ribs on the ends of the
panel between the spars. Add the leading edge
cut from the 1/4" x 5/8" [6.4 x 15.9mm] balsa
stick left over from the leading edge on the
bottom center panel, then sand to match the
shape of the ribs. Set the top center panel aside.
Note: All four outer panels are nearly identical.
The only differences are that, obviously, there
are two rights and two lefts. The only difference
between the top and bottom panels is the 1/16"
[1.6mm] plywood rib assemblies at R4 where
the wing struts connect.
Start with the left, bottom outer panel first.
❏ ❏ ❏ ❏
1. Position the left outer wing panel
plan over your flat building board and cover it
with wax paper or Plan Protector.
❏ ❏ ❏ ❏
2. Referring to the illustrations near
the leading edge of the left panel on the wing
plan, use medium CA to glue together the die-
cut 1/8" [3.2mm] plywood rib R4A, the die-cut
1/16" plywood rib R4B and the die-cut 3/32"
[2.4mm] balsa rib R4. Be certain you are
looking at the correct illustration for the wing
panel you are working on (top or bottom).
Refer to this photo for the following
six steps.
❏ ❏ ❏ ❏
3. Cut the forward spar 1/8" [3mm]
longer than shown on the plan from a 1/8" x 1/4"
x 24" [3.2 x 6.4 x 610mm] basswood stick. Cut
the aft spar 1/8" [3mm] longer than shown on
the plan from a 1/8" x 1/4" x 30" [3.2 x 6.4 x
760mm] basswood stick.
❏ ❏ ❏ ❏
4. Cut the bottom leading edge
sheet 1/8" [3mm] longer than shown on the
plan from a 3/32" x 3" x 24" [2.4 x 76mm x
610mm] balsa sheet.
❏ ❏ ❏ ❏
5. Glue the forward spar to the top of
the leading edge sheet along the aft edge. Pin
the spar and sheeting to the plan.
❏ ❏ ❏ ❏
6. Cut 4-1/2" [115mm] from a 3/32" x
4" x 30" [2.4 x 100 x 760mm] balsa sheet. Add
the 4-1/2" [115mm] sheet to the stack of sheets
you’ve been saving for shear webs.
❏ ❏ ❏ ❏
7. Cut the 25-1/2" [650mm] sheet from
the previous step into two 1-1/2" [38mm] wide
strips to make the trailing edge sheets. The
same as was done for the leading edge sheet,
cut the trailing edge sheet 1/8" [3mm] longer
than shown and pin to the plan. Save the other
1-1/2" [38mm] wide strip for the top.
BUILD THE OUTER PANELS
17