Dynaflite DYFA3040 - Manual (Page 19)

Q Q 1. Lay the right wing plan on your building
board and cover it with Plan Protector.
Note: It will be easier if you prepare all four
leading edge wing skins at the same time.
BOTTOM WING SKIN
USE LEFTOVER
FOR OTHER SKIN
CUT FROM
CORNER
TO CORNER
3/32" X 3" X 42"
BALSA SHEETING
CUT
LINE
3/32" X 3" X 48"
BALSA SHEETING
SCRAP
BALSA
TOP WING SKIN
SAVE LEFTOVER FOR
FUSE SHEETING
3/32" X 3" X 42"
BALSA SHEETING
CUT LINE SCRAP
BALSA
6-3/8"
WIDE
3"
WIDE
3/32" X 3" X 48"
BALSA SHEETING
Q 2. Prepare the four leading edge wing skins
according to the sketches above. The skins for
the top of the wing are 3/8" wider than those for
the bottom. Glue the skins together using your
favorite method (we use masking tape to form
a hinge and then join them with aliphatic resin
glue). Sand the best side smooth with 150-grit
sandpaper.
U U 3. Pin the 1/4" x 3/8" x 44" basswood lower
spar over the plan.
l-l t-l 4. Pin a 1/4" x3/8" x 44" basswood stick on
the dashed lines called "shim stick." This will
hold the rear of the ribs at the proper angle until
there are enough pieces to hold the wing rigid.
(Save the shim stick for later use.)
Q 5. Punch the ribs from their die-cut sheets,
sanding the backs of the sheets lightly if they do
not come out easily. Number each rib as you do
so; don't forget to number the aileron and flap
ribs as well. Check the fit of the spar to the spar
notches in each rib.
Note: If you will be building functional flaps for
your Chipmunk, glue in the rear lightening
holes in ribs W4 and W5.
Q 6. Glue the die-cut 1/8" ply landing gear
doublersto ribsW2,W3 andW4 using 30-minute
epoxy. Glue them to the sides shown on the
6" WIDE
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