Dynaflite GPMA0510 Super Decathlon - Manual (Page 9)

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BUILD THE WING
Note: The airfoil used on this plane is semi-
symmetrical. We positioned the embossed labels
on the die-cut 3/32" balsa ribs so that they are
right-side up when the wing is right-side up. This is
the easiest way to reference the top and bottom of
the ribs.
❏ 1. Glue the two die-cut 1/8" ply W1 doublers to
the two W1B ribs. Glue the two die-cut 1/8" ply W3
doublers to two of the W3 ribs as shown. Note:
These parts mirror each other.
❏ 2. Trim W1B to match the opening in the doubler
as shown in the photo.
❏ 3. Select a W2B rib and trim it to match W1B.
❏ 4. Insert the aluminum wing tube into the paper
wing tube. Fit the two W1Bs, two W2Bs and four
W3s (including the two with the doublers) to the
paper wing tube. Use your rotary tool to enlarge
the holes in the ribs as necessary. When satisfied
with the fit, remove the ribs from the tubes and set
the tubes aside.
❏ 5. Cut the two 1/8" x 2-1/8" x 14-5/8" birch ply
sheets in half, making four 1/8" x 2-1/8" x 7-5/16"
shear webs.
❏ 6. Sand a taper on the last two inches of the four
1/8" x 3/8" x 18" basswood spar doublers.
❏ 7. Glue the four spar doublers to the four 1/4" x
3/8" x 42" basswood spars with the non-tapered
end of the doublers aligned with one end of each
spar. These assemblies are now known as spars.
❏ 8. Glue the die-cut 1/8" ply forward and rear strut
braces to two of the W5 ribs as shown.
❏ ❏ 9. Cover your right wing panel with Plan
Protector. Cross-pin the bottom spar in place on
the plan, aligning the inboard end with the centerline
of the wing, with the spar doubler facing up.
❏ ❏ 10. Pin the 1/4" x 3/8" x 42" balsa wing jig to
the plans, with the 1/4" edge against the plans.
Notice how the jig is skewed to provide the required
wing twist (washout).
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