8
PARTS REQUIRED
WING ASSEMBLY
INSTALLING THE DIHEDRAL BRACE
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1) Look at the surface of each root rib on both
wing halves. Notice how the excess covering mate-
rial overlaps onto them. Using a modeling knife,
carefully trim the covering from both of the root ribs,
leaving about 1/16” of covering overlapping so it does
not pull away. See photo # 1 below.
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{1} Left Wing Half w/Aileron & Hinges
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{1} Right Wing Half w/Aileron & Hinges
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{1} Plywood Dihedral Brace W-3
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{1} Precovered Plywood Wing Doubler
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Photo # 1
Removing most of the covering from the two
root ribs will expose more of the wood. This
will result in a stronger joint when the wing halves
are glued together later.
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2) Using a ruler and a pen, locate and mark the
centerline of the plywood dihedral brace W-3. Draw
one vertical line, on each side, at this location. See
photo # 2 below.
Photo # 2
The dihedral brace is cut in the shape of a "V".
The "V" shape should face the top surface of
the wing when the brace is installed. The top surface
of the wing is the curved surface.
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4) Test fit both of the wing halves together with
the dihedral brace temporarily installed. Do not glue
the two halves together yet! The wing halves should
fit together tight with little or no gaps in the center
section joint. If the center section joint is not tight,
remove the wing halves and lightly sand the edges
and tips of the dihedral brace. Test fit the wing halves
together with the dihedral brace installed again. Re-
peat this step until you are satisfied with the fit of the
wing halves and the dihedral brace.
It is important that the wing halves fit together
properly. The better the fit, the stronger the cen-
ter section joint will be.
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5) When satisfied with the fit of the wing halves,
remove the wing halves and the dihedral brace.
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6) Mix a generous amount of Kwik Bond 30
Minute Epoxy. Working with only one wing half for
now, apply a thin layer of epoxy inside the plywood
dihedral brace box and to only half of the dihedral brace.
Make sure to cover the top and bottom, as well as the
sides, and use enough epoxy to fill any gaps.
Mix equal amounts of epoxy for about 1 minute.
This will ensure both parts are thoroughly in-
corporated together.
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7) Slide the dihedral brace into the plywood box
up to the centerline. Remove any excess epoxy be-
fore it dries using a paper towel and rubbing alcohol.
Allow the epoxy to cure before proceeding.
Photo # 3
JOINING THE WING HALVES
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8) Once the epoxy has cured, trial fit both wing
halves together to double check that the wing halves
still fit correctly.
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3) Test fit the plywood dihedral brace into the
plywood dihedral brace box in each wing half. The
brace should slide into each wing half up to the cen-
terline. If it does not, remove the brace and lightly
sand the edges and tips until the proper fit is obtained.
See photo # 3 at top right.
