Great Planes Proud Bird ARF - GPMA1260 - Manual (Page 7)

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5. Test fi t the wing panels together with the wing tube. The
root ribs of the wing panels should fi t fl at against each other.
If not, lightly sand them as necessary until they do.
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6. When satisfi ed with the fi t, mix up 1/4 oz [7cc] of 30-minute
epoxy. Coat one half of the wing joiner tube and insert it into
one of the panels. Coat the root rib of both panels and the
exposed halves of the joiner tube and anti-rotation pin. Slide
the wing panels together and wipe away any excess epoxy.
You can tape the wing panels together while the epoxy hardens.
The panels can also be held together with spring clamps at
the root tab. Slide the 4x30mm wing bolts through the wing
bolt holes and wrap rubber bands around them to draw the
aft end of the panels together. Ensure that the edges of the
tabs at the leading edge of the panels are fl ush with each
other. Allow the epoxy to cure undisturbed.
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7. Draw a center line onto the plywood wing bolt plate. Use
a razor saw or hobby knife to make a shallow cut along the
center line. This will allow the plate to bend over the dihedral
angle of the wing.