Great Planes Cosmic Wind Minnow 60 ARF - GPMA1321 - Manual (Page 10)

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2. Apply 30-minute epoxy to all sides of the wing joiner,
the joiner pocket in both wing panels and the root rib of each
wing panel. Push the wing panels together and hold them in
place with masking tape. Before the glue hardens, set the
wing flat on your bench and measure the dihedral. The
distance from the top of the bench to the center of the wing
as measured at the wing tip should be approximately 2"
[51mm]. Block the wingtip up while the glue hardens.
Note:
Due to production techniques there may be some variance
in the actual dihedral of each model. Our prototypes flew
well with the dihedral anywhere between 1-1/2" and 2-1/2"
[38mm and 64mm].
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3. Set the wing aside allowing the glue to harden.
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4. Place the plywood wing bolt mounting plate in
position on the top of the wing, over the wing bolt holes and
1/4" [6mm] from the trailing edge of the wing. Using a fine
point-felt tip marker, trace the outline of the plate onto the
wing. Use a sharp #11 hobby knife or use the Expert Tip
that follows to cut the covering from the wing along the lines
you have marked. Use care to cut only into the covering
and not into the wood.
HOW TO CUT COVERING FROM BALSA.
Use a soldering iron to cut the covering from the stab. The
tip of the soldering iron doesn’t have to be sharp, but a fine
tip does work best. Allow the iron to heat fully. Use a
straightedge to guide the soldering iron at a rate that will just
melt the covering and not burn into the wood. The hotter the
soldering iron, the faster it must travel to melt a fine cut. Peel
off the covering (see the photo at step 4).
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5. Glue the plywood wing bolt plate to the wing.
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6. From the bottom of the wing, drill through the wing bolt
holes and through the plywood plate with a 1/4" [6mm] drill bit.
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7. Fit the wing to the fuselage with two 1/4-20 x 2" [51mm]
nylon wing bolts.
2" [51mm]
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