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1. Locate the hardwood wing joiner. Notice that the joiner
is cut with a double taper. Test fit the joiner into both wing
halves to see exactly how it fits into the wing, making sure
that it is not too tight. Sand the joiner as needed to get a
good fit.
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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 cures, 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 6"
[152mm]. Block the wingtip up while the glue cures.
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 5-3/4" and 6-1/2"
[146mm and 165mm].
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3. Set the wing aside allowing the glue to cure.
❏
4. Place the plywood wing bolt mounting plate in
position on the bottom of the wing, over the wing bolt holes.
Using a fine 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.
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5. Glue the plywood wing bolt plate to the wing.
❏
6. Fit the wing to the fuselage with two 1/4 - 20 nylon
wing bolts.
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.
HOW TO CUT COVERING FROM BALSA
Join the Wings
10
Summary of Contents for Little Toni ARF
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