7
Any epoxy that squeezes out can be wiped away with a paper
towel dampened with denatured alcohol. Use a few clamps
to hold the pieces together while the epoxy hardens.
Note:
Make sure the pieces are carefully aligned with each other!
❏
2. Test fi t the wing joiners into the wing sections. The
larger end of each joiner fi ts into the wing center section. You
may need to make adjustments to the joiners for them to fi t
properly.
NOTE:
If you need to sand the joiners some to fi t,
remove only small amounts of material at a time while testing
the fi t frequently. Do not over-sand the joiners, resulting in a
loose fi t. When satisfi ed with the fi t of the joiners in the wing
sections, slide the outer wing sections on and confi rm the
panel ends mate up fl ush. Make adjustments to the ribs by
sanding them fl at if the panels do not mate up fl ush.
❏
3. Remove the outer wing sections and glue a nylon anti-
rotation pin into each hole at the ends of the center wing
section. Test fi t the outer panels to the center section again
to confi rm the anti-rotation pins fi t properly into the holes
in the outer panels. If necessary, make adjustments to the
holes so they fi t.
❏
4. It is not necessary to permanently epoxy the outer
panels to the center section. All of our test fl ying was done
with the outer panels attached to center section with regular,
clear offi ce tape. This allows the outer panels to be removed
from the center section for easier transport and storage. At
this time you can remove the outer panels and wing joiners
and set them aside until it is time to balance the plane. Only
the center section is needed to continue assembly.
❏
5. Align the wing bolt plate on the top of the wing over the
wing bolt hole. Use a fi ne, felt-tip pen to trace around the
plate onto the wing. Remove the plate and follow the
Expert
Tip
below or use a sharp hobby knife with a straightedge to
remove the covering within the lines. If using a hobby knife
to cut the covering, take great care not to cut into the wood.
Cutting into the wood will weaken the wing in that area.
EXPERT TIP
How to cut covering from balsa.
Rather than using a hobby knife which could inadvertently
cut into the balsa, use a heated soldering iron. Move the
iron at a pace that will just melt the covering without burning
into the wood–the hotter the soldering iron, the faster you
will have to move it. A sharp tip isn’t necessary, but a fi ne-
point does work best.
