D 8. Trial fit the trailing edge/torque rod assembly onto
the wing trailing edge. Sand the center trailing edge pieces
slightly where they join, for a good fit. The top and bottom
surfaces of these pieces should blend smoothly with the top
and bottom of the wing. Glue these pieces in place with epoxy
(threaded ends pointing DOWN). SUGGESTION: If you
are using 5-minute epoxy, glue only one piece at a time. and
use masking tape to hold it to the wing TE, to aid in correct
positioning.
use a scissors or a paper punch to cut holes in the glass cloth
for the aileron torque rod horns.
D 3. Wrap small pieces of masking tape around the
exposed portions of the aileron torque rods to protect them
from the spray adhesive in the next step.
D 4. Spray a very light mist of 3M "77" Spray Adhesive
on the center section in the area to be glassed. Hold the spray
can at least 12" away from the surface when doing this to
avoid a heavy buildup. The purpose of this is only to give the
wood a little "tackiness". If you apply too much spray it
could result in a poor glue bond.
D 5. Lay the glass cloth in place on the top and bottom of
the wing. Gently press the cloth in place, working out all the
wrinkles. The "77" spray adhesive should hold the cloth
down to the surface, but will permit you to lift and reposition
the cloth if you make a mistake. Don't attempt to wrap the
cloth around the trailing edge.
FIBERGLASS THE CENTER SECTION
NOTE: Because of the high stresses in the center of
this wing, fiberglass reinforcement is REQUIRED.
Please do not omit this important section!
NOTE: If you have previous experience applying
fiberglass, feel free to use your favorite method,
providing that it results in a strong bond between the
glass cloth and the wood. If this is your first time, we
offer the following suggested method, which is the
fastest and easiest we have seen.
D 6. Working outdoors or in a very well-ventilated area
apply thin CA glue to the glass cloth. Begin by running a
bead of glue down the center of the glass cloth strip, then
continue applying the glue in lines until all the cloth has been
secured. Run the thin CA out 1/4" beyond the edges of the
glass cloth to help protect the balsa sheeting when sanding
later. WARNING: This operation produces a larger than
normal quantity of CA fumes, so adequate ventilation is a
must!
D 7. Inspect the surface of the glass cloth. If any areas are
not glued down, apply a couple more drops of CA glue and
press down with a piece of waxed paper until the glue sets.
D 1. Make location marks for the fiberglass reinforce-
ment cloth, 1-1/2" each way from the wing centerline.
NOTE: The cloth will be applied to the top and bottom
surfaces only. Do not apply cloth to the front surface of the
front dihedral brace.
D 8. To make sure the glass cloth is fully "wetted out"
and bonded to the balsa, you may apply more thin CA, a few
drops at a time, and spread it out with a piece of waxed paper.
D 2. Cut the length of 3" glass cloth in half, making two
equal lengths. Trial fit the fiberglass cloth in place. You can
D 9. After the glue has set, trim the excess cloth at the
front of the front dihedral brace and at the trailing edge with
a sharp Xacto knife followed by a sanding block.
D 10. Carefully sand the edges of the glass cloth with a
T-bar sander with 80 or 100-grit sandpaper, smoothly blend-
ing the edges to the wing. Also, lightly sand the surface of the
glass cloth with a piece of fine sandpaper held in your fingers
to remove any rough spots. WARNING: When sanding
fiberglass, wear a dust mask to avoid breathing airborne
glass libers.
D 11. You may now clean up any 3M "77" Overspray with
a tissue dampened with lighter fluid or K&B thinner.
14
Summary of Contents for Super Decathlon 40
Page 4: ...DIE PATTERNS Usethis drawing to help you identify the die cutparts 4...
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