Before performing steps 2 and 3, have denatured
alcohol and some paper towel pieces ready for
epoxy cleanup.
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2. Make note how deep the hinge points fit into
the hinge pockets. Epoxy will be applied to the hinges
only on the portion that fits into the pockets. Remove
the flap from the wing panel and pull the hinge points
from the pockets. Coat the center of each hinge point
with petroleum jelly or oil. This will prevent epoxy
from sticking to the pivoting portion of the hinges and
will keep the hinges moving smoothly. Mix up a batch
of 30-minute epoxy. Use a toothpick or something
similar to coat the insides of the hinge point pockets
in the flap and the wing panel. Wipe away any excess
epoxy from around the pockets using a paper towel
dampened with alcohol.
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3. Coat the portion of each hinge point that fits
into the hinge pockets with epoxy. Insert the hinges
into the pockets in the flap and wing as was done in
step 1. Use a paper towel dampened with denatured
alcohol to clean up any epoxy. Work the flap up and
down to ensure it moves freely. Look at the flap from
the root rib and confirm that when the flap is all the
way in the
up
position, the top of the flap follows the
airfoil contour of the top of the wing. Also, confirm
that the flap is flush with the TE of the wing. Make
any small adjustments to the hinges as necessary.
When satisfied, set the wing aside and let the epoxy
cure undisturbed.
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4. Cut the included 2” x 9” [51mm x 229mm]
piece of CA hinge material into 3/4” x 1” [19mm x
25mm] individual hinges. Use a hobby knife or
scissors to trim the corners from each hinge to make
them easier to insert into the hinge slots.
Drill a 3/32" [2.4mm] hole
1/2" [13mm] deep, in the center
of the hinge slot.
Cut the covering
away from the slot.
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5. Drill a 3/32” [2.4mm] hole 1/2” [13mm] deep
in the center of each hinge slot in the wing panel and
aileron
. Use a sharp hobby knife to carefully cut away
the covering just around each hinge slot in the wing.
8