Flap Hinging - Horizon Hobby HANGAR 9 Aermacchi MB-339 Bedienungsanleitung

21. Apply epoxy to all the surfaces of the control horns that will
contact the exposed wood of the aileron.
22. Fit the assembly into the aileron. Use a paper towel and
isopropyl alcohol to remove any excess epoxy. Allow the
epoxy to cure, then remove the tape.

FLAP HINGING

23. Check the hinges to make sure they operate freely. Adjust the
tension of the screw if any hinges do not move freely. Apply
a small amount of petroleum jelly to the hinge flex points to
help prevent adhesive from entering the hinge.
24. Check the fit of the flap to the wing using the hinges. The
flap will align with the wing root. The hinge gap will be equal
along the length of the flap.
Î Do not apply any adhesives until instructed to do so.
25. Check the operation of the flap to make sure there is
clearance for the flap control horn. Use a rotary tool and
sanding drum if necessary to lightly shape the opening in the
wing for the control horn if necessary.
Aermacchi MB-339
26. Remove the flap and hinges. Inject adhesive into each of the
hinge pockets of the flap.
Î Deluxe Materials Aero Tech Epoxy (DLMAD64) was
used in the construction of the Aermacchi MB-339.
27. Inject adhesive into each of the hinge pockets of the wing.
28. Apply a small amount of adhesive to each hinge where it will
enter the flap and wing.
29. Place the hinges in the flap, then join the flap to the wing.
Check the alignment at the wing root, and that the gap
between the wing and flap is equal the entire length of the
flap. The flap will also align with the bottom of the wing.
Î Trial fitting the aileron at this stage enables an
equal gap between the flap and the aileron.
30. Use a paper towel and isopropyl alcohol to remove any
excess adhesive. Use low-tack tape to hold the flap in
position until the adhesive fully cures.
7 EN