Control Horn Installation - Horizon Hobby ARF Hangar 9 Manuel D'utilisation

CONTROL HORN INSTALLATION

1. Check the fi t of the clevis to each of the control horns. Use a pin vise
and 1/16-inch (1.5mm) drill bit to enlarge the hole if necessary.
2. Use medium-grit sandpaper to lightly sand the red aileron control
horn where it fi ts into the aileron. Clean the sanded area using a
paper towel and isopropyl alcohol to remove any debris or oils. This
provides the surface texture necessary for the epoxy to bond to.
 Use tape on the painted area to help prevent removing
the exposed portion of the control horn. Remove the
tape once the control horn has been sanded.
3. Remove the aileron from the wing. Set the hinges aside in a safe
location.
4. Test fi t the aileron control horn in the slot in the aileron. It may be
necessary to trim the opening in the aileron to fi t the control horn.
5. Place low-tack tape around the aileron control horn. The tape should
be 1/32-inch (1mm) from the control horn as shown.
Fokker D.VII 30–60cc ARF
6. Check that the horn is 90-degrees to the surface of the aileron. If
not, lightly trim the hole in the aileron to reposition the control horn.
7. Remove the control horn. Mix 10g of 15-minute epoxy. Apply epoxy
to the slot in the aileron. Make sure the epoxy gets into the slot for a
good bond between the aileron and control horn.
8. Apply epoxy to the area of the control horn that fi ts into the slot. Use
enough epoxy so the control horn will be fully bonded to the control
surface.
9. Before the epoxy fully cures, remove the tape from around the
control horn. This will allow the epoxy to fl ow around the control
horn, creating a small fi llet between the control horn and surface for
a fi nished look and secure bond.
10. Insert the rudder control horn in the rudder. The tabs on the horn will
rest against the rudder.
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