5. After the hinges have dried thoroughly, pull on them to make sure they are properly
installed. The hinges will probably feel a little stiff as it is almost impossible to get all of
the glue out of the knuckle joint. Use a fine tipped hypodermic needle and place one (only
one!) drop of acetone on each side of the hinge pin. Move the elevator back and forth a
few times and you will feel it loosen up. Be careful to only use one drop as you don’t want
to weaken the glue joint! Add a drop of penetrating oil to each hinge pin and you will
ensure a smooth operating surface with no binding. Seal the bottom of the hinge gap with
a strip of Ultracote or Blenderm tape. Be sure to fully deflect the control surface when
applying the tape or Ultracote to allow full deflection once the gap is sealed. Repeat this
process for the other stab/elevator assembly.
6. Use your hobby knife to remove the covering from the slot in the bottom of the stab for
the elevator servo horn. You may want to brush a coat of alcohol thinned epoxy along the
edges of the opening to prevent gas/oil from seeping under the covering.
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