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3. Make a 7/16" [11 mm] long mark 1/8" [3 mm] above the
bottom of the hinge line on the left side of the rudder. The
mark should be just behind the bevel on the leading edge of
the rudder.
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4. As you did with the elevator, use a hobby knife to cut
out balsa from the line equal to the thickness of a control
horn tab.
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5. Test fit a control horn in the slot and press a backplate
onto the tab. Trim off the excess tab protruding beyond
the backplate. If the backplate interferes with the fin when
the rudder is deflected, mark the backplate where it needs
to be trimmed. Do not glue the control horn to the rudder
until instructed to do do.
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6. Fit the rudder and fin into place by sliding it into the slot
in the fuselage above the stabilizer. The aft end of the fin fits
into the fuselage just behind the elevator control horn. Use
a pen to mark lines where the fin fits into the fuselage as
well as where it sits on top of the stabilizer.
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7. Trim the covering just inside the lines you drew on the
vertical fin and horizontal stabilizer. Use alcohol to wipe
away the lines from the fin and the top of the stab.
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8. Mix up a batch of 30-minute epoxy. Coat the areas of
wood where you trimmed the covering from the fin as well as
the underside of the fin where it sits on top of the stab. Press
the rudder into place and use clamps to secure it. Wipe away
excess epoxy with denatured alcohol.
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9. Drill two 1/16" [1.6 mm] holes spaced 1/2" [13 mm]
apart on the right side of the fuselage for the rudder pushrod
12
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