SIG CAP 231EX, Assembly Manual, Page: 17 / 26

stabilizer yet.
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21) Bolt the wing back in place to the fuselage. The horizontal
stabilizer is now glued in place. Use only slow-cure epoxy
for this step. First set the airplane on your flat work surface
and prop the tail up to about level.
Apply glue to the
fuselage stab saddle and position the stab squarely in place
- use a weight to secure it. View the airplane from the top,
front and rear, making sure the stab is square, without
leaning one way or the other. Use a ruler to measure from
the outer trailing edge wingtip back to the stab's leading
edge tip and note the measurement and repeat this process
on the opposite side. The two measurements should be the
same. Make adjustments as needed. Tape and/or weight
the stab firmly in place to the fuselage, wipe off any excess
glue with alcohol and allow the glue to set. Remove the
wing from the fuselage.
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22) Locate the molded plastic fuselage/fin fairing. Fit the fairing
in place onto the fuselage, over the stabilizer and around
the fin to check the fit. Trim as need to seat the fairing
squarely in place, in contact with the fuselage, top of the
stabilizer and the fin. Once satisfied with the fit, mark the
location of this fairing onto the fuselage, stab and fin with a
pencil - remove the fairing. Use a sharp #11 blade to cut
away the covering just inside of the outlines just made,
exposing the wood. Apply a coat of epoxy glue to the inside
of the fairing where it will contact these areas.
Fit the
fairing, pressing it firmly in place to make sure it contacts all
gluing areas. Clean up any excess glue with alcohol and
use tape to secure the faring in place. Allow the glue to
cure.
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23) Apply petroleum jelly to the elevator hinge knuckles and
apply epoxy to the exposed hinge halves. Attach the left
and right elevator halves to the stabilizer, wiping off any
excess glue from the hinge line. Tape the elevator halves
to the stabilizer in the neutral position and allow the glue to
cure.
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24) From the kit contents, locate the two 4-40 x 2-1/8" elevator
control rods, two 4-40 solder clevises, two 4-40 threaded
R/C links and two 4-40 hex nuts.
Make two elevator
pushrod assemblies by soldering a solder clevis onto the
unthreaded ends of the pushrods. Thread a hex nut onto
the threaded ends, followed by an R/C link.
❑
25) From the kit contents, locate a right and left nylon elevator
horn and four #4 x 3/8" sheet metal screws. Remove the
wing from the airplane and turn the fuselage upside down
on your bench. The elevator horns are now installed onto
the bottoms of the elevator halves. As mentioned, there are
plywood mounting pads in the elevator halves, inset in their
forward, inboard leading edges. Hold the horn in place on
the elevator, lined up with the elevator servo output arm,
with the holes in the horn directly over the elevator/stab
hinge line. Mark the horn mounting holes with a felt pen.
Pre-drill the hole locations with a 3/32" dia. bit. Mount the
horn in place with two #4 x 3/8" screws.
Repeat this
procedure on the opposite elevator half.
Use your radio to center the elevator servos and then mount
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