Model Tech SE5a SCOUT Instructions For Final Assembly page 28

Repeat the previous procedures to install the second servo hatch cover assembly into the other half of the wing.
STEP 3: INSTALLING THE AILERON PUSHROD ASSEMBLIES
Working with one servo assembly for now, enlarge the hole in the servo arm that is 9/16" out from the center of the servo
arm, using a 5/64" diameter drill bit.
Connect your radio system and plug the aileron servo into the receiver. Double-check that the aileron trim lever on your
transmitter is centered.
IMPORTANT Verify that the servo arm is still centered. It should be, since you centered it when installing the
servo arm previously.
PRO TIP
Before installing the control horn in the next procedure, drip several drops of thin C/A into the pilot holes
and allow the C/A to fully cure. The C/A will harden the surrounding balsa, making the mounting area stronger.
Install the control horn and backplate, using one M2 x 25mm machine screw and one M2 x 20mm machine screw, being
careful not to overtighten them. The 25mm long machine screw is installed in the front of the control horn.
While holding the servo hatch cover assembly firmly in place,
carefully drill four 1/16" diameter pilot holes into the servo hatch
cover and through the mounting blocks in the wing. Locate
each of the four holes 1/8" in from each corner of the servo
hatch cover.
Secure the servo hatch cover assembly to the wing, using
four M2 x 10mm flange-head wood screws.
Install the Z-Bend in one 1-1/4" long threaded aileron
pushrod wire into the hole that you enlarged. When installing
the pushrod wire, make sure that the long portion of the wire is
toward the outside of the servo arm, as shown.
Position one nylon control horn onto the bottom of the
aileron. When aligned properly, the centerline of the control
horn should be directly behind the aileron pushrod wire and
the clevis attachment holes should be lined up over the hinge
line. The base of the control horn should be parallel to the
aileron hinge line, too.
When satisfied with the alignment, mark and drill 5/64"
diameter pilot holes through the aileron for the control horn
mounting screws.
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