Hangar 9 Piper J-3 Cub 40 ARF - Manual (Page 14)

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 Step 10
Place a clevis retainer onto a clevis. Thread the clevis
onto a 4 3 /
4
" pushrod wire. Remove the backplate
from a control horn, and then attach the clevis to the
control horn.
 Step 11
Position the control horn on the aileron. Use the
pushrod wire as a guide to align the horn to the servo
arm. Position the horn so the holes align with the hinge
line. Use a felt-tipped pen to mark the positions for the
three mounting bolts.
 Step 12
Drill the locations marked in the previous step using
a 3/32" drill bit.
 Step 13
Place a few drops of thin CA into each of the holes to
harden the balsa. Attach the control horn using three
2mm x 20mm screws and the control horn backplate.
Section 3: Servo Installation (Aileron)