Instruction manual

❍ 7. Glue the two 8mm square x 38mm aileron servo tray
mounting blocks that you cut to shape earlier to the aileron
servo tray. Be sure that you glue the flat side of the blocks
to the aileron servo mounting tray.
❍ 8. Place the servo into this assembly and test fit this into
location in the center of the wing. Mark the location of the
mounting blocks with a felt tipped pen.
Use a sharp #11 blade to cut the covering from the wing
for the aileron servo mount. Be extremely careful to cut
only the covering and do not cut into the balsa wood under
the covering.
Be sure to allow room for the aileron servo lead. If
necessary, cut away a small area for the lead to exit the
wing as shown. Glue the servo mount to the wing with 6-
minute epoxy.
❍ 9. Assemble the servo using the four servo grommets
and four brass eyelets as shown in the sketch above. Insert
the servo into the mount and mark the location for the 4
screws. Remove the servo and drill 1/16” [1.6mm] holes
through the servo mount for the servo mounting screws.
Run the servo mounting screws into the mount and then
remove them, which will make threads in the wooden servo
mount. Add a drop of thin CA to the holes and allow to fully
harden, thus hardening the threads for more strength.
Note: Do not apply the thin CA with the servo in place as
you will glue it to the mount. Mount the aileron servo using
the servo mounting screws.
❍ 10. Thread the nylon torque rod horns onto both
aileron torque rods until the top of the horn is even with the
top of the torque rod as shown in the photograph.
❍ 11. Make a two-arm servo arm by cutting two arms off
a four-arm servo arm. Enlarge the outer holes in the arm
with a Hobbico Servo Horn Drill (or a #48 or 5/64” [2mm]
drill bit).
How to cut covering from balsa.
To avoid cutting into the balsa, use a soldering iron
instead of a hobby knife to cut the covering from the stab.
The tip of the soldering iron doesn’t have to be sharp, but
a fine tip does work best. Allow the iron to heat fully. Use
a straightedge to guide the soldering iron at a rate that will
just melt the covering and not burn into the wood. Going
too slowly burns into the wood and weakens it. The hotter
the soldering iron, the faster it must travel to melt a fine
cut. Peel off the covering.
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