Hangar 9 1/4-Scale J-3 Cub ARF - Manual (Page 21)

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 .  .Step 5
Remove.the.backplate.from.a.control.horn..Attach.the.
clevis.to.the.horn.and.position.the.horn.on.the.elevator.
with.the.holes.in.the.horn.aligned.with.the.elevator..
hinge.line..The.horn.cenerline.will.be.1-inch.(25mm)..
from.the.edge.of.the.stabilizer.to.avoid.interferrence.
between.the.control.linkage.and.mounting.tabs..Use.a..
felt-tipped.pen.to.mark.the.positions.for.the.three.control.
horn.mounting.screws.
Align holes with hinge line
 .  .Step 6
Use.a.5/64-inch.(2mm).drill.to.drill.through.the.elevator.
for.the.control.horn.mounting.screws.
 .  .Step 7
Apply.a.few.drops.of.thin.CA.into.each.of.the.holes.to.
harden.the.surrounding.wood.
 .  .Step 8
Attach.the.control.horn.to.the.elevator.using.three..
2-56.x.5/8-inch.machine.screws.and.the.control..
horn.backplate.
Note:.Once.the.length.of.the.linkage.
has.been.adjusted;.use.threadlock.on.
the.nuts.and.clevises.to.prevent.them.
from.vibrating.loose.in.flight.
Radio Installation