11
30% Ultimate ARF
Control Surfaces
Locate the predrilled hole for the
aileron, elevator, and rudder horns.
Open the hole up with a 9/64” drill.
Locate the 6-32 x 2” flat head
screws, #6 washers, and 6-32 nuts.
Install the 6-32 bolt through the ele-
vator and secure with a flat washer
and nut. Put a drop of CA on the nut
to make sure it does come loose.
Install the horn bracket flush with
the end of the bolt.
All surfaces are drilled to accept
the large hinge points. To ensure the
proper alignment of the hinges, first
apply petroleum jelly to the pivot
points and then put 30-minute epoxy
into the holes drilled in the stab and
the elevator. Put a little on both tips
of the hinge point and insert the
hinge into the stab and elevator
while flexing the surface up and
down and sliding it into place. This
causes the hinge points to rotate into
perfect alignment.
The rudder horn is a 3” long 6-32
threaded rod. Install with a flat
washer and nut on each side. Use Ca
on the nuts. Install two horn brack-
ets on each side. One faces forward
for the rudder, the other faces rear-
ward for the tail wheel. Hinge the
rudder to the fin using the same
method as the elevator hinges.
The ailerons use the same 6-32 x 2”
bolt, washers, and nuts as the eleva-
tors. Install the horn brackets and
hinge all four ailerons using the
same method as the elevators.
