18
INSTALLING THE
RUDDER CONTROL HORN
❑
1)
Insert the Z-bend in the 1.5mm x 385mm push-
rod wire, into the third hole out from the base of the nylon
control horn. Orientate the pushrod wire so that the longer
portion of the wire is on the left side of the control horn.
See photo # 24 below.
Photo # 24
❑
2)
Using a modeling knife, remove the covering
from over the rudder pushrod exit hole in the back of the
fuselage. The hole is located on the left side of the fuse-
lage, 1-3/4" in front of the rudder hinge line and 5/8" down
from the bottom of the horizontal stabilizer.
❑
3)
Carefully insert the plain end of the rudder push-
rod wire (with the control horn still attached) into the hole
in the left side of the fuselage. Slide the wire in until the
control horn lines up with the rudder hinge line.
❑
4)
To properly align the control horn, it should be
perpendicular to the rudder hinge line and its centerline
should be 5/8" up from the bottom of the rudder, at the
hinge line. The clevis attachment holes should be located
directly over the hinge line. See figure # 8 below.
Figure # 8
❑
5)
When satisfied with the alignment, use a drill with
a 5/64" drill bit and the control horn as a guide, and drill the
two mounting holes through the rudder.
❑
6)
Slide the control horn back into place and re-
align it. Push two 2mm x 12mm machine screws into
the base of the control horn and through the rudder.
❑
7)
Place the nylon backplate onto the machine
screws, aligning the two holes in the backplate with the
two screws. Using a # 1 phillips screwdriver, evenly
Photo # 25
❑
8)
Locate one plastic "4-point" servo horn that came
with your servo. One of the arms should have at least
four holes in it.
❑
9)
Using a pair of wire cutters, carefully remove all
of the arms except one with four holes in it.
❑
10) Using a drill with a 5/64" drill bit, enlarge the
third hole out from the center of the arm.
❑
11)
Install one adjustable servo connector through
the hole that you enlarged. When you thread on the nut,
don't tighten it completely. You don't want the connector
loose, but you do want it to be able to rotate without bind-
ing too much. See photo # 26 below.
Photo # 26
☛
If your servo arm is thinner than standard sized arms,
we recommend that you install a thin washer between the
servo arm and the adjustable servo connector nut. This
will prevent slop between the arm and the connector.
❑
12) Apply a couple of small drops of Kwik Bond
Thin C/A to the connector nut and allow the C/A to fully
dry. The C/A will lock the nut in place and will prevent
the connector from loosening during flight.
tighten both machine screws to draw the backplate into
place. Be careful not to overtighten the screws. You don't
want to crush the wood. See photo # 25 below.
INSTALLING THE
ADJUSTABLE SERVO CONNECTOR