16
SERVO INSTALLATION
INSTALLING THE FUSELAGE SERVOS
q
1) Locate the three servos you intend to use
for the elevator, rudder/steering and throttle controls.
Install the rubber grommets and brass collets onto
the servos. The brass collets should be installed with
the flanges facing the bottom of the servos.
q
2) Position the servos into the preinstalled servo
tray as shown below. Drill 1/16” pilot holes for each
of the mounting screws to prevent the wood from split-
ting. Note the locations of the servos and their output
shafts. This is important. See photo # 23 below.
Photo # 23
PARTS REQUIRED
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{1} Adjustable Servo Connector
THROTTLE CONNECTION
INSTALLING THE SERVO CONNECTOR
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1) Install one adjustable servo connector through
the third hole out from the center of one servo arm.
You may have to enlarge the hole in the servo arm to
accommodate the servo connector. Remove the ex-
cess material from the arm. See figure # 13 below.
Figure # 13
After installing the adjustable servo connector
apply a small drop of Kwik Bond Thin C/A to
the nut. This will prevent the nut from coming loose
during flight.
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2) Plug the throttle servo into the receiver and
turn on the radio system. Check to ensure that the
Photo # 24
PARTS REQUIRED
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{1} 680mm Split Elevator Pushrod Assembly
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{2} Nylon Clevises
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{1} Adjustable Servo Connector Assembly
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{2} Nylon Control Horns w/Backplates
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{4} 2mm x 25mm Machine Screws
INSTALLING THE CONTROL HORNS
q
1) Position one elevator control horn on the bot-
tom of each elevator half. The centerline of each
horn should be 3/4” out from the fuselage sides at
the hinge line. Position the control horns so the cle-
vis attachment holes are directly in-line with the
hinge lines. The control horns should be angled to-
wards the fuselage sides. See figure # 14 below.
ELEVATOR PUSHROD
Figure # 14
throttle servo output shaft is moving in the correct di-
rection. When the throttle stick is moved forward from
idle to full throttle the servo should rotate clockwise.
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3) Slide the adjustable servo connector/servo
arm assembly over the plain end of the throttle push-
rod wire. Position the throttle stick and the throttle
trim at their lowest positions.
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4) Manually push the carburetor barrel fully
closed. Angle the servo arm back about 30º from
center and attach the servo arm to the servo. With the
carburetor barrel fully closed, tighten the set screw in
the adjustable servo connector.
q
5) Remove the excess throttle pushrod wire us-
ing wire cutters and install the servo arm retaining
screw. See photo # 24 below.
Servo
Arm
Set
Screw
Servo
Connector
Washer
Nut
Washer
Control
Horn
Control
Horn
Throttle
Rudder
Elevator
Front
Servo Arm
Pushrod
Wire
Servo Connector
Summary of Contents for AK-18
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