Global Hobby AK-18, Instructions Manual

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6
INSTALLING THE AILERON SERVOS
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6) Locate the two aileron servos, two 12” aile-
ron extensions, one Y-Harness and Dubro heat shrink
tubing that you purchased separately.
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7) Plug the two aileron servos into your radio
receiver and center them both. Make sure the aileron
trim tab on your transmitter is centered as well. In-
stall the rubber isolation grommets and brass collets
onto both servos. The collets should be installed with
the flanges towards the bottom of the servo.
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8) Install a single long servo arm onto each of
the servos. The arms should be mounted 90º to the
centerline of the servos. See figure # 3 below.
Figure # 3
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9) Locate the two precovered aileron servo
hatches. Turn each of the two hatches upside down
(non-covered side) and you will notice precut oval
holes. Using a modeling knife, remove the covering
from over the two holes. These holes are where the
servo arms will exit and actuate the ailerons.
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10) Working on the bottom of one servo hatch
for now, place one servo onto the hatch. The servo
arm should be inserted through the hole and the edge
of the servo mounting tabs should be even with the
edge of the hatch. Notice the hole is angled. Make
sure the servo is parallel to the hole.
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11) Holding the servo in proper alignment on
the bottom of the hatch, temporarily place two of the
8mm x 20mm x 20mm wood blocks in place behind
the servo mounting tabs. See photo # 1 below.
Photo # 1
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12) Using a pencil, carefully outline the loca-
tions of the two wood blocks and the servo onto the
bottom of the servo hatch.
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13) Remove the parts from the hatch. Using
Kwik Bond 5 Minute Epoxy, glue the two wood blocks
into place on the servo hatch. Allow the epoxy to
fully cure before proceeding.
It is very important that you use epoxy in this
situation. C/A glues will not adhere as well to
the hardwoods, and if used, the blocks could break
loose when installing the servo, or worse, during flight.
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14) After the epoxy has cured, place the servo
back onto the hatch. Mark the locations of the four
mounting screws onto the two blocks using a pencil.
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15) Remove the servo and drill 1/16” pilot holes
through the blocks for the servo mounting screws.
Drilling pilot holes into the wood block before
installing the screws will keep the wood from
splitting when the screws are installed.
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16) Place the servo back onto the servo hatch
and secure it in place with the mounting screws. Re-
peat steps # 10 - # 15 to install the second aileron
servo. On the bottom of each hatch place a mark so
you know which one is for the right and which one is
for the left. This will help keep you from mixing
them up.
INSTALLING THE SERVO HATCHES
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17) Turn one wing panel right side up. Using a
modeling knife and a razor saw, remove the portion
of the root rib above the precut servo exit hole and
cut a half circle in the top of the wing to allow the
servo wire to pass up through. See photo # 2 below.
Photo # 2
90º
Servo Arm
Servo
Hatch
Servo
Arm
Mounting
Block
Mounting
Block
Remove From
Top Sheeting
Remove From
Root Rib