22
VMAR CHALLENGER 40ARF TRAINER
TM
TOP
BOTTOM
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STEP 6.1 - PREPARING THE
HORIZONTAL STABILIZER.
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6.1.1
Remove the horizontal
stabilizer
[TH]
with pre-installed
elevator from its shipping bag.
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6.1.2
Locate a control horn
set from the Control Horn Parts
Bag. A control horn set consists of...
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6.1.7
Hold the metal bolt and
bevelled washer in place and
thread the plastic T-nut
[CHN]
onto the threaded end of the
bolt where it protrudes from the
bottom of the elevator. Thread
the narrow end of the T-nut on
first. Use a Phillips screw driver to tighten the bolt and draw
the narrow end of the T-nut into the hole in the elevator. Try
to keep the T aligned fore and aft with respect to the
fuselage. Tighten the bolt snugly so that the wood in the
elevator is slightly compressed. Holding the "T" portion of
the T-nut with a small Crescent wrench helps installation.
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6.1.8
Thread the plastic
control horn
[CHH]
onto the
exposed threaded end of the bolt
that is protruding from the bottom
of the elevator. Screw the control
horn on until the bolt end just
protrudes from the control horn.
Rotate the control horn so that it is "facing" towards the
front.
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6.1.9
Gently move the elevator back and forth by hand a
couple of times. Then move the control horn back and forth
and you should see the elevator move up and down. Work
the elevator back and forth a dozen times to loosen it up.
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6.1.10
Apply masking tape across the elevator ends and
around the tips of the horizontal stabilizer to immobilize the
elevator in a neutral position. This will make setting up the
controls much easier.
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6.1.11
Lie the fuselage on its side. Check the slot in the
fuselage that has been machined near the tail to accommo-
date the horizontal stabilizer. You may find a factory
installed spacer in the slot. This will be a small piece of
wood about 25 mm (1 in.) long. Remove the spacer. It was
installed for shipping purposes and is no longer needed.
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PHASE 6 - INSTALLING THE
HORIZONTAL AND VERTICAL
STABILIZERS
T- NUT
[CHN]
[CHW]
BEVELLED
WASHER
BOLT
[CHB]
CONTROL HORN [CHH]
BOLT
[CHB]
SLOT
TH
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1 Metal bolt
[CHB]
2.5 mm x 25-30 mm
(1 to 1-3/16 in.)
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1 Plastic control horn
[CHH]
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1 Plastic bevelled
washer
[CHW]
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1 Plastic T-nut
[CHN]
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6.1.3
Position the horizontal stabilizer
[TH]
facing
upwards.
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6.1.4
Locate the elevator control horn hole in the
elevator. The hole is located in the elevator about 12 mm
1/2 in.) to the left of the centre of the elevator and about
10 mm (3/8 in.) back from the hinge line.
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6.1.5
Place the plastic bevelled washer
[CHW]
on the
metal bolt
[CHB]
so that the flat side of the bevelled
washer is against the head of the bolt.
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6.1.6
Put the bolt through the hole in the elevator from
the top side of the elevator. The bevelled washer will now
have it's bevelled end facing the hole. The bevel will help
centre the bolt in the hole as you tighten the bolt.
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6.1.12
Trial fit the horizontal
stabilizer into the slot for the
horizontal stabilizer.
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6.1.13
Centre and align the horizontal stabilizer in the
slot so that the distance from the fuselage to the left tip is
the same as the distance from the fuselage to the right tip.
Use your tape measure to confirm the distances.
BEVELLED WASHER
[CHW] FLAT SIDE UP
BOLT [CHB]
FRONT
ELEVATOR
HORIZONTAL
STABILIZER
HINGE LINE
T- NUT [CHN]
FRONT
DISTANCE "LEFT" SAME AS
DISTANCE "RIGHT"
RIGHT
LEFT
