23
VMAR CHALLENGER 40ARF TRAINER
TM
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6.2.1
Firmly attach the wing to the fuselage using the
four plastic wing bolts. Tighten the bolts snugly but do not
over tighten. Go to the front of the fuselage, centre
yourself and look back across the wing to the horizontal
stabilizer. Check that the wing and the horizontal stabilizer
are parallel to each other.
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6.2.2
Remove the wing and set it aside.
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6.2.3
Precisely apply masking tape to the top of the
horizontal stabilizer where the horizontal stabilizer meets
the sides of the fuselage. The masking tape will serve as
an alignment guide for later.
Carefully align the horizontal stabilizer to match the
masking tape guides that you applied earlier.
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6.2.13
Remove the masking tape and use a paper
towel moistened with a touch of rubbing alcohol to wipe
away any excess epoxy that is oozing out of the joint.
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6.2.14
Check the tip to tip distances and then use a
couple of strips of fresh masking tape to hold the horizon-
tal stabilizer securely in place while the epoxy cures. Allow
60 minutes for the epoxy to cure.
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6.2.9
Mix up a batch of 30 Minute Epoxy. Make enough
to thoroughly cover the exposed wood area where you
peeled away the covering.
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6.2.10
Apply 30 Minute Epoxy to the exposed wood
area on the top of the horizontal stabilizer and beyond the
exposed wood to almost the edges of the tape.
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6.2.11
Apply 30 Minute Epoxy to the top and bottom
faces of the horizontal stabilizer slot. Although we have not
removed covering from the bottom of the stabilizer, apply
some glue to the contact area on the bottom of the stabi-
lizer.
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6.2.12
Carefully slide the horizontal stabilizer into the
slot in the fuselage. Move it foreward and backward and
wiggle slightly side to side as you slide it into the slot. You
want to thoroughly spread the epoxy and create a good
bond between the fuselage and the horizontal stabilizer.
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6.2.7
Peel up the covering from the triangle shaped
cut out area and discard it.
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6.2.6
Use a light touch with a very sharp hobby knife to
cut the covering along the pen lines. DO NOT CUT DOWN
INTO THE WOOD. If you cut into the wood, you will weaken
the stabilizer and this may result in stabilizer failure in flight.
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STEP 6.2 - INSTALLING THE
HORIZONTAL STABILIZER
In order to glue the stabilizer to the fuselage you need to
have an area of exposed wood on the top of the horizontal
stabilizer. The wood is exposed by very carefully remov-
ing the plastic covering from a triangle shaped area that
lies just inside the edge of the tape.
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6.2.5
Use a ball point pen to draw a line 6 mm (1/4
in.) inside the edges of both pieces of tape and
6 mm (1/4 in.) offset from and parallel to the leading and
trailing edges.
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6.2.4
Carefully remove the horizontal stabilizer from
the slot in the fuselage without disturbing the masking
tape.
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6.2.8
Wick thin CA glue around the edge of the cut out
area where the exposed wood meets the remaining
covering. Look carefully for any score lines in the wood
and ensure that you apply CA into any score lines.
APPLY MASKING TAPE TO SERVE AS ALIGNMENT GUIDES
MASKING TAPE
ALIGNMENT
GUIDES
OUTLINE OF CUTOUT AREA
BEFORE COVERING
IS REMOVED
TOP OF HORIZONTAL
STABILIZER
EXPOSED AREA OF
WOOD AFTER
COVERING PEELED
AWAY.
MASKING TAPE
ALIGNMENT GUIDES
