10
VMAR CHALLENGER 40ARF TRAINER
TM
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2.2.21
Place the wing right way up in the wing saddle
area of the fuselage. Place the four wing bolts into the
wing bolt holes in the top of the wing and make sure you
can screw them down into the wing bolt mounting blocks
in the fuselage.
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2.2.22
Unscrew the wing bolts from the fuselage
blocks and remove the wing from the fuselage.
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2.3.1
Before gluing the wing halves together, dry
assemble everything as outlined in the preceding step. It
is critical that you dry assemble the wing halves before
you begin to use epoxy. Remember, you've got one
chance to get it right! Be careful and get things straight
the first time! If you have not dry assembled the wing as
outlined in the previous steps, stop now and go back and
do the dry assembly before proceeding beyond this step.
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2.3.2
After you have done the dry assembly and test
bolted the wing to the fuselage to confirm that everything
fits together, it is time to disassemble the dry assembled
wing. Carefully remove the masking tape and pull the wing
halves apart. Use short rocking and gentle twisting
motions when pulling the wings slightly apart.
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STEP 2.3 - GLUING THE WING HALVES
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2.3.8
Using a disposable mixing dish and stir sticks,
thoroughly mix up a batch of 30 Minute Epoxy according
to the instructions that came with the epoxy.
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2.3.9
Using a disposable epoxy brush, apply the 30
Minute Epoxy liberally to all sides of one end half of the
wing spar joiner
[WJS
] and use the joiner to work the 30
Minute Epoxy into both of the wing spar joint cavities.
Apply more epoxy to the one end of the wing spar joiner
as you work epoxy into the second wing spar joint cavity.
It is important to work 30 Minutes Epoxy into the wing spar
joint cavities of the left and right wings. Don't scrimp on
the epoxy! Use lots.
USE 30 MINUTE EPOXY!
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STEP 2.2 - DRY ASSEMBLY OF THE
WING HALVES cont'd.
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2.3.3
Use a pencil to carefully mark both wing roots
with an arrow pointing up and check that you have previ-
ously marked both faces of the wing spar joiner with an
arrow pointing up so that the wing can be easily reassem-
bled correctly.
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2.3.4
Completely separate the wing halves and remove
the two short wing alignment dowels and the wing spar
joiner. Set the dowels and joiner aside for now.
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1 Wing spar
joiner
[WJS]
made of wood
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2 Wing joint
dowels
[WJD]
25 mm (1 in.)
long, wood
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1 Small roll of
wing joint tape
[WJTW],
white
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1 Small roll of wing joint tape
[WJTY],
yellow
]
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2.3.5
To assemble and glue the wing you will need the
two wing halves
[WR]
and
[WL]
and the following items
from the Wing Parts Bag.
Use 30 Minute Epoxy to glue the wing together. Use
only epoxy with a cure time of 30 minutes. Faster
cure time epoxy will not allow you time to correctly
position the parts before it begins to cure. 30 Minute
Epoxy also provides a stronger bond than faster cure
epoxy and you want the strongest bond you can get.
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2.3.6
You will also need the following items that are not
included with your Challenger.
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30 Minute Epoxy parts A and B
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Sandpaper (Coarse 240 grit recommended)
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Epoxy brush and
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Stir sticks
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Disposable mixing dish for the epoxy
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Paper towels
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Rubbing alcohol
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Hobby knife
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Masking tape.
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2.3.7
Using coarse sandpaper, lightly sand all sides of
the wing spar joiner, the wing alignment dowels and the
faces of both wing roots.
WING
FUSELAGE
