25
VMAR CHALLENGER 40ARF TRAINER
TM
R
R
R
R
R
6.4.2
Carefully remove the vertical stabilizer from the
slot in the fuselage without disturbing the masking tape.
In order to glue the vertical stabilizer to the fuselage you
need to have an area of exposed wood along the bottom
edge where the vertical stabilizer is inserted into the slot
in the fuselage. The wood is exposed by removing the
plastic covering from a rectangular shaped strip that lies
just below the masking tape line and along the bottom
edge on both sides of the vertical stabilizer.
R
R
R
R
R
6.4.3
Use a ball point pen to draw a line 3 mm (1/8
in.) below the edges of both pieces of tape.
R
R
R
R
R
6.4.11
Carefully push the vertical stabilizer down into
the slot until it reaches the masking tape guides that you
applied earlier.
R
R
R
R
R
6.4.12
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.
R
R
R
R
R
6.4.13
Use a Triangle or square to align the vertical
stabilizer with respect to the horizontal stabilizer. Try to
get as close to as possible to a 90 degree right angle
between the horizontal and vertical stabilizers. Don't
sweat small discrepancies... Perfection is nice but not
essential!
R
R
R
R
R
6.4.7
Mix up a batch of 30 Minute Epoxy. Make
enough to thoroughly cover the exposed wood areas on
both sides of the vertical stabilizer where you peeled
away the covering.
R
R
R
R
R
6.4.8
Apply 30 Minute Epoxy to the exposed wood
areas along the bottom edge of both sides of the vertical
stabilizer. Also apply epoxy to the bottom edge itself.
R
R
R
R
R
6.4.9
Apply 30 Minute Epoxy into and along the
exposed wood sides of the slot in the top of the fuselage.
R
R
R
R
R
6.4.10
Carefully slide the vertical stabilizer into the slot
in the fuselage. Move it foreward and back and wiggle it
slightly up and down as you slide it into the slot. You want
to thoroughly spread the epoxy and create a good bond
between the fuselage and the vertical stabilizer.
R
R
R
R
R
6.4.5
Peel the covering from the rectangular shaped
cut out strips on either side of the vertical stabilizer and
discard them.
R
R
R
R
R
STEP 6.4 - INSTALLING THE
VERTICAL STABILIZER.
R
R
R
R
R
6.4.1
Precisely apply masking tape to the sides of the
vertical stabilizer where the vertical stabilizer meets the
top of the vertical slot in the fuselage. The masking tape
will serve as an alignment guide for later.
R
R
R
R
R
6.4.14
Use a couple of strips of fresh masking tape
to hold the vertical stabilizer in place while the epoxy
cures. Allow 60 minutes for the epoxy to cure.
R
R
R
R
R
6.4.15
Attach the forward fin part of the vertical
stabilizer to the top of the fuselage with CA glue.
VERTICAL
STABILIZER
MASKING TAPE
BOTTOM EDGE
AGAINST TOP OF
FUSELAGE
FUSELAGE
TOP OF FUSELAGE ALONG SLOT
R
R
R
R
R
6.4.4
Use a light touch with a very sharp hobby knife
to cut the covering along the pen lines. DO NOT CUT
INTO THE WOOD. If you cut into the wood, you will
weaken the stabilizer and this may result in stabilizer
failure in flight.
COVERING "CUT LINE" 3 mm (1/8 in.) BELOW THE EDGE OF TAPE.
LOWER EDGE OF MASKING TAPE
R
R
R
R
R
6.4.6
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.
EXPOSED AREA OF WOOD AFTER
COVERING PEELED AWAY.
LOWER EDGE OF MASKING TAPE
