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DEHAVILLAND BEAVER 120 ARF
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STEP 6.2 – MOUNT THE VERTICAL
STABILIZER ASSEMBLY.
Locate the rudder control horn assembly in the control horn
parts bag. The rudder control horn assembly consists of a
long bolt assembly consisting of two bolts welded together
at the head, two white plastic T-nuts, two metal nuts and
two white plastic control horns with a hole in the flange end
of the horns.
Remove all parts from the long welded double ended bolt.
Position the bolt through the pre-drilled hole in the rudder
so that the bolt is centered with an equal length protruding
from either side of the rudder. Apply a white plastic T-nut to
each side of the bolt such that the shafts of the T-nuts are
pointing inwards towards each other. Tight the T-nuts so
that the shafts of the T-nuts go into the hole in the rudder.
Use a small crescent wrench to rotate the T-nuts and
tighten the T-nuts until they just begin to seat into the
covering. Ensure that the bolt will now securely move the
rudder with no slack. Now apply the metal nuts to the bolts
and tighten the nuts down and just into the white plastic of
the T-nuts. Apply Pacer Z-42 thread locker to the metal nut.
Install the white plastic control horns to the either ends of
the bolts.
Slide the vertical stabilizer assembly into the vertical
stabilizer slot in the fuselage. Carefully insert the vertical
stabilizer all the way into the slot.
Carefully position masking tape on the vertical stabilizer
assembly so that the bottom edge of the masking tape
marks where the fuselage meets the vertical stabilizer on
both sides of the stabilizer.
Carefully remove the vertical stabilizer assembly from the
slot in the fuselage.
Using a pen, draw a line parallel to and about ¼ inch
beneath the lower edges of the masking tape on both sides
of the vertical stabilizer assembly..
Using a sharp knife, carefully cut along the drawn lines so
that you can peel off the covering material and bare the
wood on either side of the vertical stabilizer assembly that
will be covered by the fuselage tail section. Do not score
the wood. Seal any score lines with Pacer ZAP CA before
proceeding further. If you cut into the wood and do not
subsequently re-glue any score lines, your vertical stabi-
lizer assembly may fail in flight at any time.
Do not glue the vertical stabilizer assembly into place in the
fuselage slot at this time.
Slide the vertical stabilizer assembly into the vertical
stabilizer slot in the fuselage. Carefully insert the vertical
stabilizer assembly all the way into the slot using the
masking tape edges as a guide.
Tape the rudder into the neutral position.
Using the wing as a reference, and looking back along the
fuselage from the front, ensure that the vertical stabilizer
assembly is at right angles with respect to the wing. If
adjustment is required, sand the vertical stabilizer assem-
bly where it engages into the slot in the fuselage. Sand
carefully and check frequently for progress. Do any sand-
ing in small incremental steps, checking the alignment with
respect to the wing frequently.
With the rudder taped into the neutral position and the
vertical stabilizer assembly fully inserted into the vertical
stabilizer slot in the top of the fuselage, adjust the clevises
on the rudder control rods to connect to the rudder control
horns.
Mix up about 2 ounces of Pacer 30 Minute Zpoxy and
thoroughly apply the mixed Zpoxy to the bare wood area
of the vertical stabilizer assembly. Apply the mixed Zpoxy
into the vertical stabilizer slot in the fuselage. Carefully
slide the vertical stabilizer into the slot and push the
vertical stabilizer all the into the slot. Using the wing as a
reference, and looking back along the fuselage from the
front, ensure that the vertical stabilizer assembly is at right
angles with respect to the wing. Wipe away any excess
adhesive immediately. Pin the assembly into place to hold
it securely until the Zpoxy cures. Allow at least 2 hours for
curing and do not fly the model for at least 24 hours.
Remove the masking tape applied earlier.
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