Assemble The Tail Section & Landing Gear; Install The Stab, Elevators & Rudder - GREAT PLANES Perfomance Series Sukhoi SU-31 1.60 ARF Instruction Manual

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7. Draw a centerline onto the plywood wing bolt plate as
shown. Position the wing bolt plate over the wing bolt holes
on the underside of the wing and use a felt-tip pen to trace
around it. (Be sure that you center the wing bolt plate over the
holes or it may interfere with the installation of the belly pan.)
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8. Use a sharp #11 hobby knife or use the following
"Expert Tip" to cut the covering 1/16" [1.6mm] inside of the
lines you marked. Use care to cut only in the covering and
not into the wood. Use alcohol to wipe away the lines. Glue
the wing bolt plate in position. Continue the wing bolt holes
through the plate using a 1/4" [6mm] drill bit. Clamp a piece
of scrap wood against the wing bolt plate to prevent tear out
when drilling the holes.
HOW TO CUT COVERING FROM BALSA
Use a soldering iron to cut the covering from the area
beneath the wing bolt plate. The tip of the soldering iron
doesn't have to be sharp, but a fi ne-tip does work best.
Allow the iron to heat fully.
Use a straightedge to guide the soldering iron at a rate that
will just melt the covering and not burn into the wood. The
hotter the soldering iron, the faster it must travel to melt a
fi ne cut. Peel off the covering.
ASSEMBLE THE TAIL SECTION
& LANDING GEAR
Install the Stab, Elevators & Rudder
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1. Just as you did with the ailerons, prepare the hinge
point pockets in the stab and elevators by test fi tting the
hinges and enlarging the holes as necessary.
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2. Locate the stab slots near the aft end of the fuse and
trim away the covering.
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