Great Planes Old Timer 40 Kit - GPMA0495 - Manual (Page 10)

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6. After the wood strips have dried, remove the pins
holding the strips in position. The strips should closely hold
the shape of the stabilizer.
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7. Use CA to glue the first strip to the front of the
stabilizer center, the end of the stab TE and elevator LE and
the rudder root.
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8. Apply a bead of aliphatic resin to the next strip. Spread
the glue out and position the strip against the first strip.
Apply glue to the rest of the strips and pin them in position.
Use T-pins to hold the strips tight against each other. Wipe
off any excess glue before it dries. Glue all ten strips
together, five on each side of the stab/elevator.
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1. From the 1/8" x 1/4" x 30" [3.2mm x 6.4mm x 762mm]
balsa stick, cut and glue stab and elevator ribs as shown
on the plan.
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2. After the glue has cured, unpin the stab/elevator from
your building board. Inspect all the glue joints and re-glue if
necessary. Use a bar sander or a large sanding block and
220-grit sandpaper to sand the entire top and bottom
surface of the stab/elevator flat and even. Be careful while
sanding so that you do not over-thin any one particular area
of the stab/elevator or gouge the ribs by snagging the
sandpaper on them.
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3. Round all edges of the stab and elevator to the shape
shown on the cross-section on the plan. Hint: Once you
have the stab and elevator completely sanded, use a piece
of tape to mark the bottom of the stab and elevator to
ensure proper assembly later.
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4. Cut the stab outer frame between the elevator LE and
the stab TE. Separate the stab from the elevator. Sand the
outer frame flush with the LE and TE.
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5. Mark and cut the slot for the fin tail post to pass
through the stab TE.
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1. Cover the fin/rudder plan with wax paper or Great
Planes Plan Protector so glue will not adhere.
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2. Glue the two die-cut 1/8" [3.2mm] balsa fin bases
together to make a 1/4" thick base. Pin the fin base in
position over the plan.
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3. From the 1/4" x 1/2" x 30" [6.4mm x 12.7mm x 762mm]
balsa stick, cut and glue the fin TE to the fin base.
Build the Fin & Rudder
Finish the Stabilizer & Elevator
10