SIG KADET LT-40, Instruction Manual, Page: 26 / 49

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122. Three 5/16"x1/2"x36" balsa sticks are
provided for making the Leading Edge,
Trailing Edge, and End Ribs of the
Stabilizer (plus some parts of the Fin).
Inspect all three of the sticks to
determine which one is the straightest,
and use that one to make the Stabilizer
Trailing Edge. Cut it to 27" long with a
razor saw, and then pin it in place on
the plan, gluing it to the back of the
Stab Center Section at the same time.
(Save the leftover 9" long piece of wood for step 124.)
123.
Use the next straightest 5/16"x1/2"x36" balsa stick to make both Stabilizer
Leading Edges. Cut the ends of the Leading Edges at angles matching the exact
shapes on the plan. Then pin the Leading Edges in place, gluing them to the front
of the Stab L.E. Joiner at the same time. (You should end up with about 6" of
wood leftover for step 124.)
124.
Use the 5/16" x 1/2" balsa pieces leftover from the last two steps to make the
Stabilizer End Ribs. (Do not cut into the third 5/16"x1/2"x36" long balsa stick for
this step - it is for building the Fin later in steps 134, 135, 136, and 138.) Cut the
End Ribs carefully to fit snugly between the leading and trailing edges. Then glue
and pin them in place.
125.
Two 5/16"x5/16"x36" balsa sticks are provided for making the rest of the parts for
the Stabilizer (plus some parts of the Fin). From both sticks, cut the eight 5/16"
Sq. Balsa diagonal ribs required for the Stabilizer. (Be sure to save all the leftover
wood for building the Fin later in step 137.) Work on one rib at a time. Cut the rib
to exact size over the plan, angling the ends to fit well against the leading and
trailing edges. Glue and pin the first rib in place before going on to the next one.
126.
Once the glue is dry, unpin the Stabilizer from the plan and re-glue all the joints
with additional Medium CA. Use just enough glue to completely fill the joint, plus
leave a visible, but small, fillet of glue between the parts. Take your time and
don’t miss any joints! Each and every one of them contributes to the finished
strength of the Stabilizer.
127.
Lay the Stabilizer flat on the building
board and lightly block sand the entire
structure just enough to smooth out all
the glue joints. Do this to both sides of
the Stabilizer.
CAUTION: Do not sand so much that
you thin down the Stabilizer more than
1/32" under its original 5/16" thickness.
128.
Block sand the tip ends of the leading
and trailing edges flush with each End
Rib.
129.
Mark a center-line on the front of the
Stabilizer Leading Edges. Using the
center-line as a guide, carve and sand
the front of the Leading Edges to a
round shape.
NOTE: Leave the End Ribs and Trailing
Edge of the Stabilizer flat and square.
130.
Lay the Stabilizer back on the plan and mark the locations for the Sig Easy Hinges (4 total) on the trailing edge.