Great Planes Extra 300S 60 Kit - GPMA0236 - Manual (Page 9)

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2. Cut the sheet you have made in half making two
sheets 4-1/2" x 30" stab sheets.
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3. Cut the 1/16" x 3" x 36" balsa sheet into four 9"
sheets. Edge glue two of them together to make two sets of
1/16" x 6" x 9" fin sheets.
❏ 1. Pin the stab LE doubler in position over the plan. Fit
and glue a 3/16" x 3/16" x 14" basswood front stab spar,
to the back of the stab LE doubler. Wipe away excess CA
before it cures.
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2. Test fit the 3/16" x 1-7/8" x 4" balsa stab center in place.
You will need to trim the stab center down for a perfect fit.
When happy with the fit, glue it to the 3/16" stab spar.
❏ 3. Fit and glue the 3/16" x 3/16" x 14" basswood rear
stab spar to the rear of the stab center.
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4. Glue the 3/16" x 1/2" x 30" balsa stab TE in place.
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5. Using two 3/16" x 1/2" x 14" balsa sticks, fit and glue
the LE on the stab. Save the ends of the LE sticks for the
gussets at the outer LE corners.
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6. From a 3/16" x 3/16" x 36" balsa stick, fit and glue the
eight stab ribs in place.
❏ 7. Using the leftover pieces you saved from the LE stick,
fit and glue two tip gussets in place.
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8. Use your bar sander or a large sanding block and
220-grit sandpaper to sand the entire top and bottom
surface of the stab framework until it is flat and even. Be
careful while sanding so you do not over-thin any one
particular area of the stab or gouge the stab cross braces
by snagging the sandpaper on them.
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9. Using medium CA, Glue the stab framework to one
of the stab sheets you made earlier, aligning the sheeting
parallel to the TE of the stab. Give the CA ample time to
cure before lifting the assembly off the work bench.
Note: It is essential to get a very secure and uniform bond
between the stab sheets and the stab core, especially in
the center.
Note: Refrain from using excessive accelerator. Even
hours after it’s sprayed on, residual accelerator can
prematurely and unexpectedly cure the CA you use later
on nearby glue joints. Unless you must handle or remove
the part from your building board right away we
recommend using no accelerator at all.
Build the Stab
1/16" x 3" x 30" balsa sheets
Cut down the middle to make two 4-1/2" sheets.
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