Great Planes Extra 300S 60 Kit - GPMA0236 - Manual (Page 14)

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14. Carefully lift the sheeting away from the ribs, then
apply a bead of medium or thick CA to the top of each rib
and the sub LE. Working quickly, pull the sheeting forward
as you press it down to the ribs and the sub LE. Use
weights to hold the sheeting to the ribs and sub LE until the
CA cures. Note: It may be necessary to place weights on
the TE of the wing so that the TE of the wing stays down on
the jig tabs.
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1. From a 1/16" x 3" x 36" balsa sheet, cut three 10-1/2"
long sheets. From another 1/16" x 3" x 36" sheet, cut one
more 10-1/2" long sheet. Save the remaining 25-1/2" for
step #3.
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2. Cut a curve on the end of one of the sheets, using the
plan as a guide. The curve does not have to be an exact
match. Use that one as a template to mark and cut the
three other sheets. These are the forward center sheets.
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3. From a leftover piece of 1/16" x 3" x 25-1/2" balsa
sheet, cut three 7" long sheets. From a 1/16" x 3" x 36"
balsa sheet, cut five 7" long sheets. These eight 7" pieces
are used for the rest of the center sheeting.
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4. Fit and glue one of the four forward center sheets
(from step 2) in place on the wing.
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5. Glue the 7" balsa middle center sheet in place.
❏ ❏ 6. Using a 7" balsa sheet, fit and glue the rear center
sheet in place.
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1. Glue the die-cut 1/8" ply aileron servo tray (6A) to
the spar and rib with medium CA.
❏ ❏ 2. Glue the die-cut 1/8" ply servo mount support
(6B) in place.
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3. Glue the die-cut 3/32" balsa sub rib (6C) in place.
Servo Mount
Sheet the Center Section
14