Great Planes Giant Extra 330L Kit - GPMA0250 - Manual (Page 35)

of F9 and with the very trailing edge corner flush against the
top of the bottom inner box longeron. Carefully position and
glue the stringer flush with the outer edge of F8, NOT
touching the trusses. Glue the stringer into the notches in
the remaining formers and cut the excess off flush with SF1.
❏ ❏ 5. Locate the die-cut 1/8" ply SF7 former. Position the
lower corner flush with the trailing edge of SF6 and with the
outer edge flush with the outer edge of the lower stringer.
Gently slide the upper end of SF7 forward until it contacts the
inner box longeron and the outer stringer, being careful not to
bow SF7. Glue it in place to the stringer, SF7 and longeron.
❏ ❏ 6. Splice two 1/8" x 1/4" x 30" basswood sticks, making
a 60" long right side outer shell center longeron. Position
and glue the center longeron into the notches in the formers.
❏ ❏ 7. Use a razor plane to shape the lower outer stringer
from SF6 forward to SF1, matching the shape shown on the
cross sections.
❏ 8. Repeat steps 2-7 for the left side of the fuse.
❏ ❏ 1. Edge glue two 3/32" x 3" x 36" sheets, making a 6"
wide outer shell lower sheet.
❏ ❏ 2. Press one pin into the center of the right side outer
shell center longeron at formers SF1, SF4 and SF7. NOTE:
The pins are just to locate sheeting and should not be
pressed deeply into the bass longeron.
❏ ❏ 3. Position the outer shell lower sheet 1/4" behind the
aft most point of SF7 and sitting on the pins, pressed tight
against the longeron. (Leave the excess overhanging SF1
for now.) Glue the sheet to the longeron.
❏ ❏ 4.Trim the sheeting extending 1/4" behind the TE of SF7.
❏ ❏ 5. Taking your time, use medium CA to glue the sheeting
to formers SF1 through SF7, and to the lower stringer. HINT:
You may want to spray the outside of the sheet with a
water/ammonia mix to help it bend without cracking.
❏ ❏ 6. Trim the sheeting flush with the LE of SF1 and the
bottom of the outer shell lower stringer.
DESIGNER’S NOTE: The sheeting on this fuselage is
intentionally designed to provide your model with a scale
appearance as well as exceptional strength in critical
areas. The full size Extra has a mixed composite and
cloth skin: the fuselage is skinned in composite from just
behind the cockpit back all the way forward to the cowl;
the rear portion of the fuselage is covered in fabric. This
model is sheeted where the full scale model is composite
skinned, and is open structure to be covered in MonoKote
for the optimum scale appearance behind the cockpit.
Sheeting the Fuselage
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