Great Planes Giant Extra 330L Kit - GPMA0250 - Manual (Page 39)

❏ 1. Position and glue the die-cut 1/8" ply formers TD4,TD3
and TD2 vertically against the trailing edge of formers F9,
F8 and F7 respectively, centering the parts side-to-side.
❏ 2. Position and glue the die-cut 1/8" ply fin plate (FP) flush
against the trailing edge of TD4 and centered side-to-side.
❏ 3. Measure 3-3/4" forward of the leading edge of TD2 and
make marks on both of the inner box longerons at that
location. This will be the trailing edge of TD1.
❏ 4. Select one of the 1/8" x 1/4" x 26" balsa sticks left over
from the front deck. Position and glue this turtle deck
center stringer into the notches in TD4 then, TD3 and then,
TD2, leaving the excess overhanging past TD2. NOTE: Be
careful to keep the formers vertical.
❏ 5. Position the die-cut 1/8" ply turtle deck former TD1 in
place, centering it side-to-side and positioning its trailing
edge at the marks you made in step 3. Angle the former
back until the center stringer locks nicely into the notch in
TD1. Glue TD1 to the center stringer, center box longerons
and outer shell stringers.
❏ 6. Using the remaining five 26" long balsa sticks and one
1/8" x 1/4" x 36" balsa stick, position and glue the six turtle
deck outer stringers into position in the notches in the
turtle deck formers. Trim all 7 stringers flush with the leading
edge of TD1 and the trailing edge of TD4.
❏ 7. Using two 1/8" x 1/8" x 36" balsa sticks, fit and glue two
turtle deck gluing stringers in the bottom notches of the
formers. Trim the excess flush with the leading edge of TD1
and the trailing edge of TD4. NOTE: Be sure the gluing
stringer is tight in the notches and not flush with the outer
shell stringers or your sheeting won’t fit properly.
❏ 8. Draw a centerline down the length of the fin plate.
Temporarily position the fin in place, first aligning the fin
post centered onto the trailing edge of the fuse, and then
aligning the leading edge of the fin on the centerline you
just drew.
Build the Turtle Deck
39