GREAT PLANES Super Stearman Instruction Manual page 8

2. A string is taped inside the servo bay. Carefully
remove the string from the servo bay and tape it to the
outside of the wing to prevent it from dropping back into the
wing. The other end of the string is taped to the root rib.
Remove the tape, thread the string through the small holes
you cut the covering from on the bottom of the wing and
tape the string to the wing.
3. Repeat steps 1 and 2 for the left bottom wing.
If you are installing servos in the top wing, proceed with
steps 4 and 5. If not, skip ahead to step 6.
4. Starting with the right wing panel for the top wing,
cut away the covering from the servo opening on the bottom
of the wing and the covering from the hole at the root of the
wing. Remove the tape from the root rib, thread the string
through the hole and tape the string to the wing. Tape the
string in the servo bay to the wing, too.
5. Repeat step 4 for the left wing.
6. Locate three 1/8" [3mm] straight plywood wing joiners
and three 1/8" [3mm] plywood wing joiners that are angled.
Using 6-minute epoxy, glue the straight ones together to form
one 3/8" [10mm] joiner and glue the three angled ones
together forming the 3/8" [10mm] angled wing joiner.
7. After the glue has cured, test fit the angled joiner into
the bottom wing panels and the straight joiner into the top
wing panels. Sand the joiners as needed to get a good fit.
8. When you are satisfied with the fit of the joiners, glue
the angled joiner into the bottom wing panels with
30-minute epoxy. Be sure that the top of the joiner is
towards the top of the wing. When gluing the wing panels
together be sure to get glue into the joiner pockets in the
wing. This can be done by applying the glue into the pocket
with a small stick. Apply glue to the pocket, the joiner and
the root rib of the wing.
Before the glue cures, set one wing half flat on your bench.
Insert the 1/2" x1/2" x 3" [13 x 13 x 75mm] balsa block under
the trailing edge of the wing that sits flat on the workbench.
Block up the wing tip of the other wing half with the 2-1/16" x
2-1/16" x 2-1/16" [52 x 52 x 52mm] balsa block included in the
kit. Put small weights on the wing half that is flat on the bench
to keep it lying flat and leave the block under the wing tip of the
other wing half while the glue cures.
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