Great Planes Spectra Electric Sailplane Kit - GPMA0540 - Manual (Page 18)

D 14. Press the sheeting into place and trim it flush with
the back edge of the spar using a modeling knife and straight-
edge.
D 15. Lift the sheeting up and apply a bead of thick CA
along the top spar and the second W1A rib. Quickly press the
sheeting down into place and hold until the glue has cured. A
straight strip of wood the length of the panel can be a big help
when trying to hold the sheeting down evenly.
D 16. Apply a small bead of thin CA between the pieces of
masking tape along the leading edge. When all of the glue has
cured, remove the tape, flip the wing over and securely glue
the sheeting to the ribs and the leading edge using thin CA.
The photo for this step is at the top of the next column.
D 17. Use the remaining 1/16" balsa sheeting to sheet the
top inboard center section out past rib W1B as shown in the
photo. Thick CA should be used for this step. Glue the first
piece near the spars, and add the final piece near the trailing
edge. Sand the sheeting flush with the W1A and W1B ribs at
the wing root.
D 18. If you built a two-piece wing, trial fit the two wing
halves together using the plywood wing joiner. Sand the root
of each panel if necessary to achieve a nice fitting joint
between the two wings. If there are large gaps, glue a scrap
piece of 1/16" balsa to the root of each panel and sand it to fill
the gap.
LEFT WING
PANEL
RIGHT WING
PANEL
Tapered
T.E.
1/16" Ply
Wing Protectors
D 19. Sand three edges (two short and one long edge) of
each 1/16" Plywood Wing Protector (SPRTW18) to a taper
18