Great Planes Spectra Electric Sailplane Kit - GPMA0540 - Manual (Page 15)

JOIN THE INNER AND OUTER WING
PANELS correct angle. Sand any ends if needed to make everything fit
well. The photo for this step is below.
You'll need the following parts:
SPRTW06 1/32" Plywood Polyhedral Braces
SPRTW08 1/8" Plywood Clamps and Gauges
DD 1. Prop up the outer panel 2-5/8" (from the work
surface to the bottom of W10) using the lower notch in the
Dihedral Gauge (from SPRTW08) next to rib W9. The
notches in the dihedral gauge are a tight fit so they will stay
in place once positioned. Use a sanding block to carefully
sand the leading edge, spars and trailing edge to achieve
vertical surfaces on each as shown in the photo. Check your
progress by occasionally setting the panel on the plans to
make sure you are not sanding any "sweep" (forward or
backward tilt) into the wing panel.
DD 4. With the dihedral gauge in place. Apply thick CA
or epoxy to the leading edge, trailing edge and spar joints to
"tack glue" the two panels together. Hold every thing in place
until the glue has cured.
DD 5. Punch out two of the 1/32" Plywood Polyhedral
Braces from the die-cut sheet (SPRTW06) and test fit them
in place against the front and back of the spars. Sand them if
needed to achieve a good fit.
DD 2. With the inner panel flat on the work surface and
your sanding block perpendicular to the work surface, sand
the leading edge, spars and trailing edge (the outer end) so
they are all even and of the correct length.
DD 3. Test fit the inner and outer panels together over
the plan to make sure the leading edges, spars, and trailing
edges all meet up nicely when the tip panel is blocked up the
required 2-5/8" (at the bottom of rib W10) with the lower
notch of the dihedral gauge. The plans show where the
dihedral gauge should be placed (next to W9) to achieve the
DD 6. When satisfied with the fit apply a generous bead
of epoxy or thick CA to the spars and install the braces on both
sides of the spars. Center the braces between the spars and use
the die-cut C2 Clamps (from SPRTW08) to hold everything
in place.
DD 7. Glue the 1/32" Plywood Leading Edge Brace
(from SPRTW06) in place against the leading edges. Align
the brace with the bottom of the leading edge to allow for the
1/16" balsa leading edge sheet which will be applied later.
DD 8. Install ribs W3A and W3B between the inner and
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