Great Planes Spirit 100 Sailplane Kit - GPMA0550 - Manual (Page 16)

measurement at rib W10S. Use a sanding block to carefully sand
the leading edge, spars and trailing edge to achieve vertical
surfaces on each. 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. HINT- Set the
panel on an "elevated" building surface an inch or so above the
work surface and use the edge of the elevated surface to hold the
sanding block perpendicular to the work surface as shown in the
photo.
D D 2. With the inner panel flat on the work surface, sand
the leading edge, spars and trailing edge so they are all even and
of the correct length. both sides of the spars. Use the die-cut C2 clamps (SPT1W22)
to hold everything in place. Wipe o f f any excess glue before it
cures.
D D 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
3-1/2" (at the bottom of rib W10S) with the dihedral gauge. Sand
any ends if needed to make everything fit well.
D D 4. With the dihedral gauge in place, Apply med. or thick
CA or epoxy to the leading edge, trailing edge and spar joints to
"tack glue" the two panels together. Hold everything in place
until the glue has cured.
D D 5. Cut the balsa bottom sheeting away (1/32") from the
front of the inner panel spar to clear the polyhedral brace. The cut
should start at the last W2S rib and continue to the end of the spar.
Punch out two of the 1/32" Die-Cut Ply Polyhedral Braces
(SPT1W10) with an "S" embossed on them and test fit them in
place against the front and back of the spars. Sand them if needed
to achieve a good f i t .
D D 7. Locate the two 1/32" Die-Cut Ply Leading and
Trailing Edge Braces (SPT1W10) that were next to the polyhe-
dral braces you used earlier. Test fit them in place and sand them
if needed to make them fit between the rib W2S and W4S. The
LE brace should be at least 1/16" below the top of the LE to allow
for the 1/16" top sheeting, which will be added later. Glue them
in place with med. or thick CA. If the TE brace extends above or
below the surface of the TE, sand it flush.
D D 8. Install ribs W3SA and W3SB (SPT1W02) between
the inner and outer panels using med. or thick CA. A little sanding
may be necessary to achieve a good fit. Use the rib gauge to tilt
the ribs to the proper angle.
D D 6. When satisfied with the fit, apply a generous bead of
epoxy or med. or thick CA to the spars and install the braces on
D D 9. Drill a 13/64" hole down through the hole in the front
wing bolt plate and through the 1/16" bottom sheeting. Lightly
16