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Copyright 2005 Laser Arts
16.
Use pins every other bay, through the rear of the bottom spar to make sure the bottom spar is flat against the building board.
17.
Glue 4 of the triangle gussets (2 on each wing) to the trailing edge and ribs where shown on the plans.
18.
Glue in the all of the front shear webs and rear shear webs (where there are no pins) into place as shown in the image below. The
thinner webs go in the front and the wider webs go in the rear. The engraved numbers on the webs will always be facing towards
you. Shear webs labeled “1” go between ribs marked “1”, shear web “2” goes between the last rib “1” and rib 2, shear web “3”
goes between ribs 2 and 3, shear web “4” goes between ribs 3 and 4, etc.
19.
Remove the pins holding the spar down and glue in the remaining shear webs.
20.
Sand or trim the front shear webs to make sure they are flush with the top spar. This makes sure that the top wing sheeting will lie
down properly on top of the spar. Remove the wings from the building board.
21.
We will shape the trailing edge now because it will be harder to do if they are already joined. Use a razor plane and/or sandpaper,
being VERY careful not to damage the ribs. Do not go under about 1/32” thickness on the trailing edge. If you get too thin, you can
use a little bit of thin CA to harden the edge and sand it smooth afterwards.
22.
Glue together the 2 3/16” joiners with the bottom and outer surfaces flush. LIGHTLY sand the bottom of the brace to make sure it
flat and smooth. Lightly sand the top to an angle, not going further than the top edges in the front and back. Test fit this part
between the spars in the wing as shown below. Lightly sand it if you need to for it to fit properly. Also sand the front surface so it
fits flush between the front and back of the spars as it will be slightly too thick without sanding.
