Great Planes PT-E Trainer Electric Kit - GPMA0110 - Manual (Page 29)

D D 18. Find the two tapered balsa pieces that are 9-1/8"
long. These are the wing tips. Glue one of these
tapered balsa wing tips to the tip rib (the narrow
edge of the tapered wing tip goes down).
D 22. On rib W-l, draw lines 1/8" in front and back of
the spars.
D D 19. Carve and sand the wing tip to blend with the
tip rib. Sand the front and rear corners to a rounded
shape as shown on the plan. Also sand the top and
bottom edges to a slightly rounded shape.
D 23. Working very carefully and slowly with a razor
saw, cut out 1/8" strips in W-l in front and back of
the spars. Do this in both wing panels to provide
openings for the dihedral braces. Note: It is OK if
the part of W-l between the spars is broken out.
D D 20. Using a razor saw, carefully cut off the leading
edge, spars and trailing edge flush with rib W-l.
Then sand smooth and flat using a T-bar.
D 21. Turn the plan around so the Left Wing Panel
drawing is facing you, and repeat steps 4 through
20 to build the left wing panel in the same manner.
D 24. Check the spars in the area you just cut out. If
any wood or glue remains attached to the spars, sand
it off with your T- bar.