Top Flite TOPA0215 - Manual (Page 10)

- 10 -
❏ ❏
7. Test fit the W2 rib at the end of the basswood spar.
❏ ❏
8. Locate the die-cut 1/8" [3mm] plywood
dihedral gauge. Place the gauge flat on the building
board at the root of the wing and against the side of
the W1 rib. Once you are satisfied with the rib
placement, use CA to glue the rib to the basswood
spar. Important! Be sure you use the gauge to set
the angle of the rib. Failure to do so will not provide
the wing with the required amount of dihedral.
❏ ❏
9. Use CA to glue each of the ribs onto the
basswood spar. Make sure that each of the ribs is
perpendicular to the building board.
❏ ❏
10. Glue the 3/16" x 3/16" x 29-3/4" [4.8 x 4.8
x756mm] balsa leading edge sub spar into the
notches in the top of the wing. Glue the 1/4" x 3/8" x
29-3/4" [6 x 9.5 x 756mm] basswood top spar into the
notches in the top of the wing.
❏ ❏
11. Beginning at one end of the wing, center the
shaped balsa leading edge on the front of the rib.
Glue it to the rib. Center the leading edge on the rib
at the opposite end of the wing and glue it in place.
❏ ❏
12. Glue each of the remaining ribs to the
shaped balsa leading edge, centering them as you go.
❏ ❏
13. Place the shaped balsa trailing edge in
position as shown on the plan. The trailing edge should
be placed flat on the building board and against each of
the ribs. When satisfied with the fit, glue the trailing
edge in place to the eleven W1 ribs and the W2 rib.
❏ ❏
14. Locate one of the 3/32" x 1-1/8" x 30" [2.4 x
28 x 760mm] balsa leading edge sheets. Cut it to a
length of 29-3/4" [756mm]. Using a sanding block,
bevel one edge of the sheet to get a good fit between
the sheeting and the leading edge of the wing.
❏ ❏
15. Glue the leading edge sheeting in place
between the leading edge and the balsa leading edge
sub spar.
❏ ❏
16. Locate one of the 3/32" x 1" x 30" [2.4 x 25 x
760mm] balsa trailing edge sheets. Cut it to a length
of 29-3/4" [756mm]. Glue it in place on the trailing edge
of the wing.
❏ ❏
17. From the 3/32" x 3" x 24" [2.4 x 75 x 610mm]
balsa sheet, cut out six shear webs. When cutting the
shear web be sure the grain is perpendicular to the
wing spars. Position the shear webs on the wing
spars as shown on the plan. When satisfied with the
fit, glue them in place.
❏ ❏
18. From a sheet of 3/32" x 3" x 30" [2.4 x 75 x
760mm] balsa sheet, cut three pieces 4-3/8" [111mm]
in length. Edge glue the three sheets together to form
a sheet 4-3/8" x 9" [11 x 229mm]. Once the glue has
dried, cut the sheeting to fit between the leading
edge sheet and the trailing edge sheet as shown on
the plan.