Great Planes F4 Phantom - GPMA0440 - Manual (Page 14)

11. Use 30-minute epoxy to glue the center plate in the 15. Trim and glue 3/32" x 2-1/4" x 3" balsa shear webs,
notch of rib R-1, bottom main spars and spar joiner. Place
a piece of wax paper over the assembly at rib R-1 and
weight the bottom main spars down. While the epoxy is still
wet, use thin CA to glue the bottom main spars to the ribs
starting at rib R-8 and working toward R-2. The bottom
main spar should be flush with the bottom of the wing ribs,
and the center plate will be bent down slightly on each side
of ribs R-1.
perpendicular to the front of the main spars. The shear
webs must be glued securely to the main spars.
16. Sand the aft end of the wing ribs flush with the sub TE.
12. Sand the ends of the balsa sub front cap to match
the sweep of the wing. Test fit the shaped balsa leading
edge on the front of the wing ribs. The sub front cap will
need to be sanded an additional 1/16" to compensate for
the ribs in the notches of the LE. Make sure that the LE is
straight.
17. Sand the larger ends of the shaped balsa trailing
edges to match the angle at ribs F-1. Glue the trailing
edges flush with the top and bottom of the sub TE.
by gluing at rib R-8 working toward R-3.
13. Glue the LE, centered on the front of the ribs. Start
14. Sand the LE flush with the front of the sub cap.
18. Use 6-minute epoxy to glue the die-cut 1/8" plywood
wing dowel braces into the slot in ribs R-2 and R-3.
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