Great Planes F4 Phantom - GPMA0440 - Manual (Page 22)

19. Use 30-minute epoxy to glue the die-cut 1/8"
plywood ribs T-1 to T-2 and T-7 to T-6. Position the ribs so
that they overhang slightly at the LE and TE. The
overhang will allow the ribs to be sanded flush with the LE
and TE.
2. Test fit the forward wing joiner and the die-cut 1/8"
20. While you are waiting for the epoxy to cure, go back
to step 1 and build the other wing tip. Make sure to build it
over the opposite wing tip plan.
plywood aft wing joiner in the wing. The widest end of the
forward wing joiner is inserted in the wing. The aft wing
joiner fits in the groove in the sub TE.
21. Sand ribs T-1 and T-7 flush with the LE and the top
and bottom sheeting. Use the die-cut 1/8" plywood wing tip
LE gauge to sand the LE to shape. The gauge is held
against the LE parallel to the ribs.
Note: The gauge has a root and a tip shape.
3. Check the fit of the wing tip on the wing. Sand the
wing or wing tip so the joint between the wing and wing tip
is tight and smooth.
4. Wait until after the wing is covered to glue the wing tip
to the wing.
wing plan with the LE of the sheet aligned with the front of
the die-cut 1/8" balsa aileron sub LE.
in the wing tips and wing. The sides of the forward openings
in the wing need to be trimmed at an angle to allow the
die-cut 1/8" plywood forward wing joiner to fit between the
wing spars. Drill 1/8" holes at the punch marks. on the aileron sheet with the front of the ribs flush with the
front of the sheet.
1. Use a sharp hobby knife to cut out the joiner openings
1. Pin the die-cut 1/16" balsa aileron sheet over the
2. Place the die-cut 3/32" balsa ribs A-1 through A-6
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