Great Planes F4 Phantom - GPMA0440 - Manual (Page 16)

4. Test fit the LE wing sheet on the wing. Sand a slight
bevel on the front of the sheet. The aft edge of the sheet
should cover the forward half of the main spar and the root
end should cover one of the R-1 ribs.
5. Remove any pins that are holding the wing to the
10. Sand the TE to match the angle of the ribs. Glue two
1/16" x 1-1/2" x 24" TE sheets to the TE, sub TE and the
bottom of the ribs.
11. Sheet the bottom center section of the wing, from the
center of ribs R-1 to R-5, using 1/16" x 3" x 30" balsa
sheets. Repeat the process to sheet the center section on
the other half of the wing bottom.
building board in front of the main spar. You may need to
set weight on the wing to keep the main spars flat against
the building board. Position the front of the LE sheet
against the LE and glue it in position with thin CA.
6. Carefully lift the sheet away from the ribs and apply a
bead of medium or thick CA to the top of the ribs. Working
quickly, pull the sheet back toward the main spar as you
press it down against the ribs and the main spar.
7. Use thin CA to glue the sheet to the main spar and 12. From the 1/16" x 3/8" x 30" balsa stick, cut and glue
sub front cap.
8. Fit and glue the second LE sheet to the other wing
cap strips to the bottom of ribs R-6, R-7 and R-8. The edge of
the cap strip on R-8 should be flush with the side of the rib.
Hint: A single-edge razor works well for this type of cutting.
panel, following the same procedure.
9. Trim and sand the LE sheet flush with the front of the
sub front cap.
13. Remove the wing from your building board. Cut and
sand the LE, TE, main spars and bottom sheeting flush with
the side of rib R-8.
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