Top Flite P-51D Mustang User Manual page 23

pushrods to exit the bottom wing skins. The
plans show the proper size and location of these
holes. Reinforce the inside edges of the slots as
shown with strips of scrap balsa.
14. Put the wing upside down on its "jig."
You may want to tack glue the wing to the table
and jig to keep it from moving around.
15. Apply a generous bead of slow CA glue
to all the structure the skin will contact. Apply the
skin to the wing, starting with the leading edge.
Use thin CA and kicker to anchor the Leading
Edge. Roll the rest of the skin back over the
structure and press it in place until the glue sets.
16. Apply the other bottom wing skin.
17. If you are using functioning flaps, put light
marks on the skins where the hinges will go, so
you can find the blocks later.
NOTE: If you are building operating
flaps, you may leave a small gap in the
sheeting along the flap cut line to
make it easier to cut the flaps loose
later.
18. Sheet in the areas of the bottom of the
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wing that are not covered by the main skin.
NOTE: Leave the wing on the jig until
you are ready to sheet the top of the
wing. This allows less time for
moisture and stress to twist the wing.
19. Trim any remaining jig tabs off the ribs
and blend any high spots away with a sanding
block.
20. Pass a 13/64" drill through the Wing Bolt
Plate. Then drill through the bottom skin to
eliminate any problems finding the holes later.
21. Fit the top wing skin to the wing.
NOTE: The top skin may be glued on
in one of three ways: You may glue
the skin to the wing structure all at
once as you did when sheeting the
bottom, you may glue on the individual
sheets separately, or you may follow
the procedure below.
22. Tape the wing skin to the LE in a few
places. Use thin CA to glue the skin to the
leading edge.
23. Set the wing horizontally on the table and
lift the trailing edge so the wing tilts forward at
about 40 deg.