Top Flite P-51D Mustang User Manual page 19

6. Test fit the wing panels on the Jig Blocks
with the two die-cut 1/16" plywood Dihedral
Braces in place. Adjust any parts until the panels
join up nicely at the spars. The die-cut 1/8"
plywood Aft Cross Brace (CB) should be
included in these test fittings. If it requires
trimming, take equal amounts off the right and left
ends.
7. Make two equal length sticks from scrap to
act as spacers between the two W-2's. These
should be positioned on the W-2 centerline. The
length of these sticks will vary slightly depending
on how your spars are trimmed, but 5-1/2" is a
good starting point (see photo below). These two
sticks will make sure the W-2 ribs are parallel.
8. Test fit the Aft Cross Brace and the sticks
between the two W-2's and adjust both sticks
equally if adjustment is required. You may notice
that the spars sweep forward slightly. This is
normal.
9. When the wing fits on the Jig Blocks with
the Aft Cross Brace (CB) and the two equal
length sticks in place, it is time to glue it together.
The best method is to use 30 minute epoxy. Coat
the mating surfaces of the spars and dihedral
braces. Then assemble the parts onto the Jig
Blocks. Use CA to tack glue the two equal length
sticks into place as shown in the photos. Use CA
to glue the Aft Cross Brace (CB) into place. Use
masking tape to clamp the dihedral braces to the
spars.
10. Make four 1/16" balsa shear webs to cap
the dihedral braces between W-2 and W-3.
11. Align and glue the die-cut 1/8" plywood
W-1C's to the die-cut 1/8" plywood W-1B's, being
sure to make a left and a right.
12. Plug the die-cut 1/8" plywood Aileron
Servo Tray between the two W-1B/C's. Make
- 19 -
sure all the front edges are aligned. Use a 90
deg. triangle to hold each W-1B/C vertical while
you glue it to the servo tray.
13. Plug the die-cut 1/8" plywood F-8B into
the aft end of the assembly. Check to see that all
edges are square and properly aligned. Use a
hobby knife to make small adjustments to the
notches if required. Use a 90 deg. triangle to
hold the W-1B/C's vertical while you glue them to
F-8B.
14. Remove the rear stick.
assembly into position in the center of the wing.
Trim the aft spars and flap LE, if necessary, to fit
the assembly. Trim the flap TE as shown on the
plans and in the photos to allow clearance for F-
8B. The photos with steps 17 and 18 show you
the finished assembly.
Work the