Great Planes P-51D Mustang 40 Kit - GPMA0175 - Manual (Page 16)

while holding them in correct alignment, apply thin CA glue
to "lock" the panels together. Do not apply CA glue to any
area that is already coated with epoxy. Allow the epoxy to
fully harden before disturbing the wing.
D 5. Sand the wing joint smooth all around.
of petroleum jelly to the ends of the plastic tubes (to help
prevent glue from getting inside and locking up the torque
rods).
D 7. Use 5-minute epoxy or thick CA to glue the plastic
bearing tubes into the grooves in the center TE pieces. Wipe
off any excess glue and allow it to harden.
INSTALL AILERON TORQUE RODS
D 1. Roughen the short end of the aileron torque rods
with 100-grit sandpaper, and file the same end to a wedge
shape,
File end to
wedge shape
D 8. Trial fit the trailing edge / torque rod assemblies
onto the wing trailing edge. Sand the center trailing edge
pieces slightly where they join, for a good fit. Glue these
pieces in place with epoxy. HINT: Use masking tape to hold
these pieces to the wing TE, to aid in correct positioning.
SAND "FLAT" ON TE
D 2. Roughen the surface of the plastic bearing tubes
with 100-grit sandpaper.
D 3. Clean the torque rods and bearing tubes with alco-
hol.
D 4. Find the two grooved, tapered balsa center trailing
edge pieces. Lay them on the plan, mark and cut them off to
match the plan for length and angle at the centerline.
D 1. Study the wing plan near the wing centerline. Note
that the center portion of the TE must be sanded flat.
D 2. Sand approximately 1/4" into the TE at the center-
line. (The flat will end up approximately 3-1/4" wide at the
TE).
D 5. Trial fit the torque rods into the center TE pieces.
Determine from the plan where to cut the clearance notches,
which will permit the torque rod horns to travel freely. Also
cut small clearance notches in the wing TE. Note: The
torque rod horns must exit the TOP of the wing!
D 6. Slide the plastic bearings toward the threaded end of
the torque rods, then use a toothpick to apply a small amount
FIBERGLASS THE CENTER SECTION
NOTE: Because of the high stresses in the center of
this wing, fiberglass reinforcement is REQUIRED.
Please do not omit this important section!
16