Great Planes Super Decathlon 40 Kit - GPMA0185 - Manual (Page 15)

INSTALL WING TIPS
NOTE: The wing tips will be cut and carved from the
1/4" x 1-3/4" x 11" balsa blocks.
D 1. Draw a centerline on the ends of the wing and on the
wing tip blocks.
D 2. Securely glue the wing tip blocks to the ends of the
wing, lining up the centerlines you previously drew.
D 3. Cut, carve and sand the wing tips to blend with the
wing, and to the shape as shown on the plan. NOTE: Leave
the tips oversize in the area of the ailerons, for now.
D 3. Hold the ailerons in place in the openings, with the
torque rods resting on top of the ailerons. Mark the torque
rod locations on the top of the ailerons.
D 4. Drill a 7/64" hole in the ailerons at the torque rod
locations, starring at the leading edge centerline and drilling
straight in to the proper depth.
D 5. Use the sharpened 1/8" diameter brass tube to cut a
groove in the leading edge of the ailerons to accept the torque
rods. Trial fit the ailerons onto the torque rods and cut as
necessary until they fit.
D 6. Lay the ailerons on the plan and mark the hinge
locations on the ailerons. Place the ailerons against the wing
TE and transfer the marks over to the wing.
D 7. Cut the hinge slots in the ailerons and wing TE using
an Xacto knife. (The suggested procedure was given on page
9).
INSTALL AILERONS
NOTE: Do not glue the aileron hinges until after your
model has been covered.
D 1. Draw an accurate centerline along the LE of the
tapered balsa ailerons and the wing TE.
D 2. Check the length of your ailerons against the actual
aileron openings and trim the ailerons as necessary. You
should provide approximately 1/16" gap at each end of the
ailerons.
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D 8. IMPORTANT! Condition or "break-in" the
hinges by folding them back and forth several rimes.
D 9. Using a T-bar with 50 or 80-grit sandpaper, sand the
leading edge of the ailerons to the same "V-shape as shown
on the wing cross-section drawing on the plan.
D 10. Insert the hinges into the slots and trial fit the
ailerons in place on the wing. Do not glue the hinges until
after you have covered the wing.