Great Planes Piper J-3 Cub 60 Kit - GPMA0162 - Manual (Page 24)

D 9. From the 3/32" x 1/4" x 24" balsa sticks, cut, then
glue the cap strips to the top of each rib with medium CA.
These cap strips run from the leading edge sheeting to the
trailing edge sheeting.
D 10. Bevel three of the top edges of the die-cut 1/16"
plywood wing bolt plate leaving the trailing edge square.
The top of the wing bolt plate has the punch marks on it.
Align the centerlines with the centerline of the wing and
securely glue the wing bolt plate to the top of the wing.
D D 4. Cut 26 aileron ribs 2-5/8" long from the 3/32" x
3/8" x 30" sticks. Make sure each cut is square to assure
that the grooved leading edge will remain perpendicular to
the base when gluing the ribs into position.
D D 5. Glue the ribs to both sides of the aileron base with
medium CA. Make sure the front edge of the ribs are
against the leading edge.
D D 1. "Clean up" the outer trailing edge by squaring the
corners made by the outer trailing edge, rib R8 and rib R5.
Use a sanding block to trim the excess sheet above and
below the outer trailing edge.
D D 2. Place the die-cut 3/32" balsa aileron base over the
plan and mark the rib locations on both sides. Avoid using a
felt tip pen - the CA and accelerator will make the ink
"bleed" and this will be seen through the yellow covering.
D D 3. Cut the 7/8" x 13/32" x 24" grooved balsa aileron
leading edge to exact length according to the plan. Insert
the aileron base into the aileron leading edge and glue it in
place with thin CA. Make sure the base is perpendicular to
the leading edge.
D D 6. Trim the ribs to their tapered shape. If you have a
razor plane this works well. First cut (or plane) the ribs,
then final sand with a flat sanding block and 150-grit
sandpaper. Refer to the cross-section for details. Work
carefully here — remove small amounts of material at a
time and inspect your work as you go. Be careful not to
sand the ribs to a concave shape.
D 7. Repeat steps 1 through 6 to build the other aileron.
D 8. Now that you have two nearly completed ailerons,
match them to the wing and decide which one will be "right
and which one will be "left."
D 9. Referring to the following Expert Tip and the aileron
cross-section on the plan, draw a centerline on the front of
the aileron leading edge and draw the "bevel to" lines on
the top and bottom of the aileron leading edge. The line to
bevel to on the top of the aileron should be about 1/8"
away from the front of the aileron leading edge. The line
on the bottom of the aileron leading edge should be about
1/8" from the rear of the aileron leading edge. Don't forget,
you've designated a right and a left aileron. Don't build
two rights or two lefts by carving the same bevel on
both ailerons.
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