Great Planes Piper J-3 Cub 60 Kit - GPMA0162 - Manual (Page 42)

D 2. If necessary, raise the height of the pilot by gluing it to
a 1/2" thick block of balsa and carve the balsa to conform
to his body. A few coats of primer are brushed over the
balsa to fill the grain, then the pilot is painted with Testers®
enamel brush-on paint.
D 4. Confirm the position of the engine base in the cowl.
Then trial fit the cylinders to the engine base. The side of
the cylinder with the "taller fins" is the top. Glue the
cylinders to the engine base by applying a few drops of
thin CA from inside the cylinders.
D 5. Trial fit the engine base and cylinders to the cowl.
View the cylinders from the front and make sure they are
level. Make adjustments to the engine base if required.
Our scale exhaust was fashioned from two telescoping
pieces of brass tubing 1/2" and 17/32" outside diameter. A
piece of heat shrink tube was placed over the larger outer
tube, then shrunk to create the effect of yet a larger
diameter. Then the parts were painted. Epoxy the scale
exhaust into a hole cut in the bottom of the cowl.
D 6. Paint the engine base, air scoop and cylinders flat
black. After the paint has dried, scuff the edges of the
cooling fins for a well worn, scale effect. Paint the valve
covers silver.
D 1. Cut a T (top) and a B (bottom) cylinder half, air
scoop, engine base and two valve covers along the
outlines. Make a left engine base by cutting along the
solid outline or a right engine base by cutting along the
dashed outline. Sand the edges of the cylinder halves and
the valve covers flat for a perfect fit.
D 7. Carefully glue the engine base with cylinders to the
inside of the cowl with a few drops of thin CA, then a bead
of thick CA. Glue the air scoop, then the valve covers, in
position with thin CA.
D 2. Remove the "flashing" from the parts - especially
from the cooling fins on the cylinders. Glue the cylinder
halves together by matching up the fins and applying thin
CA from inside the cylinders.
D 3. Sand the "heads" flat until only a thin plastic sheet
remains and sand the base of the cylinders, leaving 1/8" of
material below the first cooling fin. By sanding and
trimming, adjust the shape of the tops of the "heads" until
the valve covers fit. Do not glue the valve covers to the
cylinders yet.
D 8. The finishing touches are the valve guide tubes which
are fashioned from 1/8" aluminum tubing and the exhaust
pipes fashioned from 1/4" plastic tubing that is heated, then
bent. Both items are available from your hobby shop. Paint,
then glue these pieces into position.
D 9. If you are installing a dummy engine on the right side,
build another engine in the same manner. The side of the
cylinders with the "taller fins" is still the top.
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