Great Planes Piper J-3 Cub 60 Kit - GPMA0162 - Manual (Page 26)

D 1 Use 30-minute epoxy to glue two 5/16" x 3/4" x 7/8"
basswood servo mount blocks to each aileron servo
hatch Position the blocks to accommodate your servos.
D 2 When the epoxy has fully cured, fit a 1/32" or 1/16"
temporary shim between the servo and the plywood hatch,
then mount the servos to the blocks. Remove the shim
CUT OFF
UNUSED
ARMS
D 3 Trim cross-style servo horns as shown, then install
them on the servos.
Control Throws section for recommended throws upon
final radio set-up The cross-section on the wing plan
shows the correct neutral position of the servo arm to
produce differential throw.
How to silver solder.
Use this process when soldering metal to metal such as
brass tube to wire, or pushrod ends to wire.
A. Thoroughly clean the items to be soldered with
alcohol or degreasing solvent Pay special attention to
the inside of the Threaded Brass Couplers
B Roughen the area to be soldered with fine sandpaper,
then clean again
C. Assemble the items to be soldered.
D Apply a small amount of soldering flux Acid based
liquid flux works best when one or more of the items
is steel
E Heat the metal with a soldering gun or iron, and apply
solder to the metal The metal must get hot enough to
melt the solder and the solder must flow freely into
the joint.
F. Do not move the parts until the solder has cooled.
G. Test the joint by pulling hard.
H Clean off the excess flux with alcohol or solvent. Coat
the parts with a fine film of oil.
Inspect all glue joints in the wing and apply CA where
necessary Set the wing aside for now
D 4 Install and adjust the aileron linkages Two .074" x 4"
threaded end rods are provided to make the aileron
pushrods Use a nylon clevis on one end and a solder
clevis on the other end Silver solder is highly
recommended See the following Expert Tip Mark and drill
1/16" pilot holes, then attach the small aileron control
horn with two #2 x 3/8" sheet metal screws Refer to the
D D 1 Pin or tape the fuselage side plan to a flat surface
and cover it with waxed paper Trial fit a die-cut 1/8" balsa
upper front fuselage side, lower front fuselage side,
and aft fuselage side Sand as necessary to achieve a
good fit and glue together with thin CA Wipe off excess
glue with a paper towel before the CA cures (See photo at
step 2.)
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