Great Planes Piper J-3 Cub 60 Kit - GPMA0162 - Manual (Page 32)

D 2. If you would like to install a tube to route the receiver
antenna through, slide another pushrod tube (not included)
through the holes at the bottom of each former. The
antenna tube should extend to the aft edge of the fuselage
sides. Glue the antenna tube to the formers only, and cut it
off 6" in front of F3.
D 1. Use a hobby knife to cut through each aft upper
fuselage side 1/8" above the aft lower fuselage side (in
other words,1/8" above the glue joint). Cut through the aft
upper fuselage side but not through the doubler. Later
the seam will be filled with epoxy.
Note: The purpose of this cut is to allow the fuse sides to
flex when they are pulled together in the next step.
LI 2. Trial fit the die-cut 1/8" balsa stabilizer base and the
die-cut 1/8" plywood top deck former TF4 to the fuselage
sides. Squeeze the fuse sides together, making sure that
the fuselage sides and the aft fuselage doubler contact the
top deck former. Use medium CA to glue only the
stabilizer base into position — not the former.
D 3. Remove former TF4 and securely glue the stabilizer
base from the inside of the fuselage. Do not glue the rear
of the fuselage sides together.
D 4. Inspect all glue joints and apply thick CA
where necessary. Fill the seam that you cut in Step 1 with
30-minute epoxy. Force epoxy all the way into the gap.
D 1. Attach the engine mount to the firewall using the
8-32 x 1-1/4" socket head cap screws and #8 washers
and lock washers provided.
D 2. Locate the engine on the mount so the distance
between the firewall and the front of the drive washer is
6-3/16" (157mm). Mark the bolt locations on the engine
mount, then drill four #29 or 9/64" holes. Tap the threads
into the engine mount with an 8-32 tap.
D 3. Mount the engine mount and engine on the firewall.
Line up the molded marks on the engine mount with the
horizontal centerline on the firewall. If the marks are
separated (as is the case with the O.S. 91 4-stroke), "split
the difference," placing the centerline of the firewall
between the two marks of the engine mount.
The photo shows the optional inverted 2-stroke engine
mounting. The Top Flite In-Cowl Muffler and Header
simplify installation (see the Engine And Mount Selection at
the beginning of the manual).
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