Great Planes Piper J-3 Cub 60 Kit - GPMA0162 - Manual (Page 33)

D 1. With the engine mounted, determine where the fuel
lines will pass through the firewall and mark the locations.
blocks in the notches in the lower fuselage doublers. The
wing strut blocks protrude 1/8" below the fuselage bottom of
the fuselage sides. The LG mount plate and the edge of the
LG former are flush with the bottom of the fuselage sides.
D 2. If you are planning to install the optional Great Planes
Sport Floats, now is the time to add the float mount
gussets (included in this kit), and the 1/8" birch ply aft
float mounting plate (included with the floats). See the
plan for their locations. Even if you don't plan to install
floats, it is easier to install the gussets at this time rather
than retro-fit them later. We strongly encourage you to put
your Cub on floats someday - it's a thing of beauty!
D 3. Draw a centerline on the landing gear block from front
to rear.
D 2. Determine the location of the throttle linkage. Throttle
linkage is not provided in this kit. To enable the throttle
linkage to clear the fuel tank, we've rotated the carburetor
on the O.S. .91 180 degrees.
D 3. Drill the fuel line and throttle linkage holes. For
standard, medium size silicone fuel line, a 1/4" (15/64" for
a perfect fit) hole is the correct size.
D 4. Install a 12 oz. to 16 oz. fuel tank and temporarily
connect the fuel lines. Be sure the throttle linkage will clear
the fuel tank in the fuel tank compartment. Our prototype
uses a 14 oz. Great Planes fuel tank with the 90-degree
nipple and 1/2" foam on the top and bottom of the tank.
Mount the foam rubber to the tank floors with double-sided
tape or thick CA. Foam rubber should also be placed
between the tank and the firewall.
D 4. Align the main landing gear halves with the
centerline so the two will not quite touch (approx. 1/16"
spacing). The gear halves should be evenly spaced fore
and aft. Mark the hole locations.
D 1. Test fit, then use 30-minute epoxy to glue the 1/4"
plywood LG mount plate the die-cut 1/8" plywood LG
former and the 5/8" x 5/8" x 1" basswood wing strut D 5. Drill the landing gear block with an 11/64" drill.
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