Hangar 9 Piper J-3 Cub 40 ARF - Manual (Page 8)

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 Step 11
Cut a groove from the hole to the bottom of the rudder to
allow clearance for the tail gear bearing.
 Step 12
Apply a thin layer of lubricant where the bearing will
ride in the rudder. Use 6-minute epoxy to glue the wire
into the rudder.
 Step 13
Cut a slot in the end of the fuselage to accept the tail
gear bearing.
 Step 14
Install three hinges into the rudder. Test fit the rudder
to the fuselage, sliding the hinges and tail wheel bracket
into position.
 Step 15
Use 6-minute epoxy to glue the tail gear bearing into the
fuselage. Use thin CA for the hinges.
Section 1: Hinge Installation