Section 6. Installing The Rudder And Elevator Control Horns - Hangar 9 J-3 Piper Cub Instruction Manual

Section 6: Installing the Elevator
and Rudder Control Horns
Parts Needed
• Control horns (3)
• Control horn back plates (3)
• Control horn screws (12)
• Fuselage with horizontal and vertical stabilizers attached
• Elevators (2)
• Rudder
Step 1. Locate the two elevator halves. Make sure the hinges
are still installed. You will also need two nylon control horns,
two backplates and four screws.
Step 2. For illustration purposes, we will describe installing the
control horn on the bottom of the right elevator first. Measure
1/2" back from the hinge line of the elevator and 1/2" from the
edge of the elevator that is closest to the fuselage. Make a mark
with a felt-tipped pen. Do the same for the other elevator.
Tools and Adhesives Needed
• Thin CA glue
• CA debonder
• Drill
• Drill bit: 1/16", 3/32"
• Felt-tipped pen/pencil
• Medium Phillips screwdriver
• Ruler
Step 3. Locate one nylon horn. Trial fit the horn on the right
elevator with the horn positioned so the holes that the clevis will
go into are aligned with the hinge line of the elevator (the for-
ward edge that will fit against the horizontal stabilizer).
Step 4. Line up the inside edge of the horn with the mark you
made in Step 2. Mark the screw holes with a felt-tipped pen
or pencil.
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