Piper J-3 Cub - Hangar 9

Section 3: Servo Installation (Aileron) Step 10Place a clevis retainer onto a clevis. Thread the clevisonto a 4 3 / 4" pushrod wire. Remove the backplatefrom a control horn, and then attach the clevis to thecontrol horn. Step 12Drill the locations marked in the previous step usinga 3/32" drill bit. Step 11Position the control horn on the aileron. Use thepushrod wire as a guide to align the horn to the servoarm. Position the horn so the holes align with the hingeline. Use a felt-tipped pen to mark the positions for thethree mounting bolts. Step 13Place a few drops of thin CA into each of the holes toharden the balsa. Attach the control horn using three2mm x 20mm screws and the control horn backplate.Align holes with hinge line17