ASSEMBLY MANUAL B-25 Mitchell ARF - RC DEPOT

Section 12: Rudder and Servo Installation Step 19Remove the backplate from a control horn. Thread a clevisonto the 2-inch (51mm) rudder pushrod and attach theclevis to the control horn. Make sure to cut a 1/4-inch(4mm) piece of tubing to slide onto the clevis beforeattaching it to the control horn. Step 21Drill the three holes for the control horn mounting screwand harden the surrounding wood with thin CA. Mount thecontrol horn using three 2-56 x 7/8-inch machine screwsand the control horn backplate. Mark the pushrod whereit crosses the outer hole of the rudder servo arm using afelt-tipped pen. Step 20Position the control horn on the fin so it won't interferewith the elevator, and so it is in alignment with the rudderservo arm. Mark the location for the three mountingscrews on the rudder. Step 22Bend the pushrod 90 degrees at the mark and secure itto the rudder servo arm. You will need to cut the pushrodwire using side cutters so it will not interfere with therudder when operated. Step 23Repeat Steps 19 through 21 to install the remainingrudder and rudder servo.63