Brief Description: Aileron Bellcrank and Servo Installation
With the brass bushings drilled out for AN4-32A bolts, I was ready to install the bellcranks. The right wing will house the Garmin GSA 28 roll servo so the installation of the bellcrank is a little different. The installation kit has a servo mount bracket that replaces the lower bellcrank bracket. Looking at the Garmin installation instructions I bolted the bracket to the servo with the included hardware and torqued the nuts as specified. I removed the lower bellcrank bracket from the wing spar and placed the new bracket with roll servo mounted in its place. I torqued the 2 bolts. I greased the inside of the bellcrank that holds the brass bushing and slid the busing in place. I had to remove the upper bellcrank bracket in order to get the AN4-32A bolt in place. I installed the bellcrank and torqued the bolts. Next I installed the W-730 bellcrank jig which holds the bellcrank in the neutral position. I threaded the rod bearing ends onto the short rod that connects the servo arm to the bellcrank. With the servo arm at neutral I adjusted the length of the pushrod, tightened the jam nuts and installed with required hardware. The w-716 aileron bellcrank to control stick pushrod needs to be 69 9/32" long from rod end bearing center to rod end bearing center. I installed the M3614M rod end bearings with jam nuts. Using my tape measure on the floor and bolts through the holes of the bearings, I adjusted the length until I had the 69 9/32" measurement. I also installed the left wing bellcrank with harware and torqued to spec. Last I made the 2 aileron bellcrank bushings from AT6-058 x 5/16" aluminum tubing to 1 1/16" length.
