The aileron bellcranks have a brass bushing that is inserted into the bellcrank tube and is held in place by a bolt between two brackets in the wing. The bushing contacts the brackets and the bellcrank rotates around the bushing to move the ailerons via pushrods - so the bushing/tube need to be smooth and free moving. That's what I worked on this session. I set the drill up as a mini lathe to turn the bushing while I smoothed the outside of the bushing with scotchbrite pads. I used a drill bit that was almost the same size as the inside dimension of the bushing, and the, with a part of a tongue depressor slid in to the channels, it held the bushing in place. I also drilled out the inside of the bellcrank tubing and then used red scotchbrite and smoothed out the inside of the tubing too. I took my time doing both bellcranks as I did not want to overdo it and introduce "play" into the joint.
The bellcrank will not be installed into the wing in the present configuration - as the bellcrank bolt is too long. I will have to loosen the bellcrank bracket, which means getting at the back side of the spar - which means taking off the fuel tank.
mini-lathe - bushing held in place with a wood rod in a drill bit
