Dec 2020
With addition of seaplane door, now i need a different location for the elevator trim crank and indicater.
Cable was re routed to top of the cabin. This required two pulley brackets to guide the cable from the back to the front and a mount welded to the top x brace for the crank pulley.
April 2021 with the birdcage fabbed and mounted, now the top guide pulleys stick up above so thats not good.
I removed the original mount and rearranged it to a position below the top of the cage. I had to also move the crank pulley to the underside of the x brace, no problem with that. Next I had to relocate the intermediate set of guide pulleys to align with the upper guide pulleys. After all this the endless trim cable was too long. The only solution I could dream up was to add 2 to more pulleys in a z formation to take up the slack.
Later in April:
not happy with the trim, too much slippage even with the cable tighter than seems reasonable. New plan. I have one double groove pulley, and two single groove pulleys. I mounted the double groove pulley at the rear on the jack screw. I then mounted tthe single groove pulleys at the front on the crank. Now the cable is too short so its time to relocate the crank pulley rearward. This requires a tube welded in location between the top x-brace structure. Some mock-up effort required to find the correct location. A small idler pulley was added to direct the cable from the top groove to the bottom.
At the jack screw, an adjustable idler pulley was installed to allow for cable tension adjustment. The former z bracket was removed and a new piece was welded in to provide a bracket for the adjuster.
The system now works much better, and cable does not required excessive tension so cable stretch should not be an issue.