So today was the day I finally tried to change the upright angle of my backrest (seat) on my delta trike. This was done with some trepidation and some utube research (how to bend tubing without a bender) - in reverse. As it turned out, I was going from an 80 degree almost upright seat back to a 60 more or less degree- semi- recumbent angle. I tried simulating the suggested 50 degrees with a tiltable weight bench and it seemed to be too reclined for my tastes. Anyway- if this cut and try method works, it will not be too difficult to get another 5 or 10 degrees using the same Slit saw and re-weld method that I tried today.
Tip- I used my electronic angle finder- Pretty handy gadget- magnetic bottom and you can zero it at any angle , move it to your desired second surface and get the difference between the original spot and your test point.
After the tack welds were done the seat angle was 59.2 degrees in reference to the main backbone- which is where I zeroed the angle finder. The backbone sits fairly level with the ground, so 59.2 is fairly close to reality and probably will feel drastically different than my old 80 degree butt hurt angle I had before.
Tip- I used my electronic angle finder- Pretty handy gadget- magnetic bottom and you can zero it at any angle , move it to your desired second surface and get the difference between the original spot and your test point.
After the tack welds were done the seat angle was 59.2 degrees in reference to the main backbone- which is where I zeroed the angle finder. The backbone sits fairly level with the ground, so 59.2 is fairly close to reality and probably will feel drastically different than my old 80 degree butt hurt angle I had before.