Hi Brian,If, for example, your loop length is about 30.5” (.0415 g/in), and your stretch 5x relaxed length to wind (after break in, properly lubed) an 85% breaking turns number would be 4,100. Probably need more back off (the large number of backoff turns needed is another indicator of needed changes (thinner rubber, more pitch or flaring prop).
Sorry been finishing up my piled up weekend homework like any other high school kid do Sunday night ( )
Just measured the loop length and the loop is just a tad bit more than 30 inches.
I'm always scared to step back more during winding since there seems to be so much tension in the rubber. I think it may be beneficial for me and my team to dedicated a day where we just wind rubber bands to their limits and get a feel on what that is like.
Thanks for your help!