Looked at your diagram of the whoopie and UCR now.
A few small niggles:
- we did our computations using the bury length before the bury for the constrictor part and then measured the amount buried after the bury to get the length inside the constrictor. The constrictor part gets shorter when the bury is completed. The longer the bury, the greater the shortening. My GF suspects it is a linear relationship and she said that TeeDee suspected the same.
- As we make the UCR, there should be another fixed eye on the end on the right in your diagram for attaching to either the hammock or the marlin spike hitch, whichever. We need 2 fixed eyes, one for the hammock and one for the marlin spike. That increases the UCR length needed. The shortening of the constrictor must be accounted for in computing the final length.
- we simply could not get the UCR to hold consistently with a bury length less than 12" to 14" on amsteel (1/8") or dynaglide. we needed that as a minimum for the UCR to obtain a consistent hold whether using a prussic or tubing. If we used neither, we had to increase the bury to about 18" to get a consistent hold and even then it was extremely sensitive to touching for us, I mean extremely sensitive.
- we follow Samson's splicing recommendations. They recommend 3.5 fids for the whoopie bury which comes to 9.6" for the 1/8" amsteel and 8.4" for 7/64" amsteel and 6" for 2 mm dynaglide. All of our computations and measurements of whoopies and UCRs are based on these dimensions. Any one of those is less than the 12" to 14" we needed for the UCR.
- samson's recommendations for the fixed eye bury is 2.25 fids which computes to 6.2" for 1/8" amsteel, 5.4" for 7/64" and 4" for dynaglide. So for the UCR as we make them, you double those numbers.
- doesn't really make any difference whether you bury a terminator or tie a knot for a terminator, just do the same for both the UCR and the Whoopie to get an apples to apples comparison. 1 terminator for the whoopie and 2 terminators for the UCR.
- we used 2" for the fixed eyes. That is 2" when pulled flat, or 4" of rope in the eye. That comes to 8" in fixed eyes for the UCR as we make them.
Not too sure, but my GF thinks you may have accounted for 2 fixed eyes in the UCR formula, but she isn't sure. She is pretty sure that you need to double E in your formula (it goes out and back). But that's another niggle.
Studied your diagram some more and I think you have the 2 fixed eyes, just not where I first assumed the second one would be. Ignore those niggles if so.