one can wonder about the 50% and the (initial) nipping loop --given that the eye leg's loading goes first through the companion loop to reach the SPart-loaded one.
I was talking about the "nipping structure", the two nipping loops of this "8" shaped knot, taken as a whole. I do not have the slightest idea about the distribution of the tensile forces within the two nipping loops...The same can be said for all the double bowlines - and it might even be the case that the second nipping loop does not add much to the total gripping power imposed upon the penetrating collar legs ! ( So, although we can be sure about the effectiveness of the two collars, we can not be sure about the effectiveness of the two nipping loops...). We have to measure
some things here... but, till then, we can do nothing else than keep talking !
consider the rather nicely retained Z. symmetry in "twinning* the eye-side's parts
What I mean is that the original Zeppelin knot, the Zeppelin bend, is such a well balanced knot, that the loading of the former tail, although it does not distort the total symmetry altogether, nevertheless it is a fly in the ointment... If the Zeppelin bend was not such a beautiful and unique rope mechanism, it would nt matter so much, I guess. After a proper dressing and initial tightening of the knots, both the Double harness loop ( this particular version ) and the Tweedledee bowline would also be distorted, albeit not in such a degree that would make them almost unrecognisable, at least to the novice knot tyer s eye.