I "invented" this knot, then looked it up and found that it was already known, ...
I feel your pain --moi aussi (ditto #1452, 1408, & Shakehands).
> All bend knots
Make that "all (end-2-end) JOINTS" : let's leave "bend" to its
historical sense, which didn't limit it to end-2-end joints.
> have a corresponding loop, or eye knot.
YMMV, but there are various senses to "corresponding",
including tying one end to a U-fold's two ends, the U-fold
(aka "bight", but I'm abandoning that confused term!)
providing the eye; then just figure how to *fuse* one
U-fold end into the S.Part's end, and ... ! (Which can
be a way of seeing some already familiar EKs as being
essentially familiar ends joints' corresponding EK.)
> The extra wrap on the standing part of the loop knot seems superfluous,
> at least as far as security of the knot is concerned.
But note that it gives the S.Part a full turn of nipping,
and not a pear-shaped nip.
> "The additional last turn renders the bend even safer both against slippage
> (already a small danger for Zeppelin bend) and against breakage
> (due to less curvature strain where it carries most strain), ...
We can acknowledge that the strength claim --both i.p. to Thrun's
Joint (zep), and in general for knots (but a theory some of us hold)--
remains to be tested. (I'm hoping to see some 3dia BWLs given the
testing.)
But the full (extra) turn should give STABILITY to the knot to counter
the capsizing into opposed BWLesque nipping loops, which then can
themselves capsize into helical twists, as seen in that cited testing,
with the 7mm rope that sure seemed to move a lot, IMO !!
--something your tested PP rope likely was less vulnerable to,
in being maybe firmer cross-sectionally & less stretchy than that 7mm.
(try bungee/shock cord for exaggerating elasticity and seeing any\
vulnerability to that). (We would suggest that that 7mm knots test
had better set the knot, tightening the tails' pull on the collars,
compressing the opposed S.Part turns more; it would still be "an
easily untied bend" --to quote Bob Thrun's invention-presentation
article.
Thanks,
(-;