Assumptions:
#1410 is typically tested in its mid-rotation state.
This mid-rotation state is the default mindset.
These statements might --
leaned on hard-- be wanting
for factual support. By which I mean that although we
might
see the knot presented in this orientation,
and even if we find by empirical observation that it is
frequently tied so,
likely we cannot be sure of the tested knot.
(IMO, you're probably correct; but we just don't know
for sure, as this aspect hasn't been noted and reported
on by anyone --testers or otherwise, for that matter
(save me/us)!)
--as you remark:
As far as this tester is aware, nobody has tested and reported on the effect of rotation.
As for
It has been theorized that a simple rotation can improve stability (per Dan Lehman)
,
more to the point is that while I have opined that the mid-rotation
state might be worst, we simply need to examine behavior
while paying attention to such states. So, the pure point
is that
orientation might make a difference.
RANT ON
furthest
Why do folks forget "far/farther/farthest" --measures of
distance, of linear position & sense (even if said
metaphorically) ?!? These are (were) common, long-used
words. "Further" is a note of continuance or difference
in broad measure, unlinear-like.
(Similar and sharper rebuke comes for the now seemingly vogue
esp. newscaster abuse of "reticent" for the perfectly known
word "reluctant" --egadz, folks are going lame-brained.
RANT OFF
I, too, have found one of the extreme-of-rotation states
not so stable, wanting to turn into the mid-span state;
but I do believe that this extreme case CAN be SET
and hold, to rupture, if not perfectly extreme in the
formation of "arc" & "loop" of its SParts, at least
more biased thus than is the mid-rotation state.
(Given the at least sometimes need for special
setting & dressing, though, we might conclude that
it's a state unlikely to occur in common usage.
But it would be worth making the effort, at least,
to get a clear test of it. Maybe also much of a
"YMMV" per material, likely stiffer cordage being
more prone to shift orientation than soft stuff
which in dressing & setting is more obedient.)
I encourage others to try to replicate my results using
EN892 'half' ropes (or a similar facsimile rope if EN892 rope cannot be sourced).
ALSO DISsimilar ropes, as doing so with e.g. something
pretty elastic vs. static might shed light on the mechanics
of the knot. AND, the general in-practice state is of ropes [<- edit "if"=>"is"]
dissimilar in both elasticity & size : i.e., of a 6-7mm "haul
line" joining the 9-10.5mm dynamic rope. (Whereas the
doubly long "twin" 8mm ropes are used sans knot on their
full twin length (does anyone ever join two such ropes
and thereby skip alternate belay/rap stations?!!)
Of course, in the case of dissimilar ropes, there is the added
orientation of which one is the "choking" rope (with the ideal
being the thinner & more flexible one).
ALSO, I suppose one can do some at least quick'n'dirty
testing of the
offset fig.8 e2e bend, which maybe allows
even greater variance in orientation. Maybe here, though
not seeking to recommend this knot no matter ... ,
we'll find that there is an especially dangerous orientation!
(Recall that some French folks seem to PREFER this knot,
and to have test data in which it performs better --i.e.,
rolls at only higher forces-- than the
offset water knot!?
--which surprised me, but it is a presentation that came
up to my awareness in the past two years.)
Ropes available to me for my crummy 5:1 pulley stressing
--lousy pulley, but bouncing on it surely imparts surges
of force up to what ought to come by good sheaves alone--
are : ancient "Goldmantle' --the name says it all (~40yrs)--,
some old 11mm Mammut dynamic, some other old bit
(discarded top-roping anchor lines), newer 11mm gym
rope, some newer & pretty unused 8mm ropes,
Sta-set 11ish mm yacht rope, 3/8 BW II, and the
incredibly intractable PMI pit rope & some Canadian
stuff that makes the former seem, er, not-so-bad
(!! fankly, these might be unlikely to form an offset knot
that any sane person would actually use!), and other
7mm kernmantle low-elongation ropes, & 6mm.
--dl*
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