I have previously tested the Double Dragon and this variation of it by tying around a post and then pulling my body weight against it, even "bouncing" my weight to try to really stress it.
Yeah, sometimes the shock-loading even merely manually
puts a good deal of force into the knot. But maybe a more
sure method is to load w/simple 2:1 pulley arrangement
(e.g., with carabiner or some metal ring), and a little bounce
to boost force back towards actual 2:1 over the friction-reduced
total coming w/o (e.g., I've balanced 45# vs 62.5# with slippery
cable-pulling tape over a 'biner!).
> Both the DD and the symmetrical DD become very tight.
> The collar becomes rock hard and difficult to move.
What "collar" ? IMO, the most collar-like part is the
SPart's turn around (collaring, thus) the eye legs;
and, yes, that will become tight, but as it's a surrounding
of 2 legs that are also loaded, there can be some bit of
play with shifting their positions, maybe?
I hate the regular bowline (sorry knot people), but I like the Yosemite a little.
You should LIKE it, but for use at appropriate conditions.
As for the
YoBowl, try it with a "wide swing" --i.e.,
it turns LESS tightly around the single returning eye leg
and so crosses over/upon the SPart to tuck into the
other side of that,
AND THEN
put in what is called sometimes "Lee's Lock" : tuck
the tail back out through the central nipping loop,
a more sure securing and one that bears upon
the SPart (given this "wide swing")!
Also, I've recently read here that the loop form of the Zeppelin
really does not take advantage of the design features of the Zeppelin Bend (aka "Thrun's Joint")
since the loading is different. It's also not aligned with the center of the loop
which seems less optimal than it could be.
Eh, so what. The knot can be tied and be pretty secure
and easy to untie, nevermind the armchair'd lament of
being imperfectly zep'd! (There are ways to get more
*balance* & zep-ness but it's a dubious gain, IMO.
Ashley's #1452 & a not-fully-traced #1425 make
nice eye knots, too.
So now I'm left with the DD, or the symmetrical DD, ...
Or the dreaded bowline variants. I suppose I could tie figure 8s or figure 8
follow throughs but I think those knots jam a bit too.
There are many BWL variations that should not give dread,
and the Lehman8 is a variation on the
Fig.8 EK which is
fairly simple knot, slack-secure and pretty easily loosened.
cf.
www.zetatalk3.com/docs/Knots/Knot_Knowledge_Photo_Illustrations_2004.pdfAT PDF PG. #211 (!). (And, while in this neighborhood,
do consider the
Locktight eye knots of pp.212ff!)
Then beyond these is a
single BWL in the bight, which
is a more surely tied variation on the YoBowl. Then I show
a "strong (read 'exterior-loaded') form Fig.8" EK, to which
one fellow's testing found it less strong (than loading its
tail --which yields the "interior-loaded" version) and to
his point, much less easily loosened.)
Cheers,
--dl*
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