Author Topic: Ashley Stopper modified for Dyneema  (Read 141 times)

evan@hudsonmcdonald.com

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Ashley Stopper modified for Dyneema
« on: September 18, 2020, 12:33:49 AM »
Sorry...it's a short video of how to tie.

https://www.youtube.com/watch?v=ii4c7aRonOQ

Modified ABoK #526 (oyseterman's stopper) to make it more slip resistant. Is this an existing knot, and if so, has anyone load tested it? I wanted to come up with a better looking Stopper knot that the EStar Stopper, and this modification shown has worked well on my boat so far in a highly loaded application.

Evan

agent_smith

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Re: Ashley Stopper modified for Dyneema
« Reply #1 on: September 18, 2020, 05:43:26 AM »
Hello Evan and thanks for sharing your passion!

I'm not sure about the originality of your presentation - and it wont be long before we can get an informed opinion about it.

Some points:
[ ] At 0:33 in your video you have a 'slipped' stopper knot...might be interesting to play with that geometry to see how it performs. Being 'slipped' makes it potentially easier to untie in the future (if that ever become a necessity).

[ ] #526 (Oysterman's stopper) is also known as the Ashley stopper knot.
Something that I discovered about #526 a while back is that it is in fact topologically equivalent to none other than the simple #1010 Bowline.
In other words, if you tie a simple (#1010) Bowline - and then collapse it - you end up with #526.
This means they are 'topologically' equivalent.
I'm not sure if this has been noticed before?

One thing, when tying #1010 simple Bowline, you can orient the 'tail' in 2 different positions (either drawn through the 'eye' of the Bowline or not).
Also, as with all knots, they can be tied in mirror opposite 'chirality' - both being equally valid.
That is, if you tie a simple Bowline and hold it up to a plane mirror - you will see an inverted virtual image that is equally valid. Most knot tyers tend to tie their knots in a certain way - and this is usually determined by their 'dominant' hand (ie a right handed person tends to tie a knot 'mirror reflected' relative to a left-handed person).
The same would apply to your presentation - in that you can hold it up to a mirror and see an equally valid inverted form.
« Last Edit: September 18, 2020, 05:45:18 AM by agent_smith »

Dan_Lehman

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Re: Ashley Stopper modified for Dyneema
« Reply #2 on: September 18, 2020, 10:30:51 PM »
I wanted to come up with a better looking Stopper knot that the EStar Stopper,
and this modification shown has worked well on my boat so far in a highly loaded application.
So, Evan's vs. Evans's !   ;D

Note that a main problem with Ashley's stopper
is that loading it doesn't tighten the bulk of the
knot and there's a vulnerability for the SPart's
nipping turn to pull though --one must set the
overhand part well!  If one ties much the same
thing but with the overhand in reverse orientation,
the SPart will turn around one side, so it cannot
pull through --and one still gets that nice 3-sided
stopper face.

Your slipping the knot helps prevent pull-through,
too; and then you tuck the tail through the slip-bight
to lock it further : I should hope that this all will
hold in HMPE rope (but EStar claims some surprising
slippages!).  I think you're on the right track.

Another tact to take is the *doubling* of the bulk
component, the overhand, by which I mean going
around that again (not using a "double o."), which
will build bulk and security.


--dl*
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