Author Topic: Bowlines based on butterfly's nipping structure  (Read 151 times)

tsik_lestat

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Bowlines based on butterfly's nipping structure
« on: September 14, 2021, 11:11:42 AM »
First image shows a typical butterfly nipping component, which i see it as a TIB double loop nipping system, while the second image, illustrates a bowline formation, (loose form), using the direct SP continuation component, as the primary nipping loop.

Note that the returning bight/collar leg, is being inserted through both nipping loops, a maneuver that locks down the structure.

What i like about this approach, is that the on-going eye leg continuation component,  contributes to the tug end restrain, creating in conjuction with SP, (third image) a forceful constriction effect that firmly secures the tail and resists to cyclic loading or slack shaking loading inputs.

Tucking the tail back through the collar, (fourth image), leads to the TIB variant.
« Last Edit: September 14, 2021, 11:16:24 AM by tsik_lestat »
Going knots

enhaut

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Re: Bowlines based on butterfly's nipping structure
« Reply #1 on: September 14, 2021, 03:47:22 PM »
Hello tsik_lestat,
I am really happy that you found a sound bowline from this nipping structure. I assume that you explored all the possible routes ( Xarax searching method ) to complete your loop and that maybe some other configuration is waiting in your lab.
I prefer the TIB form which has the merit of being well balanced and easy to untie. Loosening this form the watchful knotter can even detect the Zeppelin component in the Constriction area. Or am I wrong?
I invite the field of knot testers equipped adequately to perform some tests on this bowline.
I also like your grey backdrop, the colour theme is exquisite.
Bravo.

 
« Last Edit: September 14, 2021, 03:49:33 PM by enhaut »

siriuso

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Re: Bowlines based on butterfly's nipping structure
« Reply #2 on: September 14, 2021, 09:35:59 PM »
Hi tsik_lestat,

I like your nipping loop. Base on it, I did the tail tucking in a simply way to form another bowline.

yChan

tsik_lestat

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Re: Bowlines based on butterfly's nipping structure
« Reply #3 on: September 14, 2021, 11:44:26 PM »
Thank you gentlemen for your valuable feedback.

Enhaut, besides the EEL property, which means that one can tie it as a crossing knot based loop respectively, i believe there's nothing really special in the knotting toolbox of the same concept, that worths to be mentioned, except this powerful, super strong, bowline formation, advanced by Siriuso.

Nonetheless, i must say that this is not the first time i come across to it and here is the proof....

https://igkt.net/sm/index.php?topic=4464.msg33112#msg33112

Xarax, and apparently Siriuso, appear to double the constriction power, with both bight legs nipped completely by butterfly's double nipping system, forming a more balanced, twisted pretzel-shaped configuration.

Xarax acknowledges it as the safest TIB bowline that he knew at the time he had posted it, dare i say that this is quite possibly much stronger than his other pretzel-shaped designs.

https://igkt.net/sm/index.php?topic=1940.msg13446#msg13446

What's left to investigate, is if the proposed OP's structure, is an improved amendement for the jamming profile.
« Last Edit: September 14, 2021, 11:49:11 PM by tsik_lestat »
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Dan_Lehman

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Re: Bowlines based on butterfly's nipping structure
« Reply #4 on: September 17, 2021, 05:58:59 PM »
I like your nipping loop. Based on it, I did the tail tucking in a simple way to form another bowline.

Something like this works with the Fig.8's
bowlinesque like form, giving a nice-looking
curvature the the SPart.

(-;

KC

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Re: Bowlines based on butterfly's nipping structure
« Reply #5 on: September 18, 2021, 12:44:42 PM »
Actually, it always screams out to me, HFP Poston's Sliding 8 for adjustable eye;
in loaded use sliding and 8 are misnomers >> that are actually more helpful to understand the tying, rather than the loaded phase.
We remember the 8 dutifully made in the rope's as poured from the more liquid form while in hand.
Thus, our mind associates it in the loaded form as an 8 component working for us.
Just as faithfully make and reference HH in Sheepshank that in loaded use can roll out of the lock form HH w/90degree shelf
BUT rollout to a 360 non locking, no arc90 shelf form, that is certainly more failure prone (pic).   
.
As like in actual LOADED, where forms from most liquid to most rigid now, usage of HFP 8, morphs to more of a Bowline to me in this LOADED form.
We now see a HH type 90 shelf in the most rigid part of the rope (other than SPart, that directly feeds)
>>it makes a nipping loop(that is made then lost in Sheepshank, opposite of not made then created here) , that the BE gets choked by (as like in Bowline)
>>after an arc180 across the fig8 Xing(instead of around SPart like Bowline)
BUT while doing so, also adds hard nip to that fig8 Xing
.
The HH function is more like a terminating(hitch) than continuing(prefacing bend like coupler) at this point,
but yet just continues as a long way home, like fig8 style HH /thru extra arc
"ABoK Lesson#1666. A FIGURE-EIGHT HITCH is more secure than the HALF HITCH,
particularly if the encompassed object is small."  >> small like 1 or 2 rope parts?
before continuing downward as normal continuous HH would.
To that view is even more continuous HH-ish
The extra long way home (Supertramp path) w/extra arc also affords another nipping loop, pre-fixing the main nipping loop.
.
In time of proving, perhaps shine remaining thru enough tests to upgrade from utility class to rescue ready class;
especially if gets another stop/lock added.
« Last Edit: September 18, 2021, 01:40:50 PM by KC »
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