Author Topic: Another Bowline?  (Read 393 times)

NAWTZ

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Another Bowline?
« on: February 17, 2020, 10:32:50 PM »
Asking about another Bowline, does this Bowline already exist. At first glance, this looks like a Lee Zep Bowline, but it's not. I would assume the "Lee Zep" is more secure. Here are some photos.
« Last Edit: February 17, 2020, 11:41:15 PM by NAWTZ »

agent_smith

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Re: Another Bowline?
« Reply #1 on: February 17, 2020, 11:59:26 PM »
Hello NAWTZ,

Again - not 'new'.

Alan Lee and Xarax both tied this variation and came to the same conclusion.... the Lee Zep Bowline is more secure.
The present structure which you have tied is vulnerable to slack shaking and cyclic loading events.

Also, a technical point:
By a strict definition, this isn't a 'Bowline'.
Yes - it has a 'nipping loop' - but this alone is not sufficient for awarding the title of 'Bowline'.

Only one leg of the 'collar' is encircled and compressed by the nipping loop. Both legs of the collar need to feed through and be encircled by the nipping loop.

If you study all of the 'primary Bowlines' illustrated by Ashley, they all share the following geometric traits:
1. There is a nipping loop
2. The nipping loop takes the form of a single or double helical loop - which can have either S or Z chirality.
3. The nipping loop is 'TIB' (ie it can be formed without access to either end).
4. There is a collar - and the collar performs a U turn around the SPart.
5. Both legs of the collar feed through the nipping loop.
6. The nipping loop encircles and compresses both legs of the collar.

Without these criteria, the definition of a Bowline would too w-i-d-e and open the floodgates for many eye knots to claim the title of 'Bowline'.

tsik_lestat

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Re: Another Bowline?
« Reply #2 on: February 18, 2020, 12:40:23 AM »
The word bowline, features a powerful dynamic, always triggering some serious action ;). By rights, it has been declared as being the king of knots !!

You might want to check the following link https://igkt.net/sm/index.php?topic=3908.msg27595#msg27595

Focus on reply#22, third, fourth image. Hopefully, it will advance your explorations ;).

« Last Edit: February 18, 2020, 09:37:27 AM by tsik_lestat »
Going knots