Author Topic: Crossload Testing the Lee's Locked Yosemite Bowline  (Read 1076 times)

WolfCub

  • New Member
  • *
  • Posts: 1
Crossload Testing the Lee's Locked Yosemite Bowline
« on: March 08, 2019, 02:50:06 PM »
Hi Everyone,

I just joined and am glad to have found this community  :)

I was reading an older post regarding tests that had been conducted on a Lee's locked Yosemite bowline and had a question about whether or not the additional tests were ever conducted. I also had an additional test I was hoping would be conducted. Since it was an old post, I figured I might resurrect it in a new thread.

Original thread: https://igkt.net/sm/index.php?topic=6017.0

I was wondering if there were ever results from follow up tests (suggested by other users).

Also, I was wondering if there was any way that this same knot could be tested for cross-loading as demonstrated in the video linked below which was testing figure eights with different finishes as well as standard and backed up bowlines.


agent_smith

  • Sr. Member
  • *****
  • Posts: 1200
Re: Crossload Testing the Lee's Locked Yosemite Bowline
« Reply #1 on: March 13, 2019, 02:33:31 PM »
In my view, Harry Buttler's variation of the 'Yosemite' Bowline is superior.
Some Bowlines are vulnerable to circumferential (hoop) loading of the eye. Harry Butler's variant is what I like to refer to as an inherently secure Bowline.
Other examples of inherently secure Bowlines include; Lees link Bowline and the EBSB Bowline.

The 'testing' you refer to would likely be done by an enthusiast/hobbyist tester.
It is highly unlikely that a professional test lab would fund such a test.

If you are expecting peer reviewed tests using the scientific method - you could be waiting for an eternity.
Most enthusiast/hobbyist testers work in isolation using improvised test rigs. While that is not 'bad' per se, it may not meet the rigor of professional test labs.

Why not undertake your own testing and report your results in the knot test section of this forum?

Edit: Unable to upload an image of Harry Butler's version of the Yosemite Bowline (temporarily).
« Last Edit: March 13, 2019, 02:35:28 PM by agent_smith »

Dan_Lehman

  • Sr. Member
  • *****
  • Posts: 3933
Re: Crossload Testing the Lee's Locked Yosemite Bowline
« Reply #2 on: March 14, 2019, 12:25:36 AM »
In my view, Harry Buttler's variation of the 'Yosemite' Bowline is superior.
...
Edit: Unable to upload an image of Harry Butler's version of the Yosemite Bowline (temporarily).
Try this :



Quote
The 'testing' you refer to would likely be done by an enthusiast/hobbyist tester.
It is highly unlikely that a professional test lab would fund such a test.
...
Most enthusiast/hobbyist testers work in isolation using improvised test rigs.
While that is not 'bad' per se, it may not meet the rigor of professional test labs.

Why not undertake your own testing and report your results in the knot test section of this forum?
As for "rigor", YMMV : rigor in some senses amounts
to little more than superfluous nonsense --precise
measurements of a dubious quality, say!
Whereas some quick'n'dirty backyard testing can show
aspects of the knot well enough, nevermind having
some precise force value ascribed to it.

(I'm seeing now a bit of worry re the Butler YoBowl :
i.e., that the 2nd-made collar with the final tail tucking
can shift position vis-a-vis the main collar.  So, take care
in dressing and do set it!)

--dl*
====

breadwild

  • Full Member
  • ***
  • Posts: 28
  • Designer/developer by day knot tyer by night
    • Business
Re: Crossload Testing the Lee's Locked Yosemite Bowline
« Reply #3 on: April 10, 2019, 01:43:24 PM »
Quote
Edit: Unable to upload an image of Harry Butler's version of the Yosemite Bowline (temporarily).

I would like to see this variation. I spent a lot of time "perfecting" Lee's locking version. (or maybe that is the 1010 that Dan uploaded?)

Update: I found an almost identical image of the #1010 where Butler is credited by name. Still curious which is considered more secure, Lee's version or Butler's?
« Last Edit: April 10, 2019, 01:56:04 PM by breadwild »
-----
Brad
breadwild@gmail.com

Dan_Lehman

  • Sr. Member
  • *****
  • Posts: 3933
Re: Crossload Testing the Lee's Locked Yosemite Bowline
« Reply #4 on: April 12, 2019, 01:54:50 AM »
Quote
Edit: Unable to upload an image of Harry Butler's version of the Yosemite Bowline (temporarily).

I would like to see this variation. ... (or maybe that is the 1010 that Dan uploaded?)
That was my "try this" point --the requested knot image.

Quote
Still curious which is considered more secure, Lee's version or Butler's?
One needs to speak of materials, as it's they that have
physical characteristics >>so-knotted<< --not the *knot*
per se.  E.g., some ropes don't bend well and will have
bends taking more rounded geometry than a fold/hard bend,
with consequent behavioral effects; Scott's Locked bwl
has a 1dia bend in the tail's added tucking, and this doesn't
sit well in stiff rope, but one can vary it just a little so that
2dia of the knot are taken in by this turn and all's well!

--dl*
====

breadwild

  • Full Member
  • ***
  • Posts: 28
  • Designer/developer by day knot tyer by night
    • Business
Re: Crossload Testing the Lee's Locked Yosemite Bowline
« Reply #5 on: April 12, 2019, 06:23:44 PM »
Points taken. Thank you. As a newbie I haven't even gotten into rope types! Finally found a nice big tight round one that allows me to see the knot forms clearly so I can compare to the pictures.
-----
Brad
breadwild@gmail.com