Author Topic: Karash rescue harness and waist loop  (Read 3458 times)

mcjtom

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Karash rescue harness and waist loop
« on: May 17, 2022, 08:13:01 AM »
Not new, but still interesting: https://youtu.be/6EyfYyJkZss

I understand the Karash double loop for legs.  The following knot for the waist loop is bowline, but what happens with the short section of rope connecting these two knots?  It needs to be woven within the final waist loop bowline tie in, but how - there seem to be more than one option.

p.s. Would Karash double loop be an improvement from double bowline on the bight? - usability-wise, not how to remember to tie the structure.
« Last Edit: May 17, 2022, 08:20:32 AM by mcjtom »

mcjtom

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Re: Karash rescue harness and waist loop
« Reply #1 on: May 17, 2022, 01:48:43 PM »
In the video (1:40') it says the Karash double loop is supposed to be 'better' than double loop bowline on a bight because there is no 'crossing lines'.  What does it mean?

wysper

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Re: Karash rescue harness and waist loop
« Reply #2 on: May 17, 2022, 10:08:24 PM »
Hi Mcjtom

You don't see the crossed lines in that video because he doesn't tie the bowline on the bight he ties the karash version.

If you go to a video that shows the tying of the bowline on a bight and have a look at the loops that are formed you will see the 'cross'.
Or at least they do the way I tied it.

I like educatedclimbers knot vids. https://www.youtube.com/watch?v=qr0RSVkvVaE
But there are plenty of vids out there.

Another good way to see the cross is by tying the Portuguese bowline/bowline on a coil.
There are various vids out there that show how you can tie it so the loops aren't crossed.
Look for vids that are showing it in rescue set ups.
If you can't find it, let me know and I will have a look, I might have favourited and forgotten it!  ;D

Cheers
Greg


Dennis Pence

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Re: Karash rescue harness and waist loop
« Reply #3 on: May 23, 2022, 05:30:08 PM »
Here are more details about how you could tie the "chest harness" part.  The Rapid Tying Method for making a Bowline is very similar to Ashley's Hawser Bowline #1014.  In the video they actually tie a Cowboy Bowline #1034 1/2 which I have switched to a regular Bowline by going the other way through the slip knot.  I do not think it matters much.  The detail you seem to be asking for is how the other line is captured within the Bowline.  This is similar to a Portuguese Bowline.
« Last Edit: May 23, 2022, 05:34:55 PM by Dennis Pence »

Dennis Pence

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Re: Karash rescue harness and waist loop
« Reply #4 on: May 23, 2022, 05:55:07 PM »
The Karash Double Loop is very similar to a Bowline on the Bight, and Karash's method is similar to Ashley's third method for tying #1082, but he just starts with a doubled Figure Eight instead of a doubled Overhand Knot.  Here is how to tie the Karash Double Loop using a method that generalizes the more common method for tying a Bowline on the Bight #1080.  I am not claiming it is a better method (it is not), but it better shows how a Karash Double Loop and a Bowline on the Bight are related.
« Last Edit: May 23, 2022, 05:57:37 PM by Dennis Pence »

roo

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Re: Karash rescue harness and waist loop
« Reply #5 on: May 23, 2022, 06:15:52 PM »
The Karash Double Loop is very similar to a Bowline on the Bight, and Karash's method is similar to Ashley's third method for tying #1082, but he just starts with a doubled Figure Eight instead of a doubled Overhand Knot.  Here is how to tie the Karash Double Loop using a method that generalizes the more common method for tying a Bowline on the Bight #1080.  I am not claiming it is a better method (it is not), but it better shows how a Karash Double Loop and a Bowline on the Bight are related.
Hi Dennis,

Did you develop this method of tying?  If so, don't sell yourself short.  The Karash Double Loop's old method of tying has had problems with memorability and tying errors that can lead to shrinking double loops.  It could be argued that by drawing out the similiarities to the bowline on the bight method, it may help eliminate some common paths of error.

It can also make variations more accessible.
« Last Edit: May 23, 2022, 08:06:17 PM by roo »
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mcjtom

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Re: Karash rescue harness and waist loop
« Reply #6 on: May 28, 2022, 06:58:51 PM »
The Karash Double Loop's old method of tying has had problems with memorability and tying errors that can lead to shrinking double loops.

The double loop Bowline on the bight can also be tied in a similar fashion to Karash by starting with an overhand rather than F8.  While I found it somewhat difficult at first to remember which part of the initial knot to pull once the bight is flipped over the knot in both cases so that the loops do not shrink (in the double loop bowline that would become a Palomar hitch, I think), one way to memorize it is to pull the part of the initial overhand/F8 that is the 'closest' to (or is 'communicating' with) the working end/bight being drawn in the last move.

p.s. Forgot to thank Dennis for the drawings - I got it now - cheers!
« Last Edit: May 28, 2022, 07:06:40 PM by mcjtom »

mcjtom

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Re: Karash rescue harness and waist loop
« Reply #7 on: May 29, 2022, 11:16:09 AM »
BTW @Dennis: how do you make your drawings?  I just discovered the Knotmaker but I like the Ashleynesque feel of your drawings (but need some computer crutch to make them).

Dennis Pence

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Re: Karash rescue harness and waist loop
« Reply #8 on: May 30, 2022, 10:51:25 PM »
Hi mcjtom,

I just use Microsoft Paint 3D for my drawings (and I have to keep them simple enough and small enough to stay under the 100 KB limit). If you pull them into any bit-mapped drawing program, you will see that they are not fancy enough for publication.  I have tried to learn one of the vector-based drawing programs, but I like the simplicity of Paint.  It also helps that I have over 20 years of experience creating similar things for scouting activities, originally putting them into Word Perfect documents and later into Word documents.  I have a library of several hundred knot drawings, so I rarely start from scratch.  Instead, I just edit something old.  You are correct that I model them a lot on Ashley, but I now find that if I am copying something from Ashley to give to scouters (both adults and youth), I use at least twice as many diagrams to show the steps as you will find in Ashley. 

I did a handout many years ago on the Karash Double Loop and Harness.  One adult scout leader who was an EMT liked it enough that he shared it with his fellow workers.  At that time (2015) Michael Karash had a website in addition to video you referenced.  The website had more details about the knot and the harness, but sadly it does not seem to exist anymore.

I have been reading and enjoying this forum for decades, but only recently (in retirement!) did I decide to participate. 

Dennis

mcjtom

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Re: Karash rescue harness and waist loop
« Reply #9 on: May 07, 2023, 12:36:58 PM »
I just realised that the waist/chest loop is no other than the Portugese BL (#1072) - as Greg suggested, but didn't get it...

p.s. It looks like the Wikipedia entry for the Portugese bowline has it all wrong...
« Last Edit: May 07, 2023, 12:59:50 PM by mcjtom »

Kost_Greg

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Re: Karash rescue harness and waist loop
« Reply #10 on: May 07, 2023, 04:09:40 PM »
I just realised that the waist/chest loop is no other than the Portugese BL (#1072) - as Greg suggested, but didn't get it...

p.s. It looks like the Wikipedia entry for the Portugese bowline has it all wrong...

Not exactly, because as you see, the SPart (rescue line) does not participate at all at the eye construction, (around waist,chest) as it should, according to the definition of any bowline.

On the contrary, it is just forming one (or two nipping loops) and gets out of the system.

It's the long tail component  coming from a different configuration (karash leg knot) which completes the knotting around the torso in a sheet bend like fashion.

I think Karash is doing this trick, in order to be able to work with an end, and avoid tying anything else in the bight.
 
I believe, a bowline on a bight, tied in your hands and then passed through your body from the head, would make the harness simpler.
« Last Edit: May 07, 2023, 08:55:55 PM by Kost_Greg »
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mcjtom

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Re: Karash rescue harness and waist loop
« Reply #11 on: May 07, 2023, 04:42:27 PM »
Or one can look at it as the #1073 (or its Cowboy version): one of the loops around your chest, and the other holding your legs via the Karash loops tied on it.
« Last Edit: May 07, 2023, 05:53:29 PM by mcjtom »

Kost_Greg

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Re: Karash rescue harness and waist loop
« Reply #12 on: May 07, 2023, 08:51:35 PM »
From a geometrical point of view, i can't think of the two splayed loops of the portuguese bowline, in axial alignment, as required in this application, some sort of distortion would probably follow, but nonetheless it's clearly a clever thought.

One could tie a portuguesse double splayed loop for the legs, with a retraced, very large bight, down through the collar, for the torso.

In doing so, the convention of axial alignment would be in force, with the use of just one core knot, as it was brought up in the other thread of Desmond Doss.

The bowline with a bight, tied also with a large retraced bight, would also do the job.
« Last Edit: May 07, 2023, 09:35:13 PM by Kost_Greg »
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mcjtom

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Re: Karash rescue harness and waist loop
« Reply #13 on: May 08, 2023, 05:24:19 AM »
Not that important, but it appears to me that the Karash harness, as Dennis depicted it and as I tie it, already is the same as #1073.  The one loop of it sits around your waist, the other loop of the #1073 (which has an extra Karash Dbl. Loop tied in it) goes around your legs.
« Last Edit: May 08, 2023, 06:12:59 AM by mcjtom »

Kost_Greg

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Re: Karash rescue harness and waist loop
« Reply #14 on: May 08, 2023, 11:01:59 AM »
Not that important, but it appears to me that the Karash harness, as Dennis depicted it and as I tie it, already is the same as #1073.  The one loop of it sits around your waist, the other loop of the #1073 (which has an extra Karash Dbl. Loop tied in it) goes around your legs.

Taking the third image (karash harness 3) into consideration, you are 100% accurate about your thinking.

However, all i'm saying is that i am not used in an axial alignment, loading scenario of the two splayed loops of 1073 portuguese bowline.

I always thought that there had to be some angle between the two eyes less than 90 degrees.

Would an anti-portuguese design, happen to work better in this application with less distortion?

I have coordinated with image#3 at reply#3, but i i have omitted the second leg knot eye, for simplicity and presentation reasons.
« Last Edit: May 08, 2023, 11:06:27 AM by Kost_Greg »
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