Author Topic: 2014 cam knot evolved: beautiful lacing knot & new Prusik/slider/tarp/jam knot  (Read 330 times)

bushrag

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Disclaimer: the Prusik claim is not tested supporting the bodyweight of a person. It may or may not slip under a large load. Experiment at your own risk.

The history:

In 2014, I had experimented with a binding knot structure which I originally posted here: http://igkt.net/sm/index.php?topic=4763.0

User Bjoern_Hee (sadly disappeared from the forum, it appears) gets credit for his reshaping of the knot to a new knot which he posted here: http://igkt.net/sm/index.php?topic=4763.msg31500#msg31500

This knot served as the basis for my exploration, which all have similar form. That old thread was mostly dead when I posted that only one turn was necessary: http://igkt.net/sm/index.php?topic=4763.msg39772#msg39772

My subsequent development started from the single turn version.

That knot can be used very nicely as a binding constrictor as a solitary knot, as originally intended.

https://imgur.com/koerqgp

I realized that the uniformity of the two tag ends laying perpendicular to the constriction could be exploited in running form. Laying down a series of the same knot results in "cable lacing" which can tidly and securely bundle multiple loose cables.

https://imgur.com/86sBWxi

What makes this knot superior to existing cable lacing knots is twofold.

First, existing lacing will collapse if the working end is relaxed; in my case, the constriction means each knot will hold fast, individually and collectively.

Second, the method to snug the knot involves pulling the tag ends, which when laced in place, means that each knot is pulling the previous knot snug, so that the entirety of the lacing run is actually applying a constricting snug force to each knot. Very very nice.

Tying steps:
https://imgur.com/jxmKuVp
https://imgur.com/Sin5bws
https://imgur.com/ZgXouW8
https://imgur.com/VGkiwO7
https://imgur.com/w3T1vWj

I have since used this method of lacing many times, and it is brilliant in all regards. I am wiring my camper van and the wire work is looking beautifully organized.

Compared to other lacing, it has two negligible flaws: it is hard to properly distribute the spacing between each knot, and it requires more time and patience to perform the turns and snug the knot.

As I used the knot more and more, I realized that the knot only needed a few more turns and the running strand between knots could withstand parallel pulls, much like a Prusik or a tarp knot. After much experimentation, it resulted in the following:

https://imgur.com/bwVyyNb

The running form of multiple knots shown here works great in camping as a daisy chain. The gray cord will not slip. But in reality this form is a carry-over from the lacing form, It can probably be used more practically as a single knot. pulling either tag end will jam the knot; grasping the knot itself will allow it to slide freely (albeit with some friction).

Tying steps:
https://imgur.com/1IFxiAG
https://imgur.com/IxjSyD4
https://imgur.com/E8wG630
https://imgur.com/de4dGJg

I find the form of this knot has satisfied a complaint I have long had with other tarp knots and the Prusik itself, the lack of symmetry: this knot is completely symmetrical and can be loaded from either direction.

I have found the knot must be tied with smaller cord which makes the tarp application harder as you need different sized cords on hand.

Please experiment and enjoy this knot. And if you know any NASA engineers, please show them the lacing! I would love to see this knot blast into space and bundle unruly wires throughout the solar system.
« Last Edit: November 19, 2018, 08:22:39 AM by bushrag »

Dan_Lehman

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I find the form of this knot has satisfied a complaint I have long had
with other tarp knots and the Prusik itself, the lack of symmetry:
this knot is completely symmetrical and can be loaded from either direction.

Which is also true for the Prusik hitch ?!

--dl*
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