This trick changes everything

[Omegajet]

Like the sailor that suggested it, I utilise similar onboard my boat. As a suggestion, try replacing the 'pulling clutch' with an equal sized nylon cord with the core removed, this has allowed me to grip dyneema to tension it where a dyneema clutch has slipped. Would be interested to see the breaking strain of that combination!
Thanks for the excellent content 👍

[jackwilfong]

PSA IT WILL CREEP! You gave me this idea when I saw a whoopie sling on your video years ago. I use this "clutch open whoopie" method for a 3/8" amsteel infinitely adjustable tow strap/ rigging strap for a small crane. Brummel on each end Chinese finger trap in the middle, loaded as you have done here. IT CREEPS!! With my 3/8" dyneema with ~2 foot bury under ~1000lb of force. It will CREEP ABOUT 2FEET/ HOUR. Still works well for me for quick jobs. Thanks for all the great ideas and info from your

[Macca]

You've got a UCR (universal constrictor rope). The 'tail' end, where the cut part is, if you put just a little bit of tension in the direction of pull (a friction knot made with a rubberband on the main line will be enough), it will hold better!

[andrewsnow]

Having just watched some of your stuff on whoopie slings, I was think about how all but one tinny spot is double strength. The concept you tested here occurred to me, but I had no idea if it would hold. Thanks for doing the test! I'm someone that will benefit from your testing, and I don't even climb. I'll be putting it to use for a winch extension line for recovering stuck 4X4's (which I do on a volunteer basis). Your work has wide ranging applications. Thanks.

[andrewbarabas]

You can increase the tension on the constrictor dyneema by adding a loop on the end. Wrap the loop around the main line (it's sort of a clove around the main line). That will pull the constrictor tighter, so it grips better and creeps/slips less.

If you search images of "UCR hammock suspension" you'll see what I mean.

[daviddroescher]

Well done.
I suggest adding tension to the loose tail. A bungee cord to an anchor rope to a bag of hammers over the side would do.

[TimothyShaw]

In hammock circles, the equivalent is the utility constrictor rope used for adjustable ridgelines.

[dawntreader]

i think i dropped a link to the ronstan constrictor a few weeks ago. sailboats will all have textile clutches in the future. presently clutches resemble ascenders that are bolted to the deck in a row. the textile clutch is cheaper, easier to fix, does less damage to the rope, and is a lot stronger than steel.

[mattdryden]

I love that you are getting back to sailing as inspiration. Sailing has inspired so much of climbing's ropework from the get-go.

[herranenspearguns]

I "invented" this concept for spearfishing for fighting tuna in a way that wouldnt damage our epdm bungees around 15 to 18 years ago, around 2 or 3 years after we started selling it and named it a clutch, harken had it in their catalog. Since I'm not is the sailing world it could have already existed without me knowing about it, but I had never seen it before when I started making them and we named it . A patient attorney friend wrote us a patient application for it for us because it was such a game changer for what we do

[augustinmoinat]

On the 2.7k line, we did not need the shower curtain method because we could lay the webbing on the ground, but for the line with the flags we needed to tension 4mm dyneema. In the end, we went with 2 km of 4mm dyneema in the middle, and the ends were 8mm polyester rope (400m on each side) which we pulled with VT knots.

[alastairmacdonald-pbki]

As a thought the probable reason why the clutch slipped lower than other similar tests is because only one end was tentioned. A solution to this would be a length of dyneema with an eye splice on each end, you use one eye for anchor the middle as the clutch and the last eye as a tensioner. Bungee cord maybe.

[charanvantijn]

Thanks. The eye held because the fixed part is tensioned. How about tensioning the open end by brummel splicing the long line through the dyneema first, and then bury it? That way you will tension the short side and thus have more holding strength.

[REMIREZZ]

Ryan, it’d be super interesting if you tested a sailing cam clutch (or various types of boat line clutches) because there might be an effective way for you to mount those to a metal plate that you tie off to an anchor. I’m much more a sailor than I am a climber, so I’d absolutely love to see the results, and just maybe it’d add a new tool to your arsenal!

[OldSloGuy]

If you are far enough from the edge, attach a bungee to the end of the finger and anchor it near the edge. This helps collapse the finger around the rope. Think of the capstan equation, The capstan is a force multiplier, However, even if the multiplier is 1000, zero initial force times 1000 is still zero force.

[dustinbradham]

I saw a video of a modified version of a woopie sling with an eye on the "tail" end of your "outside" piece. The eye was wrapped around the long piece twice to keep tension, so the inside piece locks in better. Hope that made sense and helps.

[benjaminnevins]

If you saw this video theres a really good chance we survived lol

[inderida]

For your "grabbing side splice" maybe you could do a slightly smaller diameter than the actual line being pulled threw. That way it could have more of a grabbing effect/chinese finger trapping... if that makes sense.

[dongrider]

06/29/2023 This is how a water ski rope is tied off. Only diff is ski rope is not dynema and the tail of the handle end or the loop end is threaded once through across the straight line with a half hitch back through the eye of the handle end then threaded through the line before. I have enjoyed this slipage a few times until I bought a new ski rope and saw how the factory spliced the eye as above. Also the recommended length of the tail into the sleeve was 36 to 72 times the diameter of the rope. I have used this method of splicing ski rope several times each summer for myself and other sport warter skiers. Wet fun until you get too old, if ever. Some ski into their 90's. I never heard the tech name of this knot but you can see it in any boat shop. Don

[hakansundberg]

Try to compress the splicing, tie a thread around it, a couple of turns! Do that at the end where the inner line is being drawn out. This would hopefully compress all the splicing ... Try it!