Perfectly circular climbing rated Caribiner ?

[mountainm]

I'm looking for a perfect ring shaped Carib or Maillon that will allow me to rotate and therefore release attached cords which are under tension. It has to be climbing rated.

Does such a thing exist?

[Graham_S]

I've never seen one, and I doubt it exists from a safety point of view,
It's be far more likely to deform under extreme load and fail.

[mountainm]

I've never seen one, and I doubt it exists from a safety point of view,
It's be far more likely to deform under extreme load and fail.

I thought that may be the case - any ideas for an alternative solution. I'm looking for a failsafe to stop the whoopies on my hammock hanging experiment getting into a "locked" situation, May just have to be a loop in there somewhere that I'm willing to cut if it comes down to it. A climbing rated turnbuckle would do the trick if such a thing exists?

[southey]

Are you using a marlin hitch on your tree tapes if using them?

[southey]

Look for the hitch, it just slides out to release any tension.

[mountainm]

Are you using a marlin hitch on your tree tapes if using them?

Good question. I want a horizontal SRL (direct to both trees) pulled as tight as possible so I need a release mechanism.


I have two hanging options at the moment.

Option 1: I have some custom 2" 3m webbing strap with Caribs (or this could be a marlin spike) - using the caribs I wouldn't be able to undo these.
Option 2: I use the DD straps like belts tight on the tree with a standard shoelace knot then maillon or softshackle to these - hoping that the webbing will come loose when the free ends are pulled (even under tension)

Both options worry me a little so for my first hang I was going to build in a little safety and use some 550 looped 5 times in between one of the straps and the whoopies until I see if it will all release nicely. However I would prefer a bombproof method.

You suggesting that using the marlin hitch I could just push the dowel free?

[southey]

Yup, i made a set last night after watching this, tried this morning in the garden, got in the hammock with me kids and dog after about half an hour of them gooning about to tighten every thing up ,with them still in i just pushed the pin out! i was happy they were not!

[mountainm]

Yup, i made a set last night after watching this, tried this morning in the garden, got in the hammock with me kids and dog after about half an hour of them gooning about to tighten every thing up ,with them still in i just pushed the pin out! i was happy they were not!

What you using as the toggles then? I take it as it's the knot taking the weight, not the toggle it doesn't have to be anything to OTT?

[resnikov]

What you using as the toggles then? I take it as it's the knot taking the weight, not the toggle it doesn't have to be anything to OTT?

I used a small stick I found on the ground last night as a toggle whilst testing a hammock. Worked fine.

[southey]

I had a length of tempered Ali rod I drilled a couple of holes in for ties so as not to loose them, cut to length and sanded the lot down smooth.

[mountainm]

I used a small stick I found on the ground last night as a toggle whilst testing a hammock. Worked fine.

OK - will go with a cut down tent peg for now then - I need low friction so it pulls out easy.

[resnikov]

According to wiki, it says ones thats tapered is better so if the knot pulls tight its easier to work loose.

[mountainm]

Not sure if I've got anything like that - I need something tapered and smooth. Don't forget my rig will always be under tension so being able to pull/push it out easily will be even more important.

[southey]

I reckon a stick would be crimped by the hitch dude and therefore not be able to pull out. could top get a length of steel rod from b and q? I used Ali as that's what I had lying around(benefits of working on aircraft for a while) just to make you feel better I'm typing this while in my hammock! In the garden.

[mountainm]

I reckon a stick would be crimped by the hitch fire and therefore not be able to pull out. could top get a length of steel rod from b and q? I used ali as that's what I had lying around(benefits of working on aircraft for a while) just to mase you feel bytter I'm typing this while in my hammock! In the garden.

Slacker - I may have to sacrifice one of my rod rests..... but it aint tapered.

[resnikov]

Just use a tent peg as you send but sand it down to a taper at one end. Jobs a good un.

[EdS]

with a set up like that why don't you just have tight ridge line and then tie the hammock on with prussik/klamhiest.

[mountainm]

with a set up like that why don't you just have tight ridge line and then tie the hammock on with prussik/klamhiest.

I don't trust prussiks on amsteel, prussiks work better on lines of different diameters and amsteel has a low melting point, although I haven't tried it - but I'm belt and braces.

[southey]

Slacker - I may have to sacrifice one of my rod rests..... but it aint tapered.

Hahaha the benefits of being a kept man! just to make you spit!

[mountainm]

Hahaha the benefits of being a kept man! just to make you spit!

Hah well, I'll have you know I enjoy travelling the hour into Leeds, sitting in an office all day then not making it home in time to see my kids for more than 30 minutes before they go to bed! Yeah.... that's living that is....

erm

yeah!

[Ch@rlie]

I just use 15mm wooden dowel about 75mm/ 3" long drilled in one end with some dynema tied into a loop so I can hook it into my clip when packing away so I dont lose them.
There have been a couple of people on the hammock forum report they have had toggles snap, which is one reason I didnt go down the Ali route.


But in answer to your original question, you could use a "quick release wichard" its not circular but you pull a cord and it releases even under high tention, they're are used in sailing but not sure for what purpose exactly (but you wont like the cost depending on type, back then 10yr ago they ranged between £15-£40) when I was Kite buggying the we made captive harnesses so you could release the kite if necessary very quickly if you got into trouble. many didnt think this was safe at the time but soon learned the benefit once they couldnt "un hook" from a conventional harness.
i'l try to find a pic. but the toggle was deffo your best move.

[mountainm]

Wow, having seen the prices of the wichards, dowel sure is looking attractive. I found a tapered steel bottle opener which I think ill use for now.

[Ch@rlie]

Wow, having seen the prices of the wichards, dowel sure is looking attractive.

hahahaha thought you might.

[mountainm]

hahahaha thought you might.

I did find these http://www.baysidemarine.co.uk/produ...e_shackles-600 but there's no weight rating on them

[Ch@rlie]

the product you found is what many in the kite buggy scene started buying because they are cheaper, but they were taking their life in their hands because "under load" the pin becomes jam'd due to the forces on its side holding it closed. Not an issue if your stood by a hammock swearing at it because it wont release,
But a major problem if your being dragged at 40mph+ speeds and need to ditch the kite while your doing unsheduled exit from the buggy hahahaha
this is the safest version, but not cost effective for hammock use. Hence toggle. there is another type I've used on my buggy harness, I cant think what its called atm might need to dig it out n look, that was about £15 (back then) and works on the same principle as the wicharr Quick release.
http://www.reliancemarine.com/Produc...2673/View.aspx

[Highbinder]

I need to ask... Why pulled as tight as possible? I don't k ow what you're trying to achieve from this.

There's no force on the toggle, so why not debark some sticks and taper the ends.

Prussics on amsteel are a bad idea. It's a very slick line, and may derate the cord too (afaik the reason knots derate amsteel more than other cord is because of it's hollow nature)

[Zingmo]

Aha! I now know that the brass thingy I found years ago was a wichard! I just wish I knew what I had done with it.

I was wondering whether anyone had tried making something like a viking shroud pin (vantnål). This was a simple lever/toggle which was used to tension the mast shrouds on a viking longship. I found a picture on this page- just search for "shroud". Just found a better picture - it's image 2 on the "Sailing" slideshow on this page.

I was thinking that something like this could be fashioned out of a six-inch nail or a tent peg.


Z

[mountainm]

I need to ask... Why pulled as tight as possible? I don't k ow what you're trying to achieve from this.)

Theoretically it will allow me to pitch off centre.

[Shewie]

I've read this a couple of times now and I still can't work out what you're trying to do Mike

What do you need to release under tension? You might have to remind me what the green, red and blue lines are again. Which part are you trying to release, is it the green joining the tree straps or the green joining the red and blue part ?

[mountainm]

I've read this a couple of times now and I still can't work out what you're trying to do Mike

What do you need to release under tension? You might have to remind me what the green, red and blue lines are again. Which part are you trying to release, is it the green joining the tree straps or the green joining the red and blue part ?

going on what everyone has said I think the toggle system will solve the issue - but anyway. It's just so when all the whoopies are tight I can reintroduce slack in the system for a take down. If I wasn't babysitting today I'd have the whole thing set up by now with piccies.