Breakaway lanyards

[Mesterh]

Is that in 3D?

[Buzzsurgeon]

Just call on your experience and get up there and get the job done, I am sure on the day it won't seem half as bad!! Think this tree is playing with you as you had to beat it last time with an extended pole!!

[softbankhawks]

Tim, It certainly was a great number of legs from one rope.

I dont think the same could have been achieved so simply. It created a floating anchor while allowing MA to pull the pieces up.

Re-directing would have brought the pieces closer and drifting between two pulleys would have taken longer.

I charge more when i use my grcs but i dont take the piss out of my employers and anyway it is so interesting to play so i have been finding solutions to having a portawrap only.

Paul

[Mark Bolam]

Steve, I've seen what you can do on here, and have a feeling that this tree must be a bit of a bitch if it has got you thinking this much.

 

I suppose a recce climb is a bit late in the day now?

 

All I can add is good luck with it.

 

And can I have your new workout tower if it goes wrong?

[scotspine1]

can I get the Navara?

[Paul Smith]

Making a break away strop is very easy, just not that easy to explain!

 

All you need is 2 cut aways or soft links, a tent peg or a trailer retaining pin and an elastic band and a short sling as an handle or puller.

 

You would use your strop/lanyard as normal but where your ART positioner is add the cut away to the swivel if it's not already there.

 

To make the quick release bit. Place the ART cutaway through the loop of the other cutaway with about an inch sticking through. Slide the tent peg through the 1 inch loop until it's half way through. Use the elastic band to go over the top of the tent peg and bottom so it holds it in place when the strop is slack. Add the sling to the top of the tent peg.

 

Clip the second cut away to your harness with a crab as normal.

 

This will give you the full strength of a strop with the ability to have an emergency break away. To separate the cutaways pull the short sling hard releasing the strop at the cutaways.

 

This method is also used on parachutes to deploy the main chute but they use plastic coated Kevlar wire.

 

Hope I have explained it good enough?

[treequip]

Having done a job or two where a break away W.P. lanyard would have been useful this thread piqued my interest so I have just tested some 25mm fastex buckles (the kind you find on your rucksack). The rig was a bit improvised but I am satisfied the data is accurate enough for the job in hand if statistically limited.

 

The average failure was 12kg on a 0.2m drop load and 40kg on a gradual load, this was based on samples of 10 in a single line connection.

 

You can use “a.n other” W.P. system but I would include a breakaway on each end. It is possible that in the event of the breakaway operating the attachment (biner) could snag on its way around the tree.

 

You can also get the buckles in 50mm I haven’t tested any but they would presumably have higher values. A tape link also has the benefit that if it your breakaway fails it cuts easy with a pruning knife particularly when under load.

 

Work carefully and stay safe.

[Heads up]

interested to see how you do it steve. Think i'd go with a zip tie between my splice and karb, load it so the adjusters on the karb and it "should" pop off.

good luck:thumbup:

[Steve Bullman]

 

You can use “a.n other” W.P. system but I would include a breakaway on each end. It is possible that in the event of the breakaway operating the attachment (biner) could snag on its way around the tree.

 

 

good point

[Luckyeleven]

Thread revival, Ive been thinking about this with the storm season fast approaching, and I Think I may have found the perfect solution, an Anchor trip link

[ame]

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