What rope

[AndyG]

Whilst i will have a Tirfor winch and full recovery bag of stuff, and not looking for trouble, thinking of throwing in a length of nylon rope, just in case. Note i am thinking relatively flat recoveries, not rock ledges etc.

And im talking Defender 110 with a load.

I'm no engineer, but 12 or 14 mm maybe ?

Any advice welcome.

[weeds]

are you talking dynema/plasma as a winch extension, 10mm or 12mm will do. I brought two winch ropes, one fo rthe winch and the cut in two for winch extensions

here is my thread........no sure if I mentiond in the thread but I didn't buy from where I said

http://www.aulro.com/afvb/recovery/178841-how-i-selected-my-synthetic-rope.html

[AndyG]

No, run of the mill nylon rope.

[101RRS]

What? for use with your Tifor - I thought they are wire rope on as the "jaws" will chew nylon/plasma rope to pieces.

Garry

[weeds]

What? for use with your Tifor - I thought they are wire rope on as the "jaws" will chew nylon/plasma rope to pieces.

Garry

I assumed winch extension.......I would only ever load up plasma rope and not any old nylon

[AndyG]

Allow me to clarify,

Tifor has 20 m steel wire, recovery bag has another 20m plus snatch strap. I was thinking a length of rope, say 50m could be handy when the anchor point is just that too far away. And it's cheap & light. Even doubled over it would give me an extra 25 m, or 60 m in total.

[101RRS]

Ok - so essentially a winch extension strap. Why not just by a winch extension strap, they come in different lengths, can be joined and are rated.

If you specifically want rope then it needs to be rated - I guess the same as the wire rope. To be safe I would use plasma/dymeea rope as it is rated and easy to get. You would have to go to a specialist rope supplier to get rated "normal" nylon/poly rope.

Garry

[weeds]

Ok - so essentially a winch extension strap. Why not just by a winch extension strap, they come in different lengths, can be joined and are rated.

If you specifically want rope then it needs to be rated - I guess the same as the wire rope. To be safe I would use plasma/dymeea rope as it is rated and easy to get. You would have to go to a specialist rope supplier to get rated "normal" nylon/poly rope.

Garry

I consider the off the shelf extension straps but they are more bulky than plasma

[Xtreme]

A plasma extension strap can also be used with a snatch block.

[Ancient Mariner]

Forget nylon for use with a tirfor ext As nylon has the most strech of any rope you will be cranking for yonks before taking the strain Spectra or Dyneema the dearest but strongest with bugger all stretch:eek:

AM

[Barefoot Dave]

G'Day Andy.
Rope strenghts here:
Nylon Rope - Strength (http://www.engineeringtoolbox.com/nylon-rope-strength-d_1513.html)

With the price of Dyneema/ Plasma, I would just get a length to use as an extension. Oh wait, that IS what I have done ;)
$100 for 30m with reassurance tha tit will perform as required AND be more abrasion resistant.

[AndyG]

Thanks all for the advice, now to do some investigating,

Dave, i saw that table and was guesstimating that 14mm would be about right.
And you really cant have too much rope, even if its to throw a canvas over etc.

[Dorian]

Andy
To answer your question.
12mm Nylon is usually around 3000Kg breaking strain, 14mm 4000Kg and 16mm around 5000Kg Say about 1/3 or less working load. I doubt that you will find SWL for Nylon ropes as it depends upon how much stretch the application can handle for the supplier to give you a SWL.

So I'd be going at least 14mm
I don't want to tell you how to suck eggs but nylon stretches a lot and if it breaks under load, at best a frayed rope end, but at worst a D shackle, with a lot (probably a heck of a lot) of speed may be comming to a face near you.:(

But I recon that a rope hanging around has a lot more other uses than a strap etc.
You might want to consider Polyester rope, which costs more but has a lot less stretch, unfortunately you would have to go up a size to match the breaking strength of Nylon.

Cheers Glen

[AndyG]

Thanks Glen, for the tip on polyester, it's something to throw in the back and hopefully never use, but there may be the time when the anchor point is that little bit too far.

[steveG]

I did a similar thing - bought a 50m length of Dyneema, and cut it in half. Half on the winch, half as an extension or other use, or replacement winch rope. Light and easy to create a reasonable splice in the field.

The ropes they use for sailing (I think polyester with a braided cover - not spectra type) are really nice to work with, and pretty abrasion resistant. Not sure how the prices/diameters would work out in the strength you are seeking though.

Nylon definitely has too much stretch. Stunned myself senseless (and probably lucky it wasn't worse) in an incident involving a long nylon rope and a hammer when I was a young bloke.
I'm very wary of elasticity in things now!!

Steve

[Tank]

Nylon rope is dangerous to use for winching or towing out of a bog or lifting anything.
It will stretch to it's limit and then either snap or rebound, usually with bad conequences.
Dynemma type rope is ok as it has limited stretch and will not rebound, Regards Frank.

[Tank]

There is NO SWL for nylon rope, it is TOTALLY banned in the Rigging, Mining and Industrial areas that involve lifting or dragging loads.
If you use Nylon rope in a recovery situation you may kill yourself or some bystander.
DO NOT USE NYLON ROPE TO RECOVER OR LIFT A LOAD.
Tie loads down, hold up a tent no problem.
Anyone here or in the retail rope industry that says it's OK to use a Nylon rope for recovery or lifting has NO IDEA of what they are talking about.
AGAIN, DO NOT USE NYLON ROPE IN A RECVERY OR LIFTING SCENARIO.
Regards Frank.