prusik rope advice
- Thread starter Ghivelder
- Start date
NickfromWI
Participating member
- Location
- Los Angeles, CA
Ghivelder, good question! For your application, I'm not sure it matters too much. They are similar pricewise. The aracom-T is a bit stronger, and higher breaking strengths impress customers. But they are both sooooo much stronger than they need to be for use as a prusik cord. Another thing to consider is resistance to breakdown from UV exposure. But both the lines you mention are double braids with the same polyester cover, so again- it doesn't matter.
The most important factor, Rocky already mentioned. I don't think these lines are worth their money when used in double-braid form as a prusik cord or friction hitch. You are paying for strength....too much strength. A friction hitch should more importantly be judged by how it grabs/lets go/descends. A polyester double braid may better serve you (Double Esterlon is about 1/5th the price of the two you mentioned).
And for what it's worth, I am putting my money on the best friction hitch being a single braid high-tech line.
love
nick
The most important factor, Rocky already mentioned. I don't think these lines are worth their money when used in double-braid form as a prusik cord or friction hitch. You are paying for strength....too much strength. A friction hitch should more importantly be judged by how it grabs/lets go/descends. A polyester double braid may better serve you (Double Esterlon is about 1/5th the price of the two you mentioned).
And for what it's worth, I am putting my money on the best friction hitch being a single braid high-tech line.
love
nick
I don't know arborist rope, but in rock climbing and rope rescue a prusik must be made from a cord which retains its roundness when loaded (so it will bite into the host rope), and yet be supple enough so that it sets well and stays set on the host rope. Coated cord may not grab as well as uncoated.
- Location
- Home of the New Jersey Devils
Well said RescueMan.
The problem with arborists is that we use rope in a little different fassion than most- we go up and down without changing over systems or gear. We also stay on a 2 to 1 MA system. This being said, we don't use a standard prusik like most (as a grab on the rope), rather we use it to ascend and descend. The difference also is that 1/2 our weight is supported by the knot (theoretically).
We also have a tendency to tweak knots to our liking. We add a wrap, a twist here, try it with a loop or a strand of cord... We get a little off the charts. So, a prusik cord that is ideal for grabbing a rope without letting go would be the safest, but might not be effiecient enough for everyday use as we use it. In otherwords, sometimes we walk the line between how quick a cord will grab and how well it will release (to move up). That's why so many of us have these different knots we try in the field that soon become main stream. For example, the french prusik, machard tresse, valdotain, XT, Distel and so on.
Does this make sense?
Do you ever try any exotic fiber cord in the rescue world?
The problem with arborists is that we use rope in a little different fassion than most- we go up and down without changing over systems or gear. We also stay on a 2 to 1 MA system. This being said, we don't use a standard prusik like most (as a grab on the rope), rather we use it to ascend and descend. The difference also is that 1/2 our weight is supported by the knot (theoretically).
We also have a tendency to tweak knots to our liking. We add a wrap, a twist here, try it with a loop or a strand of cord... We get a little off the charts. So, a prusik cord that is ideal for grabbing a rope without letting go would be the safest, but might not be effiecient enough for everyday use as we use it. In otherwords, sometimes we walk the line between how quick a cord will grab and how well it will release (to move up). That's why so many of us have these different knots we try in the field that soon become main stream. For example, the french prusik, machard tresse, valdotain, XT, Distel and so on.
Does this make sense?
Do you ever try any exotic fiber cord in the rescue world?
</font><blockquote><font class="small">In reply to:</font><hr />
a prusik must be made from a cord which retains its roundness when loaded, and yet be supple enough so that it sets well and stays set on the host rope.
[/ QUOTE ]
I tried a Spectra/ Technora cord when I first started with advanced hitches (New England T-900) and found it too stiff to grab easily. Of course, I did not realize this until I used the regular double braid polyester cord (New England Sta-Set). I will never go back to the T-900 because it doesn't grab as well. It has nothing to do with price.
I'm not trying to persuade anyone away from Yale ropes, but I can only comment on what I know. I am under the impression that these New England ropes are comperable to the Yale ropes being discussed, so the same logic should apply to both brands.
Here is the T-900: http://www.sailnet.com/store/item.cfm?pid=12186
and here is the Sta-Set: http://www.sailnet.com/store/item.cfm?pid=27014
a prusik must be made from a cord which retains its roundness when loaded, and yet be supple enough so that it sets well and stays set on the host rope.
[/ QUOTE ]
I tried a Spectra/ Technora cord when I first started with advanced hitches (New England T-900) and found it too stiff to grab easily. Of course, I did not realize this until I used the regular double braid polyester cord (New England Sta-Set). I will never go back to the T-900 because it doesn't grab as well. It has nothing to do with price.
I'm not trying to persuade anyone away from Yale ropes, but I can only comment on what I know. I am under the impression that these New England ropes are comperable to the Yale ropes being discussed, so the same logic should apply to both brands.
Here is the T-900: http://www.sailnet.com/store/item.cfm?pid=12186
and here is the Sta-Set: http://www.sailnet.com/store/item.cfm?pid=27014
Thanks everybody for the feedback...
The reason I want to buy a high-tech line is mainly because they are unavaiable in Italy.
I presently deal with Beal's Regate (10mm only polyester) which is excellent for a Distel but not so good for a VT. The reason being that although it will stay round, it is a "soft" rope and it will coil and than extend too much (with a VT) before grabbing the rope. I think a VT asks for stiffer rope...
I agree that staying round is maybe the most important thing in an advanced hitch rope and that the extra strengh is quite unnecessary. Still (and I'm now speaking as a vendor), it's nice to be able to tell clients that that tiny 8mm rope is so strong. I’m also thinking of other applications like a stopper knot in a MA system made with pulleys.
In fact, let me ask you all a new question: What would you use a 5/16” technora core line for?
Sergio
The reason I want to buy a high-tech line is mainly because they are unavaiable in Italy.
I presently deal with Beal's Regate (10mm only polyester) which is excellent for a Distel but not so good for a VT. The reason being that although it will stay round, it is a "soft" rope and it will coil and than extend too much (with a VT) before grabbing the rope. I think a VT asks for stiffer rope...
I agree that staying round is maybe the most important thing in an advanced hitch rope and that the extra strengh is quite unnecessary. Still (and I'm now speaking as a vendor), it's nice to be able to tell clients that that tiny 8mm rope is so strong. I’m also thinking of other applications like a stopper knot in a MA system made with pulleys.
In fact, let me ask you all a new question: What would you use a 5/16” technora core line for?
Sergio
NickfromWI
Participating member
- Location
- Los Angeles, CA
I have a length of 5/16ths vectran that is run through
some pulleys for a mechanical advantage setup.
A similar setup would be good for someone who uses the portawrap a lot and occasionaly needs lifting capabilities.
love
nick
some pulleys for a mechanical advantage setup.
A similar setup would be good for someone who uses the portawrap a lot and occasionaly needs lifting capabilities.
love
nick
I just found a very interesting paper on test results of high-tech cords. The link was posted on the Proclimber board.
http://www.xmission.com/~tmoyer/testing/High_Strength_Cord.pdf
http://www.xmission.com/~tmoyer/testing/High_Strength_Cord.pdf
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