advice on prusik loop ropes
- Thread starter Ghivelder
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Lumberjack
Banned
Why just those 2? Rocky and others rave about Sta-Set and a few others, but I have never heard those 2 mentioned here before.
murphy4trees
Addicted to ArboristSite
Sounds like he has a deal with yale....
Well you've only got two choices so that won't take a lot of research..... Let us know what you come up with and I'd like to know more about the yale deal...
Thanks.....
Does anyone know a good translating site, so we can read Ghivelder's website???
Well you've only got two choices so that won't take a lot of research..... Let us know what you come up with and I'd like to know more about the yale deal...
Thanks.....
Does anyone know a good translating site, so we can read Ghivelder's website???
Lumberjack
Banned
I know this thread will soon get side tracked into talking of other ropes... The point is that I'm a Yale importer in Italy and I'm adding a reel of 5/16" rope to a big order. So I must choose between one of those two...
Aracom T has a Technora core while Crystalyne has a Vectran core. Both have polyester sleeves.
Anyone out there that has used them???
Sergio
Aracom T has a Technora core while Crystalyne has a Vectran core. Both have polyester sleeves.
Anyone out there that has used them???
Sergio
Lumberjack
Banned
In my brief spaz with friction hitches, I used Ultra Tech, which has a techrnora core, if I remember right.
On thing that most people are gonna say is that the more expensive "cored" ropes arent worth the money, as the cover wears the same as any other rope.
I would say Aracom T, but that isn't a very educated(some) guess. Send an email or PM nickfromWI, he is a huge rope buff, and a yale nut.
On thing that most people are gonna say is that the more expensive "cored" ropes arent worth the money, as the cover wears the same as any other rope.
I would say Aracom T, but that isn't a very educated(some) guess. Send an email or PM nickfromWI, he is a huge rope buff, and a yale nut.
Lumberjack
Banned
HAHAHAHAHA
ROTFLMFAO
NickfromWI
Addicted to ArboristSite
Carl, you know squirrells love sweet apples!!!
Ghivelder, I put a post at treeebuzz about the same thing...check it out!Treeebuzz post
love
nick
Ghivelder, I put a post at treeebuzz about the same thing...check it out!Treeebuzz post
love
nick
Last edited:
John Paul Sanborn
Above average climber
Nick you coulda copied it over to here!
NickfromWI
Addicted to ArboristSite
John Paul, I posted this one here instead of Treeebuzz!
I've read those results a while ago. I have one point to raise about the validity of the test. One of the general conclusions you should walk away with is that it's better to stick with good-ole nylon, and leave the vectran and technora at home.
In a kernamantle rope (all nylon) much of the strength is in the core, but the cover helps, too. For the xmission testing, they compared a 7mm nylon cord to the vectran/technora cordellette cords. It is the cover, not the vectran/technora itself that makes the rope so stiff. The same can be seen in lines that we arborists are more familiar with like t-900 and ultratech.
Due to the high strengths of these cordellettes, the manufacturers made them in a smaller diameter and usually add a very tightly woven cover to add chafe protection.
(for those of you not familiar with the rock climber's use of a cordellette, it is often hung over the edge of a rock face with a climbing line dangling from it. This is what catches the climber when she/he falls. These cordellettes need to be reasonably tough so theat they do not break while being weighted over sharp edges.)
So now it turns out they were comparing a 7mm nlyon to a 5mm high tech line. The nylon has an advantage off the bat, just because it's bigger!
But wait, it get's better. In these high tech lines, the cover is there not for strength, but for protection from chafing, the sun, and other things that might want to destroy the vectran So in these lines, all the strength is in the core. To give the point, take what the xmission testers wrote about the knotted breaking of some of these high tech lines
...For a double fisherman's knot, Gemini and Titan share an interesting failure mode. The sheath breaks at the knot and the slippery core unties, pulling through the sheath...
Both the 5mm Sterling Vectran and the 5mm Gemini (technora) cord have cores of about 3mm, an eight of an inch. The xmission testers were testing a 7mm nylon to other lines about half the size, only 3mm! The vectrans and technoras broke around where they should for a line of such small diameter.
It should be stated that high-modulus lines do not lend themselves well to knotting. These same diameter lines would break much higher if they were spliced, rather than knotted.
I don't want to discredit the work they've done. They have provided some good hard scientific facts. But keep in mind that these facts are not blanket statements. I fully disagree with them when they say ...Nylon cord and webbing may be the best of all. There are applications where one should shy away from the high-modulus lines. But there are other places where you just can't beat the vectrans and technoras!
Climb safe!
love
nick
I've read those results a while ago. I have one point to raise about the validity of the test. One of the general conclusions you should walk away with is that it's better to stick with good-ole nylon, and leave the vectran and technora at home.
In a kernamantle rope (all nylon) much of the strength is in the core, but the cover helps, too. For the xmission testing, they compared a 7mm nylon cord to the vectran/technora cordellette cords. It is the cover, not the vectran/technora itself that makes the rope so stiff. The same can be seen in lines that we arborists are more familiar with like t-900 and ultratech.
Due to the high strengths of these cordellettes, the manufacturers made them in a smaller diameter and usually add a very tightly woven cover to add chafe protection.
(for those of you not familiar with the rock climber's use of a cordellette, it is often hung over the edge of a rock face with a climbing line dangling from it. This is what catches the climber when she/he falls. These cordellettes need to be reasonably tough so theat they do not break while being weighted over sharp edges.)
So now it turns out they were comparing a 7mm nlyon to a 5mm high tech line. The nylon has an advantage off the bat, just because it's bigger!
But wait, it get's better. In these high tech lines, the cover is there not for strength, but for protection from chafing, the sun, and other things that might want to destroy the vectran
So in these lines, all the strength is in the core. To give the point, take what the xmission testers wrote about the knotted breaking of some of these high tech lines...For a double fisherman's knot, Gemini and Titan share an interesting failure mode. The sheath breaks at the knot and the slippery core unties, pulling through the sheath...
Both the 5mm Sterling Vectran and the 5mm Gemini (technora) cord have cores of about 3mm, an eight of an inch. The xmission testers were testing a 7mm nylon to other lines about half the size, only 3mm! The vectrans and technoras broke around where they should for a line of such small diameter.
It should be stated that high-modulus lines do not lend themselves well to knotting. These same diameter lines would break much higher if they were spliced, rather than knotted.
I don't want to discredit the work they've done. They have provided some good hard scientific facts. But keep in mind that these facts are not blanket statements. I fully disagree with them when they say ...Nylon cord and webbing may be the best of all. There are applications where one should shy away from the high-modulus lines. But there are other places where you just can't beat the vectrans and technoras!
Climb safe!
love
nick
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