Hitchclimber
- Thread starter Rookieclimber
- Start date
- Location
- Rannoch, Scotland
Nick. Apologies to all non-Brits, 'Pete Tong' is rhyming slang for the word 'wrong'.
Sherrill have had one delivery of Hitch Climbers (with rather fetching gold cheekplates). If they have sold out, the next delivery should be leaving Wales at the end of next week.
Pete. I'm very sorry to hear of the issue today....and for our delay in making the Hitch Climbers Guide available. On page 6 there is a section on 'misconfigurations' that pictures exactly your setup. Compact terminations are necessary in a Hitch Climber system. Apologies again.
Chris
Treemagineers - all for the trees and none for a fall.
Sherrill have had one delivery of Hitch Climbers (with rather fetching gold cheekplates). If they have sold out, the next delivery should be leaving Wales at the end of next week.
Pete. I'm very sorry to hear of the issue today....and for our delay in making the Hitch Climbers Guide available. On page 6 there is a section on 'misconfigurations' that pictures exactly your setup. Compact terminations are necessary in a Hitch Climber system. Apologies again.
Chris
Treemagineers - all for the trees and none for a fall.
TreeCo
Carpal tunnel level member
[ QUOTE ]
This is a great piece of kit IMO, I love how tidy it makes the system and tends, but people should be VERY carefull of using it with termination knots.
[/ QUOTE ]
An anchor hitch with it's tail tucked in on the side of the biner away from the pulley should have the same overhang profile as a spliced eye.
It may be that having both anchor points in such a straight line is not so good an idea no matter how the rope is terminated. It looks like when descending and body weight is put on the line that the hand on the knot is in a pinch point.
This is a great piece of kit IMO, I love how tidy it makes the system and tends, but people should be VERY carefull of using it with termination knots.
[/ QUOTE ]
An anchor hitch with it's tail tucked in on the side of the biner away from the pulley should have the same overhang profile as a spliced eye.
It may be that having both anchor points in such a straight line is not so good an idea no matter how the rope is terminated. It looks like when descending and body weight is put on the line that the hand on the knot is in a pinch point.
- Location
- NJ
Just received mine yesterday from treeworker. Pruned 12 trees today with it and was very pleased. I had it only catch once on the krab one the first tree but after that everything was good. I really like how it tends and how the pulley stays in a fixed position. Though I was using it with a petzel tri-act d, it seemed to sit pretty straigh but I guess I will try the ok with my next order.
From the look of it I might have to try using the middle hole with another ok krab and a fixe micro for double TIPs along with a swivel. That way the rope will tail out at 2 different ends.
From the look of it I might have to try using the middle hole with another ok krab and a fixe micro for double TIPs along with a swivel. That way the rope will tail out at 2 different ends.
NickfromWI
Participating member
- Location
- Los Angeles, CA
Is there a triple auto locking version of the OK?
I prefer D or HMS shaped biners anyways...I know I won't switch.
Pete, splice that rope before things go Pete Tong again!
love
nick
I prefer D or HMS shaped biners anyways...I know I won't switch.
Pete, splice that rope before things go Pete Tong again!
love
nick
- Location
- NJ
The ones from Sherrill say tri-act so I would assume so.
Kind of off subject but back to Rupe's fixe setup. I climbed for awhile with one end of my eye and eyes spliced to the "becket" of a fixe. I got the idea from an Arbormaster guy who told me "Petzl said it is O.K"...Then I had a nightmare that it broke and I fell to my death. I can’t climb on them any more. Anyway I have a few fixes sitting around and would love to donate them to someone who could break them for us. It would be nice to know just how strong those silly little beckets are.
- Location
- Watertown, WI
Nick: My guess is that you can still get one from sherrill before june. Give em a call, they sent me my gold HC which as Chris descrobed earlier as having "rather fetching gold cheekplates". What is the worst that can happen, you go online, order it and if its on back order you get one when they send ya one.
Jumbomonkey: I hate dreamin' about any of the "bad things" that can happen to any of us. They are a nice and safe reminder of how quickly all we have can go bye bye.
Jumbomonkey: I hate dreamin' about any of the "bad things" that can happen to any of us. They are a nice and safe reminder of how quickly all we have can go bye bye.
- Location
- Bloomington, Indiana
Nick wrote:
[ QUOTE ]
Is there a triple auto locking version of the OK?
[/ QUOTE ]
I don't know.
Climber 020 wrote:
[ QUOTE ]
The ones from Sherrill say tri-act so I would assume so.
[/ QUOTE ]
Tri-Act is short for Triple Action which is not the same as a triple-locking 'biner.
Think of this progression:
--non-locking 'biners ( = single-action): push the gate and they open; no locking mechanism, but one action is required to open the gate
--single-locking 'biners (= double-action): twist lock, screw lock; one locking mechanism thus two actions are required to open the gate (one action to unlock the gate and one more action to open the gate)
--double-locking 'biners ( = triple-action): ball lock, push and twist lock; two locking mechanisms, thus three actions are required to open the gate (two actions to unlock the gate and one more action to open the gate).
[ QUOTE ]
Is there a triple auto locking version of the OK?
[/ QUOTE ]
I don't know.
Climber 020 wrote:
[ QUOTE ]
The ones from Sherrill say tri-act so I would assume so.
[/ QUOTE ]
Tri-Act is short for Triple Action which is not the same as a triple-locking 'biner.
Think of this progression:
--non-locking 'biners ( = single-action): push the gate and they open; no locking mechanism, but one action is required to open the gate
--single-locking 'biners (= double-action): twist lock, screw lock; one locking mechanism thus two actions are required to open the gate (one action to unlock the gate and one more action to open the gate)
--double-locking 'biners ( = triple-action): ball lock, push and twist lock; two locking mechanisms, thus three actions are required to open the gate (two actions to unlock the gate and one more action to open the gate).
- Location
- Rannoch, Scotland
Nick
We tested configured HC systems on DMM 'Fat Boy' HMS karabiners with the cordage and pulley at the wide end. This is a very sturdy karabiner made from round section aluminium (not an optimised cross section). They broke at 20-21kN (rated at 25kN, would normally break at approx 27kN). The disadvantage of an HMS here means that the karabiner can not be rotated (should you wish to do that). The bulk of the sling terminations and pulley is too much for the smaller end of the karabiner.
The Petzl OK Triact is rated at 24kN. In our configured tests, it was breaking at over 28kN.
Oval karabiners are the correct shape for the loading pattern in the HC system.
In the images that Mark and Wolter posted there is a prototype hot forged Oval from DMM with a 'Locksafe' gate (double locking/three action). This 'biner is shorter than the Petzl OK. That is significant because any length saved in the attachment 'biner means that the adjustment end of the friction hitch is closer to the climber. And as we all know, in those difficult positions, every little bit of length helps!
The DMM Oval should be in production for August.
Chris
Treemagineers - all for the trees and none for a fall!
We tested configured HC systems on DMM 'Fat Boy' HMS karabiners with the cordage and pulley at the wide end. This is a very sturdy karabiner made from round section aluminium (not an optimised cross section). They broke at 20-21kN (rated at 25kN, would normally break at approx 27kN). The disadvantage of an HMS here means that the karabiner can not be rotated (should you wish to do that). The bulk of the sling terminations and pulley is too much for the smaller end of the karabiner.
The Petzl OK Triact is rated at 24kN. In our configured tests, it was breaking at over 28kN.
Oval karabiners are the correct shape for the loading pattern in the HC system.
In the images that Mark and Wolter posted there is a prototype hot forged Oval from DMM with a 'Locksafe' gate (double locking/three action). This 'biner is shorter than the Petzl OK. That is significant because any length saved in the attachment 'biner means that the adjustment end of the friction hitch is closer to the climber. And as we all know, in those difficult positions, every little bit of length helps!
The DMM Oval should be in production for August.
Chris
Treemagineers - all for the trees and none for a fall!
NickfromWI
Participating member
- Location
- Los Angeles, CA
[ QUOTE ]
We tested configured HC systems on DMM 'Fat Boy' HMS karabiners ...They broke at 20-21kN (rated at 25kN, would normally break at approx 27kN).
[/ QUOTE ]
I way LESS than 1kN. So even if they broke below the rated strength because we are kind of misusing them, I still have well over a 20:1 safety factor. That is more than enough for me.
I have a couple ovals. I'll give them a shot just to see if it's tolerable.
love
nick
We tested configured HC systems on DMM 'Fat Boy' HMS karabiners ...They broke at 20-21kN (rated at 25kN, would normally break at approx 27kN).
[/ QUOTE ]
I way LESS than 1kN. So even if they broke below the rated strength because we are kind of misusing them, I still have well over a 20:1 safety factor. That is more than enough for me.
I have a couple ovals. I'll give them a shot just to see if it's tolerable.
love
nick
- Location
- Austin, TX
Re: Hitchclimber *DELETED*
Post deleted by Tom Dunlap
Post deleted by Tom Dunlap
- Location
- Watertown, WI
easy fellas, this thread may be paused but only because of people getting side-tracked, thats usually the common link between most threads, off subject converstaions stir and the original problem doesn't get solved. anyone else have something useful to say about the HC?
i used my hitch climber directly on the bridge today so it was set up sideways on, i got on a lot better with it in this manner
- Location
- Home of the New Jersey Devils
[ QUOTE ]
Matt
Have you tried moving the top 'biner to the middle hole? This tends to cant the HC away from you a bit, into the running part of the line.....
Chris
Treemagineers - all for the trees and none for a fall!
[/ QUOTE ]
I prefer it in the middle hole as well. Keeps the hitch a little further away from the line.
Matt
Have you tried moving the top 'biner to the middle hole? This tends to cant the HC away from you a bit, into the running part of the line.....
Chris
Treemagineers - all for the trees and none for a fall!
[/ QUOTE ]
I prefer it in the middle hole as well. Keeps the hitch a little further away from the line.
- Location
- Basel, Switzerland
Re: Hitch Climber
Should you wish to dig a bit deeper into the rationale behind the Hitch Climber, Treemagineers.com is - finally - on-line. From the site you can download the "Hitch Climbers' Guide to the Canopy" which explains a bit about the how and why behind the Hitch Climber and shows alternate configs.
Also please note the colourful pics in the HCGTTC, me likee!
Should you wish to dig a bit deeper into the rationale behind the Hitch Climber, Treemagineers.com is - finally - on-line. From the site you can download the "Hitch Climbers' Guide to the Canopy" which explains a bit about the how and why behind the Hitch Climber and shows alternate configs.
Also please note the colourful pics in the HCGTTC, me likee!
- Location
- Manchester UK
Re: Hitch Climber
While browsing through the hitchclimbers guide, i noticed a picture of a 3 way locking DMM revolver. Could any Treemagineers shed any light on this mysterious beast?
While browsing through the hitchclimbers guide, i noticed a picture of a 3 way locking DMM revolver. Could any Treemagineers shed any light on this mysterious beast?
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