km3 ?

Regarding elongation...Yale is really good about publishing the elongation of their ropes on nice little graphs that (I think) are easy to understand. Click on this pdf: Click Here and scroll down. You can see how it works. It's one of my pet peeves when someone says to me, "this ropes stretches X %." That's not how it works. It's all relative to the load on the rope at that given moment.

I found the same info for NE Ropes. Click Here to see it.

Samson gives the info, too, but not nearly as detailed: Click Here

love
nick
 
Acronyms loose their power when they have to be defined every time they're used

Ah, yes, Grasshopper, but they loose their meaning when they become confused. /forum/images/graemlins/grin.gif
 
[ QUOTE ]
DRT - Generic term for doubled rope tree climbing. Commonly used as interchangable with DdRT.


[/ QUOTE ]

But they shouldn't be interchangable. That only happens when the acronym is used by someone who doesn't know the difference between the two techniques. It may take a lot of repeating, but I think in the long term it is better to have separate, distinct definitions. You described them very well:

[ QUOTE ]
DdRT - Doubled Rope Technique
Climbing on two sides of the rope. One side anchored to saddle the other side anchored to the saddle with a friction hitch.

[/ QUOTE ]

and:


[ QUOTE ]
For high angle climbing (caving, rock etc.) Double Rope Technique covers two separate systems

[/ QUOTE ]

Two separate anchor points, two separate systems.


[ QUOTE ]
And what about footlocking on a doubled rope with a prusik (or double ascender) around both legs of the rope? If that's called DdRT then we lose a specific term.

[/ QUOTE ]

Actually it gets even more specific. That would be a static DdRT, compared to a dynamic DdRT which you described above.
 
[ QUOTE ]

Actually it gets even more specific. That would be a static DdRT, compared to a dynamic DdRT which you described above.

[/ QUOTE ]

Excellent! Using the term static or dynamic with DdRT solves that problem nicely.
 
So, now that Mahk has rescued our verbiage, I have the right words and acronyms to pose a question that returns to the original question asked by Louis...

First, it's safe to say the following:
For climbing static DdRT, a static rope like KM3 will work great. Perhaps better than a trad arborist rope, the stiff feel of the rope would be great for footlocking.

The question:
Is it ok or useful or otherwise good or bad to use a static line like KM3 for dynamic DdRT? Assuming you have to use a split tail. Leaving Fly, Velocity, Poison Ivy etc. out of the equation since they are static ropes designed for dynamic or static climbing.

Jim from Baltimore mentioned that he's climbing KM3 for dynamic DdRT and it works great.

Comments?
 
I've used KMIII for dynamic DdRT in rec climbing, but with a 4" pulley block on the false crotch. Worked like a dream! I think going through the smaller pulley is more difficult with this rope.

Thanks Mahk for setting good words to good ideas.
 
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