Yale Kernmaster?- Rope Wrench?

C

caorann

Just wondered if anyone had much experience of Kernmaster? I'm sure I've read somewhere it's got pretty impressive energy absorption capabilities. Just wondering if it'd be ok to use as a working srt line with rope wrench. Any suggestions for prussic cord to use with it?
Currently using tachyon and playing around with VT with 8mm armour prus (0.9m- bit long though) and going to try 10mm OP(0.85m).
Initially using unicender and DMM revolver without then with wrench. Unicender much better in descent now with wrench but edge to hitchclimber/prussic with wrench imo
Any advice/suggestions gratefully accepted. Thanks.
Ken
 
If you are saying it has a lot of stretch I think it would be a bad option for SRT. SRT will have twice the bounce as ddrt not even including the energy abrorbtion of the tree and multiple redirects.

THere are time when I have so much stretch because of my redirects it acts like a spring and I can pull my self down and shoot up to a higher crotch like a catapult. I would recommend avoiding adding any additional stretch into the system. Maybe in certain situations. Spar work it might be good to have a little bounce in your rope.
 
No it shouldn't have a lot of stretch and that's not what I'm looking for -from the Yale website -'Static-rappelling Kernmaster line is constructed with a traditional “mantle” sleeve consisting of 48 strands of polyester. The inside, or “kern,” is a braided core of energy absorbing nylon'.
So as far as I understood although a static line it also has(apparently impressive in comparison to other static lines) energy absorbing capabilities when shock loaded making it a much better choice I thought for 'working from' SRT than other 'ordinary' statics ?
Can anyone else recommend any other 11mmish ropes if no one knows about Yale Kernmaster? Thanks
 
I agree, so am I.
Graphs from Yales website seem to indictate that Kernmantle static ropes like Kernmaster have a greater ability to absorb force from falls than many arborist ropes.
More info on Kernmaster:-
'Yale Kernmaster represents a quantum leap in Static Life Rescue Lines. Comprising a unique construction of a 48 strand Polyester cover and a braided Nylon core Yale Kernmaster offers handling and performance never before available in a Static Life Rescue Line.

These are some of the advantages Kernmaster offers over other brands of Static Life Rescue Lines.

POLYESTER/ NYLON CONSTRUCTION: Provides a greater range of chemical resistance than the traditional Nylon/ Nylon construction. It is unlikely to encounter a chemical that would affect both the cover and core.

48 STRAND POLYESTER COVER: Provides excellent feel and handling through devices.

BRAIDED CORE: Core bends more easily with less fatiguing. This makes for better knotability, better control through mechanical ascent/ descent devices, as well as increased strength. Also, in the event of a cover failure, the rope core will remain intact, allowing the user to ascend/ descend over the core to get back to a stable portion of rope. Yale Kernmaster is the only life rescue line that uses braided core technology.

STEAM STABILIZED CORE: The core is fully steam stabilized which enhances the rope flexibility and prevents hardening during service.

AVAILABLE LENGTHS: Kernmaster is available in continuous lengths of up to 700m.

WATER RESISTANT: Having a Polyester cover, Kernmaster sheds water far more readily than a traditional nylon/ nylon construction. Also the druing time of the rope is dramatically reduced due to the Polyester being non hydroscopic.
Due to Kernmasters water shedding ability, it will not stiffen when wet, and will still run through mechanical devices with ease.

Kernmaster is CE and NFPA certified as well as being AS4142.3-1993 compliant.

Increasingly popular in the Industrial Rope Access/ Rescue and Arborist markets, why not give this exceptional rope a try.

Tensile Strength: 3,225kg"

So anyone out there used it???
 
Polyester core vs. nylon core in a static kernmantle is an interesting question. For example here are the specs for Bluewater II 10.5mm static (this rope has a braided nylon core and a polyester sheath)

Elongation:
@ 300 lbf. = 3.8%
@ 600 lbf. = 6.9%
@ 1000 lbf. = 8.9%

Other nylon core static ropes like 11mm NE Ropes KMIII have a similar load/elongation curve.:

3.6 @ 1.35 kN (300 lbf)
6.5 @ 2.70 kN (600 lbf)
9.5 @ 4.40 kN (1000 lbf)

Question is do polyester core statics like Sterling HTP have a similar elongation curve or is it flatter? If a nylon core gives a climber greater stretch at higher loads than a polyester then it could be argued it is safer for accidental dynamic loading scenarios.

I haven't been able to find any elongation specs for any polyester core statics across 300, 600 and 1000 lb. loads. If anyone can find any it might shed some light.
-AJ
 
benn climbing a little this week, and I'm loving this rope. Like I said before, this is my first static line, so I cant really compare it to anything. runs well through mechanical devices, low stretch (I think), and i have zero complaints.

Sorry I couldnt help much, hope you are happy with whatever you go with.
 
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