Why not skip the ring altogether and just use a Prusik knot? Seems like it's essentially the same thing without the weight of the ring.
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Why not skip the ring altogether and just use a Prusik knot? Seems like it's essentially the same thing without the weight of the ring.
Ah, makes sense. I'm not an amsteel user yet so don't know its properties.
This has a mechanical advantages over a Prusik. Just like a whoopie sling, both ends of the outer line are under tension causing it to constrict on the adjustable buried line going through. The purpose of the ring is to keep the outer line from unwinding and forcing it to constrict when tensioned.
In a Prusik Knot, the line passing through the knot is under tension and the loops of the knot are wrapped around with tension on one end, but not constricting. The shape of the knot attempts to force a twisting action on the interior line assisting in it gripping the interior line so that it doesn't slip.
In the case of a suspension where the line is under high tension - resisting the twist - and the amsteel is very slippery a prusik just slips. Ditto for a taut-line hitch.
Properties; VERY strong, super low stretch, easy to splice, very slippery so doesn't hold most knots v.well!
Stu at whoopieslings.com sells climbing rated descender rings.
http://shop.whoopieslings.com/SMC-De...ally-81600.htm
Mike
So, do I have this right? The "under" rope simply rides next to the ring, and the part that loops around the under rope and the ring has one end under tension and the other hanging loose?
The line is under tension in both directions. One end is pulled by the hammock the other end is pulled by the suspension. The tail is in fact hanging loose.