/ Ashley's stopper knot - thoughts?
Generally I use double overhands, though yesterday I thought I'd see how this knot went jamming in an ATC - didn't budge or roll under body weight.
Never actually seen anyone use it, or a climbing book suggest it, but it seems fit for purpose (easier to untie, and bulkier than a double overhand, and presumably doesn't roll if Ashely suggests it(?)).
( http://en.wikipedia.org/wiki/Ashley%27s_stopper_knot )
for what purpose are you using it.
if its to stop you belaying off the end of the rope, then yes its fit for purpose.
if its for tying to finish your Fo8, then its no easier to tie.
you said about jamming in the atc so guessing the first sentence
That said, I can't see any reason why Ashley's knot wouldn't work just as well for that purpose, so long as you can reliably tie it correctly.
It is important to take the Wikipedia instruction's "2.Tighten the overhand portion of the knot around the standing part" seriously --*seriously* tighten it in tying, for loading will NOT : the risk is that the noose will fold and pull the tail through (and, yes, that will take much force).
If you tie the overhand in mirror image (i.e., reverse every crossing's over/under of the >>overhand<< itself (but not of the main line it's tied around), you will have a similarly bulked-into-trefoil stopper that cannot pull the tail through (as the part pulling pulls upon not only the tail but around the rim of the trefoil). This knot is less quickly formed than forming the overhand noose (backwards "slip knot", if you will), but hardly difficult.
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