NZcaver wrote:When I mentioned using the lower bollard as a pulley substitute, I meant just the lower bollard - no upper bollard, no progress capture function.
I guessed as much just though I'd say it can be used as a progress capture.
NZcaver wrote:Now I've also seen that Petzl Stop 3:1 diagram you showed, and I recall I tried it out one time. However I've never seen anybody rig it for practical use - anyone? It sure looks like it would introduce a lot of friction and inefficiency into the system, but I guess some people may find it useful in a pinch.
I can't remember where I saw it but I remember seeing just the lower bollard threaded but the tail comes up between the two bollards which means the Stop feature is operable, however this is not what Petzl show so it's probably no an approved use.
NZcaver wrote:Regarding your comment about the Stop not being hugely strong - the figures are obviously much lower than regular pulley ratings, but I'm not really seeing that as critical in this improvised/occasional use/single person load application. I also understand that more friction in the system means a potentially higher load on anchors and other components, but if you're only using the lower bollard it can't be any worse than using just a carabiner in place of a pulley can it?
Not worse than the carabiner as a pulley, just thought I'd say there are limitations to it's use as a pulley and / or progress capture which anyone using it as such should be aware of and that its use is possibly limited to self rescue single person loads when hauling.