isc pulley confussion

[jamesw]

http://www.iscwales.com/whatshot/2008/may/index.htm

 

i have just seen this on the site has anyone got any clearer photos of this set up? call me stupid but i don't get how a blakes fits into that photo do you ?

[Mark T]

I would imagine the blake's hitch ties onto the line just above the pully and relies on the stopper knot to keep it attached.

 

I have seen guys tie a single fishermans onto the pully body at that point before but never fancied it myself, fancy it even less with a stopper!

[jamesw]

ah i thought that was the intention seems a bit risky:scared1:

 

i suppose with a different hitch to hold in place.

 

anyone got a similar setup they could recommend?

[Amelanchier]

Well look they quote the forum - I never noticed that. Cool.

[Tommy_B]

You can clip a micro pulley directly underneath a prussik or blakes and just hold it in place with a tiny prussik loop and micro krab on the static end of the rope. It does tend to "bind up" a bit more and burns normal prussik a bit faster than normal. It took me a bit of getting used to. Handy to know though.

[Rupe]

It was quite common to tie one leg of a VT directly to the bridge of a petzl fixey pulley, the other leg being tied to the karabiner between the cheeks of the pulley. Only problem with that was the the petzl pulley didn't have a rated bridge althouth it was plenty strong enough, I think Chris Cowell tested some.

 

So ISC have just brought out a similar pulley and rated the bridge. They suggest tieing a blakes hitch but its for any hitch really. Stopper knot or fishermans will be fine.

[Xerxses]

Jon Hartill was using/used this last time at the workshop. Slick!