4 to 1 pulley system for felling

[mitchel]

Just wondered if anyone had any diagrams or videos looking to use a 4 to 1 system where you have a prussik that tends the slack as you pull it tensions up

[James905]

Its a technique that's used a lot in mountaineering instruction when guiding a client. Your taught to build a system with a "clutch" to haul your client if they are stuck and can't climb a section them selves.
Ive used it felling and it definitely helps!

Where you go through the first pulley (make sure its not a massive pulley or your prussik will just pull through.) Put your prussik on then if its long enough just attach it to the pulley krab, or use mini sling to extend..... that's the easiest way to do it.

DONT use a croll or device like that as the force you can create is huge and can cause it to lock in biting your rope hard and causing damage...... may have learnt the hard way!

Edited January 27, 2019 by James905

[scotspine1]

 

 

[carlos]

here is what i use.

the self tending part is a vt knot with the tails poked through the little hole on the pulley and a stopper knot on the end, i put it on the leg nearest the tail that you pull so there is less pressure on it if that makes sense, , i usually dont bother with the progress capture but today i was felling near a road and wanted to pretension the felling rope to free up some for the road,

i find this block and tackle a handy tool, its a lot lighter and easier to set up than a tirfor.

the cam to attatch it to the pull rope is handy but a strong prussic could be used or just tie in to the pull line with an alpine butterfly.

hope this helps.