RopeGuide for Lowering Block?

[Dowden]

The pulley will be taking twice the load. E.g 100kg load = 200kg at pulley.

 

The anchor point will be taking twice the load of the pulley . 400kg

[Stephen Blair]

thanks Dowden, i shall look out my rigging book and do some swatting up. Thanks for that, really appreciatte it, always learning.

 

Now can you give me an example if it was a whoopy sling on the tree?

[High Scale]

Craigs correct, Kenny explains it here...TreeBuzz Board: Retreivable false crotch for rigging

[Dowden]

No worries Steve. I've been swotting up a bit myself lately.

 

If the pulley is attached to the tree with a dead eye or whoopie the anchor point would take only twice the suspended load.

[Ian Flatters]

Ok, Im trying to get my head round this so i've draw a picture. Am i right in my understanding?

 

Red = Rigging block supporting line tied off against stem, not tied/larks footed to lowering point.

 

Blue = Working rigging line.

 

And the other thing is my poor attempt at a tree:lol:

[High Scale]

That looks plain ugly, setting a pulley from the ground is something I would normally do for the purpose of lifting rather than dropping loads onto

[Rupe]

The pulley will be taking twice the load. E.g 100kg load = 200kg at pulley.

 

The anchor point will be taking twice the load of the pulley . 400kg

 

Ah, ok, I'm with you now. Sorry Craig! Doubling th eload at the pulley is not really a problem when you tie it off round a stem but havign a line over a branch stem means twice the load at that point PLUS the same load holding the pulley in place so thats 4 times the actual bit being lowered. Got it!

[MOG]

Hey, yeah i dont climb on it after haha not that dumb mate. i made a purpose one up for rigging like a heavy duty one with the Pinto Rig pulley. But yeah i never install one from the ground due to 4x4 factor. that is a heap of force say branch is 100kg = 400kg max. if you change angles and add friction over branches it changes the 100% of force/times load on the rope.

 

Also works very well for re-dircets for lowering branch so thay dont swing as far and u can fully lock it off on stem, if no crotch.

 

MOG

[Ross Smith]

i always use re directs in my lowering to share stress on gear and tree plus it helps with controlled swings.

If i had a spare cocoon/pinto would def use as a lowering device on ropeguide for smaller stuff but my ISC does the trick i just cant install it from the ground.

[MOG]

Yeah true rossy, very good idea about sharing the loading on the tree. does work and treat and safer is the main thing.

 

MOG