a basic how-to winch recovery vid series (1 Viewer)

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If anyone does not understand pulley systems, I would not recommend going out and trying what was shown in these short clips! You can very quickly double, triple, or more the load on winch lines, anchors, and everything in between if you're not careful.

Great videos, but nothing beats hands on instruction and practical knowledge.
 
A lot of basic, common knowledge stuff, but there's also some great tips, especially for noobies such as myself! Thanks for posting! :clap:
 
Same here, I'm completely new to winching and recovery and those videos were a great start. I'm ready to get out and do some practicing.
 
There is something I don't understand in that 4x4winches.com when they talk about synthetic rope:

Under extreme loads they can generate even massive side loads. I.e. up to 55 tonnes from a 4.5 tonne pull.

To avoid the "log-splitting" effect and the consequential jamming, friction and excessive side load problems, avaoid spooling the drum neatly and in a parallel fashion, as is recommended for wire ropes. The first layer should be put on under load (around 500kg) to capstan it on to the drum, all subsequent layers should be fed on tightly in a criss-cross manner so that each layer is at an angle of about 30 degrees to the layer below. This will prevent the upper layer from finding their way to the centre of the drum through the upper layers.

What are side loads?, how can a synthetic rope generate a 55 tonnes side load while a wire rope doesn't?
 
hmm...hadn't thought of that before. I looked around trying to find the explanation, but quickly realized that my Physics education is not yet far advanced as necessary. Hopefully a professional will chime in about the 55ton load from a 4.5ton pull.

As for this:
"To avoid the "log-splitting" effect and the consequential jamming, friction and excessive side load problems, avaoid spooling the drum neatly and in a parallel fashion, as is recommended for wire ropes. The first layer should be put on under load (around 500kg) to capstan it on to the drum, all subsequent layers should be fed on tightly in a criss-cross manner so that each layer is at an angle of about 30 degrees to the layer below. This will prevent the upper layer from finding their way to the centre of the drum through the upper layers."

I believe that this is just referring to top layers cutting into lower layers on the spool and becoming embedded under lower layes. Somewhat like how a fishing reel indexes back in forth to prevent the line cutting into the spool and tangling/snapping the line on the recast.
 
What they are talking about is when the cable (either steel or synthetic) piles up on one end of the drum while winching with the cable just spooling onto one side of the drum. What happens is if the first layers of cable are not tight on the drum (and sometimes even if they are), the cable will act like a wedge if it lands between the wraps on the drum. A wedge has some unbelieveable stress potential from a physics stand point.

Basically what happens is the cable has a few thousand pounds on it, and it wedges itself between existing layers/wraps. It does this because it may have 1000lb (for example) of tension, but when it starts to wedge it can exert 3-4 times that. I can't explain the physics, but if I can find the pages from my rigging books I'll scan them in and show you guys. Think of a wedge in a tree....you can insert a wedge into a 1000lb+ tree at the bottom with only a couple hundred pounds of effort with hammer and it'll raise that side of the tree, eventually knocking it over. When the cable is wrapped up as it should be, there is no way for it to get pulled into the lower layers as it crosses the layer below it rather than laying on top at the same orientation.

This is one reason to try to do straight pulls or redirect the cable if you can using a pulley block.
 
I liked the part with the pull-backwards rigging. Interestingly, that does reinforce the notion that it pays to have a very long cable rather than a short one plus an extension, though, contrary to some common opinions. (Not to mention a bunch of blocks... :))
 
Parts 6 to 15 are marked "private". Does anyone have them that they can upload somewhere else?
 

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