Too bad that's waaaay too much effort for a guy like me that's only mildly interested in one of these.seventyfive said:
new shackle
- Thread starter seventyfive
- Start date
?fishEH said:Too bad that's waaaay too much effort for a guy like me that's only mildly interested in one of these.
Mongo said:
So is it bad to only single line pull? I usually use single line and don't double back to my bumper unless the object I am pulling out is extremely close.
If it stalls then I'd use the pulley, but it rarely stalls.
Yes, chances are it will kill you and many others much like the shackle seventyfive has.nosivad_bor said:
nosivad_bor said:
This isn't the way you should think about it. Doubling your line (back to your stuck truck) makes the winch work less, but will increase the load on your strap, shackle and snatch block. With that synthetic "recovery point" there seem to be many variables of its ratings. I want to know the rating of my gear and potentially the weakest link.
It's always a good idea to get as much line off the winch drum as possible. Your Husky is only rated at 10K on the first wrap on the drum. After that each layer on the drum reduces the pulling power by 10-15%.
A straight line pull is a good option in many cases if the pull isn't that severe and you can keep the pull straight. Once you start adding in resistance (slope, mud, etc) then you want to start thinking about using a snatch block.
Another reason to use a double (or more) line pull is that it slows things down which can be a good thing many times.
Those Dyneema Shackle loops have been used in the sailing industry for some time. Developed for VOR-70 racing and extreme load applications (think backstays holding up masts) and have made their way into just about everything.
There is also a bit of discussion in the rigging community as to how to make these things. The one pictured is a "finger-trap" style and there is a "basket" style with an additional brummel. The one with the additional brummel secures tighter around the knot (and that knot is NOT a monkeyfist) while the fingertrap style doesn't tighten. The fail point is always the same, the knot pops off, very strong if made with proper Dyneema or Spectra and easy to make.
A good sailing rigging shop can make these for you. Setting the knot and pre-loading them is an important part of making these for high load applications.
Here is one company that makes them-
http://www.kohlhoff-online.de/en/Loop_Products/Loop_Shackles/
There is also a bit of discussion in the rigging community as to how to make these things. The one pictured is a "finger-trap" style and there is a "basket" style with an additional brummel. The one with the additional brummel secures tighter around the knot (and that knot is NOT a monkeyfist) while the fingertrap style doesn't tighten. The fail point is always the same, the knot pops off, very strong if made with proper Dyneema or Spectra and easy to make.
A good sailing rigging shop can make these for you. Setting the knot and pre-loading them is an important part of making these for high load applications.
Here is one company that makes them-
http://www.kohlhoff-online.de/en/Loop_Products/Loop_Shackles/
I went back and read what I posted before and I'm pretty sure it's capacity will only be reduced by the weakest link, not the cumulative effect I described. But it will still be significantly less than the rating of the rope it's made from.
antichrist said:
After the holiday I will post up scientific facts and remove the theory from this.
Ben,Justin and Steven Hawking discussed the shakle's perfofmance in detail and will report their findings in detail in a later thread.
FIVESPDDISCO said:
scientific facts are used for design, testing is what makes a product. i prefer the latter approach. tell you what, next week i'll use your flimsy, failure prone, weak shackles with a chain (about the least kinetic recovery device out there) and yank on that little truck in the background and see what fails first.....i'm thinking my frame horns, but in theory it should be your shackles.
Devildog01 said:
Funny thing about the internet, you never really know the guy on the other end.
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