Winch Rigging and Anchor loads

[Magnum_Willys]

The science stuff ....
All I know is every time you loop through a block you reduce what your winch pulls by almost half.

You see a crane with a block and the cable loop though a few pully on a single block.
Same principle winch on crane is only gonna lift so much.
So you increase lift,pull,whatever that way.

Cryder Science ?     

[Rob]

Working my way thru this article.  pretty good so far.

https://www.steelsoldiers.com/upload/misc/FM20-22.pdf

[hunter399]

The science stuff ....
All I know is every time you loop through a block you reduce what your winch pulls by almost half.

You see a crane with a block and the cable loop though a few pully on a single block.
Same principle winch on crane is only gonna lift so much.
So you increase lift,pull,whatever that way.

Cryder Science ?     

Only other science I know .....
Is Cryder Science...
Load your truck with firewood and that cable will break a lot faster.

[KFhunter]

Don't let em give ya guff hunter399, you prolly got more experience dragging things with cable than they'll ever have 

[hunter399]

Don't let em give ya guff hunter399, you prolly got more experience dragging things with cable than they'll ever have 

No worries.
I'll be honest haven't broke a cable in awhile,but I have done it. It takes a lot of force to break a 10,000lb test winch cable.
My truck will barely do it empty,a lot of jerking ,and a lot of shock loading to do it.
I can't tow any trailers,the ball on my hitch is bent down ,for some reason.

[KFhunter]

Don't let em give ya guff hunter399, you prolly got more experience dragging things with cable than they'll ever have 

No worries.
I'll be honest haven't broke a cable in awhile,but I have done it. It takes a lot of force to break a 10,000lb test winch cable.
My truck will barely do it empty,a lot of jerking ,and a lot of shock loading to do it.
I can't tow any trailers,the ball on my hitch is bent down ,for some reason.

My back license plate is caved in for some reason....

[hunter399]

Don't let em give ya guff hunter399, you prolly got more experience dragging things with cable than they'll ever have 

No worries.
I'll be honest haven't broke a cable in awhile,but I have done it. It takes a lot of force to break a 10,000lb test winch cable.
My truck will barely do it empty,a lot of jerking ,and a lot of shock loading to do it.
I can't tow any trailers,the ball on my hitch is bent down ,for some reason.

My back license plate is caved in for some reason....

[hunter399]

Not to thread jack here.

It seems to me that when a cable breaks it whiplashes some. But when you break a chain ,that sucker always and I mean always comes back and hits the truck.

Anybody have similar experience.....

[Ridgeratt]

Not to thread jack here.

It seems to me that when a cable breaks it whiplashes some. But when you break a chain ,that sucker always and I mean always comes back and hits the truck.

Anybody have similar experience.....

Hunting buddy has a pretty impressive divot in the tailgate of his truck from a shackle.

[MountainWalk]

Don’t forget to think outside of the box! One time up in the Quilcene mountains, I’d gotten a little squirrely in my YJ and went off the road on the downhill side, with both driver’s side tires well off the road. Before I had a winch. Before I had lockers. Well, I’m a long ways from help.
 I takes inventory of what I always have in my rig. I had regular shackles, a skookum haywire block, my spare 661 saw and a half section of haywire that I’d spliced eyes to. I formulated a plan.

I fastened the hindu end of the strawline to the passenger side front shackle, crossed the road and climbed a good sized hemlock, up high enough to help me out, around the tree, and back to the Jeep, creating two lines. Next I cut a good stout green limb and cut a twister stick, put it between the lines and twisted until I got some tension on the lines and put the long end of the stick against the road bed to hold my stick and tension.

  I fire up my saw, grab a wedge and put an uphill quartering face cut in that hemlock. I remember watching the kerf wanting to start sit back on my saw and if that happens, I really stuck then! But I pop a wedge in, give er a few taps and down goes the tree, and up onto the road goes my Jeep.

Use your head!

[MountainWalk]

I don’t know if it applies to recovery, but out in the woods, you always rig a shackle with the pin to the yarder, or the pin towards people and stuff, and the shackle itself on the other side.  So if anything happens, only the pin flies, not the shackle itself

[Rob]

OK, I think I have the principle I was looking for in scenario three above from that link I sent:

Situation 3: 
Load:  8,000 lbs
# of snatch blocks:  2
Total load 8,000+1600 = 9600
Load per line:  9,600/3=3,200

Load on Winch:  3,200 lbs
Load on Anchor 1:  6,400 lbs
Load on Anchor 3:  6,400 lbs
Load on Anchor 1:  3,200 lbs

[Rob]

I don’t know if it applies to recovery, but out in the woods, you always rig a shackle with the pin to the yarder, or the pin towards people and stuff, and the shackle itself on the other side.  So if anything happens, only the pin flies, not the shackle itself

Brilliant.  and I like using the tree felling to extract your vehicle. 

[Ridgeratt]

Don't forget to paint them with a color that stands out. Nothing worse than chasing a pin in the snow or a dirt road.

[Skillet]

OK, I think I have the principle I was looking for in scenario three above from that link I sent:

Situation 3: 
Load:  8,000 lbs
# of snatch blocks:  2
Total load 8,000+1600 = 9600
Load per line:  9,600/3=3,200

Load on Winch:  3,200 lbs
Load on Anchor 1:  6,400 lbs
Load on Anchor 3:  6,400 lbs
Load on Anchor 1:  3,200 lbs

What's the additional 1600# from?