rufusbooth
1/2 ton status
Huh, Huh...he ...said ...SNATCH!Rufus, admit it. You just like using the word snatch a lot, huh?
CK5
Register an account today to become a member! Once signed in, you'll be able to participate on this site by adding your own topics and posts, as well as connect with other members.
Maiden voyage with carnage
- Thread starter gone huntin
- Start date
Wrench
1/2 ton status
Rufus' above diagram shows 1:1, 2:1, and 3:1 simple mechanical advantage setups. On all three setups, the cable itself is only holding the amount of force generated by the winch, likely 8,000 pounds. It is the anchors and snatch blocks that are holding the higher forces, in the 3:1 situation one anchor on the load is holding 8000 and the anchor with the pulley is holding 16,000 pounds. I do search and rescue in both high angle and swift water situations and we use mechanical advantage setups all the time. As long as the cable is rated for 8000 pounds all of those systems will work great.
rufusbooth
1/2 ton status
Edit: Thanks Wrench, you beat me to it.
One thing to keep in mind is that when doing a double line pull, it is the block that is taking the load.
so using the 8,000 lb Warren winch on a single line pull the max pull will be 8,000 pounds. if you run a double line (0 degree pull) on a single block you divide the load on the cable but the full pull weight will be seen at the block. so in this case on a 0 degree pull your (2 to 1 advantage) 8,000 pound winch can now generate a total of 16,000 pounds. Each half of the cable will still only see 8,000 Lbs. now here is the key, and why I mentioned that your blocks need to handle it, the block will see the FULL 16,000 Lbs of pull. your choke chain/tree saver snatch block and associated hardware MUST be able to handle the load. Remember, this is in a moving block configuration.
I agree with 38377k5, you are most likely going to need to move to the front as your rear attach point is no longer viable. Also, as he mentioned getting the truck further out of the mud first will help tremendously.
Think of it this way. The charts for calculating pull stuck to the rim is a 1x multiplier. Stuck to the wheel (think wheel hub) is a 2x multiplier. stuck to the body/frame is a 3x multiplier. Every inch you clear out of that mud makes a BIG difference.
Rufus
One thing to keep in mind is that when doing a double line pull, it is the block that is taking the load.
so using the 8,000 lb Warren winch on a single line pull the max pull will be 8,000 pounds. if you run a double line (0 degree pull) on a single block you divide the load on the cable but the full pull weight will be seen at the block. so in this case on a 0 degree pull your (2 to 1 advantage) 8,000 pound winch can now generate a total of 16,000 pounds. Each half of the cable will still only see 8,000 Lbs. now here is the key, and why I mentioned that your blocks need to handle it, the block will see the FULL 16,000 Lbs of pull. your choke chain/tree saver snatch block and associated hardware MUST be able to handle the load. Remember, this is in a moving block configuration.
I agree with 38377k5, you are most likely going to need to move to the front as your rear attach point is no longer viable. Also, as he mentioned getting the truck further out of the mud first will help tremendously.
Think of it this way. The charts for calculating pull stuck to the rim is a 1x multiplier. Stuck to the wheel (think wheel hub) is a 2x multiplier. stuck to the body/frame is a 3x multiplier. Every inch you clear out of that mud makes a BIG difference.
Rufus
reddog64
1/2 ton status
And your winch cable.....
Can your cable do 18,000 lbs?
Can your cable do 18,000 lbs?
vortec
1/2 ton status
that sucks about the frame, man. i hope it didn't do too much damage.
i took my k5 wheeling 4 hours after i bought it. my friend dropped by with his jeep and off we went.
i took my k5 wheeling 4 hours after i bought it. my friend dropped by with his jeep and off we went.
rufusbooth
1/2 ton status
That is the beauty of mechanical advantage systems. the load is divided amongst the various pieces of the cable. No portion of his cable would see more than 8,000 lbs. even though the max pull force would be doubled to 16,000 lbs.
Rufus
Nope, tried the hi lift, front still had it too bad. There is now water in the floors so I've managed to sink it even more. I did manage to break the drop hitch on my dd Suburban snatching on it today. I'm now waiting on a dual wheel John Deere to show up to give it a try.
Slapperbar
Retired Navy NDT Examiner
Damn crappy.
It's out!!!! The dual wheel 4x4 John Deere 8400 pulled it out in 5th gear and in 2 wheel drive at 950 rpm's. It didn't even spin or strain. 
I'll post more pictures when the neighbor sends them to me. The water line on the driver side doors is at 36".
I'll post more pictures when the neighbor sends them to me. The water line on the driver side doors is at 36".
Why don't more people have a tractor as a trail rig?
blazin' j
1/2 ton status
glad to hear...
rufusbooth
1/2 ton status
good news it is out!
John Deer Trail rig...
John Deer Trail rig...
Some pics. from this morning.
blazin' j
1/2 ton status
damn...that hitch sure looks thin...glad it took a deer to get u out...means it was really stuck...
Thats why we build our own hitches out here for mud and run 5 ton pintle hooks. thick wall steel tubing and braced and welded into the frame the pintle makes it nice to hok and unhook in a hurry with no tools.Front and back they can be bolted to special reciever aswell so they ar raised up out of the mud like a drop hitch up side down. but i prefer them on a straight shot or bolted to a new cross member installed welded and braced.Once you use one you will never go back especially if you are playing in the mud and geting stuck alot.
