More winching ops questions

[IHASFIP]

I do give ya'll mad props for going the extra mile to make models to demonstrate how it works. I think I understand now. I still believe if I was that stuck to need to do that I would just find something to pull me out. That seems like alot of work. But thanks for the explanations none the less.

D

 

[pevrs114]

I've seen quite a few rigging examples that use double snatch blocks. But I've never been able to find one for sale... I have however seen two single snatch blocks rigged to the same anchor point. Is this how it's done, or am I missing the 'double snatch block' section of the catalog?

I've checked recreational recovery equipment such as Warn/Ramsey/Superwinch/Milemarker/Champion and also commercial sites like Crosby and AWDirect, and still only find single snatch blocks.

I'd love to pick up a double one.




I strongly recommend the following books if you'll be doing much of this:

FM 21-305 Manual for Wheeled Vehicle Driver
FM 20-22 Vehicle Recovery Operations
Off-Road Recovery Techniques by Nick Cole
4 Wheel Freedom by Brad DeLong

 

[mangus580]

I do give ya'll mad props for going the extra mile to make models to demonstrate how it works. I think I understand now. I still believe if I was that stuck to need to do that I would just find something to pull me out. That seems like alot of work. But thanks for the explanations none the less.

D

I am guessing you have never had your self in the position that requires such a setup

it really sux when you have the biggest truck around!

 

[rmgill]

I've seen quite a few rigging examples that use double snatch blocks. But I've never been able to find one for sale... I have however seen two single snatch blocks rigged to the same anchor point. Is this how it's done, or am I missing the 'double snatch block' section of the catalog?

I've checked recreational recovery equipment such as Warn/Ramsey/Superwinch/Milemarker/Champion and also commercial sites like Crosby and AWDirect, and still only find single snatch blocks.

I'd love to pick up a double one.

Try Army Tents.com. I think they've got a bunch of the double snatch blocks.

Becareful with a double snatch block. You're double loading that anchor point by running multiple parts of cable through that same pulley.

 

[Jake0147]

Made a model too, kinda crude, but it shows that it works.

That simple model can explain it better than I ever could.

and yes, there is a lot of friction judging from how the model moved. I had to relieve tension in the individual legs to make the "truck" move over and over....probably best to have the truck in gear when using this method to help things along.

I don't know if I would do that. If I did use the trucks power, I'd be darned careful not to overrun the winching speed. It will lay the several parts behind the truck on the ground to be driven over. When I did this with the wrecker at work, driving was not needed for the pull, and was prohibited by the need to constantly watch and re-arrange the blocks around the extension cable hooks. And of course with the winch controls being outside of the truck, I would have had to trust one job or the other to the same (esteemed colleague) that drove the truck in there in the first place.

I believe you are familiar with capstan winches, no?
If you add up all of those "half of a wraps" around each screw... I bet it did bind up.
I don't have a little model made up to verify this, but given the diameter of that string, and the diameter of those screws, I would venture to guess that if you had used three eighths larger lag bolts instead of those screws (clean shiny ones, not old rusty ones) that the demo model would probably work on it's own at least well enough for no-load demonstration purposes.

 

[cranetruck]

Well Jake, it's not easy to see in the above image, but there are actually brass sheaves on the nails.

I see you point regarding the use of the transmission to help the process along. All in all, the whole rig is rather impractical IMHO....probably why it isn't included in the FM 20-22.

 

[Kaptin kalen]

Hi, Warn sells a 16,000 pound 24 volt winch. I was thinking about buying it and having it installed? Any Ideas?

 

[rockman]

KK, the electric winch may not stand up to much use. I have a PTO one on my truck and it works well and runs cool. I drove a brush truck for a VFD (one ton dodge) with a big eletric winch and it overheated pretty quick.

my 0.02$

 

[Jake0147]

All in all, the whole rig is rather impractical IMHO....probably why it isn't included in the FM 20-22.

Definately better to know it than to have to use it... Very cumbersome at best.