Winch on a winch!

**dullbird** · 13th July 2012, 03:43 PM

Ok so I have a hypothetical question which has derived from us winching Phil out the other day.....funnily enough after we winched him out all 3 of us wondered about this very question

We winched out on a single line pull we were going to do a double line as there was some reasonable mud and slippery slopes involved however we thought we would try single fist see how we went. Pulled the car out fine.

Then the question came " I wonder if you could?"

Both vehicles have winches both winches are exactly the same brand and size both 9000lb winches. We wondered could you attach the hooks of both winches and from each car to each other and both winch in at the same time effectively pulling the car forward? If you could would this be considered the same as a double line pull or simply sharing the load.

I'm not saying anyone should do this and I have not done it myself we just wondered could you?

**vnx205** · 13th July 2012, 04:04 PM

It would be the same load as a single line pull. The load on each winch would be the same as if there was just one pulling. The only difference would be that the speed of the pull would double.

**uninformed** · 13th July 2012, 04:10 PM

I would think as you would have one vehicle "locked" into postion and be pulling the other, the load would be doubled if the "moving" vehicle became stuck propper

Im thinking about pulling a dead weight, then pulling the same weight with it pulling your same force against you...

just get a hyd winch

**Drover** · 13th July 2012, 04:26 PM

Surely it would have to share the load ! Half each !

It would differ from a double line pull as the retraction rate of the cable would not be reduced, as it is in a double line pull.

Maybe one of the Maths wizards can inform us one way or the other ?

**THE BOOGER** · 13th July 2012, 04:30 PM

I think Drover has got it both winches will pull at the same speed with the load shared between them 50/50

**uninformed** · 13th July 2012, 05:09 PM

grab a piece of rope and pull a cart with 100kg on it towards you. Now jam cart so it cant move. Now jam cart so it cant move and apply the opposite, same force on the rope as you still try and pull.

The facts are that if you are on level firm ground it will be one outcome, put it reality and its another.....

**uninformed** · 13th July 2012, 05:13 PM

I dont think the load will be shared. The speed would be double. Think of the total cable out between vehicles, If only one winches it takes say 10 mins to winch in. Same conditions now engage the other winch, it is shortening the total winch cable by the same rate as the first, so the time is halved....but the load is still the same...for BOTH winches not halved

btw everytime I scroll my cursor I go over the bloody pop-up....Im going to punch John carter in a minute

**Mudsloth** · 13th July 2012, 05:16 PM

Got excited for a minute, thought it said wench on wench.....

I want to put another winch on the rear of vehicle, attach one to one side of a really deep gully the other winch the other side of the gully and winch across mid air. Now THAT would be cool.....

**Drover** · 13th July 2012, 05:25 PM

Originally Posted by uninformed

I dont think the load will be shared. The speed would be double. Think of the total cable out between vehicles, If only one winches it takes say 10 mins to winch in. Same conditions now engage the other winch, it is shortening the total winch cable by the same rate as the first, so the time is halved....but the load is still the same...for BOTH winches not halved

btw everytime I scroll my cursor I go over the bloody pop-up....Im going to punch John carter in a minute

Can't see it, if a winch retracts cable at a set speed or meters per second/minute whatever it will do that speed regardless. Okay it may slow a little depending on the weight it is pulling or battery power.

Using a second identical winch, cannot increase the speed that either winch can retract its cable.

The only practical difference is that twice the power...half the load on each.

Both winches in Dullbird example have the to deal with a set resistance, one winch has to deal with all, two winches share the load. The speed of the retraction is not impacted on.

**Mudsloth** · 13th July 2012, 05:28 PM

My opinion on the question though is that if you tried this the universe would swallow itself and we would all be forced to drive nivas.....either that or both cars would disappear into each others fairleads leaving you all stranded.

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