Double line pull with hand winch half as hard for operator?

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Double line pull with hand winch half as hard for operator?

Post by Wes » 28 Oct 2016, 3:52 pm

Just making sure I understand this...

I haven't used one, but I understand it's tough work using a hand winch.

I assume using a pulley to do a double line pull will half the resistance in operating it for the user, making it easier? (I know it will be half the speed too)

Don't want to get into a debate over hand vs electric winch, just want to know if this is correct :thumbsup:
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Re: Double line pull with hand winch half as hard for operat

Post by Chronos » 28 Oct 2016, 4:10 pm

Yes if you use a snatch block Pulley) it will require less force (near enough to half) to pull the load but it will take twice as long as you say

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Re: Double line pull with hand winch half as hard for operat

Post by Oldbloke » 28 Oct 2016, 4:10 pm

Correct. Half speed but half the effort.
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Re: Double line pull with hand winch half as hard for operat

Post by Noisydad » 28 Oct 2016, 5:12 pm

...and twice the cable and D Shackles. Add a second snatch block for even more pulling power but that comes at the price of three times the cable and other gear. you dont get any multiplication of power for free.
There's still a few of Wile. E Coyote's ideas that I haven't tried yet.
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Re: Double line pull with hand winch half as hard for operat

Post by Wes » 18 Nov 2016, 3:48 pm

Cool cheers guys
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Re: Double line pull with hand winch half as hard for operat

Post by <<Genesis93>> » 18 Nov 2016, 6:24 pm

The tension, or force needed for the 'pull' is evenly divided between the number of lines. So if the is a single pulley at the other end, and 2 (duplicate) lines, then each line will tension to EXACTLY half the total force, however the pull distance that YOU exert will be twice the distance the 'object' is moved.

If there is a double pulley at one end, single at the other for a total of 4 lines, then the winch force required to move the object would be one quarter the total force necessary to move the object, however the winch distance is 4x as much as a straight pull...

Double pulleys at both end; winch force is one fifth of the total 'pull'

There is no free lunch...the work required is always the same;
1 pull over 1 distance
half pull over twice distance.... etc

:thumbsup:
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Re: Double line pull with hand winch half as hard for operat

Post by Norton » 23 Nov 2016, 9:46 am

Take a second hand winch and a mate.

Same speed, half the work :mrgreen:
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Re: Double line pull with hand winch half as hard for operat

Post by Noisydad » 23 Nov 2016, 12:10 pm

...or take a mate and tie a beer to the far end of the winch cable . You'll halve the time and have no effort! :D
There's still a few of Wile. E Coyote's ideas that I haven't tried yet.
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Re: Double line pull with hand winch half as hard for operat

Post by Bourt » 08 Dec 2016, 2:59 pm

Could have saved up for the money to buy a real winch in the time you blokes are taking to come up with all these half assed alternatives :lol:
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