Hi Rick.
I drive an $800,000 fire dept. ladder tower for a living and carry one
of these amongst a whole hose of extrication equipment:
http://specialserviceandsupply.com/Prod-C3.html
It's very much a precision piece of work and rated at 3 tons. "With a
two part line the C-3C Heavy Duty Rescue Come-A-Long’s 5/16” diameter
aircraft cable provides a full 7 ½ feet of lift on a 3 ton load with a
handle pull of 105 lbs..."
Hand operated units with much more load capacity than this are usually
in the chain hoist category.
73,
Jon Pearl - W4ABC
www.w4abc.com
On 9/23/2011 7:48 PM, Rick Karlquist wrote:
> A question for you come along experts.
>
> I saw some come alongs at the Chinese tool store (you know the one)
> that claimed to pull some huge weight like 8 tons. Assuming
> the user applies 40 lbs, this is a 400:1 mechanical advantage,
> not counting friction. This is hard to believe. Is this
> true of these or even the American equivalents? Or is this
> specsmanship where it moves an 8 ton boat onto a trailer
> or something like that?
>
> Rick N6RK
>
>
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