[AT] OT - Question about chain

[Stephen Offiler]

What Charlie said.  My comment meant that a tensioned chain (vs. a highly
stretched strap) doesn't store enough energy to pull an entire stump thru
midair all the way back to the pulling vehicle.

Of course a tensioned chain fly if broken.  Of course it can hit a human
with enough force to kill.  I get it.  The point I am trying to get across
is the fact that an equivalent size strap, if broken, stores many times the
amount of energy and is therefore that many times more likely to do lethal
damage.

SO



On Wed, Nov 27, 2013 at 1:44 PM, charlie hill <charliehill at embarqmail.com>wrote:

> You are right Al,  a chain will fly when it breaks. It won't throw a
> stump at your truck but the broken end of it, un-impeded by a load
> will do a lot of damage.  I've seen it but luckily haven't felt it.
> Cable is even worse!
>
> Charlie
>
> -----Original Message-----
> From: Al Jones
> Sent: Wednesday, November 27, 2013 11:21 AM
> To: Antique tractor email discussion group
> Subject: Re: [AT] OT - Question about chain
>
> You'd be surprised.  Like I said I haven't seen it myself, but there has
> been many-a chain hooked behind a big tractor to pull another tractor,
> truck, combine, etc. out of the mud that has snapped and rocketed through
> the back glass of the pulling tractor's cab.  I know of a guy that got
> banged up pretty badly because of that once.
>
> With that much power, all kinds of crazy stuff can happen when the chain,
> cable, strap, etc. comes tight. It comes down to how much risk you want to
> accept and how bad you want the object pulled out.
>
>
> Al
>
>
> -----Original Message-----
> >From: Stephen Offiler <soffiler at gmail.com>
> >Sent: Nov 27, 2013 10:50 AM
> >To: Antique tractor email discussion group <at at lists.antique-tractor.com>
> >Subject: Re: [AT] OT - Question about chain
> >
> >A chain won't do THAT.
> >
> >
> >SO
> >
> >
> >On Wed, Nov 27, 2013 at 9:44 AM, charlie hill
> ><charliehill at embarqmail.com>wrote:
> >
> >> David the ones that are intended to stretch, the so called snatch
> straps,
> >> deform and go back like a stiff bungee cord.  They do work when you
> >> need to pull something and don't have enough pulling force but it comes
> >> with some risk and danger.  I talked to a guy a while back that was
> using
> >> one
> >> to pull a stump.  He had it hooded to his 4 wd pickup and the other end
> >> to
> >> the
> >> stump.  He'd get a running start and go until the truck quit pulling,
> hit
> >> the brakes
> >> and wait, similar to what Al described.  The problem was he was hooked
> to
> >> a
> >> stump that was being held by roots.  After a few pulls, as he sat in the
> >> truck
> >> holding the brake the roots came loose and the stump flew through the
> >> air,
> >> into
> >> the pickup bed and came to rest when it crashed into the back of the cab
> >> with significant damage.
> >>
> >> Charlie
> >>
> >> -----Original Message-----
> >> From: David Bruce
> >> Sent: Tuesday, November 26, 2013 5:18 PM
> >> To: Antique tractor email discussion group
> >> Subject: Re: [AT] OT - Question about chain
> >>
> >> Once that strap has been stretched does it recover or does it deform to
> >> the extent to be a one use option?  In some cases a one use version
> >> would be fine but for general use that might turn into a problem?
> >> Not trying to be a smart ass rather trying to learn something.
> >>
> >> David
> >> NW NC
> >>
> >> On 11/26/2013 3:41 PM, Len Rugen wrote:
> >> > When you put tension on a tree with a chain, as soon as it moves a
> >> little,
> >> > the chain goes slack.  I have some 2" wide nylon webbing, my tractor
> >> > will
> >> > probably stretch a 50 ft. piece 10 ft or more.  When the tree is cut,
> >> > it
> >> > gets a good 10' tug from the stretch.
> >> >
> >> > If you're pulling a tree/log and it catches a stump, you will break a
> >> > chain before you can react, nylon will give you enough time to clutch.
> >> >
> >> > DO NOT mix nylon and chain, don't use metal hooks on nylon.  I know
> >> > some
> >> > come that way, but take some precaution so if something breaks, the
> >> > metal
> >> > hook doesn't become a nylon powered projectile.
> >> >
> >> >
> >> >
> >> > Len Rugen
> >> >
> >> > rugenl at yahoo.com - May also be used when responding as
> >> > rugenl at prairiehome.k12.mo.us
> >>
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