From: MV (MV@dc9.tzo.com)
Date: Wed Aug 10 2005 - 08:32:22 PDT
If they started hanging that type of rope on overhead cranes, then I
would start to considering it for general winch use. I wonder how
abrasion resistant it is?
The fact that it doesn't store energy can be a bad situation. Sure no
one wants to have a wire rope break and recoil like a spring - but on
the otherhand if you get into a shock loading situation, you really want
the rope to absorb the energy since it will spring and deform before it
will break. Hopefully the spring action will absorb the shock load and
the rope not break. If the synthetic stuff has no spring action, then a
slight shock load could send it over the top of it's tensile strength
very easily and the rope break.
I can pickup up 5/8" and heavier wire rope in just about any larger city
and not pay any shipping cost.
I remember unloading a tractor off my trailer. I had a winch line
attached to the front of the tractor to "control" the rolloff from the
trailer. The tractor started rolling before the winch line got
tight. The cable went tight suddenly as the tractor rolled easier than
I had expected. The shock load didn't break the cable but the pressed
on ferrule let go. In that case it would have been nice if the wire
rope had stretched a little bit more to dampen the shock load. As it
was the tractor rolled across my yard, narrowly missing my neighbors
fence and stopping about 10 feet from their SUV. That could have been bad!
Dave
Ryan Gill wrote:
> At 10:47 PM +0000 8/9/05, david gudmunsen wrote:
>
>>Sure Randy and others,
>>
>>http://www.samsonrope.com/home/recmarine/catalogs/index.cfm
>>
>>Get the catalogue PDFs for industrial and also check Amsteel Blue catalogue.
>>Get back to me if you need further info. The stuff is readily available and
>>relatively cheap.
>
>
> Relatively cheap nothing. When you add up the lighter weight, low cost of shipping, durability and then just the lower cost, it's amazing the military isn't using it already. They use similar stuff for holding up live loads on repelling line. This stuff appears to be even more solid than repelling line or dynamic rope because it has an inherent UV resistance. I have to wonder about chemical resistance. Seems like a canvas water proof cover would be a good thing to add to the 'field kit' for winch equipped trucks.
>
> The absolute biggest thing is that it doesn't store energy like wire rope does.
>
This archive was generated by hypermail 2.1.4 : Fri Oct 28 2005 - 23:25:27 PDT