Cable pulley hauling line
Mark has wanted a zipline
to run from our parking area to our core homestead for years, both as a
way of moving people and of moving stuff. Over and over, I explained
the reasons I didn't think it would work:
- The cable would have to run across our neighbor's field to go in a
straight line, and I don't think said neighbor would be thrilled at the
- We'd actually have to run two ziplines to be able to go in both
directions, and that would also require hauling supplies up onto the
hill above our cars before attaching said supplies to the zipline.
- We'd have to cut down a lot of trees to give the zipline a straight shot.
- The total distance (about 900 feet in a straight line) is pretty daunting.
However, I've been
wondering lately if a different cable-related scheme might be the way to
expedite hauling while the floodplain is sodden and our eventual driveway upgrade
is slow in coming. Glad of any line-based solution, Mark was quick to
remind me that we really only need to span the worst of the swamp, which
would be a smaller distance and would require cutting fewer trees out
of the way.
With our new access point by the goat shed,
we could potentially run a 350-foot cable from a hill above the
driveway near the ford (point A) to the goat-shed area (point B),
hauling supplies in the ATV to point A (since an old logging road runs
up onto that knoll) and then in a cart from point B to our garden along
another old logging road. This would cut off the entirety of the
terrible-driveway areas and allow me to haul in the manure I so badly
need...in a few short weeks. (Yes, we're hitting crunch time around
A zipline might be dicey
for hauling supplies, but what about a circular line designed like a
hefty pulley clothesline? One person would stand at point A loading
buckets onto the line, then someone else would pull the line at point B
and unload the buckets.
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I'm thinking of using
galvanized "aircraft" cable just like people use for ziplines, either
7x7 or 7x19 strands. Does anyone know how to figure out the weight limit
on a system like this (so I can decide which diameter cable to spring
for --- 3/8", 5/16", or 1/4")? And how would you suspend the load ---
make a little carriage for the buckets to ride in that is suspended from
the cable by some kind of hook? Or make the cable support a single line
like a zipline (instead of my pulley system) with a carriage that rolls
along it pulled by a rope on both sides? Either way, do you think this
system is even feasible over a 350-foot span? Please tell me why my idea
is every bit as crazy as Mark's was (or how you would design the system
to make it work)!