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Thread: Winching boulders with a sea anchor and water current?

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  1. #1

    Jan 2019
    12
    5 times
    All Types Of Treasure Hunting

    Winching boulders with a sea anchor and water current?

    Anybody ever heard of using a sea anchor as a winch? Sling up ur Boulder, attach via mooring hitch or trigger hitch/Slipknot, deploy, and viola! Could be retrieved easily by attaching a weight on one side of the canopy and a float to the other possibly. Using anchor bolts and pulleys/blocks u could redirect your pull direction. Shock loading may be a problem in some situations, and canopy might snag in shallow waters but seems worth a shot right? At almost 800x the drag coefficient of air u gotta figgure if anything you're gonna be fighting to keep hardware from vaporizing under loading conditions. Would rather try rope instead of cable but abrasion resistance and WLL are critical in this application imho. Would love to hear Any thoughts you guys have about this. Let's say for the scope of our conversation the sea anchor in question is a 22' half dome reserve parachute.

  2. #2
    us
    Nov 2010
    High Rockies
    GB2
    85
    65 times
    All Types Of Treasure Hunting
    We've thought about this a bit. The idea is plausible. Just have see if a roughly 5 foot water sail can move lets say a 1 ton boulder in a medium slow current. If so then this might work. Detaching the sling from the boulder needs to be quick and easy too.
    A 22' sail is way too big for most rivers.
    wildminer likes this.

  3. #3

    Jun 2017
    110
    141 times
    All Types Of Treasure Hunting
    lots of jet boat drivers have used tarps and various other items to make a "sea anchor" to pull the boat off gravel bars etc when they blow a corner and get them stuck. Sized right I am sure that you can move a boulder with one but controlling it would be a challenge cause once its deployed things tend to happen fast. you need a way to pop one side loose so it will just flag out in the current instead of scooping the water.
    Molewacker likes this.

  4. #4
    us
    captain

    Dec 2016
    ohio
    bounty hunter time ranger
    206
    176 times
    All Types Of Treasure Hunting
    They make rock slings with wire rope.
    Clay Diggins likes this.

  5. #5
    us
    Aug 2004
    Olympia WA
    Minelab Xterra 70, Minelab SD 2200d, 2.5", 3", 4"and several Keene 5" production dredges, Knelson Centrifuge, Gold screw automatic panner
    821
    1793 times
    Prospecting
    I have messed around with using a surplus parachute and lots of rope. It works but you really have to have your **** together because things get out of hand really quick and you dont just turn it off.
    IMHO packing in an electric winch and battery is far easier than the hassle of all the ropes and rigging...safer too
    N-Lionberger likes this.

 

 

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