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  1. #201
    Senior Member FreeTheWeasel's Avatar
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    Amsteel stress photo

    Greetings

    I'd like to thank everyone for this fantastic thread. I was one of the few remaining holdouts using the zig zag cleats, even after getting dropped once when my first set wore out.

    I made my first set of whoopie slings using a section scavanged from a wire coat hanger. I inserted the long rod into the core and used it like a pull-fid by taping the free cord to the end of the rod. It was cheap and it worked really well.

    I tested the suspension by replacing the stock rope on my Hennessy hammock and setting it up on a backyard, portable metal hammock stand. The stand has quite a bit of flex in it and I typically pull the suspension fairly tight to compensate for the inevitable droop. This is not typically how I hang when using rigid trees.

    After a few attempts at tightening, adjusting, and then loosening the suspension, I noticed that the junctions where the free end enters and leaves the bury were (for lack of a better term) unweaving themselves. You can see a photo here

    The fibers don't appear compromised, just unwoven. Does this look as though it could be a potential failure?

    Thanks for your opinion.

    FreeTheWeasel

  2. #202
    GrizzlyAdams's Avatar
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    hi there FtW, been a while since I've seen you poke your head up here. Hope the Oregon thing is working out for you and yours.

    I'm wondering if in your application of the whoopie sling, the constrictor and the bury are pulled a lot apart, e.g. if where you attach on your stand has a significant diameter and you have to cinch up tight. My guess is that most of us doing the whoopie thing have those lines quite parallel where the bury emerges from the constrictor. This seems also to be true in the pictures I've seen of the sling used in arborist applications.

    My intuition, for what's that worth 'cause I sure don't have a large body of experience here, is that you don't need to worry about failure. The rope isn't making a tight turn, you've got all the rest of the bury and constrictor working for you, and I don't see that you'll get much more unraveling if the cinching up you do isn't getting any tighter...the stand isn't shrinking.

    but then maybe someone who knows what they are talking about will chime in...

    Grizz

  3. #203
    Senior Member ikemouser's Avatar
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    Quote Originally Posted by stormcrow View Post
    I think I am understanding the process as it presently stands in its evolution. I still want to see a vid of someone hooking it up and adjusting it. Once I get mine all done I will do it but I know there is someone out there that is all ready to film a little clip for us..

    Stormcrow
    I 2nd that, vids > pics

  4. #204
    Frawg's Avatar
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    Quote Originally Posted by FreeTheWeasel View Post
    ... The fibers don't appear compromised, just unwoven. Does this look as though it could be a potential failure? ...
    I see what you've described in my suspension, too, both on trees and on the backyard hammock stand (same issue you described).

    IMHO, the integrity of the strands is not compromised at all. I do see the possibility of the strands being unequally loaded - some carrying more of the weight than others. I just derate the system by 50%, e.g. if 7/64 AmSteel Blue breaks at 1200# (can't rememberthe exact number, offhand) then I treat the system as if it had a breaking strength of 600#

    Perhaps Custom Splice or another pro can shed more light on this for us.

    $.02
    - Frawg

    {generic tagline}

  5. #205
    Senior Member nacra533's Avatar
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    Inside out.

    My assumption: It is 8 strand instead of 12 strand, otherwise, the bury is not centered in the the strands.

    It looks like the eye turned itself inside out once or twice.

    It is possible while burying the line, when making the splice, you twisted the line inside the bury, which finally worked itself to the eye where it could twist no more and opened up the strands.

    Try untwisting the eye and see if the strands line up/re-weave themselves better. You'll probably have to work the eye and the buried tail together.

    Looking at the picture it looks like you need to twist in this manner. which is much harder to explain than to do.

    Right hand. Pinch the end of the eye (where it hooks to the stand or whatever), forefinger on top of eye and thumb below. Twist that cross section clockwise. (move forefinger towards palm and thumb away from palm). With your other hand, twist the tail the same direction/amount.

    Another option would be to rebury it, making sure to avoid twist.

  6. #206
    New Member Custom Splice's Avatar
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    You guys are on the right track.
    The un weaving is not hurting the integrity of the rope.
    I might derate by 20% but in these applications your more than within your limits.

  7. #207
    Senior Member nacra533's Avatar
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    Quote Originally Posted by fin View Post
    Need to find a suitable whipping twine now.
    Dental floss works great in a pinch. If regular floss is too thin, the dental tape works too.

    Marlow #2 or #4 works well.

  8. #208
    New Member Custom Splice's Avatar
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    If I can find more of the correct wire, I will include it with the orders for the 1/8th and the 7/64

  9. #209
    Member klaatu's Avatar
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    Quote Originally Posted by Custom Splice View Post
    If I can find more of the correct wire, I will include it with the orders for the 1/8th and the 7/64
    Please count me in if you can!

    Mike
    One day I'll come up with a clever sig.

  10. #210
    New Member Custom Splice's Avatar
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    mike,
    I will go to the store in a few minutes.

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