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  1. #11
    UncleMJM's Avatar
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    Quote Originally Posted by PapaSmurf View Post
    Here's a little chart I made so I didn't have to calculate the bury dimensions each time.



    Disclaimer - I figured these using infomation I obtained from Samson's website and posts on HF. They work well for me, but I'm not a math kinda guy.
    Great chart!

    I like the taper length info as well.

    Is the taper considered part of the bury or in addition to?
    Last edited by UncleMJM; 11-17-2010 at 11:47. Reason: lousy spelling

  2. #12
    PapaSmurf's Avatar
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    Quote Originally Posted by UncleMJM View Post
    Is the taper considered part of the bury or in addition to?
    In addition to, but I don't really pay much attention to the exact length of the tapered area.
    I just make the taper, then measure & mark the bury afterward.

    From the Samson eye splice instructions.
    "By following the procedure below, the splice can retain from 90% to 100% of average new rope strength..."

    I wonder. Are we really aiming for 90-100%? Seems overkill?

  3. #13
    i did a little testing, results below

    this is before i ever knew about the locked brummel, so the test was a (plain?) unstitched bury with no taper (also, was a single strand w/eyesplice in both ends)

    7/64" ASB 2" bury, no taper (slipped at 1200#)
    1/8" ASB 3.5" bury, no taper (slipped at 2100#)

  4. #14
    Senior Member
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    can everybody view the chart?

  5. #15
    PappyAmos's Avatar
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    Quote Originally Posted by bruinfan View Post
    can everybody view the chart?
    Nope! Guess we ain't been here long enough or somethin.

    C

  6. #16
    in it for the naps oldgringo's Avatar
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    Quote Originally Posted by PappyAmos View Post
    Nope! Guess we ain't been here long enough or somethin.

    C
    I've been here awhile, and can't see it, either.
    Dave

    http://www.uark.edu/misc/xtimber/rna/pattonsbluff.html

    It has always been my private conviction that any man who pits his intelligence against a fish and loses has it coming.
    John Steinbeck

  7. #17
    swoody126's Avatar
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    Quote Originally Posted by PappyAmos View Post
    Nope! Guess we ain't been here long enough or somethin.

    C
    DITTO

    i promise i'll use DEODORANT & BRUSH MY TOOFIES(no hair to comb), next time...

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  8. #18
    Senior Member DemostiX's Avatar
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    Old thread here that contains the usual concerns and notions about the locked Brummel as part of buried splice. I found Warbonnetguy's post instructive about failure, with buries that were short. But, by failure we just mean slipping, not rupture. The short buries he used and tested still preserved about 3/4 of original strength.

    But, the stimulus to post here was finding this:

    I see you use a Mobius Brummel splice. How many have you had tested to failure? The last time I was at the testing facility at Samson, we proved that any brummel weakens the rope unacceptably. The rope ALWAYS fails at the intersection. The only thing to recommend that splice is that it does not need to be locked. Testing to failure shows that a simple tuck and bury splice is much stronger (it must be lock stitched however). The strongest splice was a total 63 x diameter bury, with the first 21 diameters untapered. These samples fail at random points, not always at the intersection of the bury

    http://www.boatdesign.net/forums/sai...ies-24097.html

    [Apologies that this URL seems dead. The author is Brion Toss author of rigging books. I'll update when I find where this is now parked.

    Notice that the first third of the bury, 21 diameters, approximates what Warbonnetguy used to get his tested findings some long time ago.

    The message is that however much fun and whatever a feat it is to include a Brummel in the splice, leaving the Brummel out and stitching a long and well-tapered splice preserves the last bit of strength of the cord

    Is it worth it to stitch? Your call.

  9. #19

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    FWIW there is also the issue of consuming length when making the bury. When I made the pair if whoopee's I have I aimed for the length of buy the instructions called for as a final length and consumed about 2 inches of 1/8' with the expansion of the outer shell as it is opened up to accomodate the line fed through it. In retrospect the bury length expansion was proboably figured into the marking instructions. OTOH the extra bury does not hurt and does help keep things together. My point is that whatever you measure you need to know that it will shorted when you feed line through the center.
    YMMV

    HYOH

    Free advice worth what you paid for it. ;-)

  10. #20
    Senior Member Gravity's Avatar
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    Simple instructions for whoopies:
    https://www.hammockforums.net/forum/...ad.php?t=70189

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