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  1. K

    Break Testing

    Here's a different, briefer version of a false bowline in Fig.8 mid-flype base. In this knot, though briefer, the end makes some compression upon itself (a sort of Half-hitch locking), which along with the strong nip of the mainline's (S.Part's) turn into the collar around the eye legs, and the...
  2. K

    Break Testing

    [ QUOTE ] Okay, Here is an attempt at sending a brief video: [/ QUOTE ] ... a successful attempt -- great! [ QUOTE ] The knot is the "locked" Bowline variation in which the end is taken twice around the standing part before it goes down through the loop to finish. [/ QUOTE ] NO! Sorry, but...
  3. K

    Break Testing

    [ QUOTE ] Hi again, I took a brief video of one of the locked Bowlines crawling, and will upload it as soon as I figure out how (I am a confirmed Techanderthal). [/ QUOTE ] Bravo! I feel your pain. Getting photos up, at last (this is 2009, eh?), I count as my personal breakthrough. [ QUOTE ]...
  4. K

    Break Testing

    [ QUOTE ] We had just a few minutes today to test some knots. First, we repeated the test with simple Bowlines, and observed them crawling at about 10% of rated break (certainly not 15 or 20%). They crawled right down to the shackle pin, then began untying. [/ QUOTE ] Firstly, is anyone TAKING...
  5. K

    Break Testing

    Testing note: It should be possible to STITCH INTO TEST SPECIMEN some thin bright thread to mark position, which can help to document (via observation and preferably photos / video) rope deformation/movement/rupture point. For this purpose, it probably makes sense to stitch just around some...
  6. K

    Break Testing

    [ QUOTE ] Normal Bowlines, in Amsteel, start crawling at about 10% of rated strength. They crawl right down to the Figure-8 stoppers in the end, and then, very weirdly, the Figure-8's start crawling apart. [/ QUOTE ] Wow, this is very hard to believe! Pardon, indeed, but there is after all...
  7. K

    Break Testing

    A second eyeknot to test is a sort of derivative of Ashley's #1425 bend, where the interlocked Overhands of that bend are seen as abbreviated symmetric "fig.9" knots (stopper #525 being the whole magilla). Photo'd here is one such not that has had substantial loading (on the right) and one in...
  8. K

    Break Testing

    [ QUOTE ] Tell you what, next week I'll be breaking some pieces of HM as part of a course we are teaching for Coast Guard inspectors. The idea is to demonstrate the danger that knots in HM can pose for charter vessels. I'll see if we can photograph the tests, and forward the results. [/ QUOTE ]...
  9. K

    Break Testing

    [ QUOTE ] When the rope breaks like in my video it would be my first thought this is due in part to the lack of fibers ability to stretch on the knot side. [/ QUOTE ] I think you could have confirmed that the particular fibers that broke in your rope were those at the inside (concave side) of...
  10. K

    Break Testing

    And here is an "Eskimo Bowline", also capsized in CEOlefin mooring line. The once-a-loop-becoming-a-spiral "rabbit hole" part is seen clearly on this side, with one green marker strand which points down-right at a red strand in either the end or the end-side eye leg; the collar, which is...
  11. K

    Break Testing

    Firstly, let me make clear that I take the warnings re knots in hi-mod (any of HMPE, Kevlar, Technora, Vectran) to be valid until better information is known. I'm just resisting the assertions that good evaluation has been done, and pointing out that of what reaches general public consumption...
  12. K

    Break Testing

    Here's roughly the same "bowline" but in a capsized form (making it what might be called a Pile Hitch noose); I really don't think that such structures are tied as found, but have in fact deformed in use. It is not an uncommon finding, to my eye. *kN*
  13. K

    Break Testing

    [ QUOTE ] [ QUOTE ] ... hundreds of break tests / thousands more ... [/ QUOTE ] Where can well-documented reports of all this testing be found, for review & understanding of methods & results? *kN* [/ QUOTE ] ... Still, I can assure you right now that we tested numerous versions of...
  14. K

    Break Testing

    [ QUOTE ] [ QUOTE ] ...Let's just ignore for the moment the many incidences of slippage well below this load, and not just in textbooks... [/ QUOTE ] ... I guarantee I leave enough tail on the bowline that it won't slip. [/ QUOTE ] Rather than merely leave tail, do something with it -- tuck...
  15. K

    Break Testing

    About that "25%" : yes, the YouTube shows "25% capacity", mistakenly. It happens, though, that the recommended WLLimit of 8,400# amounts to 25% of the break, whereas it had been 20% of new tensile. (42,000 => 33,000). With a little *spin*, this can be a correct video! The break was shown...
  16. K

    Break Testing

    [ QUOTE ] Mark. Can you test the 1/2" inch Amsteel with a bowline & running bowline? That's what I'm using for crane jobs. [/ QUOTE ] This was done by a university on the left coast for forestry interests; the bowline didn't break, but slipped untied, at around 20% IIRC; with a stopper...
  17. K

    Tail tying lava

    In his presentation of the hitch way back when ('90) in Nylon Highway (NSS-caving), Prohaska advised adding an extra wrap at the away end of the "Blake's" ("ProhGrip", seems apt) in cases of slippery line, or to add one at the near end (going around object line & tail) if the problem was...
  18. K

    treeclimbing rope versus rock climbing rope

    [ QUOTE ] What makes the 2 types of rope different. [/ QUOTE ] Different materials (polyester v. nylon), different construction (the dynamic rope is kernmantle--a sheath-contained core of multiple, hard-laid (balanced between Z- & S-lay) strands, which are very elastic). [ QUOTE ] I...
  19. K

    Remarkable survival or coolest cat trick ever?

    It's dating a racoon. (-;
  20. K

    What do you do if you know there's bees in a tree?

    Re: What do you do if you know there\'s bees in a t Here's one taken w/flash one warm night, so there was a big crowd out at the lower half of the 20"? opening to the tree (which shows hard whitewood immediately within, on which the bees crawl up and around to surely some bigger space). Bee...

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