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    Modern AI Tech

    If any y'all have CS training you'll recognise the recursion being at least one part of the AI's demise. comma comma period period period :) Has anyone come to recognise AI slop on youtube, common voices techniques etc?
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    Modern AI Tech

    Remember the good old days when telephone annoyance was - [ick up a call, say hello, wait and hear silence and just when you're about to hang up a machine which dialled to you switches you to a scripted (scam/telemarketer/survey) operator who wasted your time? After enough calls I developed the...
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    vertical speedline size/weight limits

    I remember when I first saw Matt's cart up an incline groundie that I wondered about the creation of the big, largest(?) first load spike at the initial tensioning of the rig rope. In snubbed off the groundie is just an immovable boulder for practical purposes. In a run and catch the groundie...
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    Nerd Alert

    I knew I saw it somewhere. I finally relocated Coach Stribeck's ;) presentation of his graph. Warning, for some this never happened and can't happen (knowledge). About 5 minutes in this guy explains coach Stribeck's mu vs x-axis graph. Arborist pulleys are pretty much at the left edge...
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    Nerd Alert

    As a kid we were building upside down "slider chopper" trikes, bicycle trailers and such. It was cheap junk, no bearings, all bushings. Unmaintained junk that we happily cut up. We didn't even know what lubrication was. So sometimes at speed a wheel would break into a squeel or howl, maybe a...
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    Nerd Alert

    Rope Bend Losses or Bushing Friction Losses These two factors both undoubtedly contribute to losses that create the tension ratio of a rope bending a redirection path around a pulley. There is a similar dual contribution of rope bending a path around a bollard and simultaneously skidding...
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    Break test on a climbing line that has been “spiked”

    Seems like too much to me - 10% and 25% losses on parts of the rope being ok (Ghostice's Samson link). Based on that a spiking doesn't seem deal breaking. I'd climb on such a compromise but I wouldn't try too hard to defend it to an authority.
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    Nerd Alert

    Porta-Wrap Calibration Been scratching my head on this since a thread on porty nomenclature came up. As a device the porty is a pure example of tension ratio, big rope tension side holding the log and small tension side being held by the groundie. It's ratio is determined by the wraps and...
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    Portawrap minimun wrap, add'l wrap nomenclature

    One other aspect - Dynamics Let's take an example porty that works a bit better than the BMS at 2 1/2 wraps - let's say it achieves a tension ratio of x20 or 20:1 instead of x18, to make the math easier. To hold the log still: tiny log 20 lbs only takes 1 lb at the groundie's hand 200 lb log...
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    Portawrap minimun wrap, add'l wrap nomenclature

    I found this in a 2023 post of mine: " Courtesy of Kenny I'm more aware of the non-linear nature of wraps. They're exponential. A similar device measured: W34 1/2 wrap BMS belay spool tension ratio 1.9 mu 0.20 W35 1 1/2 wraps BMS belay spool tension ratio 6.6 mu 0.20 W36 2 1/2 wraps BMS belay...
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    Love tree work. Not the tree business.

    I'll bite. Which vaccine causes which cancer? HPV vaccine causes cervical cancer? Only connection I've heard. Smoke byproducts and asbestos prevent lung cancer?
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    Portawrap minimun wrap, add'l wrap nomenclature

    All my first double whip lowering was done off natural crotch and stubs. It seemed inescapably logical to do. Then I realised you could add more gear to the mix. Free form bollarding :) Fortunately I never experienced springtime cambium natural lubrication. Never did bigger pieces. I did...
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    Portawrap minimun wrap, add'l wrap nomenclature

    Chart might have been Dan Thornton. Wasn't Treespyder. Maybe on a BMS spool thread.? Spool has three different wraps settings whIch I made a "chart" for - might be the connection.
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    Portawrap minimun wrap, add'l wrap nomenclature

    IIRC someone posted a chart of tension ratio (weight of log / pull force at groundie's hands) for different porty wrap configurations. It goes up rapidly/exponentially with the minor extra constant of the two 90's over the rods where they meet the barrel. The rod 90 bends count a little more...
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    Courant Kalimba

    I once R+D'ed pure parallel fiber "tendons". Holy no stretch Batman. Spectra, vectran and kevlar. Nothing wanted to "glue" to the spectra, it was slippery. Glued the knots! More like encapsulated. -Derail- oops On splice grip, hownot2 overload slipped a VT on dyneema. Was smoother, less...
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    New device from ISC

    Maybe someone needs to crack a vernier and measure some wear gaps or bollard spacings to see if there's really a wear problem or whether the design gets/got tweaked? Make for an interesting rabbit hole.
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    Courant Kalimba

    Are we talking pure yarn/filament parallel core or paralleled slightly twisted yarn bundles core? Rarely see the former but more often see the latter.
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    Courant Kalimba

    I have a faint recollection that parallel core construction rope is not a candidate for splicing. Brocky?
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    Nerd Alert

    Saw a yt vid interview of Fender's ceo prior to the stratocaster copy cease and desist issue and they were talking about the 75th anniversary of the telecaster. Story. In high school I got a 63 jazzmaster but wasn't happy with the neck (still, a cool guitar) so I ended up at a guitar...
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    Tie-In-Point Backup?

    Exact thought that crossed my mind way back when 2 ropes was announced. Of course similar reasoning can be applied to 2-tie-ins, lanyard/saddle/bridge/lifeline proximity. Spar work in particular. Ever watch Reg increment the bar towards his belly when blocking? : 0 Cool as a cucumber...

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