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FRANKIN STICK (twisted fiddle stick)

Discussion in 'General Discussion' started by Rapterman, Sep 8, 2015.

  1. Rapterman

    Rapterman

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    The FRANKEN STICK is the newest 'twist' on the fiddle stick.
    Made from our custom extruded and thermoformed Polycarbonate (Lexan) plastic.
    When the rappel rope is weighted the FRANKEN STICK is highly resistant to pull out.
    With 100 lbs of rappeller weight on the rope, it takes more than 400 lbs of force to
    dislodge it!
    Yet the FRANKEN STICK releases 'normally' once weight is off the rope.
    Lab testing is complete and we have begun field testing...
    Coming to canyonwerks.com soon!

    frankin stick test 1.
    Last edited: Sep 8, 2015
  2. Deagol

    Deagol too many hobbies

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    interesting.. looks like it should be coated in cinnamon, though..;)
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  3. Blake Merrell

    Blake Merrell Lovin' Utah's Backcountry

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    Very cool! and very creative. I am impressed!
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  4. Blake Merrell

    Blake Merrell Lovin' Utah's Backcountry

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    Will you be posting test results of how this compared to the Fiddlestick and smooth operator?
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  5. Blake Merrell

    Blake Merrell Lovin' Utah's Backcountry

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    and.... i do love having the two holes on either end for safety carabiners. :)
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  6. Rapterman

    Rapterman

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    Good ideas, Blake!
    We will do some tests on the other toys as well.
    The FRANKEN STICK has a natural tendency to 'stay put' due to the ridges from the twist.
    Once the rope is tightened, the FRANKEN STICK really cannot pull straight out- it has to spin out
    like a wood screw.
    And the way the pull cord is set up it helps to block the spin, until the weight is off the rope and the stick can tip down wards.
    Here are two pics of the FRANKEN STICK in safe-mode.
    In the second pic we are pulling down hard to show that it cannot release in safe mode.

    franken stick 1. franken stick 2.
    Anna and Blake Merrell like this.
  7. canyoncaper

    canyoncaper

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    Interesting.

    Sent from my SM-N900V using Tapatalk
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  8. Rapterman

    Rapterman

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    That it took 500 lbs of force on the pull cord to dislodge the FRANKEN STICK with just 100 lbs of weight on the rap line kinda blew my mind.
    Now THAT is a safety margin!
    This is the only stick I will LAMAR on.
  9. Cameron

    Cameron The canyons are my playground

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    hmm.
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  10. Wes1

    Wes1

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    I would be curious as to how much force it takes to release the Frankin stick after X amount of weight on the rope. Then I would like to see that compared to a fiddle stick, or smooth operator. Neat idea!
  11. Rapterman

    Rapterman

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    Hey Wes
    Our testing so far on the FRANKEN STICK only:
    50 lbs of rappeller weight : 290 lbs required to 'trigger' a release
    100 lbs of rappeller weight: 500 lbs to trigger release
    155 lbs rappeller weight: 570 lbs NO release (we stopped before the pull cord broke)

    Our goal with the FRANKEN STICK was to have a releasable stick where on a long, straight drop (say, Heaps final rappel)
    with body weight on rappel, it would be virtually impossible to trigger- as in, someone could swing around on the pull cord and not trigger the pull!
    While there are still LOTS of other ways things can go wrong with fiddle- sticking we hope that the
    FRANKEN STICK will add a little bit more margin of safety.
    Both Tom and Luke have published detailed instructions/protocols for stickin', and it is still essential to follow
    these steps carefully.
    We will post field testing soon.
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  12. Wes1

    Wes1

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    I was thinking more along the lines of force it took to pull out after the rope was unweighted. I've had a times where the fiddle was hard to pull out after many people rappelled on it, this problem can be mitigated by having LAMAR un cinch the knot before heading down. Maybe the FRAKIN Stick takes more effort to pull out( once rope is unweighted)maybe not?
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  13. Rapterman

    Rapterman

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    The FRANKEN STICK probably will take a little more effort to pull, but a lot depends on the condition of the stick (new or 'roughed up').
    We see the max force to pull a new un-weighted FRANKEN STICK at 30-50 lbs.
    Once you beat- up the stick the max pull can go up to 80 lbs.
    Sanding the stick to smooth it out brings the max pull back down.
    'Loosening' the Stone knot a little before starting makes the pull easier- just make sure you reload the stick with body weight before going
    over the edge to make sure the knot has a good grip on the stick.
    Because the ridges of the FRANKEN STICK get 'gripped' by the knot you do NOT need your whole crew to tighten the knot by rappelling on it first.
    One rappeller, then LAPAR is enough. Or LAPAR can tension it with body weight at the anchor before removing the safety.
    Anna likes this.
  14. Kuenn

    Kuenn

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    Impressive expansion of the invention... dare I say, "new twist" of an existing idea. And equally impressive are the metrics increasing safety factors.

    So, Rapterman what's in the name "Franken" or is it a twist on genetic engineering?
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  15. Rapterman

    Rapterman

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    FRANKEN STICK with a STEIN knot.
    :D
    plus... Carl our gear tester LOOKS like Frankenstein!
  16. hank moon

    hank moon lovely ligatures

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    Max pull force depends (in part) on the tension in the rap rope at the stone knot, eh? What load was used for the numbers above?
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  17. Rapterman

    Rapterman

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    Very true!
    On the tests to see what it took to release the stick (with no rappellor on rope) we 'pre-loaded' the rappel rope
    with 150 lbs, then I hung on top of the weight bags (another 150 lbs = 300 lbs total) for a few seconds, then we removed all weight to check the pull.
    Given that some people are heavier and might 'bounce' a little we wanted an 'honest' test.
    All testing so far on a used 8mm Zion Pro (Bluewater)
    hank moon likes this.
  18. hank moon

    hank moon lovely ligatures

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    So, what would you say is the rope tension at the time of stick release? I'm wondering what release force would be required for (say) a 300' free-hanging wet rope.
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  19. Rapterman

    Rapterman

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    Another good consideration!
    Get out a bucket...we need to soak a big rope....
    hank moon likes this.
  20. Mike

    Mike epic blarneys

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    I love the whole evolution of the sticks. I've got a cool collection going with different models/prototypes. Digging the interesting take on the simple concept. From the last thread about sticking and Heaps, I was sure you were very anti, something change?

    Also, I feel like putting weight ratings is misleading. Your test show it in a free hanging situation, but those situations are extremely rare. Once rope is in contact with rock the pounds of force needed to pull will range all over the place. I've pulled sticks out on folks hanging on rappel (very low to the ground, in the name of science) in a variety of situations and its ranged from needing two sets of hands to one good hard pull on my own. Its possible these ideal situation pull tests could be helpful if you were to do so as brand comparison.
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