Let It Run

Discussion in 'Rigging and Roping' started by Todd L, Nov 16, 2017.

  1. CutHighnLetFly

    CutHighnLetFly Well-Known Member

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    Yes. The rope comes out the porti poorly when you take a half wrap. Your almost better taking a full wrap and throwing rope at it at the right time. I've tried but have found no success in using a porti with less than a wrap and getting consistent good rope running
     
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  2. southsoundtree

    southsoundtree Well-Known Member

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    Do you mean just a half-wrap versus just a whole wrap. I can see this spiralling down the barrel differently and catching into the notch a bit.

    I also like to clip a re-direct biner to the top of the POW for less friction than a wrap.
     
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  3. JontreeHI

    JontreeHI Well-Known Member

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    Yes exactly Sean
     
  4. Daniel

    Daniel Well-Known Member

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    there is no such thing...
     
  5. JontreeHI

    JontreeHI Well-Known Member

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    Portawrap is everything
     
  6. southsoundtree

    southsoundtree Well-Known Member

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    For a half-wrap weight, you might try a munter on that redirect biner on the top of the POW, if a plain re-direct through the biner is too much. MAYBE clip it through the biner twice to get a round-turn on the re-direct biner for more friction.

    Redirect on biner
    Round turn on biner
    munter on biner
    full wrap
    wrap and a half

    ???
     
  7. TheTreeSpyder

    TheTreeSpyder Well-Known Member

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    Some nice tips to getting experience and actual handling!
    .
    i think another tip to play with / get experience in less critical situations is rigging take down into soft dirt.
    >>allow dirt to take about 400# hit from 400-600# log, that ground control just doesn't let accelerate , not really catches full force; can work on that separately!
    We have many times had truck pull lift a load back into position to drop again; very helpful to be able to do impossible in real world : have same size, drop, weight,rig and only vary technique and experience over several tries
    >>should look to 'harvest' these opportunities when present and quickly play out; shows how relevant this is to groundies to even take time to know!!
    .
    In actual use would work to take as much hit as possible off the line; before handing to the system initially
    >>pre-tighten (even if to allow controlled run later) as mentioned
    >>if any friction points in system (branch not pulley as re-direct etc.) pre-tighten on either side of them and back thru
    >>sweat/swig line hard to raise tension in section, then take 'purchase' thru 'bitts' of frictions
    >>if overhead rig can hitch load out from cut and use load tipping down to help pre-tighten
    >>if rig point under load; make hitch points as close as possible
    .
    Inversion of vertical load to rig point under ; if load not too long , can rotate still hinged pretty far, sometimes even re-tighten line some before tear-off of hinge for least rope impact.
    .
    For a partial friction redirect, i used to have a large aluminum clevis i ground numbers off (under water not to lose temper); frictional re-direct gives less support loading; aluminum can get hot/dissipates heat very well
    >>Climber can help pretighten by hanging on control side (no weight on lifeline as safety catch) and pull up on load side for 2xEffort + weight (x impacts given of each) against load and frictions;
    Frictions buffer fighting purchase,but then helping hold any purchases taken!
    >>with foot cam can impact leg lift to control side to double (but thru frictions), rather than arm lift to load side
    .
    Now, as far as friction force on Porty as a device;
    more Turns does give longer frictional path, but this is only the nominal change.
    >> the force wants to take the minimal path of least loading : a straight line
    >>view as on curve this as a 180 degree wrap, another folds the force back against self in this linear visualization.
    So, simple,single Turn is minimal friction against host mount 180degrees; only bight of Turn gets intense contact.
    >>vs. RT RoundTurn / Real Turn that has 3 180's and a game changer of force against itself as grips host mount.
    >>This is the difference felt educate eye to see; more turns putting stop to even largest loads too easily..
    .
    Thus, on a winch, would never have load pulling right on the cable to spool connection
    >>Would not even do any real loading pull with a simple Single Turn before cable connection
    >>Would prefer not to even trust RT to this
    >>Would prefer allow load pull to get thru cable to spool connection after at least Dbl.RT; so no real loaded pull on connection!
    Turn passes force w/some reduction, RT is real reducer, Dbl.RT(5 180's or more) can seize easily on many loads/need real loading to relief to not have possibly dangerous sudden impact stop loading
     
    Last edited: Nov 23, 2017
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  8. jim454

    jim454 Well-Known Member

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    I didn't read all the responses so forgive me if this has been mentioned. I just just send out a yell, " 8" diameter- 10 footer". Groundy knows what to do, and he does it well.
     

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