Re: Natural crotchin\'
i'll agree with Mahk that know, no lines are really suited to this. But, rather; then try to control the loading, to not get to the glazing and smoking point(s).
i'll keep loading lower when i can, and on good supports that i don't have to run the line to lighten the support loading. Going more for overhead rigging, on pretightened lines. Pretightend by hanging on them as ground control pulls too, swigging the load side upwards (across giving leverging upwards giving 2:1 - friction of the effort), sometimes using foot cam; using wide open faces that we work the hinge hard to dampen the forces switching over to rope fiber from wood fiber.
i do this by not dutching (for sure not both sides) to keep the open face sweep; sometimes pushing on, standing on the load, wedging or leverging with semi trailer tire spoon as i push also(another 2:1 for effort the push goes into the lever with right hand and to the load with left) - anything to work the hinge fiber harder and avoid free fall into rope; but rather contain a soft handoff of load into rope. The open face assures i don't limit how long i can do this; for i'm done when face closes/ it functions as the mechanical stop. Then the actions switch to either seize or tearoff.
Also, as the rig point on the load, moves away from the support point; i use this distance of movemeant on the hinge, to further pretighten the line. Sometimes even flexing slightly left with load, against the right pull of the line (for the farther rig point moves from support the tighter line gets); to keep a tighter line on load; and then let line pull load around on hinge to the real target right direction. For in low shock loading and direction rope pulls; "Play don't work!"
"Rock Around the Clock" is one thing i've called it; because you go left around, to go right.
This all depends on the tension, you can get in the line, so we pretighten, get friction of support close (so that there is less line to take the relief of stretch from, so therefore must support/ limit movement), use less dynamic line (or line set like a 2:1 is less dynamic, but control line lowers at 2x speed but half loaded so have to watch that end of it) etc. Sometimes the amount of firction is increased by using a Round Turn on the support, rather than a Simple Turn.
A Round Turn on support does give some complications: Retrieveal, pretightening and too much friction. Most can be solved with a remote re-lease. i place a krab on rope on the bottom Turn, this allows the Turns to be worked individually, thus allowing easier retrieval. But also, allows pretightening, it allows this even by a perpendicular swigging/sweating action of high leverage. Even on lowering you can sometimes pull this Turn 'open' (if too much friction to slide) for more free travel, but that can get jerky and impacting if you have to segment the action and it just doesn't travel smoothly, with the bottom Turn 'closed' or 'open'.
Remote Round Turn Sweat and Removal
