Anything that arcs without bending, can give leverage as one end is moving slower than the other from same force. As we approach giants, as in trees; this can be witnessed and employed many ways for and against us.
A first class lever does not pivot from the end; a non-first class lever does. A first class lever takes up more room for the same leverage, but allows the magical power of balance in tradeoff. The input force into a first class lever moves the opposite direction as the output force; in non first class, both forces move in the same direction.
In rigging before tearoff, the pivot is generally the hinge, thus pivot on end, non-first class lever. After, tearoff (not butt or top tyed); the hitchpoint becomes the pivot, not on the end, so the system achieves 1st class status; availing it to the magic of balance.
IMLHO- Iff, while still hinging, the line/hitchpoint holds most of the weight of the branch; then that hitchpoint becomes the pivot; system arrives at first class lever status. If, then the load is close to balanced; the hinge does very little werk, and can hang on and direct/ sweep branch around more fully. As like if there was a 5000# log balanced on a pivot, and you could with butterfly lightness of one finger move it into any position, cuz it was balanced on a mid pivot. i think that rigs set up where that balance is close to there on tight line, the strong hinge is relieved, and has more than enough strength to serve the head around, with the same butterfly lightness, just by crossing these worlds, and invoking balanced first class lever in load system before tearoff of hinge.
Even if the balance is off (C.o.B. should be farther out than hitch commonly); the balance and line together are doing so much of the work of load support, that the hinge goes from pivot point to input force point- the mechanics and leverage class magically change, unseen; and system is in such supported balance it needs very lil’input force from hinge to be commanded around.
All this can also in lesser forms augment other support strategies to task. But these principals/patterns i believe are pervasive enough to their possible effect in any rig; how they can help or hinder.
edited line in attatchmeant, to make more sense.
A first class lever does not pivot from the end; a non-first class lever does. A first class lever takes up more room for the same leverage, but allows the magical power of balance in tradeoff. The input force into a first class lever moves the opposite direction as the output force; in non first class, both forces move in the same direction.
In rigging before tearoff, the pivot is generally the hinge, thus pivot on end, non-first class lever. After, tearoff (not butt or top tyed); the hitchpoint becomes the pivot, not on the end, so the system achieves 1st class status; availing it to the magic of balance.
IMLHO- Iff, while still hinging, the line/hitchpoint holds most of the weight of the branch; then that hitchpoint becomes the pivot; system arrives at first class lever status. If, then the load is close to balanced; the hinge does very little werk, and can hang on and direct/ sweep branch around more fully. As like if there was a 5000# log balanced on a pivot, and you could with butterfly lightness of one finger move it into any position, cuz it was balanced on a mid pivot. i think that rigs set up where that balance is close to there on tight line, the strong hinge is relieved, and has more than enough strength to serve the head around, with the same butterfly lightness, just by crossing these worlds, and invoking balanced first class lever in load system before tearoff of hinge.
Even if the balance is off (C.o.B. should be farther out than hitch commonly); the balance and line together are doing so much of the work of load support, that the hinge goes from pivot point to input force point- the mechanics and leverage class magically change, unseen; and system is in such supported balance it needs very lil’input force from hinge to be commanded around.
All this can also in lesser forms augment other support strategies to task. But these principals/patterns i believe are pervasive enough to their possible effect in any rig; how they can help or hinder.
edited line in attatchmeant, to make more sense.
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