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The pictures drawn below, show how to get more force working on target
load. Though, through a different route than we are used to.
To every effort of pull on the line, there is an equal and opposite
effort. These strategies show how to take that promised E&O effort
you exert, and capture it in the mechanics to turn it around and help
work on the target load. The things to watch are how the pulley on
opposite side of you than load, recycles the E&O force to a useful
direction. And, how the man '2hands' the rig, in a pattern that
places both pulls on load, for 2/1. |
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Click any of the pictures, for a full
page view of them. |
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| A) - 3 scenarios, looking at how to generate force on scale.
1st a man's weight hanging to read 100# on scale. 2&3 exert a 40#
hand pull, but get different results; because of pattern of applying the
same effort . |
E) - 4 scenarios of potential climber adjustments, made
while pretightening line connected to branch he will cut and rig out.
These 2/1 increase advantages, are only available to the climber
position! |
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| B) - Continued from (A); shows that a 3/1; is a 2/1 with
pulley added at the base anchor to increase 2/1 up to a 3/1. Thus
proving the #3 drawing in (A) & (B) is possible, though it doesn't seem
so; 2 handing works! |
F) - continued from (E) . Shows that in a 2/1 rig
or a lever, you can calculate the force produced from the man's pull.
But that calculation must be adjusted by the pull on the opposite end of
the line/ push of pivot! |
.jpg) |
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| C) - Shows how a 2/1 can be gotten from a come-a-long,
by placing a pulley on the anchor and recycling the E&O to pull on the
targeted load, instead of running away from the job like E&O usually
does! |
G) - Linear efforts are not as powerful as tourqued
efforts. For tourque, use forces of opposite directions, that are
not inline. For maximum, place these at the opposite ends of stiff
shape. |
.JPG) |
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| D) - 2handing
proof; shows that a pulley on the anchor can double force too, not just
a pulley on the load |
H)- Extending theories, to applying tourque, rather than
linear responding forces in a hinge. Kerfing under lean, or any
more closed face on lean side, gives forces moving in opposite
directions, for tourque. |
8/1/4 (Always Under
Construction & Expansion!)