Thought i'd take time to explain more comments from last week
.
i don't say much about backleaners cuz to me is just pull from rear position into high noon over stump and let splash down on target side
>>just follow prescription of front leaner after brought into place
>>except can't really force hinge same strength and hinge probably has to be thinner for more flexing, and more open face to allow movement.
Backleaners are a fair test of theories, and nerve tho!
.
edit:sorry not exporting correctly to web publish side so segmenting pic:
C (in pic)>Now supporting hinge is in more normal forward lean state of CoG "lunar cycle".
Without sideForces this all happens on the same axis of least resistance across the narrowest path of supporting hinge.
This would be a 2D(imensional) fall scenario
>> 2D scenario classification includes direct backlean Per pivot of compressed part of hinge as pivot, and downward gravity force column to pivot as 1D:
>>1D(imensional) telephone pole model is not a fall, until other acting force gives imbalance
>>2D is simple fall forward w/o sideLean but includes 'simple backlean' w/o side forces
>>3D scenario finally invokes side forces into the mix
>>>>tapered hinge is control side ballast against side force to neutralize 3D to 2D scenario
>>>>step Dutchman is a 'late life' correction diverting force flow 3D over run to 2D scenario
>>0D is CoG alone, will fall to Earth like a negative ground calling a positive charge (in my imagery)
>>0D is NOT pivot, for pivot is position is defined as closest /most efficient support of CoG
***CoG is the only active,persisting force as force input to passive/RESPONDING tree architecture***
***Pivot, compressions, tensions etc. are all passively responding forces AND positions***
1D is not a fall,cuz is in balance. Only imbalance 'wanders' seeking equall/opposite that balance already has
>>world is in balance cuz item out of balance moves to balanced,motion itself making up the temp. imbalance
.
.
.
http://mytreelessons.com/images/over-the-top-pull.png[img]
.
[img]http://mytreelessons.com/images/tapered-hinge-ballast-dutch%20correction-against%20side-lean.png
.
.
Something i've referenced before,but not pushed out too strong is this theory;
it seemed to serve me well as i grew more confidence with it; but didn't get enough trials, especially in backleans to fully recommend w/o reservation
i only tried in good woods, and it seemed more suited to felling trials than 'in-tree' cuts/rigging.
.
.
Going for easier start, forcing thicker hinge, then more bolstered support as things commence.
Sine is the mathematical leverage of lean
Sine changes MOST drastically, for highest IMPACTING changes in first 15degrees benchmark to either side of pure vertical (and really on into 30 degrees)
With the full leveraged length and loading of a tree any change can be IMMENSELY good or bad per it's disposition!
Shallow and rear leaners can be very tricky for this reason; and any cards played into hinge, lean etc. can be critical!