i too spent much time trying to decode those Dent Drawings,
joining with the text trying to extrude the gold.
>>put that lil'book down many times as it beat me so bad,
>>but it disturbed my sleep and called me back months later; over and over..
Eventually(after embarrassingly long time.. )
>> it seemed like common sense, saw Mr. Dent's models in more things...
>>even taking the model upstairs to limbs>> was all the same once caught the concept(s)
Mr. Dent totally changed/focused my game and confidence.
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For urging more towards horizontal sweeps in tree:
>>Tapered hinge where down is the side pull and more across as faced target
>>but not going for 90 across flat horiz, offering relief as goes that branch can hungrily chase
>>45 degrees gives 'squared forces' of cos=sine expressed
>>equal downward stress to sidewards stress in hinge of same wood..
Bargain with limb, use it's downward force to extrude some sideward
>>ain't gonna beat it many times, it has to want to follow path
>>keep slow as not to invoke speed multiplier SQUARED
>>keep steady w/o stalls as no impact
Rope Rescue mantra: slow can be steady, steady can be fast
>>is another version of old careful turtle outpacing young jumpity rabbit.
>>lean and clean progress w/o surprises can bring safely home.
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To this real fave the triangle hinge/ i always called tapered hinge;
i find the 2 extreme dimensions of: face and 90degrees from.
>>length of greatest leverage support across face that leaves minimal leverage against fold axis
>>cross axis of referenced path dimension, and it's non of totally not in that dimension
Round whole tree as 'hinge' gives equilateral leverage all around,
>>our strip/rectangle hinge does not, plays favorites
>>it favors to yield on the fold axis and greatest leverage against side dis-track-tions
>>Tapered Hinge avails giving imbalance of that greater leverage
>>against greater side pulls
Re-apportioning the same forward resistance, to at same time have greater side resistance
>>but specialized to only the side lean side
>>by in trade not 'protecting' the opposite side of side lean with by the re-apportionment
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Fat tapered side of hinge as ballast against the cross axis/side pull force
>>to neutralize or filter out the side pull quantity
>>to then only reveal the forward pull remaining quantity(in simpler forward-ish lean scenario)
>>an off balance side pull ballasted out by the off balance of hinge fiber to opposing side
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Off-side(Dent term) pull imbalance to side met with countering that pull in hinge.
>>Dutch step does this to same side as pull, invokes velocity
>> e=mc2 shows that the static Mass is a smaller multiplier than the speed SQUARED;
AND gives pivotal change, as any hard close, but in step to 1/more loaded side.
Dutchman can capitalize from speed, but is only a tax against tension.
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As fall starts we have the most compressed pivot position between load CoG and tension support
>>everything else is much less, mostly only distance multipliers for CoG and tensions
The close takes leverage from the CoG side and gifts to the tension hold side
>>at the same time, for greatest effect with greatest impact
>>done to one side can be corrective against side lean.
Stepped/tiered faces operate the compression sides independently in front of hinge
>>just as the Tapered Hinge does in rear of hinge
>>so both can help against side lean.
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i have gotten fair 90 from hard forward in what i think of as Swing Dutchman(terms vary)
>>whereby usually maintain a patch of anti spin on side compression side
>>but not now>>want spin>> remove anti spin patch on lean side, leaving shorter triangle
>>slam hard confident into the facing for more of that speed squared response back
>>as rubber ball against wall>>greater input speed gives greater response back
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i look at serving into direction of CoG as lending to it's greatest pull direction
>>for greatest ground concussion as a variable 'spice'
>>then any to the side is less of that spice sprinkled in.
So felling some to side practices technique, and saves ground concussion
>> Doc Shigo showed a hard rain could pummel the magic microbes in the sea of soil.
>>would think heavy equipments and impacts as much worserer.
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All this supposes a single faultless monolith/not interior fault lines existing nor created in spar
>>i think of BC as a binding against the forward motion that itself will not yield
>>giving split decision of "should i stay or should i go"(appropriately done by 'The Clash')
>>as internal structure of spar is compromised and have 2 moving 'plates' that can bind against each other
>>not be a single moving 'monolith' of 1 concern; but now multiple perhaps combatting parts.
And the massive forces of like 2 bad azzes that never been beat internally overcomes the constitution of the spar to BC
>>especially screams evident to me in pix with the rear portion pitching toward horizontal
>>as forward tree portion stands more tall
>>giving as a classic, olds-cool leaned back ready fer shave BC "T" i think
Logger friend back east sent me this after he gave it a whirl. 
