Back Cut

[kowens]

i have never used a angeled back cut (A) i have seen it used
and i crenge is thear a reason for this cut?

 

[TheTreeSpyder]

i think it is done as a safety against setback on BackCut; but only psycholigically; and has quite a twist as being mechanichally unsound.

If you are that unsure about the tree setting back, then plan is bad. i think slanted BackCut changes the angle of the resistance against setback, but doesn't change the degree of movement to do sitback (so is just psyho-logical solution and not mechanically positive. Also any help push by wedge (in this time of doubt that you reach for angled BackCut)is set at bad angle; compounding both of these things against maximized output force for efforts .

i think this one simple thing changes the mechanichs so quickly that it is illustrative of doing things simply, straightly, mechancically positive; and to do that with no more sweat, just habitual observation and pro-cedural (term from Dent's "Professional Timber Falling; a Procedural Approach"; a book of empoermeant and theinherent responsibility in being the craftsmen to make great changes with subtle changes when at bat; IMLHO) you have to be technician, carving craftsman,engineer, inspector all at once.

i think the angle change weakens the resistance against the setback it trys to defend against in the first place. i think if wedge is employed to push forward, it takes more force because of less arched leveraging(trying to move spar forward faster, not more powerfully part of arc), and this increased force needed to do same job, has to depend on the weakened 'backstop'/anchor of the bottom of the BackCut that is angled, so resistance force is not maximized by not coming fromg the 'columnar support' straight down the 'axis' of the spar.

A good illustrative on how one simple change that looks right, actually mechanically introduces 2 components/alterations into the formulae that can compound against ya at once; just from not doing the same amount of cuts/time in the simply, best mechanically simple strategy. i think this is made worse by people using this strategy habitually or when they are sweating about weakness of plan/fall; and employ a weaker strategy at that particular time!

i'd heard the slant was bad for the way it came thru the fiber, never understood that, but this is more my 'mechanics view' of what i see weak in it..

AS Thread on : Mr. Harry H. Omer presents "Slanted BackCutz"

"How do i enlarge attatchments to be able to see/read them" - for newbies (new buddies)

You should pull up a stool and post more IMLHO, welcome aboard!

Pic from HH's T'read:

 

[murphy4trees]

Good piece there Spidy..
I don't like the anled back cut, primarily, because it offers no benefit, that I can see and it leaves plenty of room for an error in judgment that could end up fininshing the backcut above or below the intended hinge...

 

[John Paul Sanborn]

It is too easy to cut out the hinge, and there is a small chance of the back blowing out, as described in the linked tread.

 

[ROLLACOSTA]

this method is called a dogs tooth cut..it is used when a tree has a severe lean going the way you want the tree too fall..an ordinary falling cut may tear quickly before your ready..what you do is make your mouth as usual then bore into the tree leaving a hinge and also 4 or so inches on the back then you cut through at an angle as pictured bang over she goes

 

[ROLLACOSTA]

looking at the pic again god knows what that is....but my last post is the best way too fell a heavy leaning tree

 

[kowens]

thanks

thank you treespyder i knew yuo would come threw
i just figured if we were discussing top or bottem cut ?
what else is left?

 

[TheTreeSpyder]

Ummmm shape of hinge in between the 3 setup cuts of face and back cuts, stepped face interuptions, load forward or across on hinge in final cutting, turning all theories etc. sideways from felling to test to see if consistant in rigging etc.?

Stihlllllllll lots of fun left!