ropensaddle
Feel Lucky
The problem with what Murph did was:
1- shallow notch
2- poor communication
3- stopped back cut to soon
4- created excuses after the fact for a poorly done job
your undermining theory is only good in a perfect setting & gives only a limited definition...the Notch originally was used as a means for directional guiding as it was thought that where the notch is...is the direction the tree will fall, however that theory holds truth but we all know it is somewhat flawed. the 1/3rd rule is just a basic guideline & when mathematics is put into the mix thats where they get the notch depth, back cut height & hinge wood.
the back cut height was established to prevent the butt from coming back at you......the hinge is determined by notch depth, circum & most importantly the "holding wood"..........therefore giving these factors a specific definition/reason cant truly be given....thats why I asked what publication to cite cause every one has different reasonings for the same outcome!!!
Murphs so called special cut "bore cut" was originally used by loggers for the purpose of keeping the butt tear to a minimum & reduce checking at least was the thought...........Murphs uses of this cut is a twisted portrayal of a snap cut & with enough pull force the spar will go but it is not a directional felling notch & can go bad real quick....not a technique to use nor promote as an instructional act!!
LXT...............
I agree mostly but i would rather see someone stop back cut and saw a little more than to rip through the hinge like I have seen some do! I feel ole murph needs to get a job cutting timber he seems to like it more than doing tree work.