How do you cut a slanted bore in small heavy leaner?

[Eric H-L]

In another post Stig blew my little beginner mind with this quote:
"You can ALWAYS borecut.
If the tree is small, bore in vertically or 45 degree.
That'll allow boring on trees less than a bar width in diameter. "
I had some curiosity although I am not experienced enough to try anything in a risky situation. When boring in a tree too small, do you slant the bore upward from the hinge or downward? Does it change in different situations? Do you cut the strap from inside the bore? Or do you pull the saw out and nip it from the back?

 

[lxskllr]

Glad you asked. I was pondering that myself.

edit:
I was especially wondering about the vertical bore. Seems like that would tend to setup a barberchair.

 

[SeanKroll]

It shouldn't matter in regards to barberchairing, that I can see. If you had a narrower bar, horizontally, you'd also be removing a segment of continuous wood fiber.

 

[lxskllr]

My thinking is a vertical bar is starting the split. You put a shallow face in, do a vertical bore behind it, then when you start your backcut, it seems to me the tree would be encouraged to split when you hit the vertical bore. Am I thinking wrong?

 

[stig]

Yes.
If it is small enough that you need a vertical bore, tripping from the outside will be so fast, it has no time to react.
It works fine aloft, to.
Leaning tops in split prone species can be tamed fast and easy this way.
Unlike a Coos bay cut you only need access to one side.

 

[stig]

Top picture is how I do it.

 

[Bermy]

Cool! Learned something new today.
Thanks for asking the question, and thanks for the answer.