I've wondered about trying something with trees that are prone to break.
What if the tree is cut very low at ground level? From splitting firewood, I've realized that the grain pattern just above the roots is usually strong as heck. On some species, it's almost impossible to split the lowest foot or so of a tree, even with a hydraulic splitter. I assume (and you know what they say about assuming) that the odds of breakage during a fell should be minimized with a ground-level cut.
Also, I assume (again) that there should be less shock to the cut/hinge if the tree gets supported by the ground as it hits the ground at the end of the fall. When the height of the cut is a few feet higher, the tree trunk has zero support at the cut and should be more likely to break-off at the cut. It's usually the shock of the impact of the tree hitting the ground that breaks the hinge. If the hinge can stay intact until the entire length of the trunk contacts the ground, there should be less shock to the hinge, and that depends on the terrain (ground humps, etc). Couple that with the fact that the low-to-the-ground grain is stronger (is it?), I assume (there I go again) we would have less breakage of trees of any size with low cuts.
This sounds logical to me, but I'm not a professional tree feller and I have not experimented with it. Any opinions on it?
The down side (if it works) is that a tree would not have that high hinge that we tend to like. But if it stays alive, we can then hinge any manageable re-growth in a couple years.
BE SAFE!