I have seen that before. Kind of unwieldy and
expensive for trimming things under 8-10'. The bucket can reach that high by itself. IIRC, the Limbinator goes for around $2000.
What I'd really like is something with a 3-4' bar. Not to cut anything that big, but to go trough brush and briars.
I suspect Rube Goldberg was around when that was invented, LOL. I didn't seen how it was controlled (or maybe it isn't :confused2
.
It did give me an idea though, I have an old electric chain saw. Maybe I could bolt it on to the bucket and control it with a switch. Maybe I can power it with an inverter or bring along the Honda generator!
Of course the best way for clearing the sides of a trail would be a helicopter. Last year I saw them clearing limbs on a power line right of way. They had a 40' pole hanging down with a dozen 2' circular saw blades spinning on it. I wouldn't have believed it if I hadn't seen it with my own eyes. There are videos on youtube.
What does work well for lower stuff is a batwing mower with the sides up at an angle. That clears the lower 4-5 feet pretty well. You just need a trail big enough for the rig....and of course the batwing and a tractor big enough to operate it (80 HP or more). It does a really nice job with the wings at 45 degrees.
Ken