How well I remember getting into my first big hardwood tree prune. Making a beeline for the optimum tie in point, tying in, making my way down, then wondering which branches to prune off, which branches to leave? So of course I just copied what the top dog pruners did, cut every branch off except a few well spaced sets of three, usually the innermost healthy branches, reduction pruning, commercial buzz jobs. No chin scratching or wondering what the end result looks like, or how vigorously that tree will react to such hard pruning in terms of sucker growth.
Chainsaw pruning, production pruning, both climbers and bucket flyers, city street tree contracts, county road clearance contracts, military housing community contracts, buzz em all with a chainsaw.
Bucket trucks have improved, gotten taller, remote narrow access manlifts have improved as well, more versatile, better reach.
But none of them, whether articulating or telescoping, are capable of pruning a truly large spreading decurrent tree, without multiple repositioning and setup of their lifts.
Now I have been fortunate enough to spend many years performing tree removals for a large tree company with their own in house crane, removing many thousands of trees with crane assistance. Essentially spoiling me rotten floating around, getting where I wanted in the trees by pointing to whichever spot or crotch I desired.
It was inevitable that I'd take advantage of my crane availability to prune a few trees as well, despite the bloody 150 lb crane ball n hook!
Leading me to imagine hanging from a swiveling hook assembly without a friggin ball, maybe even a T bar with two points of attachment?
So a crane truck, built specifically to hoist personnel only, with a long reach jib, would be capable of pruning even the largest hardwood trees from one single position. Reach over houses etc. it would never see loads exceeding 1000 Lbs.
Then of course these advantages being insufficient to satisfy a spoiled rotten climber like me, I decide hanging from a wire rope sucks too! Conducts electricity, weighs too much, and can't power my tools etc, wah wah wah.
Nope I want a synthetic compound hose assembly, that swivels, and delivers everything a spoiled rotten brat could dream up. Compressed air, cold air, hot air, filtered and oxygen enriched breathing air!
I wanted it all, and I wanted it then, twenty years ago.
Who'll succeed where I failed, the Germans, Swiss, Japanese, English.
I'm fairly certain it won't be America leading the way.
Forty years from now? Climbers won't need to leave home to perform their jobs in the trees. They'll just get into harness in a control room across the hall, and log on in real time!
Ideally a tree pruning anthropoidal robot need not weigh much over 100 lbs, particularly if powered by an overhead umbilical.
Jomoco