We had those machines on Vancouver Island. They were called Harvesters. Maximum 3’ diameter tree on fairly level ground.Processer is some machine. I cut trees in winter with chain saw ccasionally ,it was hard graft for not a lot of money to be honest.
They could cut and drop a tree quickly, then de-limb it, cut it to length, then stack it. They would usually be used in second growth areas.
But occasionally, an operator would think they could cut a larger tree. (5’+)
The circular blade would not be large enough. That’s where I would come in.
A 5’ to 18’ diameter tree is/was no problem for me …but these were very dangerous. I could only lecture the operator after I safely felled the tree. A tree that size could easily crush his machine.…when you bite off more than you can chew.











