Some Finnish people have built a drone-mounted chainsaw and one can ask what could possibly go wrong? It reminds somehow of the Mantrid Drones if anyone recall those. The drone is capable of sawing fir branches and icicles. So it can actually be of use.
Youtube Clip of the #killerdrone.
(Score: 0) by Anonymous Coward on Thursday April 21 2016, @06:59PM
Seems to me that your branch would come down more safely as chips (not 6"/150mm "logs") -- time for the drone mounted wood chipper. My new invention starts at the end of the branch and grinds toward the trunk of the tree until the user (hopefully) stops it.
Once it's done, the user can sweep up the chips for mulch around the base of the tree...