The helicopter hangs a long cable way down to a chainsaw type rig. This guy hovers, slowly lowers, and maneuvers to trim what he's after. It would take a set to do this job. Pretty amazing.......
Around the 5 minute mark it shows the saw at work.......
https://www.youtube.com/watch?v=KpwZ6c6ykNk
Around the 5 minute mark it shows the saw at work.......
https://www.youtube.com/watch?v=KpwZ6c6ykNk