The number of personnel engaged in a helicopter operation will.

Dec 25, Helicopter to trim trees? Check out this segment on a contractor, unreachable power lines from the most unlikely of shrubremover.bar if you need to see the right m. Jun 13, This Foot Buzz Saw Hangs From a Helicopter To Trim Trees From the Sky. Inthe inadvertent brush of a tree branch against power transmission lines. Sep 20, A viral video of an “air saw” suspended from a helicopter has left Twitter users’ heads spinning.

The blade saws were first introduced in the s to clear limbs in difficult-to-reach Author: Jennifer Leman. Jun 05, The saw cuts tree limbs 8 to 10 inches in diameter. The limbs fall straight to the ground propelled by air from the helicopter rotors.

Ground crews move limbs. Sep 28, Using a helicopter carrying a dangling bar with ten spinning saws, he has been winding his way from Vermont's southeast to northwest corners- carefully cutting back tree limbs along the rail.