The End of Tail Rotors

The tail rotor is a necessary evil of helicopters. It's necessary because it provides the counter-torque that steers the craft. But the evil comes in when it clips fences, electric wires, or people. It also makes a lot of noise. Bell is "actively researching" new anti-torque systems that are embedded in the tail boom. Ask them what those technologies are, though, and they clam up quickly.