anti-torque

The helicopter is probably the first French example to have tail anti-torque rotors.

"Circulation-controlled anti-torque or circulation controlled directional control systems"; 3.

It propelled the aircraft and had a long-span wing for lift and anti-torque.

This flight included hovering, pedal turns, and slow forward and sideways flight using the VTDP for anti-torque, directional and trim control.

"Circulation-controlled anti-torque or circulation-controlled direction control systems" Control systems using air blown over aerodynamic surfaces to increase or control the forces generated by the surfaces.

Some helicopters use other anti-torque controls instead of the tail rotor, such as the ducted fan (called Fenestron or FANTAIL) and NOTAR.

The rotor of a gyrodyne is normally driven by its engine for takeoff and landing-hovering like a helicopter-with anti-torque and propulsion for forward flight provided by one or more propellers mounted on short or stub wings.

Initial examination revealed that the anti-torque links central pivot bolt was missing, although it was not determined whether this had been a consequence of, or had precipitated, the shimmy.