What is the term used to describe a helicopter's tendency to drift due to tail rotor thrust during a hover?

The term "translating tendency" effectively describes the phenomenon where a helicopter drifts laterally during a hover due to the asymmetrical thrust produced by the tail rotor. In helicopters, the tail rotor generates thrust to counteract the torque produced by the main rotor. This imbalance can lead to a tendency for the helicopter to move sideways, typically to the right in many configurations, as the pilot must apply cyclic input to maintain a stable position.

Understanding this concept is crucial for helicopter pilots, as it emphasizes the need for constant adjustment and control inputs to ensure that the aircraft remains stationary during takeoff or landing in a hover. Recognizing and compensating for translating tendency allows for safer and more precise maneuvering in critical flight situations.