Final answer:
Collective/Airspeed to Yaw, or Electronic Coupling, is an automated flight control system in helicopters that coordinates collective pitch and tail rotor inputs to maintain stability and control yaw, particularly during airspeed changes.
Step-by-step explanation:
Collective/Airspeed to Yaw (also known as Electronic Coupling) is a flight control system used in helicopters. This system automatically coordinates the collective pitch and tail rotor inputs to maintain directional control and manage the helicopter's yaw during changes in airspeed. Essentially, it is a form of autopilot that assists the pilot in keeping the helicopter stable, especially during critical phases of flight like takeoff and landing. The system monitors airspeed changes and adjusts the yaw by coordinating pitch changes in the tail rotor blades, which helps balance the torque produced by the main rotor. Such electronic coupling systems enhance the safety and handling characteristics of helicopters.