Which term describes the aircraft's ability to respond to control inputs and control the flight path and attitude?

• A. Maneuverability
• B. Controllability
• C. Stability
• D. Responsiveness

Answer: (B)

Controllability is about how well the aircraft translates pilot inputs into controlled changes in flight path and attitude. It covers how effectively the control surfaces and the flight-control system produce the commanded roll, pitch, and yaw, and how quickly and predictably the airplane follows those commands. A well-controllable aircraft responds promptly and predictably to stick inputs, allowing the pilot to steer and set the flight path as intended. This differs from stability, which is about the aircraft’s tendency to stay in trim or return to it after a disturbance; an aircraft can be stable yet difficult to control if the controls are weak or nonresponsive. It also differs from maneuverability, which is the overall ease of performing maneuvers; controllability is the ability to achieve those maneuvers cleanly through effective response to inputs. In short, controllability best describes the aircraft’s capacity to respond to control inputs and manage flight path and attitude.