Which term describes the time-dependent behavior of the aircraft after disturbance?

Which term describes the time-dependent behavior of the aircraft after disturbance?

• A. Static stability
• B. Dynamic stability
• C. Positive static stability
• D. Neutral static stability

Answer: (B)

Time-dependent behavior after a disturbance is described by dynamic stability. After a perturbation, the aircraft’s motion in pitch, roll, and yaw evolves over time. Dynamic stability asks whether those motions damp out, persist, or grow as time passes. If they die away, the aircraft is dynamically stable; if they continue at the same amplitude, it’s neutrally dynamically stable; if they grow, it’s dynamically unstable. Static stability, by contrast, concerns the immediate tendency right after the disturbance to return toward or depart from the original state, not how the motion changes over time. So the term that best captures the time-dependent response is dynamic stability.

Time-dependent behavior after a disturbance is described by dynamic stability. After a perturbation, the aircraft’s motion in pitch, roll, and yaw evolves over time. Dynamic stability asks whether those motions damp out, persist, or grow as time passes. If they die away, the aircraft is dynamically stable; if they continue at the same amplitude, it’s neutrally dynamically stable; if they grow, it’s dynamically unstable. Static stability, by contrast, concerns the immediate tendency right after the disturbance to return toward or depart from the original state, not how the motion changes over time. So the term that best captures the time-dependent response is dynamic stability.