Buffeting is best described as the beating or irregular shaking of an aerodynamic surface caused by which condition?

• A. Unsteady flow or gusts
• B. Steady laminar flow
• C. Aerodynamic flutter
• D. Vibration from mechanical components

Answer: (A)

Buffeting happens when the airflow over a surface becomes unsteady, such as in gusts or turbulent flow, causing rapid, irregular pressure fluctuations that beat against the surface and make it shake. When the wing or other surface encounters these disturbed flows, the changing pressures produce uneven forces that feel like pounding or jolts rather than a smooth breeze. If the flow were steady and laminar, these fluctuating forces wouldn’t occur, so buffeting wouldn’t happen. Aerodynamic flutter involves a different problem—a dynamic instability where the structure and the airflow interact to produce self-excited oscillations that can grow with speed. Vibration from mechanical components is not about the airflow-induced forces on the surface. So the best description is unsteady flow or gusts causing irregular pressure and shaking.