What phenomenon is associated with sweptback wings?

Sweptback wings are mainly associated with the phenomenon of Dutch roll, which is a type of oscillatory motion that can occur in aircraft during flight. This phenomenon arises primarily due to the interaction of yaw and roll motions, which can cause a yawing motion that induces a rolling response and vice versa.

Sweptback wings are designed to delay the onset of shock waves at higher speeds and improve stability. However, this aerodynamic feature can lead to characteristics where lateral stability and control must be managed carefully. The effective aerodynamic center moves rearward, affecting the aircraft's yaw stability. If the aircraft enters a yaw, the swept wings generate lateral forces that result in a rolling motion, which can perpetuate oscillations in yaw and roll – this is what defines Dutch roll.

In contrast, the other options do not relate specifically to the characteristics of sweptback wings in the same manner. Deep stall is more related to specific airfoil designs and occurs when an aircraft reaches an angle of attack beyond the critical point, resulting in a loss of control. Wingtip stall refers to a specific condition where the wing stalls at the tips before the root, which can occur with straight wings rather than swept designs. Vortex shedding is a phenomenon related to unsteady flow around