What can contribute to a partial or complete collapse of a PPC wing?

A high angle of attack combined with a lack of pressure is a significant factor that can lead to a partial or complete collapse of a PPC wing. When the angle of attack exceeds the critical angle, airflow can separate from the upper surface of the wing, causing a stall. In the context of a PPC, if the wing is not maintaining sufficient pressure (either due to under-inflation or an improper angle of attack), the wing can experience a loss of lift and subsequently collapse. This is particularly critical during maneuvers that require significant bank angles or in turbulent air, where the wing may be subjected to varied aerodynamic forces.

In contrast, flying at a low altitude does not directly relate to wing collapses; it’s more about the safe operation regarding obstacles and recovery options. Heavy payloads, while they can influence performance and handling, do not inherently lead to a wing collapse unless they create conditions that contribute to exceeding the wing's limitations. Flying in calm weather conditions is generally favorable, as it reduces the chances of turbulence that could disrupt the airflow over the wing. Thus, the correct understanding of wing behavior can prevent dangerous situations that would lead to a collapse.