What happens if fabric is not adequately tensioned?

When fabric is not adequately tensioned during the covering process, the primary consequence is that it can lead to sagging. Proper tensioning of the fabric is crucial for maintaining the shape and aerodynamic properties of the aircraft. If the fabric is loose, it may sag between support ribs, which not only affects the visual appearance but also compromises the overall structural integrity. This sagging can create areas where wind resistance increases, potentially leading to increased drag during flight and affecting performance negatively.

Furthermore, sagging fabric can lead to areas prone to moisture accumulation, which may foster deterioration of both the fabric and the underlying structure over time. Proper tensioning helps ensure that the fabric remains taut, preventing sagging and contributing to the longevity and functionality of the covering system.