What is used to reinforce protrusions in fabric covering?

Gussets are specifically designed to reinforce protrusions in fabric covering. When the shape of the aircraft or the areas needing coverage have angles or curves, gussets are used to provide additional strength and support. They act as triangular or quadrilateral pieces of fabric that are sewn into the fabric structure, helping to prevent stress concentrations and potential failures at these junctions. This is particularly important in high-stress areas where the covering might otherwise be prone to tearing or fraying.

In contrast, stabilizers are mainly used to enhance stability rather than to reinforce protrusions. Patches are often used to repair or cover damaged areas, but they do not specifically address the structural reinforcement needed for protruding shapes. Straps can provide additional holding or securing capabilities but do not serve the same structural purpose as gussets. Thus, gussets are the appropriate choice for reinforcing such areas in aircraft fabric covering.