What is a "tension tape" used for in the fabric covering process?

Tension tape is specifically used in the fabric covering process to maintain proper tension at the seams. This tension is crucial because it ensures that the fabric is applied tightly over the airframe, which prevents sagging and contributes to the overall aerodynamic efficiency of the aircraft. Without appropriate tension, seams can become weak, potentially leading to fabric failure under stress or during flight. Tension tapes help to distribute forces evenly and keep the covered fabric securely in place, enhancing the durability and safety of the aircraft's covering.

While other options such as adding color, repairing damage, or enhancing water resistance are relevant to fabric covering, they pertain to different aspects of the process and do not address the primary function of tension tape in maintaining structural integrity at seams.