What does the term "wet wing" refer to?

The term "wet wing" specifically refers to a wing design in which the structure of the wing itself is utilized as a fuel tank. This involves sealing portions of the wing's internal structure to contain fuel, allowing for significant weight savings and increased aerodynamic efficiency compared to traditional external fuel tanks. The fuel is stored in special compartments that are incorporated into the wing's design, eliminating the need for additional fuel containers.

This design is commonly used in many commercial and military aircraft, as it maximizes the use of space and minimizes drag. It enhances the overall performance of the aircraft and allows for a more streamlined shape. Understanding the wet wing concept is essential for comprehending not only how fuel systems work in aviation but also how aircraft performance is optimized through efficient design.