A fuel cell includes a flexible body and first and second fittings attached to the flexible body. The first and second fittings each include a first opening configured for ingress or egress of a fluid, and each include second openings extending through out...

A fuel cell for containing fuel for an aircraft has a side wall including an innermost layer configured to contact the fuel and an outermost layer. A containment gel patch is coupled to the side wall of the fuel cell. The containment gel patch is formed fr...