Abstract: A pressure vessel is provided that has a structural shell formed by winding filaments upon a substantially cylindrical form. The structural shell has a first filament and a second filament. The first filament includes of a first material. The first filament is wound about the form in a primarily hoop direction. The second filament includes a second material. The second material is different from the first material. The second filament is wound about the form in a primarily helical direction. The first filament and second filament are interwoven in a layer upon the form.

Abstract: A fuel system is provided that includes a mounting block assembly configured to support an end of a fuel tank. The end of the fuel tank has a boss. The mounting block assembly encloses a space configured to receive the boss of the fuel tank. The fuel system also includes a bearing disposed in the space. The bearing has a support surface configured for sliding support of the boss of the fuel tank at an interface between the first portion and the second portion of the mounting block assembly. The fuel system also includes a sleeve. The sleeve is removably coupled to the boss of the fuel tank such that the sleeve is restrained longitudinally relative to the boss. The sleeve is configured to slide longitudinally relative to the support surface when the boss and sleeve are disposed on the support surface within the space of the mounting block assembly.