For this one? The basic balloon design was inspired by an anime called the Daughter of Twenty Faces. Having two balloons with the ship between them allows you to have a deck open to the sky. Beyond that, I was using a layout along the lines of a traditional sailing ship, with room for hammocks in the main hull. This was also the first airship I built, and it was designed before pistons, beds, and hatches. I went back through and added these elements later where needed, but the design was not based around them like some of the later ships.