These are some concepts for airships.
All four designs are using the 'zeppelin' concept, the hull of the ship hanging from a hug sack full or hot air. Propellers provide the momentum to move around and the fins help with stability and steering.

One of these ship designs will be for Bahamut and his crew, I'm thinking the third one (lower left) is the best for him.
All it needs now is a ship name, I'm thinking of either 'Arvanche' or 'Last Dancer'.

If you have any input or suggestions, feel free to mention them.
I put them under 'sci-fi', given that they're airships and the concepts for the airships are based on scientific reason and research.


Inked linework on a Photoshop background.

Concepts and art are mine.