Before the Akira was designed, before NX-01 "ripped off" the Akira design, someone from the FASA game makers decided a "catamaran" style hull was very original and interesting for starship design. One of the miniatures available was the Loknar class starship, which was esentially the saucer and engines of the Constitution class with an odd twin-hull design. Phobos is an adaptation of the Loknar class, what it would look like if it had been canon, and had been deemed fit for refit at around the same time as the Constitution class was. She's already available on my website in the Star Trek section. It only took a night to design the catamarans and replace the registries on the parts from the Enterprise.