The small wooden cruiser USS Hartford

The USS Hartford was about a 2550 ton wooden cruiser. SHe had a single screw which could propel the Hartford at up to 9-1/2 knots. She was originally armed with 20-9in MLSB guns, augmented by 2-20pdr Parrott guns and 2-12pdr guns. She served as David Farragut's flagship from January 1862. Her most notable actions were the Battle of New Orleans and the Battle of Mobile Bay.

A really great picture of HMS Viper at speed

This is a picture that is derived from that on Wikipedia, but is cleaned up considerably. The picture is so useful, because you could make an accurate outboard profile drawing use it.