Excelsior 4-nacelled
Nothing is known about this starship class whose construction seems to date back to the beginning of the 24th century or earlier.

This is one of three or four study models for the Excelsior, built in the course of the pre-production of "Star Trek III".  The model briefly appeared on screen in TNG: "Best of Both Worlds".  The real starshyip probably isn't related to the Excelsior-class.  IT is named "Excelsior study" in this list only due to the lack of a proper name.

The model has a Constitution refit type saucer and four nacelles which are connected by what looks like an extendable neck.  Sicne this would make no sense technically, it is a better suggestion that, unlike it was the original intention, this is a cargo ship, and containers can be mounted to the underside of the connecting spine.