Ha'apax class

The  Ha'apax-class  advanced warbird was a class of starship used by the Romulan Republic in the early 25th century.

History
Using information gathered from an abortive attempt to steal the USS Prometheus (NX-59650), a powerful Federation escort, the Romulan Star Empire worked to design a warbird that could use the advanced vector separation technology of the Starfleet vessel. Their final product was the Ha'apax-class warbird and its Haakona variant, although neither was ever put into service by the Empire.

However, early in the 25th century, some Romulan and Reman engineers began to construct warbirds of the class in secret. By 2409, a few could be seen in operation, such as the, flagship of the Romulan flotilla that would become the Romulan Republican Navy.

The Ha'apax-class and its variants would go on to see action against the Tal Shiar, Undine, Elachi, Voth, Vaadwaur, Heralds, and Iconians. It would serve admirably in all those conflicts and continued to serve as a mainstay of the Republican Navy well into the 25th century.

Technical information
The Ha'apax-class represented a notable design departure from traditional Romulan starship designs of the 23rd and 24th centuries. The warbird's main hull was much bulkier and more solid than preceding classes, with no open spaces like with the D'deridex-class, due to the design focusing on the implementation of vector separation.

Vector separation
Based on the multi-vector assault mode of the USS Prometheus, the vector separation of the Ha'apax-class allowed for the warbird to divide into the upper Ha'nom and lower Ha'feh vectors. This separation allowed for great variability in combat. The two vectors were developed to be completely self-contained and independent. As such, the two vectors were often addressed as separate classes of warbird and were often seen operating independently of each other.

Haakona
The Haakona variant varied in a number of ways from the standard Ha'apax. The overall design was more ridged and segmented. The warbird's upper vector wings swept upwards, while the wings of the lower vector swept downwards, emphasizing the two different parts of the ship much more prominently.

Kara
The Kara variant shared many of the design features introduced with the Haakona subclass, but still had some minor differences. The most notable of which was the lance emitter on the nose of the warbird, which allowed for the use of the class's integrated phaser spinal lance. Also, unlike the standard Ha'apax or the Haakona variant, the Kara was designed with a larger hangar bay capable of carrying numerous fighters. Although some warbirds of the other two variants were also refit with larger hangar bays.

Ships commissioned

 * (Haakona-class)
 * (Haakona-class)
 * (Haakona-class)