The Voyager class was a low cost refit of the final 20 Vindicator class Frigates, using the same concept as the Constitution class based Endeavour class. The Vickers SCNN self contained Linear Warp drives offered a way to update relatively new hulls in a more affordable way, which was also far quicker than the full scale rebuild option.
The Voyager class served loyally for 30 years, latterly in second line duties. Although deemed old fashioned by some they performed valuable work, and were surprisingly sought after postings as they retained the older style internal and external aesthetic and use of space until their eventual retirement.
Based on Vindicator from Jackills Starship Data Sheet and Endeavour from Ships of the Starlet Vol 1
The Vindicator class of 2261 was a development of the Anton/Miranda Class Cruiser and Surya/Coventry Class Frigate platform. A more compact looking vessel than its earlier forebears the Vindicator mounted its warp drives closer to the primary hull on much more substantial mounts. This modification of the design was based upon after action feedback from various vessels of the family that had been engaged in the Four years war.
The Vindicator class was the last twin engine version of this basic design platform produced before the adoption of the Linear Warp Drive (the later Durrett prototype being single engined).
Like many of the other ships of this overall design family, many of the Vindicator class ships were extensively rebuilt to form part of the refitted Miranda class in the 2270s and 2280s. However, the 20 newest ships of the class were rebuilt much like the Endeavour refit of the Constitution class with Vickers SCNN Linear Warp Nacelles to form the Voyager Class which continued in service until the early 2300s.