Spaceships: Class Analogues
Tech level fourteen with the introduction of bonded superdense material for both hull and armour could be the equivalent of the dreadnought era.
True, the dreadnought itself is the sum of then current technology, used in a more efficient way, but this seems primarily more of a question of giving and absorbing damage, and with a fifty percent jump in armour effectiveness, probably more a vital feature in the make up of these large warships.
As such, I tend to view medium and large warships having the following armour features:
Battleship - twelve percent of hull allocated to armour.
Heavy cruiser - ten percent of hull allocated to armour.
Light cruiser - five percent of hull allocated to armour.
More or less.
In history, ship general classes were defined by treaty, in order that numbers could be regulated, though certain features would be similar throughout.
For primary armament, a spinal mount taking up about five percent of the hull volume.
Range should be factor four, while acceleration should easily reach factor six.
A previous generation of warships would be more compromised in it's prioritizing of engineering, armour and fire power.
Armour and hull would be using now standard crystaliron, first available at tech level ten. This would allow warships to have an armour that would be twice as effective as titanium steel.
Initial construction if warships probably still used titanium steel as the frame to hang on crystaliron armour plates, hence the description of ironclad
The largest warships were termed armoured frigates, and could easily accommodate upto fifteen percent of the hull volume being taken up by armour.
Tech level eleven brought a revolution in jump technology, and the size of ships, allowing the manufacture of upto fifty thousand tonne behemoths, the largest of which were called battleships, since they could stand in the line of battle, heavily armed and armoured.
The greater range in tonnage also made necessary a finer distinction between the newly designed warships, so that their collective roles could be more easily identified.
Ships below battleship size, but above small combatants, were labelled cruisers, and sub-divided into the following basic categories:
Unprotected cruiser - bulkheaded.
Scout cruiser - five percent of hull allocated to armour.
Protected cruiser - five percent of hull allocated to armour.
Armoured cruiser - ten percent of hull allocated to armour.
Tech level twelve brought with it access to jump factor three technology and hundred thousand tonne ship construction.
Tech level thirteen was a transitional period, as shipyards could now build ships as large as they had the capacity and the budget allocation, compromises that were made in previous designs of line of battle ships could now be ignored, in terms of mobility, protection and armament, though understandably not in actual financial costs.
Medium sized ships were defined as being between twenty and a hundred thousand tonnes, with some armoured cruisers built to the upper limits of that tonnage, though various doctrines were tried out, with cruisers being built to satisfy wildly differing naval doctrines and feature optimizations.