I've tried to come up with stats for some of the ships we've seen so far on Enterprise, such as Klingon, Vulcan or Andorian ships. I haven't got around doing the Suliban but they're next on the list.
Now, I must admit I haven't seen most of the episodes those ships appeared in (I'm trying to catch up) I used the info found at the Ex Astris site. So there may very well be some mistakes here and there.
I've decided to keep the background info to a minimum due to my limited knoweldge (so far) but instead I'll insert a few design notes.
Ok before I start here's my take on the Klingon fleet circa 2150:
The D-7 is as 'stated' in Starship. The D-7 is the newest, most advanced warship of its era. There are very few in existence: 3 have been commissioned while 2 other ones are being built. By Ent-era standards it is a monster- like the JH battleship is by TNG's standards. They act as the Klingon fleet's standard command ships.
The standard Klingon heavy ship is the D-5 cruiser. It is overall more advanced than the Human's NX-01 class and comparable to the Vulcan's Combat Cruiser. There is also the 'transport' versoin of the D-5 with lesser combat capabilities but optimized for carrying troops and war supplies.
Then the newest Klingon standard light ship is the D-3 (Raptor). It is used a light attack craft, a scout or an escort. I've modified the version found in Starship; I assume that the Starship version is the lastest upgraded version found in the 2200's.
The D-2 is the earliest version of the Klingon Bird-of-Prey and it is a somewhat older ship which has been supplented by the Raptor.
I'm puzzled as to why a race narrowly focused on battle like the Klingons have apparently the same tech level as the Vulcans... my theory is that the 'TOS Klingons' that we don't see (and most likely will never see again) are the 'brains' within the empire and they're the ones coming up with those advanced designs.
OPTIONAL RULE: I had a bit of a problem when doing the Klingon ships- on one hand they are supposed to be more powerful than Human ships but on the other hand the range of values in the CODA system is limited. So I came up with this little optional rule:
whenever Klingon ships fire on Human ships, and a succesful hit occurs, there is the chance that the Klingon weapon does +1 extra penetration. To determine if this happens, the Klingon Tactical officer rolls for to-hit again with all of the applicable modifiers in effect; if the roll is succesful then the shot does +1 penetration damage to the Earth ship. This may not be used against Vulcan or Andorian ships, as their shield technology has been adapted to Klingon weapons' fire.
So here's the D-5 cruiser:
D-5 Cruiser
PRODUCTION DATA
Origin: Klingon Empire
Class and type: D-5-Class Cruiser [armed tanker version]
Year launched: 2150
Very nice. With regards to the Klingons, I suspect that the Klingons just had a head start on the Federation, and they just have larger numbers of ship producing facilities. It is possible that the smooth heads were one of the planets conquored by the Klingons, who had advanced technology and a reasonable fighting ability, so they were draughted in to their forces. Klingon ships have always been quite large and very heavy, or small and nimble, but all of these strategies have been war specialisations. Their weapons are not very sophisticated, but they do shunt out alot of power, however general technology wise they seem to lag behind the Federation somewhat once the Federation get going. The Klingons seem to design by bulk, the federation by refinement and flexibility.. which is fine - yes the old consitution probably outmatched a klingon ship - but then the Klingons might send 3 ships (much like the Cardassian technique!)!
The drive is the latest in Romulan warp technology and is a refinement over the standard 'magnetic bottle' principle. The ship is fitted with warp drives but they can only be used twice before being recharged at a base. Each time it is used the ship can travel at a maximum of warp 4 (OCU). When the 2 charges have been depleted then the ship can no longer go to warp. The system is vulnerable to enemy fire- whenever 'propulsion' is hit and IF THERE is still a charge left, a D6 must be rolled- the result equals the # of damage points the structure suffers.
Note:
The Bird-of-Prey is fitted with a cloaking device that makes the ship invisible to the naked eye and makes it difficult to detect by sensors. It is however a very crude device, even compared to TOS standards. Even a Starfleet shuttlecraft from the TOS era could easily detect it with its sensors.