So, I think I'm getting the hang of working with low tech stuff, but I've also been playing with some higher items, to see how that all works. As a first approximation, I've come up with this (range bands were set to 100k km)
Trafalgar class Light Cruiser 13,500 tons 1335 Crew 18612 BP TCS 270 TH 1150 EM 3120
8518 km/s Armour 10-50 Shields 104-300 Sensors 160/1/0/0 Damage Control Rating 38 PPV 113.16
Maint Life 4.04 Years MSP 7893 AFR 182% IFR 2.5% 1YR 774 5YR 11606 Max Repair 2250 MSP
Solid Core Anti-matter Drive E2.6 (10) Power 230 Fuel Use 26% Signature 115 Armour 0 Exp 12%
Fuel Capacity 550,000 Litres Range 282.0 billion km (383 days at full power)
Sigma R300/16 Shields (13) Total Fuel Cost 208 Litres per day
40cm C10 Extreme X-ray Laser (4) Range 800,000km TS: 12500 km/s Power 40-10 RM 9 ROF 20 36 18 12 9 7 5 5 4 0 0
Triple Gauss Cannon R6-85 Turret (3x18) Range 60,000km TS: 32000 km/s Power 0-0 RM 6 ROF 5 0 0 0 0 0 0 0 0 0 0
Fire Control S03 100-37500 (3) Max Range: 200,000 km TS: 37500 km/s 50 0 0 0 0 0 0 0 0 0
Fire Control S04 400-12500 H10 (4) Max Range: 800,000 km TS: 12500 km/s 88 75 62 50 38 25 12 0 0 0
Gas-core Anti-matter Power Plant Technology PB-1 (1) Total Power Output 40 Armour 0 Exp 5%
Active Search Sensor MR809-R160 (30%) (1) GPS 25600 Range 809.5m km Resolution 160
PD Sensor MR32-R1 (10%) (1) GPS 80 Range 32.0m km Resolution 1
Thermal Sensor TH4-160 (30%) (1) Sensitivity 160 Detect Sig Strength 1000: 160m km
Compact ECCM-6 (4) ECM 60
This design is classed as a Military Vessel for maintenance purposes
1) Assumed fleet speed of 8500 km/s. Actually, I suspect fleet speed might be a bit lower than that, more like 7000 km/s, but this needs a bit more to close with hostiles, as it needs to get within 400k km to do much of anything
2) This ship is individually horribly vunerable to missiles. The Gauss turrets are adequate for final fire PD, mopping up remnants of salvoes, but it needs to be paired with AMM platforms. Hence the relatively overbuilt PD sensor, I think you could use this to spot incoming ASMs, and have small FFEs with reasonable AMM volleys provide AMM coverage out to 3 / 4 / 5m km. Would a couple of light laser turrets be a good idea, to provide more layered PD coverage?
3) If I understand FC correctly, the 40cm lasers will have an actual tracking speed equal to the ships max speed, 8518 km/s, not the nominal 12500 km/s listed for the weapon / FC. That could be fixed by turreting the lasers. I don't really want to use 40cm lasers for PD, but it would make them much better at killing FACs / fighters
4) The active search sensor is a bit weak, not really a deep search, but adequate to have on whilst tooling around unconquered space. It'll stop anything big sneaking up on me, without giving it a huge EM signature
5) The thermal sensor is supposed to allow this ship and its' group to run silent on sensors, but still have some detection ability, so they can't be totally bushwhacked. I don't really have a good feel for how thermal sensor figures "work" though, so I have no clue whether that is too much, too little or just right
6) I remembered to include an ECCM unit for each laser / FC combo, at least. The Gauss turrets, I'm not worried about, they are only likely to be shooting at missiles, or small craft without room for much EW equipment. I'm pretty sure all 3 would be able to kill just about any conceivable FAC class, although I suspect it'd be vunerable to fighter swarms
7) I don't really have a good feel for shields either. I think 100 ish points backed up with 10-deep armour would allow it to soak up a few ASM leakers on its' run in to beam range, and take hits from comparably sized beam weapons without too much internal damage, but again, I don't have a good instinctive feel for the likely damage output of its opponents
Anything else?