My firstest ever military ship designs. They're supposed to work in tandem, in a group of five, either by themselves or as part of a screen for a larger force.
Fleet Doctrine digression
This playthrough, I think I'm focusing on destroyers and cruisers; a cruiser group will have three (or maybe five) cruisers (light, regular, battle, or assault, depending on their tasks. Light cruisers are for speed, battlecruisers are stiff enough to trade shots with enemy battleships even though they won't win on their own, and assault cruisers are for chasing down and killing enemy light and regular cruisers. I've been reading Castles of Steel by Robert Massie. )
Later in the game, I'll probably field a handful of battleships. Maybe even a dreadnought or two, around which I'll cluster groups of cruisers and light cruisers. But the majority of the Navy will be cruiser-based, with destroyers acting as screens, forward scouts, and coast defense.
Okay, now that's over. . .
The ships
Weymouth class Destroyer 6,000 tons 141 Crew 1101.1 BP TCS 120 TH 625 EM 0
5208 km/s Armour 4-29 Shields 0-0 Sensors 1/1/0/0 Damage Control Rating 4 PPV 18
Maint Life 2.56 Years MSP 459 AFR 72% IFR 1% 1YR 98 5YR 1473 Max Repair 312.5 MSP
Intended Deployment Time: 48 months Spare Berths 0
Magazine 525
Wyatt-Hunt 625 EP Internal Fusion Drive (EP1.25 FC 1.75) (1) Power 625 Fuel Use 65.51% Signature 625 Exp 12%
Fuel Capacity 500,000 Litres Range 22.9 billion km (50 days at full power)
Carroll Advanced Defence Systems Size 6 Missile Launcher (75% Reduction) (4) Missile Size 6 Rate of Fire 120
Duncan-Griffin Missile Fire Control FC470-R100 (1) Range 470.4m km Resolution 100
Size 6 SRASM Trout Mk 2 (R 90) (48) Speed: 40,700 km/s End: 37m Range: 90.4m km WH: 16 Size: 6 TH: 135/81/40
Size 6 MRASM Tench (R 445) (40) Speed: 40,700 km/s End: 182m Range: 444.5m km WH: 9 Size: 6 TH: 135/81/40
Missile to hit chances are vs targets moving at 3000 km/s, 5000 km/s and 10,000 km/s
This design is classed as a Military Vessel for maintenance purposes
Weymouth B class Destroyer Leader 6,000 tons 145 Crew 1764.3 BP TCS 120 TH 625 EM 0
5208 km/s Armour 6-29 Shields 0-0 Sensors 110/1/0/0 Damage Control Rating 4 PPV 4.2
Maint Life 2.34 Years MSP 735 AFR 72% IFR 1% 1YR 183 5YR 2738 Max Repair 644 MSP
Intended Deployment Time: 48 months Spare Berths 0
Cryogenic Berths 200
Wyatt-Hunt 625 EP Internal Fusion Drive (EP1.25 FC 1.75) (1) Power 625 Fuel Use 65.51% Signature 625 Exp 12%
Fuel Capacity 500,000 Litres Range 22.9 billion km (50 days at full power)
Twin Holden-Palmer Technology Gauss Cannon R3-8 Turret (2x6) Range 30,000km TS: 20000 km/s Power 0-0 RM 3 ROF 5 1 1 1 0 0 0 0 0 0 0
Welch Heavy Industries Fire Control S02 24-16000 (1) Max Range: 48,000 km TS: 16000 km/s 79 58 38 17 0 0 0 0 0 0
Macdonald-Abbott Solutions Active Search Sensor MR179-R100 (1) GPS 22400 Range 179.2m km Resolution 100
Macdonald-Abbott Solutions Active Search Sensor MR515-R100 (1) GPS 64400 Range 515.2m km Resolution 100
Pearson-Reed Thermal Sensor TH10-110 (1) Sensitivity 110 Detect Sig Strength 1000: 110m km
This design is classed as a Military Vessel for maintenance purposes
Weymouth C PD class Destroyer 6,000 tons 150 Crew 1370.1 BP TCS 120 TH 625 EM 0
5208 km/s Armour 4-29 Shields 0-0 Sensors 1/1/0/0 Damage Control Rating 14 PPV 20.96
Maint Life 3.51 Years MSP 571 AFR 72% IFR 1% 1YR 71 5YR 1065 Max Repair 312.5 MSP
Intended Deployment Time: 48 months Spare Berths 1
Magazine 216
Wyatt-Hunt 625 EP Internal Fusion Drive (EP1.25 FC 1.75) (1) Power 625 Fuel Use 65.51% Signature 625 Exp 12%
Fuel Capacity 500,000 Litres Range 22.9 billion km (50 days at full power)
Twin Holden-Palmer Technology Gauss Cannon R3-8 Turret (2x6) Range 30,000km TS: 20000 km/s Power 0-0 RM 3 ROF 5 1 1 1 0 0 0 0 0 0 0
Quad Holden-Palmer Technology Gauss Cannon R3-8 Turret (2x12) Range 30,000km TS: 20000 km/s Power 0-0 RM 3 ROF 5 1 1 1 0 0 0 0 0 0 0
Welch Heavy Industries Fire Control S02 24-16000 (2) Max Range: 48,000 km TS: 16000 km/s 79 58 38 17 0 0 0 0 0 0
Carroll Advanced Defence Systems Size 1 Missile Launcher (75% Reduction) (12) Missile Size 1 Rate of Fire 20
Duncan-Griffin Missile Fire Control FC15-R1 (3) Range 15.1m km Resolution 1
Macdonald-Abbott Solutions Active Search Sensor MR15-R1 (6 Missile: 1.7) (1) GPS 196 Range 15.7m km MCR 1.7m km Resolution 1
This design is classed as a Military Vessel for maintenance purposes
Notes
The basic destroyer task group will consist of 2 Weymouths, 2 Weymouth C's, and 1 Weymouth B.
The last (and only) alien contacts I found destroyed two geosurvey and one gravsurvey vessels. They appear to be operating in 5-ship task-groups capable of ~4200km/s, with WH 12 missiles capable of ~19kkm/s. Of course, this was over a year ago, but it's what I had in mind during design.
The range on all these ships is a little low for my comfort, but maybe I should be more comfortable with it? I can always send a jump tender through with them - which I need to do anyway, since they don't have jump drives. (Destroyers in my Navy seldom will. )
The TG formation will try to put the PD destroyers roughly 15kkm in front of the rest of the group, 10kkm apart from one another, grouping the other two closer to the centre. I have no idea how to make fleet formations - only recently learned that assigning them was even a thing. Does this sound reasonable?
The destroyer leader has two active sensors. This is purposeful, for redundancy; the two break roughly at the desired 5000 tonne detection ranges for my Trout and Tench ASMs. Still, that could be changed to save weight or complexity. I'm not sure about the inclusion of the thermal sensor. It might allow me to detect large signatures outside my active range so I can be prepared for contact sooner, but it's also 500 tonnes. I think I could replace it with a single ASM launcher, 100 cap magazine, and a short-range ASM fire control if I got rid of the cryo and/or a layer of armor. (This is relevant to the biggest point, last. )
I'm pretty happy with the PD and the missile destroyers, though. Please rip them apart so I can learn what I've done wrong. (For one thing, I could further specialize - build two destroyer classes, one with reduced FC for close-in work, and the other carrying the MRASMs. )
My biggest complaint with the three is that they're not exchangeable at the shipyard, so I have to dedicate three separate shipyards for every destroyer TG I make. I don't think there's much way around that, though I might be wrong. From the Weymouth B, dropping the lower search band and including a missile system (dropping armor and cryo to bring it back down to 6000 tonnes) still doesn't allow any shipyard eligibility.
Edit to add: I'm really not impressed by CIWS, at least at this tech level. With the same tech and for the same weight, or in fact slightly less, I can include two twin-Gauss turrets and two fire controls with enough range to give me two salvos against the enemy missile types I've seen.