As a player, I don't like dealing with a multiplicity of ship types; they're excessively confusing to keep track of, which makes things hard to deal with and less fun than they should be. Fortunately, building a 'multimission' hull is the kind of thing that navies find very attractive, if they can make it work, so my laziness is explicable in-character.
Thus, the design spec I'm asking of Nordmark's destroyers includes ASW, antiaircraft, and torpedo-deployment all together in a hull small enough to be affordable and large enough to operate in company with the carrier groups. Variant-tinkering suggests that cutting the operational range down to about 4,000 nm would be enough to get an additional knot out of the same size hull, albeit with penalties to seakeeping. What do people think?
DD45B, Nordmark Destroyer laid down 1945
Displacement:
1,505 t light; 1,609 t standard; 1,836 t normal; 2,018 t full load
Dimensions: Length overall / water x beam x draught
334.84 ft / 328.08 ft x 32.81 ft x 13.12 ft (normal load)
102.06 m / 100.00 m x 10.00 m x 4.00 m
Armament:
4 - 5.12" / 130 mm guns in single mounts, 66.14lbs / 30.00kg shells, 1945 Model
Dual purpose guns in deck mounts with hoists
on centreline ends, evenly spread, 2 raised mounts - superfiring
12 - 1.57" / 40.0 mm guns (3x4 guns), 1.95lbs / 0.88kg shells, 1945 Model
Anti-aircraft guns in deck mounts
on centreline, all amidships, all raised mounts - superfiring
Weight of broadside 288 lbs / 131 kg
Shells per gun, main battery: 400
8 - 24.0" / 610 mm above water torpedoes
Armour:
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 0.98" / 25 mm 0.39" / 10 mm -
2nd: 0.39" / 10 mm - -
Machinery:
Oil fired boilers, steam turbines,
Geared drive, 2 shafts, 43,809 shp / 32,681 Kw = 33.00 kts
Range 5,500nm at 15.00 kts
Bunker at max displacement = 408 tons
Complement:
139 - 182
Cost:
£1.440 million / $5.759 million
Distribution of weights at normal displacement:
Armament: 36 tons, 2.0 %
Armour: 10 tons, 0.6 %
- Belts: 0 tons, 0.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 10 tons, 0.6 %
- Armour Deck: 0 tons, 0.0 %
- Conning Tower: 0 tons, 0.0 %
Machinery: 893 tons, 48.6 %
Hull, fittings & equipment: 505 tons, 27.5 %
Fuel, ammunition & stores: 331 tons, 18.0 %
Miscellaneous weights: 60 tons, 3.3 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
449 lbs / 204 Kg = 6.7 x 5.1 " / 130 mm shells or 0.3 torpedoes
Stability (Unstable if below 1.00): 1.17
Metacentric height 1.3 ft / 0.4 m
Roll period: 12.3 seconds
Steadiness - As gun platform (Average = 50 %): 46 %
- Recoil effect (Restricted arc if above 1.00): 0.54
Seaboat quality (Average = 1.00): 0.75
Hull form characteristics:
Hull has a flush deck
Block coefficient: 0.455
Length to Beam Ratio: 10.00 : 1
'Natural speed' for length: 18.11 kts
Power going to wave formation at top speed: 70 %
Trim (Max stability = 0, Max steadiness = 100): 57
Bow angle (Positive = bow angles forward): 10.00 degrees
Stern overhang: 3.28 ft / 1.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 19.69 ft / 6.00 m
- Forecastle (15 %): 16.40 ft / 5.00 m
- Mid (50 %): 13.12 ft / 4.00 m
- Quarterdeck (10 %): 13.12 ft / 4.00 m
- Stern: 13.12 ft / 4.00 m
- Average freeboard: 14.39 ft / 4.39 m
Ship tends to be wet forward
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 178.3 %
- Above water (accommodation/working, high = better): 43.3 %
Waterplane Area: 6,894 Square feet or 641 Square metres
Displacement factor (Displacement / loading): 71 %
Structure weight / hull surface area: 36 lbs/sq ft or 175 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.50
- Longitudinal: 2.01
- Overall: 0.58
Hull space for machinery, storage, compartmentation is cramped
Room for accommodation and workspaces is extremely poor
Poor seaboat, wet and uncomfortable, reduced performance in heavy weather