Given the remaining tonnage left in the coastal defence catigory Atlantean designers have come up with a design around 6000 tons to maximize the ammount of hulls in this catigory. Should this design be approved it will look something like this:
Escort cruiser design A, Atlantis, Escort cruiser, laid down 1926
Displacement:
5,654 t light; 6,044 t standard; 6,703 t normal; 7,205 t full load
Loading submergence 486 tons/feet
Dimensions:
442.00 ft x 52.00 ft x 16.00 ft (normal load)
134.72 m x 15.85 m x 4.88 m
Armament:
6 - 9.20" / 234 mm guns (3 Main turrets x 2 guns)
8 - 5.50" / 140 mm guns
4 - 3.00" / 76 mm AA guns
12 - 1.00" / 25 mm guns
Weight of broadside 3,062 lbs / 1,389 kg
6 - 21.0" / 533.4 mm above water torpedoes
Armour:
Belt 7.90" / 201 mm, ends unarmoured
Belts cover 68 % of normal area
Main turrets 6.00" / 152 mm, 2nd gun shields 2.00" / 51 mm
Armour deck 4.00" / 102 mm, Conning tower 2.00" / 51 mm
Machinery:
Oil fired boilers, steam turbines,
Geared drive, 4 shafts, 12,488 shp / 9,316 Kw = 20.00 kts
Range 10,000nm at 12.00 kts
Complement:
370 - 481
Cost:
£1.988 million / $7.950 million
Distribution of weights at normal displacement:
Armament: 383 tons, 5.7 %
Armour: 2,312 tons, 34.5 %
Belts: 557 tons, 8.3 %, Armament: 481 tons, 7.2 %, Armour Deck: 1,259 tons, 18.8 %
Conning Tower: 15 tons, 0.2 %, Torpedo bulkhead: 0 tons, 0.0 %
Machinery: 400 tons, 6.0 %
Hull, fittings & equipment: 2,510 tons, 37.4 %
Fuel, ammunition & stores: 1,049 tons, 15.7 %
Miscellaneous weights: 50 tons, 0.7 %
Metacentric height 2.2
Remarks:
Hull space for machinery, storage & compartmentation is excellent
Room for accommodation & workspaces is cramped
Ship has slow, easy roll, a good, steady gun platform
Good seaboat, rides out heavy weather easily
Estimated overall survivability and seakeeping ability:
Relative margin of stability: 1.10
Shellfire needed to sink: 10,123 lbs / 4,592 Kg = 26.0 x 9.2 " / 234 mm shells
(Approx weight of penetrating shell hits needed to sink ship excluding critical hits)
Torpedoes needed to sink: 2.0
(Approx number of typical torpedo hits needed to sink ship)
Relative steadiness as gun platform: 71 %
(Average = 50 %)
Relative rocking effect from firing to beam: 0.93
Relative quality as seaboat: 1.26
Hull form characteristics:
Block coefficient: 0.638
Sharpness coefficient: 0.39
Hull speed coefficient 'M': 7.17
'Natural speed' for length: 21.02 kts
Power going to wave formation at top speed: 44 %
Trim: 56
(Maximise stabilty/flotation = 0, Maximise steadiness/seakeeping = 100)
Estimated hull characteristics & strength:
Underwater volume absorbed by magazines and engineering spaces: 64.9 %
Relative accommodation and working space: 86.2 %
(Average = 100%)
Displacement factor: 108 %
(Displacement relative to loading factors)
Relative cross-sectional hull strength: 1.00
(Structure weight / hull surface area: 104 lbs / square foot or 506 Kg / square metre)
Relative longitudinal hull strength: 1.09
(for 12.00 ft / 3.66 m average freeboard, freeboard adjustment -1.98 ft)
Relative composite hull strength: 1.01
Any comments?