Wonder if anybody's ever designed an 18 gun CL...
You mean somehing like this? Main gun caliber might not be that big, but still, 18 guns are 18 guns.
Agano, Japan Light Cruiser laid down 1928
Displacement:
7,754 t light; 7,993 t standard; 8,599 t normal; 9,049 t full load
Loading submergence 614 tons/feet
Dimensions:
600.00 ft x 57.00 ft x 17.60 ft (normal load)
182.88 m x 17.37 m x 5.36 m
Armament:
18 - 4.13" / 105 mm guns (6 Main turrets x 3 guns, 4 superfiring turrets)
8 - 2.95" / 75 mm guns (4 2nd turrets x 2 guns)
12 - 1.97" / 50 mm AA guns
24 - 0.98" / 25 mm guns
Weight of broadside 796 lbs / 361 kg
8 - 24.0" / 610 mm above water torpedoes
Armour:
Belt 4.00" / 102 mm, ends unarmoured
Belts cover 111 % of normal area
Main turrets 3.00" / 76 mm, 2nd turrets 1.00" / 25 mm
AA gun shields 1.00" / 25 mm, Light gun shields 1.00" / 25 mm
Armour deck 1.50" / 38 mm, Conning tower 3.00" / 76 mm
Machinery:
Oil fired boilers, steam turbines,
Geared drive, 2 shafts, 86,197 shp / 64,303 Kw = 33.00 kts
Range 5,000nm at 15.00 kts
Complement:
446 - 580
Cost:
£2.790 million / $11.160 million
Distribution of weights at normal displacement:
Armament: 99 tons, 1.2 %
Armour: 1,626 tons, 18.9 %
Belts: 640 tons, 7.4 %, Armament: 362 tons, 4.2 %, Armour Deck: 596 tons, 6.9 %
Conning Tower: 27 tons, 0.3 %, Torpedo bulkhead: 0 tons, 0.0 %
Machinery: 2,684 tons, 31.2 %
Hull, fittings & equipment: 3,345 tons, 38.9 %
Fuel, ammunition & stores: 845 tons, 9.8 %
Miscellaneous weights: 0 tons, 0.0 %
Metacentric height 2.5
Remarks:
Hull space for machinery, storage & compartmentation is adequate
Room for accommodation & workspaces is excellent
Estimated overall survivability and seakeeping ability:
Relative margin of stability: 1.09
Shellfire needed to sink: 8,578 lbs / 3,891 Kg = 242.9 x 4.1 " / 105 mm shells
(Approx weight of penetrating shell hits needed to sink ship excluding critical hits)
Torpedoes needed to sink: 1.3
(Approx number of typical torpedo hits needed to sink ship)
Relative steadiness as gun platform: 68 %
(Average = 50 %)
Relative rocking effect from firing to beam: 0.26
Relative quality as seaboat: 1.02
Hull form characteristics:
Block coefficient: 0.500
Sharpness coefficient: 0.33
Hull speed coefficient 'M': 8.96
'Natural speed' for length: 24.49 kts
Power going to wave formation at top speed: 56 %
Trim: 67
(Maximise stabilty/flotation = 0, Maximise steadiness/seakeeping = 100)
Estimated hull characteristics & strength:
Underwater volume absorbed by magazines and engineering spaces: 110.4 %
Relative accommodation and working space: 136.2 %
(Average = 100%)
Displacement factor: 110 %
(Displacement relative to loading factors)
Relative cross-sectional hull strength: 0.99
(Structure weight / hull surface area: 95 lbs / square foot or 463 Kg / square metre)
Relative longitudinal hull strength: 1.05
(for 18.80 ft / 5.73 m average freeboard, freeboard adjustment 4.11 ft)
Relative composite hull strength: 1.00