She is heavily optimised for nightfighting, with a large number of smaller guns, a incremental armour scheme and high speed, she also got a fairly large torpedo battery.
Survivability and stability got higher priority then seakeeping, as the Mediterranean is relatively calm and in a short range battle steadiness is irrelevant.
If a more balanced ship is wanted, i also got a nice design with nine 30,5cm guns, much better armour and 30kts speed.
Design I, Grecce Battlecruiser laid down 1931
Displacement:
28 865 t light; 30 000 t standard; 34 570 t normal; 38 226 t full load
Dimensions: Length overall / water x beam x draught
752,66 ft / 738,19 ft x 101,71 ft x 29,53 ft (normal load)
229,41 m / 225,00 m x 31,00 m x 9,00 m
Armament:
12 - 10,00" / 254 mm guns (4x3 guns), 500,00lbs / 226,80kg shells, 1912 Model
Breech loading guns in turrets (on barbettes)
on centreline ends, evenly spread, 2 raised mounts - superfiring
16 - 5,00" / 127 mm guns (8x2 guns), 62,50lbs / 28,35kg shells, 1931 Model
Dual purpose guns in deck mounts with hoists
on side, evenly spread, 4 raised mounts
24 - 1,46" / 37,0 mm guns (12x2 guns), 1,55lbs / 0,70kg shells, 1931 Model
Anti-aircraft guns in deck mounts with hoists
on side, evenly spread, all raised mounts
Weight of broadside 7 037 lbs / 3 192 kg
Shells per gun, main battery: 110
12 - 21,0" / 533 mm above water torpedoes
Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 10,2" / 260 mm 426,51 ft / 130,00 m 14,76 ft / 4,50 m
Ends: 3,94" / 100 mm 262,47 ft / 80,00 m 11,52 ft / 3,51 m
49,21 ft / 15,00 m Unarmoured ends
Upper: 4,72" / 120 mm 426,51 ft / 130,00 m 8,01 ft / 2,44 m
Main Belt covers 89 % of normal length
- Torpedo Bulkhead:
1,38" / 35 mm 442,91 ft / 135,00 m 23,82 ft / 7,26 m
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 11,0" / 280 mm 4,33" / 110 mm 10,2" / 260 mm
3rd: 2,95" / 75 mm 1,97" / 50 mm 1,97" / 50 mm
4th: 0,98" / 25 mm - -
- Armour deck: 4,02" / 102 mm, Conning tower: 8,27" / 210 mm
Machinery:
Oil fired boilers, steam turbines,
Geared drive, 3 shafts, 173 261 shp / 129 253 Kw = 31,80 kts
Range 9 903nm at 19,00 kts
Bunker at max displacement = 8 226 tons
Complement:
1 266 - 1 647
Cost:
£10,798 million / $43,192 million
Distribution of weights at normal displacement:
Armament: 880 tons, 2,5 %
Armour: 10 616 tons, 30,7 %
- Belts: 3 994 tons, 11,6 %
- Torpedo bulkhead: 538 tons, 1,6 %
- Armament: 2 017 tons, 5,8 %
- Armour Deck: 3 877 tons, 11,2 %
- Conning Tower: 189 tons, 0,5 %
Machinery: 5 181 tons, 15,0 %
Hull, fittings & equipment: 12 108 tons, 35,0 %
Fuel, ammunition & stores: 5 705 tons, 16,5 %
Miscellaneous weights: 80 tons, 0,2 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
55 814 lbs / 25 317 Kg = 111,6 x 10,0 " / 254 mm shells or 7,9 torpedoes
Stability (Unstable if below 1.00): 1,22
Metacentric height 7,4 ft / 2,3 m
Roll period: 15,7 seconds
Steadiness - As gun platform (Average = 50 %): 52 %
- Recoil effect (Restricted arc if above 1.00): 0,29
Seaboat quality (Average = 1.00): 1,05
Hull form characteristics:
Hull has raised forecastle
Block coefficient: 0,546
Length to Beam Ratio: 7,26 : 1
'Natural speed' for length: 27,17 kts
Power going to wave formation at top speed: 56 %
Trim (Max stability = 0, Max steadiness = 100): 50
Bow angle (Positive = bow angles forward): 15,00 degrees
Stern overhang: 6,56 ft / 2,00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 29,53 ft / 9,00 m
- Forecastle (20 %): 23,79 ft / 7,25 m (23,62 ft / 7,20 m aft of break)
- Mid (45 %): 23,62 ft / 7,20 m
- Quarterdeck (15 %): 23,62 ft / 7,20 m
- Stern: 23,62 ft / 7,20 m
- Average freeboard: 24,11 ft / 7,35 m
Ship tends to be wet forward
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 85,8 %
- Above water (accommodation/working, high = better): 165,1 %
Waterplane Area: 52 190 Square feet or 4 849 Square metres
Displacement factor (Displacement / loading): 123 %
Structure weight / hull surface area: 164 lbs/sq ft or 799 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0,97
- Longitudinal: 1,28
- Overall: 1,00
Hull space for machinery, storage, compartmentation is adequate
Room for accommodation and workspaces is excellent