Shell production might be the thing that kills the 15" design. I've simmed a quad 14" version that can have the turrets replaced with 16" ones.
USS Georgia, United States Battleship laid down 1931
Displacement:
38,145 t light; 40,497 t standard; 41,636 t normal; 42,546 t full load
Dimensions: Length overall / water x beam x draught
699.03 ft / 681.00 ft x 108.00 ft x 31.50 ft (normal load)
213.07 m / 207.57 m x 32.92 m x 9.60 m
Armament:
16 - 14.00" / 356 mm guns (4x4 guns), 1,575.00lbs / 714.41kg shells, 1931 Model
Breech loading guns in turrets (on barbettes)
on centreline ends, evenly spread, 2 raised mounts - superfiring
16 - 6.00" / 152 mm guns (8x2 guns), 108.00lbs / 48.99kg shells, 1931 Model
Breech loading guns in deck mounts with hoists
on side, all amidships, 4 raised mounts - superfiring
8 - 3.00" / 76.2 mm guns in single mounts, 13.50lbs / 6.12kg shells, 1931 Model
Anti-aircraft guns in deck mounts
on side, all amidships, all raised mounts - superfiring
Weight of broadside 27,036 lbs / 12,263 kg
Shells per gun, main battery: 100
Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 13.0" / 330 mm 424.00 ft / 129.24 m 12.47 ft / 3.80 m
Ends: Unarmoured
Main Belt covers 96 % of normal length
- Torpedo Bulkhead:
3.00" / 76 mm 424.00 ft / 129.24 m 30.54 ft / 9.31 m
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 16.0" / 406 mm 7.00" / 178 mm 13.0" / 330 mm
2nd: 2.00" / 51 mm 2.00" / 51 mm 2.00" / 51 mm
- Armour deck: 6.00" / 152 mm, Conning tower: 13.00" / 330 mm
Machinery:
Oil fired boilers, steam turbines,
Electric motors, 4 shafts, 81,083 shp / 60,488 Kw = 25.00 kts
Range 8,000nm at 10.00 kts
Bunker at max displacement = 2,049 tons
Complement:
1,456 - 1,894
Cost:
£18.206 million / $72.825 million
Distribution of weights at normal displacement:
Armament: 2,974 tons, 7.1 %
Armour: 14,919 tons, 35.8 %
- Belts: 3,050 tons, 7.3 %
- Torpedo bulkhead: 1,437 tons, 3.5 %
- Armament: 3,961 tons, 9.5 %
- Armour Deck: 6,134 tons, 14.7 %
- Conning Tower: 336 tons, 0.8 %
Machinery: 2,425 tons, 5.8 %
Hull, fittings & equipment: 17,678 tons, 42.5 %
Fuel, ammunition & stores: 3,491 tons, 8.4 %
Miscellaneous weights: 150 tons, 0.4 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
54,062 lbs / 24,522 Kg = 39.4 x 14.0 " / 356 mm shells or 8.9 torpedoes
Stability (Unstable if below 1.00): 1.10
Metacentric height 6.7 ft / 2.0 m
Roll period: 17.5 seconds
Steadiness - As gun platform (Average = 50 %): 50 %
- Recoil effect (Restricted arc if above 1.00): 0.89
Seaboat quality (Average = 1.00): 1.19
Hull form characteristics:
Hull has a flush deck
Block coefficient: 0.629
Length to Beam Ratio: 6.31 : 1
'Natural speed' for length: 26.10 kts
Power going to wave formation at top speed: 50 %
Trim (Max stability = 0, Max steadiness = 100): 42
Bow angle (Positive = bow angles forward): 37.50 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 23.50 ft / 7.16 m
- Forecastle (21 %): 22.50 ft / 6.86 m
- Mid (50 %): 21.50 ft / 6.55 m
- Quarterdeck (21 %): 21.50 ft / 6.55 m
- Stern: 21.50 ft / 6.55 m
- Average freeboard: 21.94 ft / 6.69 m
Ship tends to be wet forward
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 90.3 %
- Above water (accommodation/working, high = better): 157.3 %
Waterplane Area: 55,263 Square feet or 5,134 Square metres
Displacement factor (Displacement / loading): 95 %
Structure weight / hull surface area: 236 lbs/sq ft or 1,152 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.95
- Longitudinal: 1.60
- Overall: 1.00
Hull space for machinery, storage, compartmentation is adequate
Room for accommodation and workspaces is excellent
16" Version
USS Georgia, United States Battleship laid down 1931
Displacement:
38,782 t light; 41,148 t standard; 42,296 t normal; 43,215 t full load
Dimensions: Length overall / water x beam x draught
698.65 ft / 681.00 ft x 108.00 ft x 32.00 ft (normal load)
212.95 m / 207.57 m x 32.92 m x 9.75 m
Armament:
12 - 16.00" / 406 mm guns (4x3 guns), 2,100.00lbs / 952.54kg shells, 1931 Model
Breech loading guns in turrets (on barbettes)
on centreline ends, evenly spread, 2 raised mounts - superfiring
16 - 6.00" / 152 mm guns (8x2 guns), 108.00lbs / 48.99kg shells, 1931 Model
Breech loading guns in deck mounts with hoists
on side, all amidships, 4 raised mounts - superfiring
8 - 3.00" / 76.2 mm guns in single mounts, 13.50lbs / 6.12kg shells, 1931 Model
Anti-aircraft guns in deck mounts
on side, all amidships, all raised mounts - superfiring
Weight of broadside 27,036 lbs / 12,263 kg
Shells per gun, main battery: 100
Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 13.0" / 330 mm 424.00 ft / 129.24 m 12.47 ft / 3.80 m
Ends: Unarmoured
Main Belt covers 96 % of normal length
- Torpedo Bulkhead:
3.00" / 76 mm 424.00 ft / 129.24 m 30.54 ft / 9.31 m
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 16.0" / 406 mm 7.00" / 178 mm 13.0" / 330 mm
2nd: 2.00" / 51 mm 2.00" / 51 mm 2.00" / 51 mm
- Armour deck: 6.00" / 152 mm, Conning tower: 13.00" / 330 mm
Machinery:
Oil fired boilers, steam turbines,
Electric motors, 4 shafts, 81,794 shp / 61,018 Kw = 25.00 kts
Range 8,000nm at 10.00 kts
Bunker at max displacement = 2,067 tons
Complement:
1,474 - 1,917
Cost:
£19.519 million / $78.076 million
Distribution of weights at normal displacement:
Armament: 3,302 tons, 7.8 %
Armour: 15,240 tons, 36.0 %
- Belts: 3,050 tons, 7.2 %
- Torpedo bulkhead: 1,437 tons, 3.4 %
- Armament: 4,279 tons, 10.1 %
- Armour Deck: 6,134 tons, 14.5 %
- Conning Tower: 340 tons, 0.8 %
Machinery: 2,446 tons, 5.8 %
Hull, fittings & equipment: 17,645 tons, 41.7 %
Fuel, ammunition & stores: 3,514 tons, 8.3 %
Miscellaneous weights: 150 tons, 0.4 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
49,981 lbs / 22,671 Kg = 24.4 x 16.0 " / 406 mm shells or 8.0 torpedoes
Stability (Unstable if below 1.00): 1.06
Metacentric height 6.3 ft / 1.9 m
Roll period: 18.1 seconds
Steadiness - As gun platform (Average = 50 %): 50 %
- Recoil effect (Restricted arc if above 1.00): 0.89
Seaboat quality (Average = 1.00): 1.14
Hull form characteristics:
Hull has a flush deck
Block coefficient: 0.629
Length to Beam Ratio: 6.31 : 1
'Natural speed' for length: 26.10 kts
Power going to wave formation at top speed: 50 %
Trim (Max stability = 0, Max steadiness = 100): 44
Bow angle (Positive = bow angles forward): 37.50 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 23.00 ft / 7.01 m
- Forecastle (21 %): 22.00 ft / 6.71 m
- Mid (50 %): 21.00 ft / 6.40 m
- Quarterdeck (21 %): 21.00 ft / 6.40 m
- Stern: 21.00 ft / 6.40 m
- Average freeboard: 21.44 ft / 6.53 m
Ship tends to be wet forward
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 95.6 %
- Above water (accommodation/working, high = better): 151.8 %
Waterplane Area: 55,263 Square feet or 5,134 Square metres
Displacement factor (Displacement / loading): 91 %
Structure weight / hull surface area: 236 lbs/sq ft or 1,150 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.95
- Longitudinal: 1.51
- Overall: 1.00
Hull space for machinery, storage, compartmentation is adequate
Room for accommodation and workspaces is excellent