Well the problem is if you want a 16-16.5" gunned battleship, 45,000 tons will give you the best balanced design against other wesworld designs. You can design a 40,000 ton BB but you'll have to sacrifice speed, armour or number of guns to do it.
I suppose I could revise the orriginal Neptune deign, which really was too large to be a cruiser killer and too small to be a true BB.
Neptune, Atlantean Battlecruiser laid down 1936
Displacement:
30,352 t light; 31,938 t standard; 35,067 t normal; 37,570 t full load
Dimensions: Length overall / water x beam x draught
826.65 ft / 810.00 ft x 98.75 ft x 28.00 ft (normal load)
251.96 m / 246.89 m x 30.10 m x 8.53 m
Armament:
9 - 12.00" / 305 mm guns (3x3 guns), 885.00lbs / 401.43kg shells, 1936 Model
Breech loading guns in turrets (on barbettes)
on centreline ends, majority forward, 1 raised mount - superfiring
24 - 5.10" / 130 mm guns (12x2 guns), 66.33lbs / 30.09kg shells, 1936 Model
Dual purpose guns in deck mounts with hoists
on side, all amidships, 4 raised mounts - superfiring
20 - 1.58" / 40.0 mm guns (10x2 guns), 1.95lbs / 0.88kg shells, 1936 Model
Anti-aircraft guns in deck mounts
on side, evenly spread, all raised mounts
32 - 0.79" / 20.0 mm guns (8x4 guns), 0.24lbs / 0.11kg shells, 1936 Model
Anti-aircraft guns in deck mounts
on side, evenly spread, all raised mounts
8 - 0.50" / 12.7 mm guns (4x2 guns), 0.06lbs / 0.03kg shells, 1936 Model
Machine guns in deck mounts
on side, evenly spread, all raised mounts
Weight of broadside 9,604 lbs / 4,356 kg
Shells per gun, main battery: 160
Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 12.0" / 305 mm 440.00 ft / 134.11 m 12.00 ft / 3.66 m
Ends: Unarmoured
Main Belt covers 84 % of normal length
- Torpedo Bulkhead:
1.58" / 40 mm 440.00 ft / 134.11 m 30.00 ft / 9.14 m
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 12.0" / 305 mm 7.00" / 178 mm 10.0" / 254 mm
2nd: 2.00" / 51 mm 1.00" / 25 mm 1.58" / 40 mm
3rd: 1.00" / 25 mm - -
4th: 0.79" / 20 mm - -
5th: 0.50" / 13 mm - -
- Armour deck: 5.10" / 130 mm, Conning tower: 10.00" / 254 mm
Machinery:
Oil fired boilers, steam turbines,
Geared drive, 4 shafts, 149,522 shp / 111,543 Kw = 32.06 kts
Range 12,500nm at 15.00 kts
Bunker at max displacement = 5,632 tons
Complement:
1,280 - 1,665
Cost:
£13.911 million / $55.643 million
Distribution of weights at normal displacement:
Armament: 1,177 tons, 3.4 %
Armour: 11,132 tons, 31.7 %
- Belts: 2,786 tons, 7.9 %
- Torpedo bulkhead: 769 tons, 2.2 %
- Armament: 1,873 tons, 5.3 %
- Armour Deck: 5,473 tons, 15.6 %
- Conning Tower: 231 tons, 0.7 %
Machinery: 4,195 tons, 12.0 %
Hull, fittings & equipment: 13,647 tons, 38.9 %
Fuel, ammunition & stores: 4,715 tons, 13.4 %
Miscellaneous weights: 200 tons, 0.6 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
56,903 lbs / 25,811 Kg = 65.9 x 12.0 " / 305 mm shells or 8.6 torpedoes
Stability (Unstable if below 1.00): 1.12
Metacentric height 6.1 ft / 1.8 m
Roll period: 16.8 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0.48
Seaboat quality (Average = 1.00): 1.11
Hull form characteristics:
Hull has a flush deck
and transom stern
Block coefficient: 0.548
Length to Beam Ratio: 8.20 : 1
'Natural speed' for length: 32.82 kts
Power going to wave formation at top speed: 52 %
Trim (Max stability = 0, Max steadiness = 100): 63
Bow angle (Positive = bow angles forward): 20.00 degrees
Stern overhang: 5.00 ft / 1.52 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 32.00 ft / 9.75 m
- Forecastle (20 %): 22.00 ft / 6.71 m
- Mid (50 %): 22.00 ft / 6.71 m
- Quarterdeck (15 %): 22.00 ft / 6.71 m
- Stern: 22.00 ft / 6.71 m
- Average freeboard: 22.80 ft / 6.95 m
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 83.3 %
- Above water (accommodation/working, high = better): 189.9 %
Waterplane Area: 58,005 Square feet or 5,389 Square metres
Displacement factor (Displacement / loading): 120 %
Structure weight / hull surface area: 172 lbs/sq ft or 842 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 1.01
- Longitudinal: 1.11
- Overall: 1.02
Hull space for machinery, storage, compartmentation is excellent
Room for accommodation and workspaces is excellent
Ship has slow, easy roll, a good, steady gun platform
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Quoted
Originally posted by TheCanadian
Tuesday, May 14th 2024, 8:28am
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