This is towards the high end of the series of designs, of which I previously posted the 12in gun version. The 16in gun version does not work as well. I would guess that the reason is that the relatively shallow draft decreases seakeeping and composite strength in SpringSharp. The roiginal specification follows:
Displacement= 46,132 tons
9-16in guns
L= 814ft
B= 120ft
D= 30ft
Cp= 0.58
Cm= 0.95
Speed= 29 knots
Belt= 14in
Decks= 4in + 2in
This version seems more heavily protected, and other factors suffer, due to that. This is the Springsharp report:
Ger/CB/1937 16inch, Germany Battlecruiser laid down 1937
Displacement:
42,166 t light; 44,100 t standard; 46,132 t normal; 47,758 t full load
Dimensions: Length overall / water x beam x draught
817.47 ft / 814.00 ft x 120.00 ft x 30.00 ft (normal load)
249.16 m / 248.11 m x 36.58 m x 9.14 m
Armament:
9 - 16.00" / 406 mm guns (3x3 guns), 2,048.00lbs / 928.96kg shells, 1937 Model
Breech loading guns in turrets (on barbettes)
on centreline ends, majority forward, 1 raised mount - superfiring
24 - 5.00" / 127 mm guns (12x2 guns), 62.50lbs / 28.35kg shells, 1937 Model
Dual purpose guns in turrets (on barbettes)
on side, all amidships
Weight of broadside 19,932 lbs / 9,041 kg
Shells per gun, main battery: 90
Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 14.0" / 356 mm 535.00 ft / 163.07 m 17.00 ft / 5.18 m
Ends: Unarmoured
Main Belt covers 101 % of normal length
- Torpedo Bulkhead:
3.00" / 76 mm 535.00 ft / 163.07 m 26.00 ft / 7.92 m
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 14.0" / 356 mm 9.00" / 229 mm 14.0" / 356 mm
2nd: 5.00" / 127 mm 5.00" / 127 mm 5.00" / 127 mm
- Armour deck: 4.00" / 102 mm, Conning tower: 14.00" / 356 mm
Machinery:
Oil fired boilers, steam turbines,
Geared drive, 4 shafts, 140,783 shp / 105,024 Kw = 29.00 kts
Range 6,250nm at 15.00 kts
Bunker at max displacement = 3,658 tons
Complement:
1,573 - 2,046
Cost:
£22.445 million / $89.780 million
Distribution of weights at normal displacement:
Armament: 2,492 tons, 5.4 %
Armour: 16,588 tons, 36.0 %
- Belts: 5,505 tons, 11.9 %
- Torpedo bulkhead: 1,544 tons, 3.3 %
- Armament: 4,102 tons, 8.9 %
- Armour Deck: 5,049 tons, 10.9 %
- Conning Tower: 388 tons, 0.8 %
Machinery: 3,902 tons, 8.5 %
Hull, fittings & equipment: 19,184 tons, 41.6 %
Fuel, ammunition & stores: 3,966 tons, 8.6 %
Miscellaneous weights: 0 tons, 0.0 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
69,130 lbs / 31,357 Kg = 33.8 x 16.0 " / 406 mm shells or 12.3 torpedoes
Stability (Unstable if below 1.00): 1.21
Metacentric height 9.3 ft / 2.8 m
Roll period: 16.5 seconds
Steadiness - As gun platform (Average = 50 %): 52 %
- Recoil effect (Restricted arc if above 1.00): 0.38
Seaboat quality (Average = 1.00): 1.04
Hull form characteristics:
Hull has a flush deck
Block coefficient: 0.551
Length to Beam Ratio: 6.78 : 1
'Natural speed' for length: 28.53 kts
Power going to wave formation at top speed: 49 %
Trim (Max stability = 0, Max steadiness = 100): 50
Bow angle (Positive = bow angles forward): 3.00 degrees
Stern overhang: 2.00 ft / 0.61 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 28.00 ft / 8.53 m
- Forecastle (20 %): 20.50 ft / 6.25 m
- Mid (50 %): 20.50 ft / 6.25 m
- Quarterdeck (15 %): 20.50 ft / 6.25 m
- Stern: 20.50 ft / 6.25 m
- Average freeboard: 21.10 ft / 6.43 m
Ship tends to be wet forward
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 81.9 %
- Above water (accommodation/working, high = better): 169.4 %
Waterplane Area: 68,233 Square feet or 6,339 Square metres
Displacement factor (Displacement / loading): 104 %
Structure weight / hull surface area: 217 lbs/sq ft or 1,060 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.99
- Longitudinal: 1.09
- Overall: 1.00
Hull space for machinery, storage, compartmentation is excellent
Room for accommodation and workspaces is excellent
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