US/CL/1936b1, United States Light Cruiser laid down 1936
Displacement:
11,190 t light; 11,617 t standard; 12,751 t normal; 13,658 t full load
Dimensions: Length overall / water x beam x draught
611.08 ft / 610.00 ft x 62.00 ft x 25.00 ft (normal load)
186.26 m / 185.93 m x 18.90 m x 7.62 m
Armament:
16 - 5.00" / 127 mm guns (8x2 guns), 62.50lbs / 28.35kg shells, 1936 Model
Dual purpose guns in turrets (on barbettes)
on centreline ends, evenly spread, all raised mounts - superfiring
32 - 1.57" / 40.0 mm guns (8x4 guns), 1.95lbs / 0.89kg shells, 1936 Model
Anti-aircraft guns in deck mounts
on side ends, evenly spread, all raised mounts - superfiring
Weight of broadside 1,062 lbs / 482 kg
Shells per gun, main battery: 280
8 - 21.0" / 533.4 mm above water torpedoes
Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 3.00" / 76 mm 395.00 ft / 120.40 m 16.00 ft / 4.88 m
Ends: Unarmoured
Main Belt covers 100 % of normal length
Main belt does not fully cover magazines and engineering spaces
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 2.00" / 51 mm 2.00" / 51 mm 2.00" / 51 mm
- Armour deck: 2.00" / 51 mm, Conning tower: 3.00" / 76 mm
Machinery:
Oil fired boilers, steam turbines,
Geared drive, 4 shafts, 155,242 shp / 115,810 Kw = 36.00 kts
Range 8,000nm at 15.00 kts
Bunker at max displacement = 2,042 tons
Complement:
599 - 779
Cost:
£5.869 million / $23.475 million
Distribution of weights at normal displacement:
Armament: 133 tons, 1.0 %
Armour: 2,042 tons, 16.0 %
- Belts: 789 tons, 6.2 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 308 tons, 2.4 %
- Armour Deck: 909 tons, 7.1 %
- Conning Tower: 35 tons, 0.3 %
Machinery: 4,356 tons, 34.2 %
Hull, fittings & equipment: 4,660 tons, 36.5 %
Fuel, ammunition & stores: 1,561 tons, 12.2 %
Miscellaneous weights: 0 tons, 0.0 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
10,778 lbs / 4,889 Kg = 172.4 x 5.0 " / 127 mm shells or 1.3 torpedoes
Stability (Unstable if below 1.00): 1.20
Metacentric height 3.4 ft / 1.0 m
Roll period: 14.1 seconds
Steadiness - As gun platform (Average = 50 %): 52 %
- Recoil effect (Restricted arc if above 1.00): 0.29
Seaboat quality (Average = 1.00): 1.04
Hull form characteristics:
Hull has a flush deck
Block coefficient: 0.472
Length to Beam Ratio: 9.84 : 1
'Natural speed' for length: 24.70 kts
Power going to wave formation at top speed: 61 %
Trim (Max stability = 0, Max steadiness = 100): 50
Bow angle (Positive = bow angles forward): 2.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 31.00 ft / 9.45 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: 22.72 ft / 6.93 m
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 119.7 %
- Above water (accommodation/working, high = better): 146.9 %
Waterplane Area: 24,577 Square feet or 2,283 Square metres
Displacement factor (Displacement / loading): 108 %
Structure weight / hull surface area: 106 lbs/sq ft or 516 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.94
- Longitudinal: 1.84
- Overall: 1.00
Hull space for machinery, storage, compartmentation is cramped
Room for accommodation and workspaces is excellent
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Sunday, January 23, 2005
Springsharp is using too low a SHP/ton: US/CL/1936b1 (AA cruiser)
I have my US/CL/1936b1 design, but it is warped because Springsharp is only using a 35.64 SHP/ton machinery basis. That means the machinery is too heavy and takes up too much space. Given that, I was able to achieve a 36-knot AA cruiser with 8-21 TT and 16-5in DP guns (along with 32-40mm AA). The armor basis is 3in, with a 2in deck. The range is 8,000 nm, as that seemed like a reasonable compromise:
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