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
This is a forum for discussion of topics relating to the Dreadnought era, prior to the ascendency of naval aviation. We will be discussing history, ship design, and naval wargaming.
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:
This comment has been removed by a blog administrator.
ReplyDelete