US/CL/1937, United States Scout Cruiser laid down 1937
Displacement:
2,873 t light; 2,990 t standard; 3,245 t normal; 3,449 t full load
Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
(444.48 ft / 439.00 ft) x 44.00 ft x (14.00 / 14.57 ft)
(135.48 m / 133.81 m) x 13.41 m x (4.27 / 4.44 m)
Armament:
9 - 5.10" / 130 mm 50.0 cal guns - 70.21lbs / 31.85kg shells, 150 per gun
Anti-air guns in deck and hoist mounts , 1937 Model
3 x Single mounts on centreline ends, majority forward
3 raised mounts
Weight of broadside 632 lbs / 632 kg
Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 2.00" / 51 mm 320.00 ft / 97.54 m 10.00 ft / 3.05 m
Ends: Unarmoured
Main Belt covers 112 % of normal length
Main belt does not fully cover magazines and engineering spaces
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 1.00" / 25 mm 1.00" / 25 mm 1.00" / 25 mm
- Armour deck: 1.00" / 25 mm, Conning tower: 4.00" / 102 mm
Machinery:
Oil fired boilers, steam turbines,
Geared drive, 2 shafts, 36,242 shp / 27,036 Kw = 31.40 kts
Range 4,300nm at 15.00 kts
Bunker at max displacement = 458 tons
Complement:
214 - 279
Cost:
£1.680 million / $6.720 million
Distribution of weights at normal displacement:
Armament: 189 tons, 5.8 %
Armour: 531 tons, 16.4 %
- Belts: 261 tons, 8.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 21 tons, 0.6 %
- Armour Deck: 231 tons, 7.1 %
- Conning Tower: 19 tons, 0.6 %
Machinery: 1,004 tons, 31.0 %
Hull, fittings & equipment: 1,258 tons, 38.8 %
Fuel, ammunition & stores: 372 tons, 11.5 %
Miscellaneous weights: 0 tons, 0.0 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
2,616 lbs / 1,187 Kg = 39.4 x 5.1 " / 130 mm shells or 0.7 torpedoes
Stability (Unstable if below 1.00): 1.19
Metacentric height 2.0 ft / 0.6 m
Roll period: 13.1 seconds
Steadiness - As gun platform (Average = 50 %): 52 %
- Recoil effect (Restricted arc if above 1.00): 0.47
Seaboat quality (Average = 1.00): 1.05
Hull form characteristics:
Hull has a flush deck,
a normal bow and large transom stern
Block coefficient (normal/deep): 0.420 / 0.429
Length to Beam Ratio: 9.98 : 1
'Natural speed' for length: 24.17 kts
Power going to wave formation at top speed: 59 %
Trim (Max stability = 0, Max steadiness = 100): 50
Bow angle (Positive = bow angles forward): 9.00 degrees
Stern overhang: 2.00 ft / 0.61 m
Freeboard (% = length of deck as a percentage of waterline length):
Fore end, Aft end
- Forecastle: 20.00 %, 22.00 ft / 6.71 m, 18.00 ft / 5.49 m
- Forward deck: 30.00 %, 18.00 ft / 5.49 m, 15.00 ft / 4.57 m
- Aft deck: 35.00 %, 15.00 ft / 4.57 m, 13.00 ft / 3.96 m
- Quarter deck: 15.00 %, 13.00 ft / 3.96 m, 12.00 ft / 3.66 m
- Average freeboard: 15.65 ft / 4.77 m
Ship tends to be wet forward
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 119.3 %
- Above water (accommodation/working, high = better): 168.6 %
Waterplane Area: 12,502 Square feet or 1,161 Square metres
Displacement factor (Displacement / loading): 102 %
Structure weight / hull surface area: 62 lbs/sq ft or 301 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.74
- Longitudinal: 1.47
- Overall: 0.79
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.
Thursday, May 24, 2007
In 2004, I wrote about a small cruiser
In 2004, I wrote about a small cruiser for use as a destroyer flagship.
I tried a design in Springsharp 3.01b1 and have an acceptable design. I may want to work at improving it, but I was able to achieve something viable. I don't have it fully developed, with an AA armament. The ship has 9-5.1in DP guns. This is the Springsharp report:
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