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Karle94
Post subject: USS South Carolina BB-26 as a semi-dreadnoughtPosted: January 30th, 2019, 8:31 pm
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I have done three different designs on the South Carolina as a full sized dreadnought battleship, instead of her real-life design, which was a pre-dreadnought posing as a dreadnought. Seriously, though, the South Carolina class was 138 meters long, compared to the 155m of the Dreadnought. My fourth design for an "alternate" design for the South Carolina is a semi-dreadnought design. It keeps the overall size of the original real design, but switches around the arnament. She now has only four 12 inch guns, but has four turrets amidships with 10 inch guns from the Tennessee class armored cruisers. She also has the six inch casemated guns mounted in the hull.

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  • USS South Carolina, USA, Semi-Dreadnought laid down in 1904

    Displacement:
    16 470 t light; 17 367 t standard; 18 713 t normal; 19 790 t full load

    Dimensions: Length overall / water x beam x draught
    452,00 ft / 448,00 ft x 78,74 ft x 25,00 ft (normal load)
    137,77 m / 136,55 m x 24,00 m x 7,62 m

    Armament:
    4 - 12,00" / 305 mm guns (2x2 guns), 864,00lbs / 391,90kg shells, 1904 Model
    Breech loading guns in turrets (on barbettes)
    on centreline ends, evenly spread
    8 - 10,00" / 254 mm guns (4x2 guns), 500,00lbs / 226,80kg shells, 1904 Model
    Breech loading guns in turrets (on barbettes)
    on side, all amidships
    10 - 6,00" / 152 mm guns in single mounts, 108,00lbs / 48,99kg shells, 1904 Model
    Breech loading guns in casemate mounts
    on side, evenly spread
    16 - 3,00" / 76,2 mm guns (8x2 guns), 13,50lbs / 6,12kg shells, 1904 Model
    Breech loading guns in deck mounts
    on side, evenly spread
    Weight of broadside 8 752 lbs / 3 970 kg
    Shells per gun, main battery: 100
    2 - 21,0" / 533,4 mm submerged torpedo tubes

    Armour:
    - Belts: Width (max) Length (avg) Height (avg)
    Main: 12,0" / 305 mm 287,50 ft / 87,63 m 15,50 ft / 4,72 m
    Ends: 8,00" / 203 mm 106,00 ft / 32,31 m 8,50 ft / 2,59 m
    54,50 ft / 16,61 m Unarmoured ends
    Main Belt covers 99 % of normal length
    Main belt does not fully cover magazines and engineering spaces

    - Torpedo Bulkhead:
    1,50" / 38 mm 336,50 ft / 102,57 m 12,00 ft / 3,66 m

    - Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
    Main: 12,0" / 305 mm 8,00" / 203 mm 10,0" / 254 mm
    2nd: 9,00" / 229 mm 2,50" / 64 mm 9,00" / 229 mm
    3rd: 2,50" / 64 mm 2,50" / 64 mm -

    - Armour deck: 2,50" / 64 mm, Conning tower: 12,00" / 305 mm

    Machinery:
    Coal fired boilers, complex reciprocating steam engines,
    Direct drive, 2 shafts, 18 479 ihp / 13 785 Kw = 18,50 kts
    Range 6 950nm at 10,00 kts
    Bunker at max displacement = 2 423 tons (100% coal)

    Complement:
    799 - 1 039

    Cost:
    £1,876 million / $7,503 million

    Distribution of weights at normal displacement:
    Armament: 1 094 tons, 5,8 %
    Armour: 6 316 tons, 33,8 %
    - Belts: 2 670 tons, 14,3 %
    - Torpedo bulkhead: 224 tons, 1,2 %
    - Armament: 1 882 tons, 10,1 %
    - Armour Deck: 1 358 tons, 7,3 %
    - Conning Tower: 182 tons, 1,0 %
    Machinery: 2 717 tons, 14,5 %
    Hull, fittings & equipment: 6 242 tons, 33,4 %
    Fuel, ammunition & stores: 2 243 tons, 12,0 %
    Miscellaneous weights: 100 tons, 0,5 %

    Overall survivability and seakeeping ability:
    Survivability (Non-critical penetrating hits needed to sink ship):
    19 890 lbs / 9 022 Kg = 23,0 x 12,0 " / 305 mm shells or 2,7 torpedoes
    Stability (Unstable if below 1.00): 1,12
    Metacentric height 4,3 ft / 1,3 m
    Roll period: 15,9 seconds
    Steadiness - As gun platform (Average = 50 %): 79 %
    - Recoil effect (Restricted arc if above 1.00): 0,91
    Seaboat quality (Average = 1.00): 1,58

    Hull form characteristics:
    Hull has rise aft of midbreak, low quarterdeck
    Block coefficient: 0,743
    Length to Beam Ratio: 5,69 : 1
    'Natural speed' for length: 21,17 kts
    Power going to wave formation at top speed: 49 %
    Trim (Max stability = 0, Max steadiness = 100): 50
    Bow angle (Positive = bow angles forward): 9,10 degrees
    Stern overhang: -2,00 ft / -0,61 m
    Freeboard (% = measuring location as a percentage of overall length):
    - Stem: 25,00 ft / 7,62 m
    - Forecastle (20 %): 22,00 ft / 6,71 m
    - Mid (50 %): 13,50 ft / 4,11 m (22,00 ft / 6,71 m aft of break)
    - Quarterdeck (15 %): 13,50 ft / 4,11 m (22,00 ft / 6,71 m before break)
    - Stern: 15,00 ft / 4,57 m
    - Average freeboard: 19,80 ft / 6,04 m

    Ship space, strength and comments:
    Space - Hull below water (magazines/engines, low = better): 126,1 %
    - Above water (accommodation/working, high = better): 140,2 %
    Waterplane Area: 29 357 Square feet or 2 727 Square metres
    Displacement factor (Displacement / loading): 91 %
    Structure weight / hull surface area: 151 lbs/sq ft or 739 Kg/sq metre
    Hull strength (Relative):
    - Cross-sectional: 0,92
    - Longitudinal: 2,01
    - Overall: 1,00
    Hull space for machinery, storage, compartmentation is cramped
    Room for accommodation and workspaces is excellent
    Ship has slow, easy roll, a good, steady gun platform
    Excellent seaboat, comfortable, can fire her guns in the heaviest weather


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eswube
Post subject: Re: USS South Carolina BB-26 as a semi-dreadnoughtPosted: February 2nd, 2019, 10:27 am
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Joined: June 15th, 2011, 8:31 am
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It's not a good looking ship, but certainly a well done drawing. Keep it up!

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Sea Skimmer
Post subject: Re: USS South Carolina BB-26 as a semi-dreadnoughtPosted: March 5th, 2019, 7:07 am
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Joined: December 4th, 2017, 10:29 pm
I highly approve of this concept, the more demented a ship the better.

I have a bonus joker card idea. Make another version with 'uniform' battery of 10in guns, but with EVERY turret being two story with 7in guns above the 10in battery, and upgrade the casemates to 7in too.


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Charguizard
Post subject: Re: USS South Carolina BB-26 as a semi-dreadnoughtPosted: March 6th, 2019, 4:17 pm
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Joined: January 28th, 2017, 1:17 am
Location: Santiago Basin
I love this stubby industrial little monster, good job! The elevated platforms for the 3" guns to clear the secondary turrets is specially interesting.

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Karle94
Post subject: Re: USS South Carolina BB-26 as a semi-dreadnoughtPosted: March 6th, 2019, 4:55 pm
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Joined: November 8th, 2010, 3:07 pm
Location: Norseland
Those platforms are on top of the turrets. As for stubby, it's the same size as the real life South Carolina. The super structure is longer because I removed the superfiring turrets.


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