Krążownik torpedowy Choiseul - 08.06.2011

Niespełna rok temu (post z 2 lipca 2010 r.) prezentowałem krążownik torpedowy dla MW Francji. Okręt ten, delikatnie mówiąc, nie zachwycał, podobnie jak realnie istniejące jednostki tej klasy próbujące pogodzić sprzeczne wymagania - m.in prędkość, małe wymiary, silne uzbrojenie torpedowe itd. Postanowiłem więc zaprojektować jednostkę radykalnie większą - przy 6000 ton wyporności można się już pokusić o przyzwoite osiągi, opancerzenie i uzbrojenie. Otwarta oczywiście pozostaje kwestia przydatności jednostki wyposażonej w 30 wyrzutni torped - niemniej coś jednak może w tym być, skoro jeszcze pół wieku później pojawiał się (a w Japonii nawet były realizowane) podobne pomysły;-) 

Choiseul, french heavy torpedo cruiser laid down 1892 (Engine 1894)
Barbette ship

Displacement:
    5 045 t light; 5 270 t standard; 6 115 t normal; 6 790 t full load

Dimensions: Length overall / water x beam x draught
    422,24 ft / 422,24 ft x 48,23 ft x 18,37 ft (normal load)
    128,70 m / 128,70 m x 14,70 m  x 5,60 m

Armament:
      2 - 6,46" / 164 mm guns in single mounts, 134,59lbs / 61,05kg shells, 1892 Model
      Breech loading guns in open barbettes
      on centreline ends, evenly spread
      8 - 5,43" / 138 mm guns in single mounts, 80,19lbs / 36,37kg shells, 1892 Model
      Quick firing guns in casemate mounts
      on side, all amidships
      18 - 2,56" / 65,0 mm guns in single mounts, 8,38lbs / 3,80kg shells, 1892 Model
      Quick firing guns in deck mounts
      on side, evenly spread
    Weight of broadside 1 062 lbs / 482 kg
    Shells per gun, main battery: 150
    20 - 17,7" / 450 mm above water torpedoes, 10 - 17,7" / 450 mm submerged torpedo tubes

Armour:
   - Gun armour:    Face (max)    Other gunhouse (avg)    Barbette/hoist (max)
    Main:          -              -            5,12" / 130 mm
    2nd:    1,57" / 40 mm          -                  -

   - Armour deck: 2,56" / 65 mm, Conning tower: 5,12" / 130 mm

Machinery:
    Coal fired boilers, complex reciprocating steam engines,
    Direct drive, 2 shafts, 12 711 ihp / 9 482 Kw = 20,50 kts
    Range 6 000nm at 11,00 kts
    Bunker at max displacement = 1 520 tons (100% coal)

Complement:
    345 - 449

Cost:
    £0,595 million / $2,379 million

Distribution of weights at normal displacement:
    Armament: 133 tons, 2,2%
    Armour: 851 tons, 13,9%
       - Belts: 0 tons, 0,0%
       - Torpedo bulkhead: 0 tons, 0,0%
       - Armament: 127 tons, 2,1%
       - Armour Deck: 687 tons, 11,2%
       - Conning Tower: 37 tons, 0,6%
    Machinery: 2 192 tons, 35,8%
    Hull, fittings & equipment: 1 870 tons, 30,6%
    Fuel, ammunition & stores: 1 070 tons, 17,5%
    Miscellaneous weights: 0 tons, 0,0%

Overall survivability and seakeeping ability:
    Survivability (Non-critical penetrating hits needed to sink ship):
      2 863 lbs / 1 298 Kg = 21,3 x 6,5 " / 164 mm shells or 0,6 torpedoes
    Stability (Unstable if below 1.00): 1,46
    Metacentric height 3,2 ft / 1,0 m
    Roll period: 11,3 seconds
    Steadiness    - As gun platform (Average = 50 %): 94 %
            - Recoil effect (Restricted arc if above 1.00): 0,28
    Seaboat quality  (Average = 1.00): 1,88

Hull form characteristics:
    Hull has a flush deck
    Block coefficient: 0,572
    Length to Beam Ratio: 8,76 : 1
    'Natural speed' for length: 20,55 kts
    Power going to wave formation at top speed: 45 %
    Trim (Max stability = 0, Max steadiness = 100): 50
    Bow angle (Positive = bow angles forward): -15,00 degrees
    Stern overhang: 0,00 ft / 0,00 m
    Freeboard (% = measuring location as a percentage of overall length):
       - Stem:        20,57 ft / 6,27 m
       - Forecastle (20%):    16,60 ft / 5,06 m
       - Mid (50%):        14,37 ft / 4,38 m
       - Quarterdeck (15%):    14,37 ft / 4,38 m
       - Stern:        14,37 ft / 4,38 m
       - Average freeboard:    15,47 ft / 4,71 m
    Ship tends to be wet forward

Ship space, strength and comments:
    Space    - Hull below water (magazines/engines, low = better): 161,1%
        - Above water (accommodation/working, high = better): 61,8%
    Waterplane Area: 14 508 Square feet or 1 348 Square metres
    Displacement factor (Displacement / loading): 97%
    Structure weight / hull surface area: 80 lbs/sq ft or 390 Kg/sq metre
    Hull strength (Relative):
        - Cross-sectional: 0,96
        - Longitudinal: 1,50
        - Overall: 1,00
    Hull space for machinery, storage, compartmentation is cramped
    Room for accommodation and workspaces is cramped
    Ship has slow, easy roll, a good, steady gun platform
    Excellent seaboat, comfortable, can fire her guns in the heaviest weather