Mały pancernik dla Peru - proj. 513

22 lutego prezentowałem pancernik proj. 512 dla Peru. Ale nie była to jedyna propozycja złożona wówczas temu państwu przez koncern Vickersa. Innym był projekt 513, który prezentuję dzisiaj. Byłą to silniej uzbrojona, wolniejsza i lżej opancerzona wersja lekkiego pancernika. Okręt przy takiej samej wyporności tj. 11500 ton (choć zmienionych proporcjach kadłuba) miał mieć aż 6 dział kal. 356 mm (w dwóch lub trzech wieżach – informacje są na korzyść każdego z tych wariantów), co okupiono spadkiem prędkości do 19 w., cieńszym opancerzeniem burtowym o grubości 178 mm, zmniejszonym  do 102 mm kalibrem artylerii średniej oraz redukcją uzbrojenia torpedowego do 2 wyrzutni.

 

Nazca, peruvian light battleship laid down 1912 (Engine 1913)

Displacement:
    10 249 t light; 10 873 t standard; 11 505 t normal; 12 009 t full load

Dimensions: Length overall / water x beam x draught
    389,99 ft / 389,99 ft x 72,01 ft x 24,51 ft (normal load)
    118,87 m / 118,87 m x 21,95 m  x 7,47 m

Armament:
      6 - 14,02" / 356 mm guns (3x2 guns), 1 376,64lbs / 624,43kg shells, 1910 Model
      Breech loading guns in turrets (on barbettes)
      on centreline ends, majority forward, 1 raised mount - superfiring
      Main guns limited to end-on fire
      14 - 4,02" / 102 mm guns in single mounts, 32,38lbs / 14,69kg shells, 1913 Model
      Quick firing guns in casemate mounts
      on side, all amidships
      14 guns in hull casemates - Limited use in heavy seas
      2 - 2,99" / 76,0 mm guns in single mounts, 13,39lbs / 6,07kg shells, 1893 Model
      Quick firing guns in deck mounts
      on side, all forward
      2 - 1,46" / 37,0 mm guns in single mounts, 1,55lbs / 0,70kg shells, 1913 Model
      Anti-aircraft guns in deck mounts
      on centreline ends, evenly spread, all raised mounts
    Weight of broadside 8 743 lbs / 3 966 kg
    Shells per gun, main battery: 80
    2 - 21,0" / 533 mm submerged torpedo tubes

Armour:
   - Belts:        Width (max)    Length (avg)        Height (avg)
    Main:    7,01" / 178 mm    231,14 ft / 70,45 m    12,83 ft / 3,91 m
    Ends:    4,02" / 102 mm      99,90 ft / 30,45 m    12,83 ft / 3,91 m
      58,96 ft / 17,97 m Unarmoured ends
      Main Belt covers 91% of normal length
      Main belt does not fully cover magazines and engineering spaces

   - Torpedo Bulkhead:
        1,46" / 37 mm    231,14 ft / 70,45 m    23,49 ft / 7,16 m

   - Gun armour:    Face (max)    Other gunhouse (avg)    Barbette/hoist (max)
    Main:    8,50" / 216 mm    5,00" / 127 mm        7,99" / 203 mm
    2nd:    5,00" / 127 mm          -                  -

   - Armour deck: 2,09" / 53 mm (2,52" / 64 mm over amidships, 1,50" / 38 mm over ends), Conning tower: 7,99" / 203 mm

Machinery:
    Coal fired boilers, steam turbines,
    Geared drive, 2 shafts, 15 091 shp / 11 258 Kw = 19,00 kts
    Range 5 500nm at 10,00 kts
    Bunker at max displacement = 1 136 tons (100% coal)

Complement:
    555 - 722

Cost:
    £1,368 million / $5,471 million

Distribution of weights at normal displacement:
    Armament: 1 093 tons, 9,5%
    Armour: 3 530 tons, 30,7%
       - Belts: 1 140 tons, 9,9%
       - Torpedo bulkhead: 293 tons, 2,5%
       - Armament: 1 228 tons, 10,7%
       - Armour Deck: 782 tons, 6,8%
       - Conning Tower: 88 tons, 0,8%
    Machinery: 650 tons, 5,7%
    Hull, fittings & equipment: 4 976 tons, 43,3%
    Fuel, ammunition & stores: 1 255 tons, 10,9%
    Miscellaneous weights: 0 tons, 0,0%

Overall survivability and seakeeping ability:
    Survivability (Non-critical penetrating hits needed to sink ship):
      11 525 lbs / 5 228 Kg = 8,4 x 14,0 " / 356 mm shells or 2,2 torpedoes
    Stability (Unstable if below 1.00): 1,00
    Metacentric height 3,1 ft / 0,9 m
    Roll period: 17,3 seconds
    Steadiness    - As gun platform (Average = 50 %): 59 %
            - Recoil effect (Restricted arc if above 1.00): 1,18
    Seaboat quality  (Average = 1.00): 1,22

Hull form characteristics:
    Hull has a flush deck
    Block coefficient: 0,585
    Length to Beam Ratio: 5,42 : 1
    'Natural speed' for length: 19,75 kts
    Power going to wave formation at top speed: 51 %
    Trim (Max stability = 0, Max steadiness = 100): 48
    Bow angle (Positive = bow angles forward): -10,00 degrees
    Stern overhang: 0,00 ft / 0,00 m
    Freeboard (% = measuring location as a percentage of overall length):
       - Stem:        17,45 ft / 5,32 m
       - Forecastle (21%):    16,47 ft / 5,02 m
       - Mid (50%):        16,47 ft / 5,02 m
       - Quarterdeck (20%):    16,47 ft / 5,02 m
       - Stern:        16,96 ft / 5,17 m
       - Average freeboard:    16,60 ft / 5,06 m
    Ship tends to be wet forward

Ship space, strength and comments:
    Space    - Hull below water (magazines/engines, low = better): 126,3%
        - Above water (accommodation/working, high = better): 114,5%
    Waterplane Area: 20 255 Square feet or 1 882 Square metres
    Displacement factor (Displacement / loading): 85%
    Structure weight / hull surface area: 169 lbs/sq ft or 826 Kg/sq metre
    Hull strength (Relative):
        - Cross-sectional: 0,90
        - Longitudinal: 2,57
        - Overall: 1,00
    Hull space for machinery, storage, compartmentation is cramped
    Room for accommodation and workspaces is adequate
    Good seaboat, rides out heavy weather easily