Kanonierka pancerna

Kolejnym okrętem dla naszej floty jest kanonierka pancerna. W założeniu ma to być jednostka obrony wybrzeża, uzupełniająca w tej roli pancerniki obrony wybrzeża. Zakładam, że może to być jednostka bardziej przydatna niż dość licznie wybudowane uprzednio kanonierki typu ‘flat-iron”. Na razie proponuję pojedynczy okręt. W przyszłości zobaczymy, może doczeka się następców. 

Hydra, polish gunboat laid down 1888

Displacement:
    851 t light; 883 t standard; 961 t normal; 1 023 t full load

Dimensions: Length overall / water x beam x draught
    199,34 ft / 199,34 ft x 32,02 ft x 9,58 ft (normal load)
    60,76 m / 60,76 m x 9,76 m  x 2,92 m

Armament:
      1 - 7,99" / 203 mm guns in single mounts, 247,59lbs / 112,30kg shells, 1888 Model
      Breech loading gun in a deck mount with hoist
      on centreline forward
      1 - 4,21" / 107 mm guns in single mounts, 36,26lbs / 16,45kg shells, 1888 Model
      Breech loading gun in a deck mount with hoist
      on centreline aft
      3 - 1,85" / 47,0 mm guns in single mounts, 3,07lbs / 1,39kg shells, 1888 Model
      Quick firing guns in deck mounts
      on centreline, evenly spread, all raised mounts
    Weight of broadside 293 lbs / 133 kg
    Shells per gun, main battery: 75

Armour:
   - Belts:        Width (max)    Length (avg)        Height (avg)
    Main:    4,13" / 105 mm      66,80 ft / 20,36 m    7,25 ft / 2,21 m
    Ends:    Unarmoured
      Main Belt covers 52% of normal length
      Main belt does not fully cover magazines and engineering spaces

   - Gun armour:    Face (max)    Other gunhouse (avg)    Barbette/hoist (max)
    Main:    2,52" / 64 mm    1,18" / 30 mm              -
    2nd:    2,52" / 64 mm    1,18" / 30 mm              -

   - Armour deck: 0,98" / 25 mm, Conning tower: 2,52" / 64 mm

Machinery:
    Coal fired boilers, complex reciprocating steam engines,
    Direct drive, 1 shaft, 1 180 ihp / 880 Kw = 13,80 kts
    Range 2 240nm at 9,00 kts
    Bunker at max displacement = 140 tons (100% coal)

Complement:
    86 - 112

Cost:
    £0,092 million / $0,367 million

Distribution of weights at normal displacement:
    Armament: 37 tons, 3,8%
    Armour: 206 tons, 21,4%
       - Belts: 106 tons, 11,0%
       - Torpedo bulkhead: 0 tons, 0,0%
       - Armament: 16 tons, 1,7%
       - Armour Deck: 79 tons, 8,2%
       - Conning Tower: 5 tons, 0,6%
    Machinery: 222 tons, 23,1%
    Hull, fittings & equipment: 386 tons, 40,2%
    Fuel, ammunition & stores: 110 tons, 11,4%
    Miscellaneous weights: 0 tons, 0,0%

Overall survivability and seakeeping ability:
    Survivability (Non-critical penetrating hits needed to sink ship):
      970 lbs / 440 Kg = 3,9 x 8,0 " / 203 mm shells or 0,5 torpedoes
    Stability (Unstable if below 1.00): 1,35
    Metacentric height 1,5 ft / 0,5 m
    Roll period: 10,8 seconds
    Steadiness    - As gun platform (Average = 50 %): 73 %
            - Recoil effect (Restricted arc if above 1.00): 0,35
    Seaboat quality  (Average = 1.00): 1,46

Hull form characteristics:
    Hull has a flush deck
    Block coefficient: 0,550
    Length to Beam Ratio: 6,23 : 1
    'Natural speed' for length: 14,12 kts
    Power going to wave formation at top speed: 47 %
    Trim (Max stability = 0, Max steadiness = 100): 50
    Bow angle (Positive = bow angles forward): -17,00 degrees
    Stern overhang: 0,00 ft / 0,00 m
    Freeboard (% = measuring location as a percentage of overall length):
       - Stem:        8,01 ft / 2,44 m
       - Forecastle (20%):    7,51 ft / 2,29 m
       - Mid (50%):        6,99 ft / 2,13 m
       - Quarterdeck (15%):    6,99 ft / 2,13 m
       - Stern:        6,99 ft / 2,13 m
       - Average freeboard:    7,21 ft / 2,20 m
    Ship tends to be wet forward

Ship space, strength and comments:
    Space    - Hull below water (magazines/engines, low = better): 103,4%
        - Above water (accommodation/working, high = better): 68,0%
    Waterplane Area: 4 320 Square feet or 401 Square metres
    Displacement factor (Displacement / loading): 102%
    Structure weight / hull surface area: 62 lbs/sq ft or 303 Kg/sq metre
    Hull strength (Relative):
        - Cross-sectional: 0,93
        - Longitudinal: 1,96
        - Overall: 1,00
    Hull space for machinery, storage, compartmentation is adequate
    Room for accommodation and workspaces is cramped
    Ship has slow, easy roll, a good, steady gun platform
    Good seaboat, rides out heavy weather easily