Flota japońska w XIX w. - cz. IV - 17.09.2011

Dziś prezentuję jeden okręt - niezbyt dużą, za to szybką fregatę. W końcu lat 90-tych XIX w. byłby to jeden z najszybszych okrętów, nie tylko tej klasy, na świecie.

Myoko, japanese frigate laid down 1868 (Engine 1869)

Displacement:
    2 778 t light; 2 970 t standard; 3 257 t normal; 3 487 t full load

Dimensions: Length overall / water x beam x draught
    254,10 ft / 246,85 ft x 43,86 ft x 19,75 ft (normal load)
    77,45 m / 75,24 m x 13,37 m  x 6,02 m

Armament:
      18 - 7,01" / 178 mm guns in single mounts, 115,29lbs / 52,29kg shells, 1868 Model
      Muzzle loading guns in broadside mounts
      on side, evenly spread
      18 guns on gundeck (upper belt level) - Limited use in all but light seas
      4 - 3,74" / 95,0 mm guns in single mounts, 17,53lbs / 7,95kg shells, 1868 Model
      Breech loading guns in deck mounts
      on side ends, evenly spread
    Weight of broadside 2 145 lbs / 973 kg
    Shells per gun, main battery: 105

Machinery:
    Coal fired boilers, simple reciprocating steam engines,
    Direct drive, 1 shaft, 4 898 ihp / 3 654 Kw = 16,00 kts
    Range 2 750nm at 8,00 kts
    Bunker at max displacement = 517 tons (100% coal)

Complement:
    410

Cost:
    £0,472 million / $1,887 million

Distribution of weights at normal displacement:
    Armament: 268 tons, 8,2%
    Machinery: 1 067 tons, 32,7%
    Hull, fittings & equipment: 1 177 tons, 36,1%
    Fuel, ammunition & stores: 479 tons, 14,7%
    Miscellaneous weights: 267 tons, 8,2%

Overall survivability and seakeeping ability:
    Survivability (Non-critical penetrating hits needed to sink ship):
      620 lbs / 281 Kg = 5,4 x 7,0 " / 178 mm shells or 0,2 torpedoes
    Stability (Unstable if below 1.00): 1,46
    Metacentric height 2,8 ft / 0,9 m
    Roll period: 11,0 seconds
    Steadiness    - As gun platform (Average = 50 %): 49 %
            - Recoil effect (Restricted arc if above 1.00): 0,34
    Seaboat quality  (Average = 1.00): 0,97

Hull form characteristics:
    Hull has a flush deck
    Block coefficient: 0,533
    Length to Beam Ratio: 5,63 : 1
    'Natural speed' for length: 15,71 kts
    Power going to wave formation at top speed: 52 %
    Trim (Max stability = 0, Max steadiness = 100): 50
    Bow angle (Positive = bow angles forward): 26,00 degrees
    Stern overhang: 0,00 ft / 0,00 m
    Freeboard (% = measuring location as a percentage of overall length):
       - Stem:        14,86 ft / 4,53 m
       - Forecastle (20%):    12,96 ft / 3,95 m
       - Mid (50%):        12,96 ft / 3,95 m
       - Quarterdeck (15%):    12,96 ft / 3,95 m
       - Stern:        13,32 ft / 4,06 m
       - Average freeboard:    13,14 ft / 4,00 m
    Ship tends to be wet forward

Ship space, strength and comments:
    Space    - Hull below water (magazines/engines, low = better): 175,5%
        - Above water (accommodation/working, high = better): 82,6%
    Waterplane Area: 7 192 Square feet or 668 Square metres
    Displacement factor (Displacement / loading): 67%
    Structure weight / hull surface area: 106 lbs/sq ft or 519 Kg/sq metre
    Hull strength (Relative):
        - Cross-sectional: 0,92
        - Longitudinal: 2,29
        - Overall: 1,00
    Hull space for machinery, storage, compartmentation is cramped
    Room for accommodation and workspaces is cramped
    Poor seaboat, wet and uncomfortable, reduced performance in heavy weather