środa, 29 sierpnia 2012

POW dla Japonii - 26.05.2010

Następca monitorów z poprzedniego postu - pancernik obrony wybrzeża z końca lat 70-tych XIX w.
 
Yamashiro, japanese coastal battleship laid down 1876 (Engine 1877)

Displacement:
    2 081 t light; 2 201 t standard; 2 275 t normal; 2 333 t full load

Dimensions: Length overall / water x beam x draught
    220,14 ft / 220,14 ft x 42,65 ft x 14,11 ft (normal load)
    67,10 m / 67,10 m x 13,00 m  x 4,30 m

Armament:
      4 - 8,27" / 210 mm guns in single mounts, 223,23lbs / 101,26kg shells, 1876 Model
      Muzzle loading guns in Coles/Ericsson turrets
      on centreline ends, evenly spread
    Weight of broadside 893 lbs / 405 kg
    Shells per gun, main battery: 150

Armour:
   - Belts:        Width (max)    Length (avg)        Height (avg)
    Main:    9,65" / 245 mm      88,58 ft / 27,00 m    6,89 ft / 2,10 m
    Ends:    Unarmoured
      Main Belt covers 62% of normal length
      Main belt does not fully cover magazines and engineering spaces

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

   - Armour deck: 0,79" / 20 mm, Conning tower: 7,99" / 203 mm

Machinery:
    Coal fired boilers, simple reciprocating steam engines,
    Direct drive, 2 shafts, 1 111 ihp / 829 Kw = 11,50 kts
    Range 2 000nm at 6,00 kts
    Bunker at max displacement = 132 tons (100% coal)

Complement:
    164 - 214

Cost:
    £0,200 million / $0,801 million

Distribution of weights at normal displacement:
    Armament: 112 tons, 4,9%
    Armour: 775 tons, 34,1%
       - Belts: 307 tons, 13,5%
       - Torpedo bulkhead: 0 tons, 0,0%
       - Armament: 339 tons, 14,9%
       - Armour Deck: 100 tons, 4,4%
       - Conning Tower: 30 tons, 1,3%
    Machinery: 240 tons, 10,5%
    Hull, fittings & equipment: 955 tons, 42,0%
    Fuel, ammunition & stores: 193 tons, 8,5%
    Miscellaneous weights: 0 tons, 0,0%

Overall survivability and seakeeping ability:
    Survivability (Non-critical penetrating hits needed to sink ship):
      2 152 lbs / 976 Kg = 9,6 x 8,3 " / 210 mm shells or 0,8 torpedoes
    Stability (Unstable if below 1.00): 1,03
    Metacentric height 1,5 ft / 0,5 m
    Roll period: 14,7 seconds
    Steadiness    - As gun platform (Average = 50 %): 71 %
            - Recoil effect (Restricted arc if above 1.00): 0,52
    Seaboat quality  (Average = 1.00): 1,42

Hull form characteristics:
    Hull has a flush deck
    Block coefficient: 0,601
    Length to Beam Ratio: 5,16 : 1
    'Natural speed' for length: 14,84 kts
    Power going to wave formation at top speed: 39 %
    Trim (Max stability = 0, Max steadiness = 100): 50
    Bow angle (Positive = bow angles forward): -16,00 degrees
    Stern overhang: 0,00 ft / 0,00 m
    Freeboard (% = measuring location as a percentage of overall length):
       - Stem:        8,37 ft / 2,55 m
       - Forecastle (20%):    8,37 ft / 2,55 m
       - Mid (50%):        8,37 ft / 2,55 m
       - Quarterdeck (15%):    8,37 ft / 2,55 m
       - Stern:        8,37 ft / 2,55 m
       - Average freeboard:    8,37 ft / 2,55 m
    Ship tends to be wet forward

Ship space, strength and comments:
    Space    - Hull below water (magazines/engines, low = better): 72,7%
        - Above water (accommodation/working, high = better): 66,8%
    Waterplane Area: 6 874 Square feet or 639 Square metres
    Displacement factor (Displacement / loading): 106%
    Structure weight / hull surface area: 100 lbs/sq ft or 486 Kg/sq metre
    Hull strength (Relative):
        - Cross-sectional: 0,91
        - Longitudinal: 2,19
        - Overall: 1,00
    Hull space for machinery, storage, compartmentation is excellent
    Room for accommodation and workspaces is cramped
    Ship has slow, easy roll, a good, steady gun platform
    Good seaboat, rides out heavy weather easily

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