czwartek, 30 sierpnia 2012

Japoński pancernik wieżowy - 06.10.2011

Dziś prezentuję projekt kolejnego pancernika dla MW Japonii - jest to wieżowy okręt z pełnym ożaglowaniem - nieco przypomina brytyjskiego Monarcha, od którego jest wprawdzie słabiej uzbrojony, za to lepiej opancerzony. Niemniej, taki kształt okrętu pod koniec lat 70-tych nie stanowi już "ostatniego krzyku" techniki, więc trzeba będzie pomyśleć o jakimś następcy;-)

Iwashiro, japanese battleship laid down 1877 (Engine 1879)

Displacement:
    6 063 t light; 6 324 t standard; 6 781 t normal; 7 146 t full load

Dimensions: Length overall / water x beam x draught
    296,95 ft / 294,46 ft x 59,78 ft x 23,65 ft (normal load)
    90,51 m / 89,75 m x 18,22 m  x 7,21 m

Armament:
      4 - 11,02" / 280 mm guns in single mounts, 539,19lbs / 244,57kg shells, 1877 Model
      Breech loading guns in Coles/Ericsson turrets
      on side, all amidships
      16 - 2,24" / 57,0 mm guns in single mounts, 4,55lbs / 2,06kg shells, 1877 Model
      Breech loading guns in deck mounts
      on side, evenly spread
    Weight of broadside 2 230 lbs / 1 011 kg
    Shells per gun, main battery: 100
    2 - 14,0" / 356 mm above water torpedoes

Armour:
   - Belts:        Width (max)    Length (avg)        Height (avg)
    Main:    11,2" / 285 mm    164,83 ft / 50,24 m    9,12 ft / 2,78 m
    Ends:    5,00" / 127 mm    102,49 ft / 31,24 m    7,09 ft / 2,16 m
      27,13 ft / 8,27 m Unarmoured ends
      Main Belt covers 86% of normal length

   - Gun armour:    Face (max)    Other gunhouse (avg)    Barbette/hoist (max)
    Main:    11,0" / 280 mm    5,51" / 140 mm              -

   - Armour deck: 1,06" / 27 mm, Conning tower: 2,99" / 76 mm

Machinery:
    Coal fired boilers, simple reciprocating steam engines,
    Direct drive, 1 shaft, 3 091 ihp / 2 306 Kw = 13,00 kts
    Range 3 500nm at 8,50 kts
    Bunker at max displacement = 822 tons (100% coal)

Complement:
    709

Cost:
    £0,537 million / $2,148 million

Distribution of weights at normal displacement:
    Armament: 279 tons, 4,1%
    Armour: 2 072 tons, 30,6%
       - Belts: 927 tons, 13,7%
       - Torpedo bulkhead: 0 tons, 0,0%
       - Armament: 882 tons, 13,0%
       - Armour Deck: 240 tons, 3,5%
       - Conning Tower: 23 tons, 0,3%
    Machinery: 648 tons, 9,5%
    Hull, fittings & equipment: 2 464 tons, 36,3%
    Fuel, ammunition & stores: 718 tons, 10,6%
    Miscellaneous weights: 601 tons, 8,9%

Overall survivability and seakeeping ability:
    Survivability (Non-critical penetrating hits needed to sink ship):
      6 140 lbs / 2 785 Kg = 11,4 x 11,0 " / 280 mm shells or 1,4 torpedoes
    Stability (Unstable if below 1.00): 1,01
    Metacentric height 2,3 ft / 0,7 m
    Roll period: 16,4 seconds
    Steadiness    - As gun platform (Average = 50 %): 63 %
            - Recoil effect (Restricted arc if above 1.00): 0,45
    Seaboat quality  (Average = 1.00): 1,58

Hull form characteristics:
    Hull has a flush deck
    Block coefficient: 0,570
    Length to Beam Ratio: 4,93 : 1
    'Natural speed' for length: 17,16 kts
    Power going to wave formation at top speed: 39 %
    Trim (Max stability = 0, Max steadiness = 100): 40
    Bow angle (Positive = bow angles forward): -2,00 degrees
    Stern overhang: 2,49 ft / 0,76 m
    Freeboard (% = measuring location as a percentage of overall length):
       - Stem:        13,52 ft / 4,12 m
       - Forecastle (20%):    12,01 ft / 3,66 m
       - Mid (50%):        12,01 ft / 3,66 m
       - Quarterdeck (15%):    12,01 ft / 3,66 m
       - Stern:        12,01 ft / 3,66 m
       - Average freeboard:    12,13 ft / 3,70 m
    Ship tends to be wet forward

Ship space, strength and comments:
    Space    - Hull below water (magazines/engines, low = better): 72,0%
        - Above water (accommodation/working, high = better): 72,1%
    Waterplane Area: 12 182 Square feet or 1 132 Square metres
    Displacement factor (Displacement / loading): 109%
    Structure weight / hull surface area: 134 lbs/sq ft or 654 Kg/sq metre
    Hull strength (Relative):
        - Cross-sectional: 0,89
        - Longitudinal: 2,80
        - Overall: 1,00
    Hull space for machinery, storage, compartmentation is excellent
    Room for accommodation and workspaces is cramped
    Excellent seaboat, comfortable, can fire her guns in the heaviest weather

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