Flota japońska w XIX w. - cz. V - 19.09.2011

Kolejne typy okrętów dla MW Japonii - taranowiec i korweta. Taranowiec to jednostka eksperymentalna, uzbrojona w jedno działo i taran, posiadająca szczątkowe opancerzenie pokładów, za to sporą prędkość. Korweta natomaist to rozwinięcie poprzedniego typu Chikuma - okręt został nieco powiększony i wyposażony w  nowocześniejszą artylerię.

Tokiwa, japanese ram laid down 1869 (Engine 1870)

Displacement:
    1 859 t light; 1 917 t standard; 2 330 t normal; 2 661 t full load

Dimensions: Length overall / water x beam x draught
    252,49 ft / 252,49 ft x 37,47 ft x 15,62 ft (normal load)
    76,96 m / 76,96 m x 11,42 m  x 4,76 m

Armament:
      1 - 9,02" / 229 mm guns in single mounts, 251,00lbs / 113,85kg shells, 1869 Model
      Muzzle loading gun in casemate mount
      on bow with limited arc
      1 gun in hull casemate - Limited use in any sea
      Main guns limited to end-on fire
    Weight of broadside 251 lbs / 114 kg
    Shells per gun, main battery: 80

Armour:

   - Armour deck: 1,77" / 45 mm, Conning tower: 2,01" / 51 mm

Machinery:
    Coal fired boilers, simple reciprocating steam engines,
    Direct drive, 1 shaft, 3 511 ihp / 2 619 Kw = 15,60 kts
    Range 3 050nm at 10,00 kts
    Bunker at max displacement = 744 tons (100% coal)

Complement:
    166 - 217

Cost:
    £0,212 million / $0,848 million

Distribution of weights at normal displacement:
    Armament: 31 tons, 1,3%
    Armour: 218 tons, 9,4%
       - Belts: 0 tons, 0,0%
       - Torpedo bulkhead: 0 tons, 0,0%
       - Armament: 0 tons, 0,0%
       - Armour Deck: 210 tons, 9,0%
       - Conning Tower: 8 tons, 0,3%
    Machinery: 860 tons, 36,9%
    Hull, fittings & equipment: 749 tons, 32,2%
    Fuel, ammunition & stores: 471 tons, 20,2%
    Miscellaneous weights: 0 tons, 0,0%

Overall survivability and seakeeping ability:
    Survivability (Non-critical penetrating hits needed to sink ship):
      1 076 lbs / 488 Kg = 4,3 x 9,0 " / 229 mm shells or 0,3 torpedoes
    Stability (Unstable if below 1.00): 1,70
    Metacentric height 2,7 ft / 0,8 m
    Roll period: 9,5 seconds
    Steadiness    - As gun platform (Average = 50 %): 83 %
            - Recoil effect (Restricted arc if above 1.00): 0,06
    Seaboat quality  (Average = 1.00): 1,66

Hull form characteristics:
    Hull has a flush deck
    Block coefficient: 0,552
    Length to Beam Ratio: 6,74 : 1
    'Natural speed' for length: 15,89 kts
    Power going to wave formation at top speed: 47 %
    Trim (Max stability = 0, Max steadiness = 100): 50
    Bow angle (Positive = bow angles forward): -9,00 degrees
    Stern overhang: 0,00 ft / 0,00 m
    Freeboard (% = measuring location as a percentage of overall length):
       - Stem:        9,42 ft / 2,87 m
       - Forecastle (20%):    9,42 ft / 2,87 m
       - Mid (50%):        9,42 ft / 2,87 m
       - Quarterdeck (15%):    9,42 ft / 2,87 m
       - Stern:        9,42 ft / 2,87 m
       - Average freeboard:    9,42 ft / 2,87 m
    Ship tends to be wet forward

Ship space, strength and comments:
    Space    - Hull below water (magazines/engines, low = better): 129,7%
        - Above water (accommodation/working, high = better): 69,3%
    Waterplane Area: 6 417 Square feet or 596 Square metres
    Displacement factor (Displacement / loading): 106%
    Structure weight / hull surface area: 73 lbs/sq ft or 355 Kg/sq metre
    Hull strength (Relative):
        - Cross-sectional: 0,93
        - Longitudinal: 1,87
        - Overall: 1,00
    Hull space for machinery, storage, compartmentation is cramped
    Room for accommodation and workspaces is cramped
    Ship has slow, easy roll, a good, steady gun platform
    Excellent seaboat, comfortable, can fire her guns in the heaviest weather


Kushiro, japanese corvette laid down 1870

Displacement:
    1 506 t light; 1 596 t standard; 1 871 t normal; 2 090 t full load

Dimensions: Length overall / water x beam x draught
    212,89 ft / 212,89 ft x 33,99 ft x 16,60 ft (normal load)
    64,89 m / 64,89 m x 10,36 m  x 5,06 m

Armament:
      8 - 7,01" / 178 mm guns in single mounts, 120,46lbs / 54,64kg shells, 1870 Model
      Muzzle loading guns in broadside mounts
      on side, evenly spread
      8 guns on gundeck (upper belt level) - Limited use in all but light seas
    Weight of broadside 964 lbs / 437 kg
    Shells per gun, main battery: 100

Machinery:
    Coal fired boilers, simple reciprocating steam engines,
    Direct drive, 1 shaft, 2 145 ihp / 1 600 Kw = 14,00 kts
    Range 2 950nm at 9,00 kts
    Bunker at max displacement = 493 tons (100% coal)

Complement:
    270

Cost:
    £0,224 million / $0,897 million

Distribution of weights at normal displacement:
    Armament: 120 tons, 6,4%
    Machinery: 502 tons, 26,8%
    Hull, fittings & equipment: 883 tons, 47,2%
    Fuel, ammunition & stores: 365 tons, 19,5%
    Miscellaneous weights: 0 tons, 0,0%

Overall survivability and seakeeping ability:
    Survivability (Non-critical penetrating hits needed to sink ship):
      884 lbs / 401 Kg = 7,3 x 7,0 " / 178 mm shells or 0,3 torpedoes
    Stability (Unstable if below 1.00): 1,49
    Metacentric height 2,0 ft / 0,6 m
    Roll period: 10,2 seconds
    Steadiness    - As gun platform (Average = 50 %): 100 %
            - Recoil effect (Restricted arc if above 1.00): 0,54
    Seaboat quality  (Average = 1.00): 2,00

Hull form characteristics:
    Hull has a flush deck
    Block coefficient: 0,545
    Length to Beam Ratio: 6,26 : 1
    'Natural speed' for length: 14,59 kts
    Power going to wave formation at top speed: 47 %
    Trim (Max stability = 0, Max steadiness = 100): 50
    Bow angle (Positive = bow angles forward): -8,00 degrees
    Stern overhang: 0,00 ft / 0,00 m
    Freeboard (% = measuring location as a percentage of overall length):
       - Stem:        13,85 ft / 4,22 m
       - Forecastle (20%):    12,17 ft / 3,71 m
       - Mid (50%):        12,17 ft / 3,71 m
       - Quarterdeck (15%):    12,17 ft / 3,71 m
       - Stern:        13,02 ft / 3,97 m
       - Average freeboard:    12,37 ft / 3,77 m
    Ship tends to be wet forward

Ship space, strength and comments:
    Space    - Hull below water (magazines/engines, low = better): 134,6%
        - Above water (accommodation/working, high = better): 80,1%
    Waterplane Area: 4 871 Square feet or 452 Square metres
    Displacement factor (Displacement / loading): 93%
    Structure weight / hull surface area: 96 lbs/sq ft or 470 Kg/sq metre
    Hull strength (Relative):
        - Cross-sectional: 1,08
        - Longitudinal: 5,36
        - Overall: 1,27
    Hull space for machinery, storage, compartmentation is cramped
    Room for accommodation and workspaces is cramped
    Ship has slow, easy roll, a good, steady gun platform
    Excellent seaboat, comfortable, can fire her guns in the heaviest weather

Okręty w typie:
Kushiro (1870)
Kiso (1870)
Kitakami (1871)
Ochibori (1871)