czwartek, 30 sierpnia 2012

Flota japońska w XIX w. - cz. II - 15.09.2011

C.d. propozycji dla MW Japonii. Ponieważ pancerniki i krążowniki to nie wszystko i do całej masy różnych innych zadań potrzeba różnych "drobnoustrojów" - proponuję dziś dwa kolejne typy okrętów: parowo-żaglową kanonierkę i  monitor do obrony portów.

Awashima, japanese gunboat laid down 1865

Displacement:
    743 t light; 777 t standard; 885 t normal; 972 t full load

Dimensions: Length overall / water x beam x draught
    147,34 ft / 141,96 ft x 33,56 ft x 12,43 ft (normal load)
    44,91 m / 43,27 m x 10,23 m  x 3,79 m

Armament:
      1 - 300pdr guns in single mounts, 1865 Model
      Smoothbore gun in deck mount
      on centreline amidships
      4 - 32pdr guns in single mounts, 1865 Model
      Smoothbore guns in broadside mounts
      on side, all aft
    Weight of broadside 364 lbs / 165 kg
    Shells per gun, main battery: 120

Machinery:
    Coal fired boilers, simple reciprocating steam engines,
    Direct drive, 1 shaft, 1 152 ihp / 860 Kw = 12,70 kts
    Range 2 600nm at 7,00 kts
    Bunker at max displacement = 194 tons (100% coal)

Complement:
    155

Cost:
    £0,093 million / $0,370 million

Distribution of weights at normal displacement:
    Armament: 29 tons, 3,3%
    Machinery: 301 tons, 34,1%
    Hull, fittings & equipment: 336 tons, 38,0%
    Fuel, ammunition & stores: 143 tons, 16,1%
    Miscellaneous weights: 76 tons, 8,6%

Overall survivability and seakeeping ability:
    Survivability (Non-critical penetrating hits needed to sink ship):
      297 lbs / 135 Kg = 2,3 x 7,5 " / 190 mm shells or 0,2 torpedoes
    Stability (Unstable if below 1.00): 1,37
    Metacentric height 1,7 ft / 0,5 m
    Roll period: 10,8 seconds
    Steadiness    - As gun platform (Average = 50 %): 80 %
            - Recoil effect (Restricted arc if above 1.00): 0,17
    Seaboat quality  (Average = 1.00): 1,61

Hull form characteristics:
    Hull has a flush deck
    Block coefficient: 0,523
    Length to Beam Ratio: 4,23 : 1
    'Natural speed' for length: 11,91 kts
    Power going to wave formation at top speed: 57 %
    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:        11,02 ft / 3,36 m
       - Forecastle (20%):    8,99 ft / 2,74 m
       - Mid (50%):        8,99 ft / 2,74 m
       - Quarterdeck (15%):    8,99 ft / 2,74 m
       - Stern:        9,48 ft / 2,89 m
       - Average freeboard:    9,19 ft / 2,80 m
    Ship tends to be wet forward

Ship space, strength and comments:
    Space    - Hull below water (magazines/engines, low = better): 144,3%
        - Above water (accommodation/working, high = better): 67,0%
    Waterplane Area: 3 130 Square feet or 291 Square metres
    Displacement factor (Displacement / loading): 94%
    Structure weight / hull surface area: 67 lbs/sq ft or 327 Kg/sq metre
    Hull strength (Relative):
        - Cross-sectional: 0,85
        - Longitudinal: 4,69
        - Overall: 1,01
    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:
Awashima (1865)
Iki (1865)
Mishima (1865)
Nakadori (1866)


Osumi, japanese monitor laid down 1866

Displacement:
    1 523 t light; 1 604 t standard; 1 709 t normal; 1 794 t full load

Dimensions: Length overall / water x beam x draught
    208,56 ft / 208,56 ft x 45,47 ft x 10,99 ft (normal load)
    63,57 m / 63,57 m x 13,86 m  x 3,35 m

Armament:
      2 - 10,98" / 279 mm guns in single mounts, 424,09lbs / 192,37kg shells, 1866 Model
      Muzzle loading guns in Coles/Ericsson turrets
      on centreline ends, evenly spread
    Weight of broadside 848 lbs / 385 kg
    Shells per gun, main battery: 100

Armour:
   - Belts:        Width (max)    Length (avg)        Height (avg)
    Main:    4,72" / 120 mm    181,17 ft / 55,22 m    4,76 ft / 1,45 m
    Ends:    2,99" / 76 mm      27,36 ft / 8,34 m    4,76 ft / 1,45 m
      Main Belt covers 134% of normal length

   - Gun armour:    Face (max)    Other gunhouse (avg)    Barbette/hoist (max)
    Main:    5,71" / 145 mm    3,50" / 89 mm              -

   - Armour deck: 1,46" / 37 mm, Conning tower: 5,51" / 140 mm

Machinery:
    Coal fired boilers, simple reciprocating steam engines,
    Direct drive, 1 shaft, 441 ihp / 329 Kw = 9,00 kts
    Range 2 350nm at 6,00 kts
    Bunker at max displacement = 190 tons (100% coal)

Complement:
    132 - 172

Cost:
    £0,159 million / $0,636 million

Distribution of weights at normal displacement:
    Armament: 106 tons, 6,2%
    Armour: 453 tons, 26,5%
       - Belts: 183 tons, 10,7%
       - Torpedo bulkhead: 0 tons, 0,0%
       - Armament: 76 tons, 4,5%
       - Armour Deck: 178 tons, 10,4%
       - Conning Tower: 17 tons, 1,0%
    Machinery: 119 tons, 6,9%
    Hull, fittings & equipment: 845 tons, 49,4%
    Fuel, ammunition & stores: 187 tons, 10,9%
    Miscellaneous weights: 0 tons, 0,0%

Overall survivability and seakeeping ability:
    Survivability (Non-critical penetrating hits needed to sink ship):
      1 304 lbs / 592 Kg = 3,1 x 11,0 " / 279 mm shells or 0,7 torpedoes
    Stability (Unstable if below 1.00): 1,52
    Metacentric height 3,1 ft / 1,0 m
    Roll period: 10,8 seconds
    Steadiness    - As gun platform (Average = 50 %): 24 %
            - Recoil effect (Restricted arc if above 1.00): 0,08
    Seaboat quality  (Average = 1.00): 0,23

Hull form characteristics:
    Hull has a flush deck
    Block coefficient: 0,574
    Length to Beam Ratio: 4,59 : 1
    'Natural speed' for length: 14,44 kts
    Power going to wave formation at top speed: 28 %
    Trim (Max stability = 0, Max steadiness = 100): 50
    Bow angle (Positive = bow angles forward): 0,00 degrees
    Stern overhang: 0,00 ft / 0,00 m
    Freeboard (% = measuring location as a percentage of overall length):
       - Stem:        0,00 ft / 0,00 m
       - Forecastle (20%):    3,12 ft / 0,95 m
       - Mid (50%):        3,12 ft / 0,95 m
       - Quarterdeck (15%):    3,12 ft / 0,95 m
       - Stern:        0,00 ft / 0,00 m
       - Average freeboard:    2,63 ft / 0,80 m
    Ship tends to be wet forward

Ship space, strength and comments:
    Space    - Hull below water (magazines/engines, low = better): 69,4%
        - Above water (accommodation/working, high = better): 29,7%
    Waterplane Area: 6 593 Square feet or 612 Square metres
    Displacement factor (Displacement / loading): 111%
    Structure weight / hull surface area: 111 lbs/sq ft or 543 Kg/sq metre
    Hull strength (Relative):
        - Cross-sectional: 1,00
        - Longitudinal: 1,01
        - Overall: 1,00
    Hull space for machinery, storage, compartmentation is excellent
    Room for accommodation and workspaces is extremely poor
    Ship has quick, lively roll, not a steady gun platform
    Caution: Lacks seaworthiness - very limited seakeeping ability

Okręty w typie:
Osumi (1866)
Satsunan (1867)
Goto (1867)

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