Nowe niszczyciele

Dziś prezentuje kolejny typ niszczyciela. Aby zyskać nieco na prędkości w stosunku do poprzedniego typu a jednocześnie nie pogorszyć dzielności morskiej jednostki, konieczne jest dość znaczne zwiększenie wyporności – nowa jednostka jest największym tego typu okrętem w naszej flocie i plasuje się pod tym względem również w światowej czołówce. Oceną Springsharpa (Poor seaboat, wet and uncomfortable, reduced performance in heavy weather) bym się specjalnie nie przejmował, bo jak wiadomo – on nie lubi niszczycieli;)

Purga, polish destroyer laid down 1902

Displacement:
    393 t light; 408 t standard; 478 t normal; 533 t full load

Dimensions: Length overall / water x beam x draught
    226,15 ft / 225,66 ft x 22,67 ft x 7,74 ft (normal load)
    68,93 m / 68,78 m x 6,91 m  x 2,36 m

Armament:
      2 - 2,95" / 75,0 mm guns in single mounts, 12,87lbs / 5,84kg shells, 1891 Model
      Quick firing guns in deck mounts
      on centreline ends, evenly spread
      2 - 2,24" / 57,0 mm guns in single mounts, 5,23lbs / 2,37kg shells, 1885 Model
      Quick firing guns in deck mounts
      on side, all amidships
    Weight of broadside 36 lbs / 16 kg
    Shells per gun, main battery: 250
    2 - 18,0" / 457 mm above water torpedoes

Machinery:
    Coal fired boilers, complex reciprocating steam engines,
    Direct drive, 2 shafts, 8 676 ihp / 6 473 Kw = 26,40 kts
    Range 1 900nm at 12,50 kts
    Bunker at max displacement = 125 tons (100% coal)
      Caution: Delicate, lightweight machinery

Complement:
    50 - 66

Cost:
    £0,058 million / $0,232 million

Distribution of weights at normal displacement:
    Armament: 5 tons, 0,9%
    Machinery: 290 tons, 60,6%
    Hull, fittings & equipment: 99 tons, 20,7%
    Fuel, ammunition & stores: 84 tons, 17,7%
    Miscellaneous weights: 0 tons, 0,0%

Overall survivability and seakeeping ability:
    Survivability (Non-critical penetrating hits needed to sink ship):
      100 lbs / 45 Kg = 7,8 x 3,0 " / 75 mm shells or 0,1 torpedoes
    Stability (Unstable if below 1.00): 1,96
    Metacentric height 1,6 ft / 0,5 m
    Roll period: 7,6 seconds
    Steadiness    - As gun platform (Average = 50 %): 42 %
            - Recoil effect (Restricted arc if above 1.00): 0,05
    Seaboat quality  (Average = 1.00): 0,71

Hull form characteristics:
    Hull has rise forward of midbreak
    Block coefficient: 0,422
    Length to Beam Ratio: 9,95 : 1
    'Natural speed' for length: 15,02 kts
    Power going to wave formation at top speed: 66 %
    Trim (Max stability = 0, Max steadiness = 100): 50
    Bow angle (Positive = bow angles forward): -4,00 degrees
    Stern overhang: 0,49 ft / 0,15 m
    Freeboard (% = measuring location as a percentage of overall length):
       - Stem:        12,99 ft / 3,96 m
       - Forecastle (19%):    12,50 ft / 3,81 m
       - Mid (27%):        12,50 ft / 3,81 m (6,92 ft / 2,11 m aft of break)
       - Quarterdeck (13%):    6,92 ft / 2,11 m
       - Stern:        6,92 ft / 2,11 m
       - Average freeboard:    8,47 ft / 2,58 m
    Ship tends to be wet forward

Ship space, strength and comments:
    Space    - Hull below water (magazines/engines, low = better): 203,3%
        - Above water (accommodation/working, high = better): 74,2%
    Waterplane Area: 3 194 Square feet or 297 Square metres
    Displacement factor (Displacement / loading): 18%
    Structure weight / hull surface area: 18 lbs/sq ft or 86 Kg/sq metre
    Hull strength (Relative):
        - Cross-sectional: 0,46
        - Longitudinal: 1,03
        - Overall: 0,50
    Hull space for machinery, storage, compartmentation is extremely poor
    Room for accommodation and workspaces is cramped
    Poor seaboat, wet and uncomfortable, reduced performance in heavy weather

Purga (1902)
Zefir (1902)
Mistral (1903)
Buran (1903)