Nowa kanonierka rzeczna

Coś dawno nasza flotylla rzeczna nie otrzymała żadnego nowego okrętu. Czas nadrobić tę zaległość. Proponowaną jednostką będzie kanonierka wzorowana na morskich kanonierkach typu flat-iron – tutaj oczywiście w znacznie mniejszej skali. Mimo mniejszych rozmiarów, okręt ten i tak stanowi postęp w stosunku do poprzedniego typu kanonierek rzecznych, pochodzącego z lat 60-tych, napędzanego kołami bocznymi i uzbrojonego w odprzodowe działa gładkolufowe..

Czarna Hańcza, polish river gunboat laid down 1877

Displacement:
    32 t light; 34 t standard; 36 t normal; 38 t full load

Dimensions: Length overall / water x beam x draught
    58,14 ft / 57,15 ft x 16,27 ft x 2,56 ft (normal load)
    17,72 m / 17,42 m x 4,96 m  x 0,78 m

Armament:
      1 - 3,43" / 87,0 mm guns in single mounts, 16,17lbs / 7,33kg shells, 1877 Model
      Breech loading gun in deck mount
      on bow with limited arc
      Main guns limited to end-on fire
    Weight of broadside 16 lbs / 7 kg
    Shells per gun, main battery: 140

Machinery:
    Coal fired boilers, simple reciprocating steam engines,
    Direct drive, 1 shaft, 56 ihp / 42 Kw = 9,00 kts
    Range 550nm at 6,00 kts
    Bunker at max displacement = 3 tons (100% coal)

Complement:
    6 - 9

Cost:
    £0,004 million / $0,018 million

Distribution of weights at normal displacement:
    Armament: 2 tons, 5,6%
    Machinery: 11 tons, 30,5%
    Hull, fittings & equipment: 19 tons, 53,5%
    Fuel, ammunition & stores: 4 tons, 10,4%
    Miscellaneous weights: 0 tons, 0,0%

Overall survivability and seakeeping ability:
    Survivability (Non-critical penetrating hits needed to sink ship):
      28 lbs / 13 Kg = 1,7 x 3,4 " / 87 mm shells or 0,1 torpedoes
    Stability (Unstable if below 1.00): 1,58
    Metacentric height 0,7 ft / 0,2 m
    Roll period: 8,1 seconds
    Steadiness    - As gun platform (Average = 50 %): 51 %
            - Recoil effect (Restricted arc if above 1.00): 0,10
    Seaboat quality  (Average = 1.00): 1,02

Hull form characteristics:
    Hull has low forecastle
    Block coefficient: 0,532
    Length to Beam Ratio: 3,51 : 1
    'Natural speed' for length: 7,56 kts
    Power going to wave formation at top speed: 59 %
    Trim (Max stability = 0, Max steadiness = 100): 50
    Bow angle (Positive = bow angles forward): -62,00 degrees
    Stern overhang: 0,98 ft / 0,30 m
    Freeboard (% = measuring location as a percentage of overall length):
       - Stem:        3,48 ft / 1,06 m
       - Forecastle (18%):    3,48 ft / 1,06 m (6,50 ft / 1,98 m aft of break)
       - Mid (50%):        3,48 ft / 1,06 m
       - Quarterdeck (19%):    3,48 ft / 1,06 m
       - Stern:        4,00 ft / 1,22 m
       - Average freeboard:    4,01 ft / 1,22 m
    Ship tends to be wet forward

Ship space, strength and comments:
    Space    - Hull below water (magazines/engines, low = better): 141,1%
        - Above water (accommodation/working, high = better): 83,1%
    Waterplane Area: 617 Square feet or 57 Square metres
    Displacement factor (Displacement / loading): 89%
    Structure weight / hull surface area: 24 lbs/sq ft or 116 Kg/sq metre
    Hull strength (Relative):
        - Cross-sectional: 0,84
        - Longitudinal: 4,63
        - Overall: 1,00
    Hull space for machinery, storage, compartmentation is cramped
    Room for accommodation and workspaces is cramped

Czarna Hańcza (1877)
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Wieprz (1877)
Biebrza (1877)
Skroda (1878)
Rozoga(1878)
Szkwa (1878)
Rospuda (1878)
Skrwa (1879)
Kamienna (1879)
Nida (1879)
Bystrzyca (1879)