Duński POW z 1936 r.

W połowie  lat 30-tych Duńczycy zaczęli się przymierzać do budowy nowego (nowych?) okrętu obrony wybrzeża. Powstało kilka wstępnych projektów – okrętów liczących sobie od 4000 do 5730 ton wyporności, uzbrojonych w 4 działa 203 lub 254 mm i rozwijających 18-21 w. Poniżej prezentuję chyba najbardziej znany z nich (choćby dlatego, że są jego szkice), projekt A z maja 1936 r. Okręt o wyporności 5730 ton, uzbrojony w 4 działa 254 mm (zapewne Boforsa) i 6 dział 150 mm, rozwijający prędkość 20 w. i mający silnie ukosowany pancerz burtowy. Dalsze szczegóły projektu nie były mi znane, zatem są one dziełem mojej inwencji – szczegóły w raporcie poniżej;)  

Dannebrog, danish coast defence battleship laid down 1936 (Engine 1937)

Displacement:
    5 185 t light; 5 527 t standard; 5 734 t normal; 5 899 t full load

Dimensions: Length overall / water x beam x draught
    329,65 ft / 324,08 ft x 56,20 ft x 16,47 ft (normal load)
    100,48 m / 98,78 m x 17,13 m  x 5,02 m

Armament:
      4 - 10,00" / 254 mm guns (2x2 guns), 500,00lbs / 226,80kg shells, 1929 Model
      Breech loading guns in turrets (on barbettes)
      on centreline ends, evenly spread
      4 - 5,91" / 150 mm guns (2x2 guns), 102,98lbs / 46,71kg shells, 1923 Model
      Quick firing guns in turrets (on barbettes)
      on side, all amidships
      2 - 5,91" / 150 mm guns (1x2 guns), 102,98lbs / 46,71kg shells, 1923 Model
      Quick firing guns in a turret (on a barbette)
      on centreline aft, all raised guns - superfiring
      3 - 1,57" / 40,0 mm guns in single mounts, 1,95lbs / 0,88kg shells, 1932 Model
      Anti-aircraft guns in deck mounts
      on side, all amidships, all raised mounts - superfiring
      2 - 0,79" / 20,0 mm guns in single mounts, 0,24lbs / 0,11kg shells, 1932 Model
      Machine guns in deck mounts
      on side, all amidships, all raised mounts - superfiring
    Weight of broadside 2 624 lbs / 1 190 kg
    Shells per gun, main battery: 150

Armour:
   - Belts:        Width (max)    Length (avg)        Height (avg)
    Main:    7,87" / 200 mm    192,85 ft / 58,78 m    12,50 ft / 3,81 m
    Ends:    Unarmoured
      Main Belt covers 92% of normal length
      Main belt does not fully cover magazines and engineering spaces

   - Torpedo Bulkhead:
        1,57" / 40 mm    192,85 ft / 58,78 m    13,32 ft / 4,06 m

   - Gun armour:    Face (max)    Other gunhouse (avg)    Barbette/hoist (max)
    Main:    9,84" / 250 mm    7,87" / 200 mm        9,84" / 250 mm
    2nd:    2,36" / 60 mm    1,57" / 40 mm        2,36" / 60 mm
    3rd:    2,36" / 60 mm    1,57" / 40 mm        2,36" / 60 mm

   - Armour deck: 2,36" / 60 mm, Conning tower: 9,84" / 250 mm

Machinery:
    Oil fired boilers, steam turbines,
    Geared drive, 2 shafts, 13 446 shp / 10 031 Kw = 20,00 kts
    Range 3 500nm at 12,00 kts
    Bunker at max displacement = 372 tons

Complement:
    329 - 428

Cost:
    £2,685 million / $10,739 million

Distribution of weights at normal displacement:
    Armament: 328 tons, 5,7%
    Armour: 2 296 tons, 40,1%
       - Belts: 864 tons, 15,1%
       - Torpedo bulkhead: 150 tons, 2,6%
       - Armament: 594 tons, 10,4%
       - Armour Deck: 620 tons, 10,8%
       - Conning Tower: 68 tons, 1,2%
    Machinery: 373 tons, 6,5%
    Hull, fittings & equipment: 2 187 tons, 38,1%
    Fuel, ammunition & stores: 549 tons, 9,6%
    Miscellaneous weights: 0 tons, 0,0%

Overall survivability and seakeeping ability:
    Survivability (Non-critical penetrating hits needed to sink ship):
      8 579 lbs / 3 891 Kg = 17,2 x 10,0 " / 254 mm shells or 2,2 torpedoes
    Stability (Unstable if below 1.00): 1,09
    Metacentric height 2,5 ft / 0,8 m
    Roll period: 14,9 seconds
    Steadiness    - As gun platform (Average = 50 %): 44 %
            - Recoil effect (Restricted arc if above 1.00): 0,59
    Seaboat quality  (Average = 1.00): 0,78

Hull form characteristics:
    Hull has rise forward of midbreak
    Block coefficient: 0,669
    Length to Beam Ratio: 5,77 : 1
    'Natural speed' for length: 18,00 kts
    Power going to wave formation at top speed: 59 %
    Trim (Max stability = 0, Max steadiness = 100): 50
    Bow angle (Positive = bow angles forward): 10,00 degrees
    Stern overhang: 2,49 ft / 0,76 m
    Freeboard (% = measuring location as a percentage of overall length):
       - Stem:        17,45 ft / 5,32 m
       - Forecastle (24%):    15,45 ft / 4,71 m
       - Mid (57%):        14,96 ft / 4,56 m (8,46 ft / 2,58 m aft of break)
       - Quarterdeck (22%):    8,99 ft / 2,74 m
       - Stern:        9,48 ft / 2,89 m
       - Average freeboard:    12,78 ft / 3,89 m
    Ship tends to be wet forward

Ship space, strength and comments:
    Space    - Hull below water (magazines/engines, low = better): 102,5%
        - Above water (accommodation/working, high = better): 104,2%
    Waterplane Area: 14 197 Square feet or 1 319 Square metres
    Displacement factor (Displacement / loading): 101%
    Structure weight / hull surface area: 112 lbs/sq ft or 547 Kg/sq metre
    Hull strength (Relative):
        - Cross-sectional: 0,92
        - Longitudinal: 1,97
        - Overall: 1,00
    Hull space for machinery, storage, compartmentation is adequate
    Room for accommodation and workspaces is adequate
    Poor seaboat, wet and uncomfortable, reduced performance in heavy weather