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Dramaro

Super Alaska Report

May 27th, 2019
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  1. USS Super-Alaska, USA Battlecruiser laid down 1941
  2.  
  3. Displacement:
  4. 34,337 t light; 36,196 t standard; 39,669 t normal; 42,446 t full load
  5.  
  6. Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
  7. (812.54 ft / 795.50 ft) x 97.10 ft x (32.80 / 34.54 ft)
  8. (247.66 m / 242.47 m) x 29.60 m x (10.00 / 10.53 m)
  9.  
  10. Armament:
  11. 12 - 14.00" / 356 mm 50.0 cal guns - 1,500.00lbs / 680.39kg shells, 100 per gun
  12. Breech loading guns in turret on barbette mounts, 1941 Model
  13. 3 x 3-gun mounts on centreline ends, majority forward
  14. 1 raised mount - superfiring
  15. 12 - 5.00" / 127 mm 38.0 cal guns - 55.00lbs / 24.95kg shells, 150 per gun
  16. Breech loading guns in deck and hoist mounts, 1941 Model
  17. 6 x 2-gun mounts on sides, evenly spread
  18. 6 raised mounts
  19. 56 - 1.57" / 40.0 mm 60.0 cal guns - 2.14lbs / 0.97kg shells, 150 per gun
  20. Anti-air guns in deck mounts, 1941 Model
  21. 14 x Quad mounts on centreline, evenly spread
  22. 34 - 0.79" / 20.0 mm 60.0 cal guns - 0.27lbs / 0.12kg shells, 150 per gun
  23. Anti-air guns in deck mounts, 1941 Model
  24. 34 x Single mounts on centreline, evenly spread
  25. Weight of broadside 18,789 lbs / 8,522 kg
  26.  
  27. Armour:
  28. - Belts: Width (max) Length (avg) Height (avg)
  29. Main: 9.00" / 229 mm 397.75 ft / 121.23 m 11.82 ft / 3.60 m
  30. Ends: Unarmoured
  31. Main Belt covers 77 % of normal length
  32. Main belt does not fully cover magazines and engineering spaces
  33.  
  34. - Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
  35. Main: 12.8" / 325 mm 8.00" / 203 mm 13.0" / 330 mm
  36. 2nd: 1.00" / 25 mm 1.00" / 25 mm -
  37. 3rd: 0.50" / 13 mm - -
  38. 4th: 0.50" / 13 mm - -
  39.  
  40. - Armoured deck - multiple decks: 6.03" / 153 mm For and Aft decks
  41. Forecastle: 0.00" / 0 mm Quarter deck: 3.00" / 76 mm
  42.  
  43. - Conning towers: Forward 10.60" / 269 mm, Aft 0.00" / 0 mm
  44.  
  45. Machinery:
  46. Oil fired boilers, steam turbines,
  47. Geared drive, 4 shafts, 179,837 shp / 134,158 Kw = 33.00 kts
  48. Range 12,000nm at 15.00 kts
  49. Bunker at max displacement = 6,250 tons
  50.  
  51. Complement:
  52. 1,405 - 1,827
  53.  
  54. Cost:
  55. £23.132 million / $92.530 million
  56.  
  57. Distribution of weights at normal displacement:
  58. Armament: 4,226 tons, 10.7 %
  59. Armour: 10,371 tons, 26.1 %
  60. - Belts: 1,881 tons, 4.7 %
  61. - Armament: 3,317 tons, 8.4 %
  62. - Armour Deck: 4,907 tons, 12.4 %
  63. - Conning Tower: 266 tons, 0.7 %
  64. Machinery: 4,753 tons, 12.0 %
  65. Hull, fittings & equipment: 14,887 tons, 37.5 %
  66. Fuel, ammunition & stores: 5,331 tons, 13.4 %
  67. Miscellaneous weights: 100 tons, 0.3 %
  68. - Hull below water: 100 tons
  69.  
  70. Overall survivability and seakeeping ability:
  71. Survivability (Non-critical penetrating hits needed to sink ship):
  72. 46,980 lbs / 21,310 Kg = 34.2 x 14.0 " / 356 mm shells or 3.7 torpedoes
  73. Stability (Unstable if below 1.00): 1.00
  74. Metacentric height 4.8 ft / 1.5 m
  75. Roll period: 18.6 seconds
  76. Steadiness - As gun platform (Average = 50 %): 57 %
  77. - Recoil effect (Restricted arc if above 1.00): 1.00
  78. Seaboat quality (Average = 1.00): 1.01
  79.  
  80. Hull form characteristics:
  81. Hull has raised quarterdeck ,
  82. a normal bow and large transom stern
  83. Block coefficient (normal/deep): 0.548 / 0.557
  84. Length to Beam Ratio: 8.19 : 1
  85. 'Natural speed' for length: 32.52 kts
  86. Power going to wave formation at top speed: 55 %
  87. Trim (Max stability = 0, Max steadiness = 100): 56
  88. Bow angle (Positive = bow angles forward): 22.00 degrees
  89. Stern overhang: 3.30 ft / 1.01 m
  90. Freeboard (% = length of deck as a percentage of waterline length):
  91. Fore end, Aft end
  92. - Forecastle: 26.00 %, 34.00 ft / 10.36 m, 24.50 ft / 7.47 m
  93. - Forward deck: 18.00 %, 24.50 ft / 7.47 m, 22.50 ft / 6.86 m
  94. - Aft deck: 32.00 %, 22.50 ft / 6.86 m, 23.50 ft / 7.16 m
  95. - Quarter deck: 24.00 %, 24.50 ft / 7.47 m, 24.50 ft / 7.47 m
  96. - Average freeboard: 24.83 ft / 7.57 m
  97.  
  98. Ship space, strength and comments:
  99. Space - Hull below water (magazines/engines, low = better): 81.8 %
  100. - Above water (accommodation/working, high = better): 175.9 %
  101. Waterplane Area: 56,015 Square feet or 5,204 Square metres
  102. Displacement factor (Displacement / loading): 105 %
  103. Structure weight / hull surface area: 208 lbs/sq ft or 1,013 Kg/sq metre
  104. Hull strength (Relative):
  105. - Cross-sectional: 0.96
  106. - Longitudinal: 1.50
  107. - Overall: 1.00
  108. Hull space for machinery, storage, compartmentation is excellent
  109. Room for accommodation and workspaces is excellent
  110.  
  111. Additional Text
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