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1885-Class PCR Protected Cruiser, 1900 Refit [1900] (Calder)

Sep 28th, 2020
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  1. 1885-Class PCR (1900 Refit), Calder Republic Protected Cruiser laid down 1885
  2.  
  3. Displacement:
  4. 4,904 t light; 5,150 t standard; 5,911 t normal; 6,520 t full load
  5.  
  6. Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
  7. (365.81 ft / 360.89 ft) x 59.06 ft x (18.04 / 19.49 ft)
  8. (111.50 m / 110.00 m) x 18.00 m x (5.50 / 5.94 m)
  9.  
  10. Armament:
  11. 1 - 12.01" / 305 mm 40.0 cal gun - 797.98lbs / 361.96kg shells, 80 per gun
  12. Breech loading gun in turret on barbette mount, 1885 Model
  13. 1 x Single mount on centreline, forward deck centre
  14. 2 - 5.12" / 130 mm 47.0 cal guns - 69.73lbs / 31.63kg shells, 200 per gun
  15. Breech loading guns in turret on barbette mount, 1900 Model
  16. 1 x Twin mount on centreline, aft deck centre
  17. 10 - 5.12" / 130 mm 47.0 cal guns - 69.73lbs / 31.63kg shells, 200 per gun
  18. Quick firing guns in casemate mounts, 1900 Model
  19. 10 x Single mounts on sides, evenly spread
  20. Weight of broadside 1,635 lbs / 742 kg
  21. Main Torpedoes
  22. 2 - 17.7" / 450 mm, 13.12 ft / 4.00 m torpedoes - 0.274 t each, 0.548 t total
  23. submerged bow & stern tubes
  24. 2nd Torpedoes
  25. 2 - 17.7" / 450 mm, 13.12 ft / 4.00 m torpedoes - 0.274 t each, 0.548 t total
  26. below water reloads
  27.  
  28. Armour:
  29. - Belts: Width (max) Length (avg) Height (avg)
  30. Ends: Unarmoured
  31.  
  32. - Torpedo Bulkhead - Strengthened structural bulkheads:
  33. 0.79" / 20 mm 269.03 ft / 82.00 m 16.57 ft / 5.05 m
  34. Beam between torpedo bulkheads 55.77 ft / 17.00 m
  35.  
  36. - Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
  37. Main: 11.0" / 280 mm 5.91" / 150 mm 7.09" / 180 mm
  38. 2nd: 5.91" / 150 mm 2.95" / 75 mm 3.94" / 100 mm
  39. 3rd: 1.97" / 50 mm - 3.94" / 100 mm
  40.  
  41. - Protected deck - single deck:
  42. For and Aft decks: 1.97" / 50 mm
  43. Forecastle: 1.97" / 50 mm Quarter deck: 1.97" / 50 mm
  44.  
  45. - Conning towers: Forward 7.87" / 200 mm, Aft 0.00" / 0 mm
  46.  
  47. Machinery:
  48. Coal fired boilers, complex reciprocating steam engines,
  49. Direct drive, 2 shafts, 8,531 ihp / 6,364 Kw = 18.00 kts
  50. Range 5,500nm at 10.00 kts
  51. Bunker at max displacement = 1,370 tons (100% coal)
  52.  
  53. Complement:
  54. 336 - 438
  55.  
  56. Cost:
  57. £0.518 million / $2.074 million
  58.  
  59. Distribution of weights at normal displacement:
  60. Armament: 316 tons, 5.4 %
  61. - Guns: 315 tons, 5.3 %
  62. - Weapons: 2 tons, 0.0 %
  63. Armour: 964 tons, 16.3 %
  64. - Torpedo bulkhead: 130 tons, 2.2 %
  65. - Armament: 239 tons, 4.0 %
  66. - Armour Deck: 540 tons, 9.1 %
  67. - Conning Tower: 55 tons, 0.9 %
  68. Machinery: 1,658 tons, 28.0 %
  69. Hull, fittings & equipment: 1,965 tons, 33.2 %
  70. Fuel, ammunition & stores: 1,008 tons, 17.0 %
  71. Miscellaneous weights: 0 tons, 0.0 %
  72.  
  73. Overall survivability and seakeeping ability:
  74. Survivability (Non-critical penetrating hits needed to sink ship):
  75. 5,449 lbs / 2,472 Kg = 6.8 x 12.0 " / 305 mm shells or 5.8 torpedoes
  76. Stability (Unstable if below 1.00): 1.58
  77. Metacentric height 4.9 ft / 1.5 m
  78. Roll period: 11.2 seconds
  79. Steadiness - As gun platform (Average = 50 %): 96 %
  80. - Recoil effect (Restricted arc if above 1.00): 0.28
  81. Seaboat quality (Average = 1.00): 1.91
  82.  
  83. Hull form characteristics:
  84. Hull has raised forecastle,
  85. a ram bow and a cruiser stern
  86. Block coefficient (normal/deep): 0.538 / 0.549
  87. Length to Beam Ratio: 6.11 : 1
  88. 'Natural speed' for length: 19.00 kts
  89. Power going to wave formation at top speed: 46 %
  90. Trim (Max stability = 0, Max steadiness = 100): 50
  91. Bow angle (Positive = bow angles forward): -30.00 degrees
  92. Stern overhang: -6.56 ft / -2.00 m
  93. Freeboard (% = length of deck as a percentage of waterline length):
  94. Fore end, Aft end
  95. - Forecastle: 20.00 %, 19.69 ft / 6.00 m, 19.69 ft / 6.00 m
  96. - Forward deck: 30.00 %, 13.12 ft / 4.00 m, 13.12 ft / 4.00 m
  97. - Aft deck: 35.00 %, 13.12 ft / 4.00 m, 13.12 ft / 4.00 m
  98. - Quarter deck: 15.00 %, 13.12 ft / 4.00 m, 13.12 ft / 4.00 m
  99. - Average freeboard: 14.44 ft / 4.40 m
  100. Ship tends to be wet forward
  101.  
  102. Ship space, strength and comments:
  103. Space - Hull below water (magazines/engines, low = better): 116.9 %
  104. - Above water (accommodation/working, high = better): 109.4 %
  105. Waterplane Area: 14,708 Square feet or 1,366 Square metres
  106. Displacement factor (Displacement / loading): 110 %
  107. Structure weight / hull surface area: 107 lbs/sq ft or 521 Kg/sq metre
  108. Hull strength (Relative):
  109. - Cross-sectional: 0.93
  110. - Longitudinal: 2.04
  111. - Overall: 1.00
  112. Cramped machinery, storage, compartmentation space
  113. Adequate accommodation and workspace room
  114. Ship has slow, easy roll, a good, steady gun platform
  115. Excellent seaboat, comfortable, can fire her guns in the heaviest weather
  116.  
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