Armored Cruisers

[KWorld]

Armored Cruisers of the USN.

[KWorld]

USS New York City, United States Armored Cruiser laid down 1895

USS New York City
USS Wilmington

Displacement:
   7,449 t light; 7,715 t standard; 8,290 t normal; 8,751 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (394.80 ft / 384.00 ft) x 65.00 ft x (23.25 / 24.22 ft)
   (120.34 m / 117.04 m) x 19.81 m  x (7.09 / 7.38 m)

Armament:
      4 - 8.00" / 203 mm 40.0 cal guns - 259.99lbs / 117.93kg shells, 80 per gun
     Breech loading guns in turret on barbette mounts, 1895 Model
     2 x Twin mounts on centreline ends, evenly spread
      14 - 4.00" / 102 mm 40.0 cal guns - 33.00lbs / 14.97kg shells, 180 per gun
     Quick firing guns in casemate mounts, 1895 Model
     14 x Single mounts on sides, evenly spread
      10 hull mounts in casemates- Limited use in all but light seas
      8 - 2.24" / 57.0 mm 45.0 cal guns - 5.71lbs / 2.59kg shells, 300 per gun
     Quick firing guns in deck mounts, 1895 Model
     8 x Single mounts on sides, evenly spread
      8 raised mounts
      Weight of broadside 1,548 lbs / 702 kg

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   6.00" / 152 mm   276.48 ft / 84.27 m   12.00 ft / 3.66 m
   Ends:   4.00" / 102 mm   107.50 ft / 32.77 m   12.00 ft / 3.66 m
   Upper:   4.00" / 102 mm   276.48 ft / 84.27 m   8.00 ft / 2.44 m
     Main Belt covers 111 % of normal length

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   6.50" / 165 mm   4.00" / 102 mm      5.00" / 127 mm
   2nd:   4.00" / 102 mm         -               -

   - Armoured deck - single deck:
   For and Aft decks: 2.00" / 51 mm
   Forecastle: 2.00" / 51 mm  Quarter deck: 2.00" / 51 mm

   - Conning towers: Forward 6.00" / 152 mm, Aft 0.00" / 0 mm

Machinery:
   Coal fired boilers, complex reciprocating steam engines,
   Direct drive, 2 shafts, 14,527 ihp / 10,837 Kw = 20.00 kts
   Range 4,250nm at 10.00 kts
   Bunker at max displacement = 1,036 tons (100% coal)

Complement:
   433 - 564

Cost:
   £0.708 million / $2.833 million

Distribution of weights at normal displacement:
   Armament: 273 tons, 3.3 %
      - Guns: 273 tons, 3.3 %
   Armour: 2,374 tons, 28.6 %
      - Belts: 1,413 tons, 17.0 %
      - Armament: 288 tons, 3.5 %
      - Armour Deck: 621 tons, 7.5 %
      - Conning Tower: 53 tons, 0.6 %
   Machinery: 2,462 tons, 29.7 %
   Hull, fittings & equipment: 2,332 tons, 28.1 %
   Fuel, ammunition & stores: 841 tons, 10.1 %
   Miscellaneous weights: 7 tons, 0.1 %
      - Hull below water: 7 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     8,058 lbs / 3,655 Kg = 31.5 x 8.0 " / 203 mm shells or 1.3 torpedoes
   Stability (Unstable if below 1.00): 1.51
   Metacentric height 5.3 ft / 1.6 m
   Roll period: 11.9 seconds
   Steadiness   - As gun platform (Average = 50 %): 77 %
         - Recoil effect (Restricted arc if above 1.00): 0.17
   Seaboat quality  (Average = 1.00): 1.55

Hull form characteristics:
   Hull has a flush deck,
     a ram bow and a cruiser stern
   Block coefficient (normal/deep): 0.500 / 0.507
   Length to Beam Ratio: 5.91 : 1
   'Natural speed' for length: 19.60 kts
   Power going to wave formation at top speed: 50 %
   Trim (Max stability = 0, Max steadiness = 100): 50
   Bow angle (Positive = bow angles forward): -10.00 degrees
   Stern overhang: 3.80 ft / 1.16 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
      - Forecastle:   18.00 %,  15.00 ft / 4.57 m,  15.00 ft / 4.57 m
      - Forward deck:   30.00 %,  15.00 ft / 4.57 m,  15.00 ft / 4.57 m
      - Aft deck:   42.00 %,  15.00 ft / 4.57 m,  15.00 ft / 4.57 m
      - Quarter deck:   10.00 %,  15.00 ft / 4.57 m,  15.00 ft / 4.57 m
      - Average freeboard:      15.00 ft / 4.57 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 108.3 %
      - Above water (accommodation/working, high = better): 109.7 %
   Waterplane Area: 16,630 Square feet or 1,545 Square metres
   Displacement factor (Displacement / loading): 100 %
   Structure weight / hull surface area: 100 lbs/sq ft or 487 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.92
      - Longitudinal: 2.11
      - Overall: 1.00
   Adequate machinery, storage, compartmentation space
   Adequate accommodation and workspace room
   Ship has slow, easy roll, a good, steady gun platform
   Excellent seaboat, comfortable, can fire her guns in the heaviest weather

Miscellaneous weight accounts for 3 (bow, port, & starboard) submerged 18" torpedo tubes, with 9 reload torpedoes.

[KWorld]

USS Atlanta, United States Armored Cruiser laid down 1898

USS Atlanta
USS Minneapolis
USS Concord
USS Boise

Displacement:
   10,264 t light; 10,728 t standard; 11,693 t normal; 12,466 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (495.00 ft / 495.00 ft) x 65.00 ft x (24.00 / 25.23 ft)
   (150.88 m / 150.88 m) x 19.81 m  x (7.32 / 7.69 m)

Armament:
      4 - 10.00" / 254 mm 40.0 cal guns - 510.00lbs / 231.33kg shells, 120 per gun
     Breech loading guns in turret on barbette mounts, 1898 Model
     2 x Twin mounts on centreline ends, evenly spread
      14 - 5.00" / 127 mm 40.0 cal guns - 50.00lbs / 22.68kg shells, 200 per gun
     Breech loading guns in casemate mounts, 1898 Model
     14 x Single mounts on sides, evenly spread
      10 hull mounts in casemates- Limited use in all but light seas
      12 - 2.24" / 57.0 mm 45.0 cal guns - 6.00lbs / 2.72kg shells, 400 per gun
     Quick firing guns in deck mounts, 1898 Model
     12 x Single mounts on sides, evenly spread
      12 raised mounts
      Weight of broadside 2,812 lbs / 1,275 kg

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   6.00" / 152 mm   366.30 ft / 111.65 m   11.50 ft / 3.51 m
   Ends:   4.00" / 102 mm   128.68 ft / 39.22 m   8.00 ft / 2.44 m
   Upper:   4.00" / 102 mm   300.00 ft / 91.44 m   8.00 ft / 2.44 m
     Main Belt covers 114 % of normal length

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   6.00" / 152 mm   4.00" / 102 mm      6.00" / 152 mm
   2nd:   4.00" / 102 mm   2.00" / 51 mm      4.00" / 102 mm

   - Armoured deck - single deck:
   For and Aft decks: 2.00" / 51 mm
   Forecastle: 2.00" / 51 mm  Quarter deck: 2.00" / 51 mm

   - Conning towers: Forward 9.00" / 229 mm, Aft 6.00" / 152 mm

Machinery:
   Coal fired boilers, complex reciprocating steam engines,
   Direct drive, 2 shafts, 21,615 ihp / 16,125 Kw = 21.50 kts
   Range 6,000nm at 10.00 kts
   Bunker at max displacement = 1,738 tons (100% coal)

Complement:
   561 - 730

Cost:
   £1.046 million / $4.183 million

Distribution of weights at normal displacement:
   Armament: 506 tons, 4.3 %
      - Guns: 506 tons, 4.3 %
   Armour: 3,024 tons, 25.9 %
      - Belts: 1,609 tons, 13.8 %
      - Armament: 426 tons, 3.6 %
      - Armour Deck: 823 tons, 7.0 %
      - Conning Towers: 166 tons, 1.4 %
   Machinery: 3,486 tons, 29.8 %
   Hull, fittings & equipment: 3,242 tons, 27.7 %
   Fuel, ammunition & stores: 1,429 tons, 12.2 %
   Miscellaneous weights: 6 tons, 0.1 %
      - Hull below water: 6 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     9,579 lbs / 4,345 Kg = 19.2 x 10.0 " / 254 mm shells or 1.4 torpedoes
   Stability (Unstable if below 1.00): 1.39
   Metacentric height 4.7 ft / 1.4 m
   Roll period: 12.6 seconds
   Steadiness   - As gun platform (Average = 50 %): 76 %
         - Recoil effect (Restricted arc if above 1.00): 0.29
   Seaboat quality  (Average = 1.00): 1.52

Hull form characteristics:
   Hull has a flush deck,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0.530 / 0.538
   Length to Beam Ratio: 7.62 : 1
   'Natural speed' for length: 22.25 kts
   Power going to wave formation at top speed: 45 %
   Trim (Max stability = 0, Max steadiness = 100): 50
   Bow angle (Positive = bow angles forward): 0.00 degrees
   Stern overhang: 0.00 ft / 0.00 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
      - Forecastle:   16.00 %,  19.00 ft / 5.79 m,  14.50 ft / 4.42 m
      - Forward deck:   30.00 %,  14.50 ft / 4.42 m,  14.50 ft / 4.42 m
      - Aft deck:   44.00 %,  14.50 ft / 4.42 m,  14.50 ft / 4.42 m
      - Quarter deck:   10.00 %,  14.50 ft / 4.42 m,  14.50 ft / 4.42 m
      - Average freeboard:      14.79 ft / 4.51 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 113.2 %
      - Above water (accommodation/working, high = better): 108.5 %
   Waterplane Area: 22,039 Square feet or 2,047 Square metres
   Displacement factor (Displacement / loading): 98 %
   Structure weight / hull surface area: 106 lbs/sq ft or 520 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.96
      - Longitudinal: 1.37
      - Overall: 1.00
   Cramped machinery, storage, compartmentation space
   Adequate accommodation and workspace room
   Ship has slow, easy roll, a good, steady gun platform
   Excellent seaboat, comfortable, can fire her guns in the heaviest weather

[KWorld]

An evolutionary improvement on the Atlanta class.  Improves the main armament, increases the size of the secondary and tertiary armament, and adds a wireless.


USS Salt Lake City, United States Armored Cruiser laid down 1900

USS Salt Lake City, laid down 1900

Displacement:
   12,333 t light; 12,923 t standard; 13,986 t normal; 14,837 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (555.00 ft / 555.00 ft) x 70.00 ft x (24.00 / 25.12 ft)
   (169.16 m / 169.16 m) x 21.34 m  x (7.32 / 7.66 m)

Armament:
      6 - 10.00" / 254 mm 45.0 cal guns - 510.00lbs / 231.33kg shells, 100 per gun
     Breech loading guns in turret on barbette mounts, 1900 Model
     3 x Twin mounts on centreline ends, majority aft
      12 - 6.00" / 152 mm 50.0 cal guns - 105.01lbs / 47.63kg shells, 150 per gun
     Breech loading guns in casemate mounts, 1900 Model
     12 x Single mounts on sides, evenly spread
      8 hull mounts in casemates- Limited use in heavy seas
      12 - 3.00" / 76.2 mm 50.0 cal guns - 13.01lbs / 5.90kg shells, 400 per gun
     Quick firing guns in deck mounts, 1900 Model
     12 x Single mounts on sides, evenly spread
      12 raised mounts
      Weight of broadside 4,476 lbs / 2,030 kg

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   6.00" / 152 mm   394.05 ft / 120.11 m   13.00 ft / 3.96 m
   Ends:   4.00" / 102 mm   160.93 ft / 49.05 m   8.00 ft / 2.44 m
   Upper:   4.00" / 102 mm   300.00 ft / 91.44 m   8.00 ft / 2.44 m
     Main Belt covers 109 % of normal length

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   6.00" / 152 mm   4.00" / 102 mm      6.00" / 152 mm
   3rd:   4.00" / 102 mm         -         4.00" / 102 mm

   - Armoured deck - single deck:
   For and Aft decks: 2.00" / 51 mm
   Forecastle: 2.00" / 51 mm  Quarter deck: 2.00" / 51 mm

   - Conning towers: Forward 9.00" / 229 mm, Aft 6.00" / 152 mm

Machinery:
   Coal fired boilers, complex reciprocating steam engines,
   Direct drive, 2 shafts, 23,343 ihp / 17,414 Kw = 21.50 kts
   Range 6,000nm at 10.00 kts
   Bunker at max displacement = 1,914 tons (100% coal)

Complement:
   642 - 835

Cost:
   £1.307 million / $5.227 million

Distribution of weights at normal displacement:
   Armament: 935 tons, 6.7 %
      - Guns: 935 tons, 6.7 %
   Armour: 3,603 tons, 25.8 %
      - Belts: 1,879 tons, 13.4 %
      - Armament: 548 tons, 3.9 %
      - Armour Deck: 988 tons, 7.1 %
      - Conning Towers: 188 tons, 1.3 %
   Machinery: 3,647 tons, 26.1 %
   Hull, fittings & equipment: 4,107 tons, 29.4 %
   Fuel, ammunition & stores: 1,653 tons, 11.8 %
   Miscellaneous weights: 41 tons, 0.3 %
      - Hull below water: 16 tons
      - Above deck: 25 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     12,648 lbs / 5,737 Kg = 25.3 x 10.0 " / 254 mm shells or 1.6 torpedoes
   Stability (Unstable if below 1.00): 1.32
   Metacentric height 4.8 ft / 1.5 m
   Roll period: 13.4 seconds
   Steadiness   - As gun platform (Average = 50 %): 75 %
         - Recoil effect (Restricted arc if above 1.00): 0.43
   Seaboat quality  (Average = 1.00): 1.50

Hull form characteristics:
   Hull has a flush deck,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0.525 / 0.532
   Length to Beam Ratio: 7.93 : 1
   'Natural speed' for length: 23.56 kts
   Power going to wave formation at top speed: 41 %
   Trim (Max stability = 0, Max steadiness = 100): 50
   Bow angle (Positive = bow angles forward): 0.00 degrees
   Stern overhang: 0.00 ft / 0.00 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
      - Forecastle:   17.00 %,  22.00 ft / 6.71 m,  17.00 ft / 5.18 m
      - Forward deck:   20.00 %,  17.00 ft / 5.18 m,  16.00 ft / 4.88 m
      - Aft deck:   51.00 %,  16.00 ft / 4.88 m,  16.00 ft / 4.88 m
      - Quarter deck:   12.00 %,  16.00 ft / 4.88 m,  16.00 ft / 4.88 m
      - Average freeboard:      16.61 ft / 5.06 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 109.0 %
      - Above water (accommodation/working, high = better): 126.8 %
   Waterplane Area: 26,487 Square feet or 2,461 Square metres
   Displacement factor (Displacement / loading): 97 %
   Structure weight / hull surface area: 117 lbs/sq ft or 573 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.97
      - Longitudinal: 1.28
      - Overall: 1.00
   Adequate machinery, storage, compartmentation space
   Excellent accommodation and workspace room
   Ship has slow, easy roll, a good, steady gun platform
   Excellent seaboat, comfortable, can fire her guns in the heaviest weather

Below-decks miscellaneous weight accounts for 4 submerged broadside 18" 5m wet heater torpedo tubes and 12 reload torpedoes.

Above-decks miscellaneous weight allows for a long-range wireless installation.

[KWorld]

A more radical change to the paradigm of USS Atlanta, whether it is an improvement or not will depend on the success or failure of the new stacked 6" over 10" turrets.  Main turrets are laid out in an AXY, with the aft turrets back-to-back as on the OTL Delaware class.

USS Pittsburgh, United States Armored Cruiser laid down 1900

USS Pittsburgh laid down 1900

Displacement:
   13,298 t light; 13,936 t standard; 15,089 t normal; 16,012 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (555.00 ft / 555.00 ft) x 72.50 ft x (25.00 / 26.18 ft)
   (169.16 m / 169.16 m) x 22.10 m  x (7.62 / 7.98 m)

Armament:
      6 - 10.00" / 254 mm 45.0 cal guns - 510.00lbs / 231.33kg shells, 100 per gun
     Breech loading guns in turret on barbette mounts, 1900 Model
     3 x Twin mounts on centreline ends, majority aft
      6 - 6.00" / 152 mm 50.0 cal guns - 105.01lbs / 47.63kg shells, 200 per gun
     Breech loading guns in deck and hoist mounts, 1900 Model
     3 x Twin mounts on centreline ends, majority aft
      3 raised mounts
      8 - 6.00" / 152 mm 50.0 cal guns - 105.01lbs / 47.63kg shells, 150 per gun
     Quick firing guns in casemate mounts, 1900 Model
     8 x Single mounts on sides, evenly spread
      12 - 3.00" / 76.2 mm 50.0 cal guns - 13.01lbs / 5.90kg shells, 300 per gun
     Quick firing guns in deck mounts, 1900 Model
     12 x Single mounts on sides, evenly spread
      12 raised mounts
      Weight of broadside 4,686 lbs / 2,126 kg

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   6.00" / 152 mm   394.05 ft / 120.11 m   13.00 ft / 3.96 m
   Ends:   4.00" / 102 mm   160.93 ft / 49.05 m   8.00 ft / 2.44 m
   Upper:   4.00" / 102 mm   300.00 ft / 91.44 m   8.00 ft / 2.44 m
     Main Belt covers 109 % of normal length

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   6.00" / 152 mm   4.00" / 102 mm      6.00" / 152 mm
   2nd:   8.00" / 203 mm   6.00" / 152 mm            -
   3rd:   4.00" / 102 mm         -         4.00" / 102 mm

   - Armoured deck - single deck:
   For and Aft decks: 2.00" / 51 mm
   Forecastle: 2.00" / 51 mm  Quarter deck: 2.00" / 51 mm

   - Conning towers: Forward 9.00" / 229 mm, Aft 6.00" / 152 mm

Machinery:
   Coal fired boilers, complex reciprocating steam engines,
   Direct drive, 2 shafts, 24,493 ihp / 18,272 Kw = 21.50 kts
   Range 6,250nm at 10.00 kts
   Bunker at max displacement = 2,076 tons (100% coal)

Complement:
   679 - 884

Cost:
   £1.414 million / $5.655 million

Distribution of weights at normal displacement:
   Armament: 1,043 tons, 6.9 %
      - Guns: 1,043 tons, 6.9 %
   Armour: 3,778 tons, 25.0 %
      - Belts: 1,886 tons, 12.5 %
      - Armament: 671 tons, 4.4 %
      - Armour Deck: 1,024 tons, 6.8 %
      - Conning Towers: 197 tons, 1.3 %
   Machinery: 3,827 tons, 25.4 %
   Hull, fittings & equipment: 4,612 tons, 30.6 %
   Fuel, ammunition & stores: 1,791 tons, 11.9 %
   Miscellaneous weights: 37 tons, 0.2 %
      - Hull below water: 12 tons
      - Above deck: 25 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     13,535 lbs / 6,139 Kg = 27.1 x 10.0 " / 254 mm shells or 1.7 torpedoes
   Stability (Unstable if below 1.00): 1.25
   Metacentric height 4.6 ft / 1.4 m
   Roll period: 14.1 seconds
   Steadiness   - As gun platform (Average = 50 %): 75 %
         - Recoil effect (Restricted arc if above 1.00): 0.50
   Seaboat quality  (Average = 1.00): 1.50

Hull form characteristics:
   Hull has a flush deck,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0.525 / 0.532
   Length to Beam Ratio: 7.66 : 1
   'Natural speed' for length: 23.56 kts
   Power going to wave formation at top speed: 42 %
   Trim (Max stability = 0, Max steadiness = 100): 50
   Bow angle (Positive = bow angles forward): 0.00 degrees
   Stern overhang: 0.00 ft / 0.00 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
      - Forecastle:   17.00 %,  23.00 ft / 7.01 m,  18.00 ft / 5.49 m
      - Forward deck:   40.00 %,  18.00 ft / 5.49 m,  16.00 ft / 4.88 m
      - Aft deck:   31.00 %,  16.00 ft / 4.88 m,  16.00 ft / 4.88 m
      - Quarter deck:   12.00 %,  16.00 ft / 4.88 m,  16.00 ft / 4.88 m
      - Average freeboard:      17.08 ft / 5.21 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 107.7 %
      - Above water (accommodation/working, high = better): 127.5 %
   Waterplane Area: 27,433 Square feet or 2,549 Square metres
   Displacement factor (Displacement / loading): 98 %
   Structure weight / hull surface area: 127 lbs/sq ft or 620 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.97
      - Longitudinal: 1.39
      - Overall: 1.00
   Adequate machinery, storage, compartmentation space
   Excellent accommodation and workspace room
   Ship has slow, easy roll, a good, steady gun platform
   Excellent seaboat, comfortable, can fire her guns in the heaviest weather

Below-decks miscellaneous weight accounts for 4 submerged broadside 18" 5m wet heater torpedo tubes and 8 reload torpedoes.

Above-decks miscellaneous weight allows for a long-range wireless installation.