Ac/Fleet-cruiser

[ledeper]

Revised City-Class, BCS Ac/Fleet-cruiser laid down 1913 (Engine 1912)

Displacement:
   9.877 t light; 10.350 t standard; 11.972 t normal; 13.269 t full load

Dimensions: Length overall / water x beam x draught
   550,65 ft / 541,34 ft x 55,77 ft x 24,61 ft (normal load)
   167,84 m / 165,00 m x 17,00 m  x 7,50 m

Armament:
      9 - 8,00" / 203 mm guns (3x3 guns), 256,00lbs / 116,12kg shells, 1913 Model
     Breech loading guns in turrets (on barbettes)
     on centreline ends, majority forward, 1 raised mount - superfiring
      12 - 4,00" / 102 mm guns in single mounts, 32,00lbs / 14,51kg shells, 1913 Model
     Quick firing guns in deck mounts
     on side, all amidships
      4 - 1,57" / 40,0 mm guns in single mounts, 1,95lbs / 0,89kg shells, 1913 Model
     Quick firing guns in deck mounts
     on side, evenly spread, all raised mounts
   Weight of broadside 2.696 lbs / 1.223 kg
   Shells per gun, main battery: 150

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   8,00" / 203 mm   351,87 ft / 107,25 m   8,96 ft / 2,73 m
   Ends:   Unarmoured
   Upper:   3,00" / 76 mm   351,87 ft / 107,25 m   8,00 ft / 2,44 m
     Main Belt covers 100 % of normal length

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   6,00" / 152 mm   2,00" / 51 mm      4,00" / 102 mm
   2nd:   0,50" / 13 mm         -               -
   3rd:   0,50" / 13 mm         -               -

   - Armour deck: 3,00" / 76 mm, Conning tower: 8,00" / 203 mm

Machinery:
   Oil fired boilers, steam turbines,
   Electric motors, 3 shafts, 58.897 shp / 43.937 Kw = 28,00 kts
   Range 6.500nm at 16,00 kts
   Bunker at max displacement = 2.919 tons

Complement:
   571 - 743

Cost:
   £1,045 million / $4,178 million

Distribution of weights at normal displacement:
   Armament: 337 tons, 2,8 %
   Armour: 3.067 tons, 25,6 %
      - Belts: 1.408 tons, 11,8 %
      - Torpedo bulkhead: 0 tons, 0,0 %
      - Armament: 384 tons, 3,2 %
      - Armour Deck: 1.185 tons, 9,9 %
      - Conning Tower: 90 tons, 0,8 %
   Machinery: 2.348 tons, 19,6 %
   Hull, fittings & equipment: 3.775 tons, 31,5 %
   Fuel, ammunition & stores: 2.094 tons, 17,5 %
   Miscellaneous weights: 350 tons, 2,9 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     12.985 lbs / 5.890 Kg = 50,7 x 8,0 " / 203 mm shells or 1,7 torpedoes
   Stability (Unstable if below 1.00): 1,08
   Metacentric height 2,4 ft / 0,7 m
   Roll period: 15,1 seconds
   Steadiness   - As gun platform (Average = 50 %): 55 %
         - Recoil effect (Restricted arc if above 1.00): 0,73
   Seaboat quality  (Average = 1.00): 1,10

Hull form characteristics:
   Hull has a flush deck
   Block coefficient: 0,564
   Length to Beam Ratio: 9,71 : 1
   'Natural speed' for length: 23,27 kts
   Power going to wave formation at top speed: 54 %
   Trim (Max stability = 0, Max steadiness = 100): 50
   Bow angle (Positive = bow angles forward): 20,00 degrees
   Stern overhang: 0,00 ft / 0,00 m
   Freeboard (% = measuring location as a percentage of overall length):
      - Stem:      25,59 ft / 7,80 m
      - Forecastle (20 %):   19,55 ft / 5,96 m
      - Mid (50 %):      16,27 ft / 4,96 m
      - Quarterdeck (15 %):   16,27 ft / 4,96 m
      - Stern:      16,27 ft / 4,96 m
      - Average freeboard:   17,90 ft / 5,46 m

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 89,1 %
      - Above water (accommodation/working, high = better): 121,3 %
   Waterplane Area: 21.350 Square feet or 1.983 Square metres
   Displacement factor (Displacement / loading): 111 %
   Structure weight / hull surface area: 105 lbs/sq ft or 513 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0,95
      - Longitudinal: 1,48
      - Overall: 1,00
   Hull space for machinery, storage, compartmentation is adequate
   Room for accommodation and workspaces is excellent

[miketr]

A couple of comments

1) 3x3 8" is a good amount of firepower to be ure.

2) 8" belt might be over kill.  6.5" or 6" might do the same what level of fire power are you worried about?

3) Sea keeping and stability are nothing great.

4) Bunkerage is massive; I take it this is to do double duty as a raider?

Michael

[ledeper]

Some is to replace older cruisers at colonial-duty,others is to act as a scouting group.
The long endurance is due to the widespread area from New-Foundland to the Baltic sea(Baltjiske Moore). ;D ;) ;)

[P3D]

What is overkill is the 3" armored deck. With the main belt shallow enough that it's top edge (and the armor deck) is below the waterline (at full displacement) AND unarmored parts are exposed if the ship is steaming faster than 12 knots that is a very unfortunate armor arrangement. That 3000t fuel is the equivalent of 2m extra draught compared to light conditions (waterplane area 2000m2, rounded up from 1500)

[ledeper]

I have a philosophy that the upper belt and the armor deck have the thickness,but it is open for debate ,the philosophy i mean :)

[ledeper]

Enter ship name, Enter country Enter ship type laid down 1913 (Engine 1912)

Displacement:
   10.102 t light; 10.563 t standard; 11.750 t normal; 12.700 t full load

Dimensions: Length overall / water x beam x draught
   550,65 ft / 541,34 ft x 59,06 ft x 24,61 ft (normal load)
   167,84 m / 165,00 m x 18,00 m  x 7,50 m

Armament:
      9 - 8,00" / 203 mm guns (3x3 guns), 256,00lbs / 116,12kg shells, 1913 Model
     Breech loading guns in turrets (on barbettes)
     on centreline ends, majority forward, 1 raised mount - superfiring
      10 - 4,00" / 102 mm guns in single mounts, 32,00lbs / 14,51kg shells, 1913 Model
     Quick firing guns in deck mounts
     on side, all amidships
      4 - 1,57" / 40,0 mm guns in single mounts, 1,95lbs / 0,89kg shells, 1913 Model
     Quick firing guns in deck mounts
     on side, evenly spread
   Weight of broadside 2.632 lbs / 1.194 kg
   Shells per gun, main battery: 150

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   6,00" / 152 mm   351,87 ft / 107,25 m   12,22 ft / 3,72 m
   Ends:   Unarmoured
   Upper:   2,00" / 51 mm   351,87 ft / 107,25 m   8,00 ft / 2,44 m
     Main Belt covers 100 % 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:   0,50" / 13 mm         -               -
   3rd:   0,50" / 13 mm         -               -

   - Armour deck: 2,00" / 51 mm, Conning tower: 6,00" / 152 mm

Machinery:
   Oil fired boilers, steam turbines,
   Electric motors, 3 shafts, 59.784 shp / 44.599 Kw = 28,25 kts
   Range 6.500nm at 14,00 kts
   Bunker at max displacement = 2.137 tons

Complement:
   563 - 733

Cost:
   £1,051 million / $4,205 million

Distribution of weights at normal displacement:
   Armament: 329 tons, 2,8 %
   Armour: 2.810 tons, 23,9 %
      - Belts: 1.320 tons, 11,2 %
      - Torpedo bulkhead: 0 tons, 0,0 %
      - Armament: 619 tons, 5,3 %
      - Armour Deck: 805 tons, 6,8 %
      - Conning Tower: 67 tons, 0,6 %
   Machinery: 2.384 tons, 20,3 %
   Hull, fittings & equipment: 4.228 tons, 36,0 %
   Fuel, ammunition & stores: 1.648 tons, 14,0 %
   Miscellaneous weights: 350 tons, 3,0 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     13.549 lbs / 6.146 Kg = 52,9 x 8,0 " / 203 mm shells or 1,7 torpedoes
   Stability (Unstable if below 1.00): 1,03
   Metacentric height 2,4 ft / 0,7 m
   Roll period: 16,0 seconds
   Steadiness   - As gun platform (Average = 50 %): 65 %
         - Recoil effect (Restricted arc if above 1.00): 0,83
   Seaboat quality  (Average = 1.00): 1,33

Hull form characteristics:
   Hull has a flush deck
   Block coefficient: 0,523
   Length to Beam Ratio: 9,17 : 1
   'Natural speed' for length: 23,27 kts
   Power going to wave formation at top speed: 54 %
   Trim (Max stability = 0, Max steadiness = 100): 49
   Bow angle (Positive = bow angles forward): 20,00 degrees
   Stern overhang: 0,00 ft / 0,00 m
   Freeboard (% = measuring location as a percentage of overall length):
      - Stem:      25,59 ft / 7,80 m
      - Forecastle (20 %):   22,83 ft / 6,96 m
      - Mid (50 %):      19,55 ft / 5,96 m
      - Quarterdeck (15 %):   19,55 ft / 5,96 m
      - Stern:      19,55 ft / 5,96 m
      - Average freeboard:   20,92 ft / 6,38 m

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 91,2 %
      - Above water (accommodation/working, high = better): 149,5 %
   Waterplane Area: 21.751 Square feet or 2.021 Square metres
   Displacement factor (Displacement / loading): 111 %
   Structure weight / hull surface area: 111 lbs/sq ft or 543 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0,93
      - Longitudinal: 1,96
      - Overall: 1,00
   Hull space for machinery, storage, compartmentation is adequate
   Room for accommodation and workspaces is excellent
   Good seaboat, rides out heavy weather easily

Lighter armor,less draft,2 4"less

[ledeper]

Enter ship name, Enter country Enter ship type laid down 1913 (Engine 1912)

Displacement:
   10.332 t light; 10.798 t standard; 12.000 t normal; 12.962 t full load

Dimensions: Length overall / water x beam x draught
   550,65 ft / 541,34 ft x 59,06 ft x 24,61 ft (normal load)
   167,84 m / 165,00 m x 18,00 m  x 7,50 m

Armament:
      9 - 8,00" / 203 mm guns (3x3 guns), 256,00lbs / 116,12kg shells, 1913 Model
     Breech loading guns in turrets (on barbettes)
     on centreline ends, majority forward, 1 raised mount - superfiring
      10 - 4,00" / 102 mm guns in single mounts, 32,00lbs / 14,51kg shells, 1913 Model
     Quick firing guns in deck mounts
     on side, all amidships
      4 - 1,57" / 40,0 mm guns in single mounts, 1,95lbs / 0,89kg shells, 1913 Model
     Quick firing guns in deck mounts
     on side, evenly spread
   Weight of broadside 2.632 lbs / 1.194 kg
   Shells per gun, main battery: 150

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   6,00" / 152 mm   351,87 ft / 107,25 m   12,22 ft / 3,72 m
   Ends:   Unarmoured
   Upper:   2,50" / 64 mm   351,87 ft / 107,25 m   8,00 ft / 2,44 m
     Main Belt covers 100 % 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:   0,50" / 13 mm         -               -
   3rd:   0,50" / 13 mm         -               -

   - Armour deck: 2,50" / 64 mm, Conning tower: 6,00" / 152 mm

Machinery:
   Oil fired boilers, steam turbines,
   Electric motors, 3 shafts, 58.707 shp / 43.796 Kw = 28,00 kts
   Range 6.500nm at 14,00 kts
   Bunker at max displacement = 2.164 tons

Complement:
   573 - 745

Cost:
   £1,053 million / $4,214 million

Distribution of weights at normal displacement:
   Armament: 329 tons, 2,7 %
   Armour: 3.082 tons, 25,7 %
      - Belts: 1.379 tons, 11,5 %
      - Torpedo bulkhead: 0 tons, 0,0 %
      - Armament: 619 tons, 5,2 %
      - Armour Deck: 1.016 tons, 8,5 %
      - Conning Tower: 68 tons, 0,6 %
   Machinery: 2.341 tons, 19,5 %
   Hull, fittings & equipment: 4.229 tons, 35,2 %
   Fuel, ammunition & stores: 1.668 tons, 13,9 %
   Miscellaneous weights: 350 tons, 2,9 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     14.197 lbs / 6.439 Kg = 55,5 x 8,0 " / 203 mm shells or 1,8 torpedoes
   Stability (Unstable if below 1.00): 1,03
   Metacentric height 2,4 ft / 0,7 m
   Roll period: 16,0 seconds
   Steadiness   - As gun platform (Average = 50 %): 66 %
         - Recoil effect (Restricted arc if above 1.00): 0,83
   Seaboat quality  (Average = 1.00): 1,34

Hull form characteristics:
   Hull has a flush deck
   Block coefficient: 0,534
   Length to Beam Ratio: 9,17 : 1
   'Natural speed' for length: 23,27 kts
   Power going to wave formation at top speed: 54 %
   Trim (Max stability = 0, Max steadiness = 100): 49
   Bow angle (Positive = bow angles forward): 20,00 degrees
   Stern overhang: 0,00 ft / 0,00 m
   Freeboard (% = measuring location as a percentage of overall length):
      - Stem:      25,59 ft / 7,80 m
      - Forecastle (20 %):   22,83 ft / 6,96 m
      - Mid (50 %):      19,55 ft / 5,96 m
      - Quarterdeck (15 %):   19,55 ft / 5,96 m
      - Stern:      19,55 ft / 5,96 m
      - Average freeboard:   20,92 ft / 6,38 m

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 88,2 %
      - Above water (accommodation/working, high = better): 148,4 %
   Waterplane Area: 21.978 Square feet or 2.042 Square metres
   Displacement factor (Displacement / loading): 112 %
   Structure weight / hull surface area: 110 lbs/sq ft or 539 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0,93
      - Longitudinal: 1,94
      - Overall: 1,00
   Hull space for machinery, storage, compartmentation is adequate
   Room for accommodation and workspaces is excellent
   Good seaboat, rides out heavy weather easily

½ " more armor upper+deck