Iberian Protected Cruiser Design

[miketr]

Its a bit larger than I wanted but its well protected, fast and has good fire power.  Odds are it won't be laid down till 1913 but I doubt that will matter on the design.

Any thoughts.

Michael

PC-1912, Iberia Protected Cruiser laid down 1912

Displacement:
   7,250 t light; 7,496 t standard; 8,111 t normal; 8,604 t full load

Dimensions: Length overall / water x beam x draught
   574.15 ft / 574.15 ft x 57.41 ft x 17.22 ft (normal load)
   175.00 m / 175.00 m x 17.50 m  x 5.25 m

Armament:
      8 - 5.91" / 150 mm guns (4x2 guns), 102.98lbs / 46.71kg shells, 1912 Model
     Breech loading guns in deck mounts with hoists
     on centreline ends, evenly spread, 2 raised mounts - superfiring
      8 - 2.95" / 75.0 mm guns in single mounts, 12.87lbs / 5.84kg shells, 1912 Model
     Breech loading guns in deck mounts with hoists
     on side, all amidships
      8 - 1.97" / 50.0 mm guns in single mounts, 3.81lbs / 1.73kg shells, 1912 Model
     Quick firing guns in deck mounts
     on side, evenly spread, all raised mounts
   Weight of broadside 957 lbs / 434 kg
   Shells per gun, main battery: 150
   3 - 20.0" / 508 mm above water torpedoes

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   4.72" / 120 mm   426.51 ft / 130.00 m   9.09 ft / 2.77 m
   Ends:   Unarmoured
     Main Belt covers 114 % of normal length

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   2.95" / 75 mm         -               -
   2nd:   1.97" / 50 mm         -               -
   3rd:   0.98" / 25 mm         -               -

   - Armour deck: 1.57" / 40 mm, Conning tower: 3.94" / 100 mm

Machinery:
   Coal and oil fired boilers, steam turbines,
   Direct drive, 3 shafts, 60,000 shp / 44,760 Kw = 30.25 kts
   Range 7,090nm at 10.00 kts
   Bunker at max displacement = 1,108 tons (50% coal)

Complement:
   426 - 555

Cost:
   £0.705 million / $2.821 million

Distribution of weights at normal displacement:
   Armament: 120 tons, 1.5 %
   Armour: 1,522 tons, 18.8 %
      - Belts: 747 tons, 9.2 %
      - Torpedo bulkhead: 0 tons, 0.0 %
      - Armament: 100 tons, 1.2 %
      - Armour Deck: 640 tons, 7.9 %
      - Conning Tower: 34 tons, 0.4 %
   Machinery: 2,506 tons, 30.9 %
   Hull, fittings & equipment: 3,042 tons, 37.5 %
   Fuel, ammunition & stores: 862 tons, 10.6 %
   Miscellaneous weights: 60 tons, 0.7 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     8,334 lbs / 3,780 Kg = 80.9 x 5.9 " / 150 mm shells or 1.2 torpedoes
   Stability (Unstable if below 1.00): 1.27
   Metacentric height 3.3 ft / 1.0 m
   Roll period: 13.2 seconds
   Steadiness   - As gun platform (Average = 50 %): 70 %
         - Recoil effect (Restricted arc if above 1.00): 0.27
   Seaboat quality  (Average = 1.00): 1.21

Hull form characteristics:
   Hull has a flush deck
   Block coefficient: 0.500
   Length to Beam Ratio: 10.00 : 1
   'Natural speed' for length: 23.96 kts
   Power going to wave formation at top speed: 53 %
   Trim (Max stability = 0, Max steadiness = 100): 58
   Bow angle (Positive = bow angles forward): 0.00 degrees
   Stern overhang: 0.00 ft / 0.00 m
   Freeboard (% = measuring location as a percentage of overall length):
      - Stem:      23.79 ft / 7.25 m
      - Forecastle (20 %):   19.69 ft / 6.00 m
      - Mid (50 %):      16.40 ft / 5.00 m
      - Quarterdeck (15 %):   16.40 ft / 5.00 m
      - Stern:      16.40 ft / 5.00 m
      - Average freeboard:   17.88 ft / 5.45 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 112.7 %
      - Above water (accommodation/working, high = better): 158.9 %
   Waterplane Area: 21,963 Square feet or 2,040 Square metres
   Displacement factor (Displacement / loading): 107 %
   Structure weight / hull surface area: 90 lbs/sq ft or 439 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.98
      - Longitudinal: 1.11
      - Overall: 1.00
   Hull space for machinery, storage, compartmentation is cramped
   Room for accommodation and workspaces is excellent
   Ship has slow, easy roll, a good, steady gun platform
   Good seaboat, rides out heavy weather easily

[miketr]

A bit higher of a main belt and some additional protection on the guns.

PC-1912, Iberia Protected Cruiser laid down 1912

Displacement:
   7,250 t light; 7,496 t standard; 8,111 t normal; 8,604 t full load

Dimensions: Length overall / water x beam x draught
   574.15 ft / 574.15 ft x 57.41 ft x 17.22 ft (normal load)
   175.00 m / 175.00 m x 17.50 m  x 5.25 m

Armament:
      8 - 5.91" / 150 mm guns (4x2 guns), 102.98lbs / 46.71kg shells, 1912 Model
     Breech loading guns in deck mounts with hoists
     on centreline ends, evenly spread, 2 raised mounts - superfiring
      8 - 2.95" / 75.0 mm guns in single mounts, 12.87lbs / 5.84kg shells, 1912 Model
     Breech loading guns in deck mounts with hoists
     on side, all amidships
      8 - 1.97" / 50.0 mm guns in single mounts, 3.81lbs / 1.73kg shells, 1912 Model
     Quick firing guns in deck mounts
     on side, evenly spread, all raised mounts
   Weight of broadside 957 lbs / 434 kg
   Shells per gun, main battery: 150
   3 - 20.0" / 508 mm above water torpedoes

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   3.94" / 100 mm   426.51 ft / 130.00 m   9.84 ft / 3.00 m
   Ends:   Unarmoured
     Main Belt covers 114 % of normal length

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   2.95" / 75 mm         -         3.94" / 100 mm
   2nd:   1.97" / 50 mm         -               -
   3rd:   0.98" / 25 mm         -               -

   - Armour deck: 1.57" / 40 mm, Conning tower: 3.94" / 100 mm

Machinery:
   Coal and oil fired boilers, steam turbines,
   Direct drive, 3 shafts, 60,000 shp / 44,760 Kw = 30.25 kts
   Range 7,090nm at 10.00 kts
   Bunker at max displacement = 1,108 tons (50% coal)

Complement:
   426 - 555

Cost:
   £0.705 million / $2.821 million

Distribution of weights at normal displacement:
   Armament: 120 tons, 1.5 %
   Armour: 1,456 tons, 17.9 %
      - Belts: 674 tons, 8.3 %
      - Torpedo bulkhead: 0 tons, 0.0 %
      - Armament: 107 tons, 1.3 %
      - Armour Deck: 640 tons, 7.9 %
      - Conning Tower: 34 tons, 0.4 %
   Machinery: 2,506 tons, 30.9 %
   Hull, fittings & equipment: 3,045 tons, 37.5 %
   Fuel, ammunition & stores: 862 tons, 10.6 %
   Miscellaneous weights: 123 tons, 1.5 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     8,170 lbs / 3,706 Kg = 79.3 x 5.9 " / 150 mm shells or 1.2 torpedoes
   Stability (Unstable if below 1.00): 1.26
   Metacentric height 3.3 ft / 1.0 m
   Roll period: 13.3 seconds
   Steadiness   - As gun platform (Average = 50 %): 70 %
         - Recoil effect (Restricted arc if above 1.00): 0.28
   Seaboat quality  (Average = 1.00): 1.21

Hull form characteristics:
   Hull has a flush deck
   Block coefficient: 0.500
   Length to Beam Ratio: 10.00 : 1
   'Natural speed' for length: 23.96 kts
   Power going to wave formation at top speed: 53 %
   Trim (Max stability = 0, Max steadiness = 100): 58
   Bow angle (Positive = bow angles forward): 0.00 degrees
   Stern overhang: 0.00 ft / 0.00 m
   Freeboard (% = measuring location as a percentage of overall length):
      - Stem:      23.79 ft / 7.25 m
      - Forecastle (20 %):   19.69 ft / 6.00 m
      - Mid (50 %):      16.40 ft / 5.00 m
      - Quarterdeck (15 %):   16.40 ft / 5.00 m
      - Stern:      16.40 ft / 5.00 m
      - Average freeboard:   17.88 ft / 5.45 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 113.5 %
      - Above water (accommodation/working, high = better): 158.9 %
   Waterplane Area: 21,963 Square feet or 2,040 Square metres
   Displacement factor (Displacement / loading): 107 %
   Structure weight / hull surface area: 90 lbs/sq ft or 439 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.98
      - Longitudinal: 1.11
      - Overall: 1.00
   Hull space for machinery, storage, compartmentation is cramped
   Room for accommodation and workspaces is excellent
   Ship has slow, easy roll, a good, steady gun platform
   Good seaboat, rides out heavy weather easily

[Sachmle]

Great speed, but seems kinda large for a PC. Not a great deal of firepower for the weight.

[miketr]

Speed costs displacement... If I cut the speed back to 28 knots I could dump displacement by 1,500 tons; about 5,600 tons light displacement it looks like.  That extra 2.25 knots requires 50% more SHP and the hull to support it.

Michael

[Sachmle]

Speed costs displacement... and the hull to support it.

Michael

Yes it does, so you have to decide if it's worth it.

[miketr]

Here are the details of the lighter design.

Michael

PC-1912, Iberia Protected Cruiser laid down 1912

Displacement:
   5,500 t light; 5,711 t standard; 6,363 t normal; 6,885 t full load

Dimensions: Length overall / water x beam x draught
   508.53 ft / 508.53 ft x 50.85 ft x 17.22 ft (normal load)
   155.00 m / 155.00 m x 15.50 m  x 5.25 m

Armament:
      8 - 5.91" / 150 mm guns (4x2 guns), 102.98lbs / 46.71kg shells, 1912 Model
     Breech loading guns in deck mounts with hoists
     on centreline ends, evenly spread, 2 raised mounts - superfiring
      8 - 2.95" / 75.0 mm guns in single mounts, 12.87lbs / 5.84kg shells, 1912 Model
     Breech loading guns in deck mounts with hoists
     on side, all amidships
      8 - 1.97" / 50.0 mm guns in single mounts, 3.81lbs / 1.73kg shells, 1912 Model
     Quick firing guns in deck mounts
     on side, evenly spread, all raised mounts
   Weight of broadside 957 lbs / 434 kg
   Shells per gun, main battery: 150
   3 - 20.0" / 508 mm above water torpedoes

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   3.94" / 100 mm   334.65 ft / 102.00 m   13.12 ft / 4.00 m
   Ends:   Unarmoured
     Main Belt covers 101 % of normal length

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   2.95" / 75 mm         -         3.94" / 100 mm
   2nd:   1.97" / 50 mm         -               -
   3rd:   0.98" / 25 mm         -               -

   - Armour deck: 1.57" / 40 mm, Conning tower: 3.94" / 100 mm

Machinery:
   Coal and oil fired boilers, steam turbines,
   Direct drive, 3 shafts, 40,000 shp / 29,840 Kw = 28.05 kts
   Range 9,030nm at 10.00 kts
   Bunker at max displacement = 1,174 tons (50% coal)

Complement:
   356 - 463

Cost:
   £0.527 million / $2.108 million

Distribution of weights at normal displacement:
   Armament: 120 tons, 1.9 %
   Armour: 1,356 tons, 21.3 %
      - Belts: 718 tons, 11.3 %
      - Torpedo bulkhead: 0 tons, 0.0 %
      - Armament: 107 tons, 1.7 %
      - Armour Deck: 502 tons, 7.9 %
      - Conning Tower: 29 tons, 0.5 %
   Machinery: 1,671 tons, 26.3 %
   Hull, fittings & equipment: 2,305 tons, 36.2 %
   Fuel, ammunition & stores: 863 tons, 13.6 %
   Miscellaneous weights: 49 tons, 0.8 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     7,491 lbs / 3,398 Kg = 72.7 x 5.9 " / 150 mm shells or 1.2 torpedoes
   Stability (Unstable if below 1.00): 1.20
   Metacentric height 2.5 ft / 0.8 m
   Roll period: 13.4 seconds
   Steadiness   - As gun platform (Average = 50 %): 70 %
         - Recoil effect (Restricted arc if above 1.00): 0.41
   Seaboat quality  (Average = 1.00): 1.21

Hull form characteristics:
   Hull has a flush deck
   Block coefficient: 0.500
   Length to Beam Ratio: 10.00 : 1
   'Natural speed' for length: 22.55 kts
   Power going to wave formation at top speed: 53 %
   Trim (Max stability = 0, Max steadiness = 100): 58
   Bow angle (Positive = bow angles forward): 0.00 degrees
   Stern overhang: 0.00 ft / 0.00 m
   Freeboard (% = measuring location as a percentage of overall length):
      - Stem:      21.33 ft / 6.50 m
      - Forecastle (20 %):   18.04 ft / 5.50 m
      - Mid (50 %):      14.76 ft / 4.50 m
      - Quarterdeck (15 %):   14.76 ft / 4.50 m
      - Stern:      14.76 ft / 4.50 m
      - Average freeboard:   16.17 ft / 4.93 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 101.0 %
      - Above water (accommodation/working, high = better): 132.7 %
   Waterplane Area: 17,230 Square feet or 1,601 Square metres
   Displacement factor (Displacement / loading): 112 %
   Structure weight / hull surface area: 84 lbs/sq ft or 410 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.97
      - Longitudinal: 1.22
      - Overall: 1.00
   Hull space for machinery, storage, compartmentation is adequate
   Room for accommodation and workspaces is excellent
   Ship has slow, easy roll, a good, steady gun platform
   Good seaboat, rides out heavy weather easily

[Desertfox]

The lighter design is eerily similar to the Swiss Auroras:

Aurora class, New Switzerland Cruiser laid down 1907 (Engine 1909)

Displacement:
   5,505 t light; 5,807 t standard; 7,792 t normal; 9,381 t full load

Dimensions: Length overall / water x beam x draught
   540.00 ft / 540.00 ft x 54.00 ft x 19.90 ft (normal load)
   164.59 m / 164.59 m x 16.46 m  x 6.07 m

Armament:
      8 - 6.00" / 152 mm guns (4x2 guns), 108.00lbs / 48.99kg shells, 1907 Model
     Breech loading guns in deck mounts with hoists
     on centreline ends, evenly spread, 2 raised mounts - superfiring
      4 - 4.00" / 102 mm guns in single mounts, 32.00lbs / 14.51kg shells, 1907 Model
     Breech loading guns in deck mounts
     on side, all amidships
      8 - 1.57" / 40.0 mm guns (4x2 guns), 1.95lbs / 0.89kg shells, 1907 Model
     Breech loading guns in deck mounts
     on side, evenly spread
   Weight of broadside 1,008 lbs / 457 kg
   Shells per gun, main battery: 250
   6 - 19.7" / 500.38 mm above water torpedoes

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   4.00" / 102 mm   320.00 ft / 97.54 m   9.00 ft / 2.74 m
   Ends:   Unarmoured
     Main Belt covers 91 % of normal length

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   1.00" / 25 mm   0.50" / 13 mm      0.50" / 13 mm

   - Armour deck: 1.00" / 25 mm, Conning tower: 4.00" / 102 mm

Machinery:
   Oil fired boilers, steam turbines,
   Direct drive, 4 shafts, 37,703 shp / 28,126 Kw = 27.00 kts
   Range 10,500nm at 15.00 kts
   Bunker at max displacement = 3,574 tons

Complement:
   414 - 539

Cost:
   £0.538 million / $2.154 million

Distribution of weights at normal displacement:
   Armament: 126 tons, 1.6 %
   Armour: 893 tons, 11.5 %
      - Belts: 486 tons, 6.2 %
      - Torpedo bulkhead: 0 tons, 0.0 %
      - Armament: 23 tons, 0.3 %
      - Armour Deck: 350 tons, 4.5 %
      - Conning Tower: 34 tons, 0.4 %
   Machinery: 1,714 tons, 22.0 %
   Hull, fittings & equipment: 2,663 tons, 34.2 %
   Fuel, ammunition & stores: 2,287 tons, 29.4 %
   Miscellaneous weights: 110 tons, 1.4 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     11,402 lbs / 5,172 Kg = 105.6 x 6.0 " / 152 mm shells or 1.6 torpedoes
   Stability (Unstable if below 1.00): 1.43
   Metacentric height 3.7 ft / 1.1 m
   Roll period: 11.8 seconds
   Steadiness   - As gun platform (Average = 50 %): 71 %
         - Recoil effect (Restricted arc if above 1.00): 0.29
   Seaboat quality  (Average = 1.00): 1.51

Hull form characteristics:
   Hull has a flush deck
   Block coefficient: 0.470
   Length to Beam Ratio: 10.00 : 1
   'Natural speed' for length: 23.24 kts
   Power going to wave formation at top speed: 48 %
   Trim (Max stability = 0, Max steadiness = 100): 47
   Bow angle (Positive = bow angles forward): 0.00 degrees
   Stern overhang: 0.00 ft / 0.00 m
   Freeboard (% = measuring location as a percentage of overall length):
      - Stem:      25.00 ft / 7.62 m
      - Forecastle (25 %):   17.00 ft / 5.18 m
      - Mid (50 %):      17.00 ft / 5.18 m
      - Quarterdeck (15 %):   15.00 ft / 4.57 m
      - Stern:      12.00 ft / 3.66 m
      - Average freeboard:   16.93 ft / 5.16 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 86.8 %
      - Above water (accommodation/working, high = better): 125.1 %
   Waterplane Area: 18,917 Square feet or 1,757 Square metres
   Displacement factor (Displacement / loading): 143 %
   Structure weight / hull surface area: 86 lbs/sq ft or 421 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.97
      - Longitudinal: 1.30
      - Overall: 1.00
   Hull space for machinery, storage, compartmentation is adequate
   Room for accommodation and workspaces is excellent
   Ship has slow, easy roll, a good, steady gun platform
   Excellent seaboat, comfortable, can fire her guns in the heaviest weather

[Korpen]

If willing to reduce the armour: http://www.navalism.org/index.php?topic=2234.msg24712#msg24712

[miketr]

Giving up a little protection in exchange for some range and another pair of 150mm guns.

Michael

PC-1912 7.2K, Iberia Protected Cruiser laid down 1912

Displacement:
   7,200 t light; 7,463 t standard; 8,111 t normal; 8,630 t full load

Dimensions: Length overall / water x beam x draught
   574.15 ft / 574.15 ft x 57.41 ft x 17.22 ft (normal load)
   175.00 m / 175.00 m x 17.50 m  x 5.25 m

Armament:
      10 - 5.91" / 150 mm guns (5x2 guns), 102.98lbs / 46.71kg shells, 1912 Model
     Breech loading guns in deck mounts with hoists
     on centreline ends, majority forward, 2 raised mounts - superfiring
      8 - 2.95" / 75.0 mm guns in single mounts, 12.87lbs / 5.84kg shells, 1912 Model
     Breech loading guns in deck mounts with hoists
     on side, all amidships
      8 - 1.97" / 50.0 mm guns in single mounts, 3.81lbs / 1.73kg shells, 1912 Model
     Quick firing guns in deck mounts
     on side, evenly spread, all raised mounts
   Weight of broadside 1,163 lbs / 528 kg
   Shells per gun, main battery: 150
   3 - 20.0" / 508 mm above water torpedoes

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   3.35" / 85 mm   419.95 ft / 128.00 m   9.84 ft / 3.00 m
   Ends:   Unarmoured
     Main Belt covers 113 % of normal length

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   2.95" / 75 mm         -         3.94" / 100 mm
   2nd:   1.97" / 50 mm         -               -
   3rd:   0.98" / 25 mm         -               -

   - Armour deck: 1.57" / 40 mm, Conning tower: 3.94" / 100 mm

Machinery:
   Oil fired boilers, steam turbines,
   Direct drive, 3 shafts, 60,000 shp / 44,760 Kw = 30.25 kts
   Range 8,740nm at 10.00 kts
   Bunker at max displacement = 1,166 tons

Complement:
   426 - 555

Cost:
   £0.709 million / $2.836 million

Distribution of weights at normal displacement:
   Armament: 145 tons, 1.8 %
   Armour: 1,366 tons, 16.8 %
      - Belts: 566 tons, 7.0 %
      - Torpedo bulkhead: 0 tons, 0.0 %
      - Armament: 126 tons, 1.6 %
      - Armour Deck: 640 tons, 7.9 %
      - Conning Tower: 34 tons, 0.4 %
   Machinery: 2,392 tons, 29.5 %
   Hull, fittings & equipment: 3,099 tons, 38.2 %
   Fuel, ammunition & stores: 911 tons, 11.2 %
   Miscellaneous weights: 198 tons, 2.4 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     8,202 lbs / 3,720 Kg = 79.6 x 5.9 " / 150 mm shells or 1.2 torpedoes
   Stability (Unstable if below 1.00): 1.22
   Metacentric height 3.1 ft / 0.9 m
   Roll period: 13.7 seconds
   Steadiness   - As gun platform (Average = 50 %): 71 %
         - Recoil effect (Restricted arc if above 1.00): 0.34
   Seaboat quality  (Average = 1.00): 1.20

Hull form characteristics:
   Hull has a flush deck
   Block coefficient: 0.500
   Length to Beam Ratio: 10.00 : 1
   'Natural speed' for length: 23.96 kts
   Power going to wave formation at top speed: 53 %
   Trim (Max stability = 0, Max steadiness = 100): 59
   Bow angle (Positive = bow angles forward): 0.00 degrees
   Stern overhang: 0.00 ft / 0.00 m
   Freeboard (% = measuring location as a percentage of overall length):
      - Stem:      24.61 ft / 7.50 m
      - Forecastle (20 %):   19.69 ft / 6.00 m
      - Mid (50 %):      16.40 ft / 5.00 m
      - Quarterdeck (15 %):   16.40 ft / 5.00 m
      - Stern:      16.40 ft / 5.00 m
      - Average freeboard:   17.95 ft / 5.47 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 112.4 %
      - Above water (accommodation/working, high = better): 158.9 %
   Waterplane Area: 21,963 Square feet or 2,040 Square metres
   Displacement factor (Displacement / loading): 108 %
   Structure weight / hull surface area: 91 lbs/sq ft or 447 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.98
      - Longitudinal: 1.12
      - Overall: 1.00
   Hull space for machinery, storage, compartmentation is cramped
   Room for accommodation and workspaces is excellent
   Ship has slow, easy roll, a good, steady gun platform
   Good seaboat, rides out heavy weather easily

[miketr]

The lighter design is eerily similar to the Swiss Auroras:

Not a bad design, of course I want more speed hence the 60,000 shp and 7K design.

Michael

[miketr]

Slight change in layout of weapons.  Now to work on a drawing and write up a story for Malta.

Michael

PC-1912 7.2Ka, Iberia Protected Cruiser laid down 1912

Displacement:
   7,200 t light; 7,480 t standard; 8,111 t normal; 8,616 t full load

Dimensions: Length overall / water x beam x draught
   574.15 ft / 574.15 ft x 57.41 ft x 17.22 ft (normal load)
   175.00 m / 175.00 m x 17.50 m  x 5.25 m

Armament:
      10 - 5.91" / 150 mm guns (5x2 guns), 102.98lbs / 46.71kg shells, 1912 Model
     Breech loading guns in deck mounts with hoists
     on centreline ends, majority aft, 2 raised mounts - superfiring
      8 - 2.95" / 75.0 mm guns in single mounts, 12.87lbs / 5.84kg shells, 1912 Model
     Breech loading guns in deck mounts with hoists
     on side, all amidships
      8 - 1.97" / 50.0 mm guns in single mounts, 3.81lbs / 1.73kg shells, 1912 Model
     Quick firing guns in deck mounts
     on side, evenly spread, all raised mounts
   Weight of broadside 1,163 lbs / 528 kg
   Shells per gun, main battery: 175
   3 - 20.0" / 508 mm above water torpedoes

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   3.35" / 85 mm   418.31 ft / 127.50 m   9.84 ft / 3.00 m
   Ends:   Unarmoured
     Main Belt covers 112 % of normal length

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   2.95" / 75 mm         -         3.94" / 100 mm
   2nd:   1.97" / 50 mm         -               -
   3rd:   0.98" / 25 mm         -               -

   - Armour deck: 1.57" / 40 mm, Conning tower: 3.94" / 100 mm

Machinery:
   Oil fired boilers, steam turbines,
   Direct drive, 3 shafts, 60,000 shp / 44,760 Kw = 30.25 kts
   Range 8,500nm at 10.00 kts
   Bunker at max displacement = 1,136 tons

Complement:
   426 - 555

Cost:
   £0.709 million / $2.836 million

Distribution of weights at normal displacement:
   Armament: 145 tons, 1.8 %
   Armour: 1,365 tons, 16.8 %
      - Belts: 564 tons, 6.9 %
      - Torpedo bulkhead: 0 tons, 0.0 %
      - Armament: 127 tons, 1.6 %
      - Armour Deck: 640 tons, 7.9 %
      - Conning Tower: 34 tons, 0.4 %
   Machinery: 2,392 tons, 29.5 %
   Hull, fittings & equipment: 3,142 tons, 38.7 %
   Fuel, ammunition & stores: 912 tons, 11.2 %
   Miscellaneous weights: 156 tons, 1.9 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     8,532 lbs / 3,870 Kg = 82.8 x 5.9 " / 150 mm shells or 1.2 torpedoes
   Stability (Unstable if below 1.00): 1.22
   Metacentric height 3.1 ft / 1.0 m
   Roll period: 13.6 seconds
   Steadiness   - As gun platform (Average = 50 %): 71 %
         - Recoil effect (Restricted arc if above 1.00): 0.36
   Seaboat quality  (Average = 1.00): 1.21

Hull form characteristics:
   Hull has low quarterdeck
   Block coefficient: 0.500
   Length to Beam Ratio: 10.00 : 1
   'Natural speed' for length: 23.96 kts
   Power going to wave formation at top speed: 53 %
   Trim (Max stability = 0, Max steadiness = 100): 59
   Bow angle (Positive = bow angles forward): 0.00 degrees
   Stern overhang: 0.00 ft / 0.00 m
   Freeboard (% = measuring location as a percentage of overall length):
      - Stem:      24.61 ft / 7.50 m
      - Forecastle (20 %):   21.33 ft / 6.50 m
      - Mid (50 %):      17.22 ft / 5.25 m
      - Quarterdeck (15 %):   11.48 ft / 3.50 m (17.22 ft / 5.25 m before break)
      - Stern:      11.48 ft / 3.50 m
      - Average freeboard:   18.06 ft / 5.51 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 112.1 %
      - Above water (accommodation/working, high = better): 168.3 %
   Waterplane Area: 21,963 Square feet or 2,040 Square metres
   Displacement factor (Displacement / loading): 109 %
   Structure weight / hull surface area: 93 lbs/sq ft or 452 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.98
      - Longitudinal: 1.14
      - Overall: 1.00
   Hull space for machinery, storage, compartmentation is cramped
   Room for accommodation and workspaces is excellent
   Ship has slow, easy roll, a good, steady gun platform
   Good seaboat, rides out heavy weather easily

[Desertfox]

If I didn't know better, I would say you where looking at my file of SS2 designs!

This is what NS had planned for 1913.

Aurora class, New Switzerland Cruiser laid down 1912

Displacement:
   6,772 t light; 7,138 t standard; 9,018 t normal; 10,522 t full load

Dimensions: Length overall / water x beam x draught
   550.00 ft / 550.00 ft x 55.00 ft x 22.20 ft (normal load)
   167.64 m / 167.64 m x 16.76 m  x 6.77 m

Armament:
      10 - 6.00" / 152 mm guns (5x2 guns), 108.00lbs / 48.99kg shells, 1912 Model
     Breech loading guns in deck mounts with hoists
     on centreline ends, majority aft, 2 raised mounts - superfiring
      4 - 4.00" / 102 mm guns in single mounts, 32.00lbs / 14.51kg shells, 1912 Model
     Breech loading guns in deck mounts
     on side, all amidships
   Weight of broadside 1,208 lbs / 548 kg
   Shells per gun, main battery: 270
   6 - 19.7" / 500.38 mm above water torpedoes

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   4.00" / 102 mm   375.00 ft / 114.30 m   9.00 ft / 2.74 m
   Ends:   Unarmoured
     Main Belt covers 105 % of normal length

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   1.00" / 25 mm   0.50" / 13 mm      0.50" / 13 mm

   - Armour deck: 1.00" / 25 mm, Conning tower: 4.00" / 102 mm

Machinery:
   Oil fired boilers, steam turbines,
   Electric motors, 4 shafts, 62,098 shp / 46,325 Kw = 30.00 kts
   Range 10,500nm at 15.00 kts
   Bunker at max displacement = 3,384 tons

Complement:
   462 - 601

Cost:
   £0.710 million / $2.842 million

Distribution of weights at normal displacement:
   Armament: 151 tons, 1.7 %
   Armour: 986 tons, 10.9 %
      - Belts: 557 tons, 6.2 %
      - Torpedo bulkhead: 0 tons, 0.0 %
      - Armament: 29 tons, 0.3 %
      - Armour Deck: 363 tons, 4.0 %
      - Conning Tower: 37 tons, 0.4 %
   Machinery: 2,476 tons, 27.5 %
   Hull, fittings & equipment: 3,048 tons, 33.8 %
   Fuel, ammunition & stores: 2,246 tons, 24.9 %
   Miscellaneous weights: 110 tons, 1.2 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     9,853 lbs / 4,469 Kg = 91.2 x 6.0 " / 152 mm shells or 1.3 torpedoes
   Stability (Unstable if below 1.00): 1.31
   Metacentric height 3.3 ft / 1.0 m
   Roll period: 12.7 seconds
   Steadiness   - As gun platform (Average = 50 %): 71 %
         - Recoil effect (Restricted arc if above 1.00): 0.36
   Seaboat quality  (Average = 1.00): 1.26

Hull form characteristics:
   Hull has a flush deck
   Block coefficient: 0.470
   Length to Beam Ratio: 10.00 : 1
   'Natural speed' for length: 23.45 kts
   Power going to wave formation at top speed: 54 %
   Trim (Max stability = 0, Max steadiness = 100): 56
   Bow angle (Positive = bow angles forward): 0.00 degrees
   Stern overhang: 0.00 ft / 0.00 m
   Freeboard (% = measuring location as a percentage of overall length):
      - Stem:      27.00 ft / 8.23 m
      - Forecastle (25 %):   19.00 ft / 5.79 m
      - Mid (50 %):      19.00 ft / 5.79 m
      - Quarterdeck (15 %):   14.00 ft / 4.27 m
      - Stern:      14.00 ft / 4.27 m
      - Average freeboard:   18.18 ft / 5.54 m

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 104.6 %
      - Above water (accommodation/working, high = better): 124.9 %
   Waterplane Area: 19,624 Square feet or 1,823 Square metres
   Displacement factor (Displacement / loading): 124 %
   Structure weight / hull surface area: 92 lbs/sq ft or 447 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.96
      - Longitudinal: 1.48
      - Overall: 1.00
   Hull space for machinery, storage, compartmentation is adequate
   Room for accommodation and workspaces is excellent
   Ship has slow, easy roll, a good, steady gun platform
   Good seaboat, rides out heavy weather easily


These ships where the inspiration:
http://www.geocities.com/alt_naval/united_states/cl-huntington.htm
http://www.wesworld.jk-clan.de/thread.php?threadid=3232&sid=88cf01379cdd7887bbde559543a21a67

[miketr]

Draft of the ship layout.

50mm weapons not shown but the 75's are shown on the flanks. Also the layout looks like it could support another set of torpedo launchers so that would be 2x3 launchers midships like my 2,600 ton patrol cruisers.

Michael

[miketr]

It helps if you read the rules...  reduced gun armor to splinter protection; 25mm/1"

PC-1912 7.2Kb, Iberia Protected Cruiser laid down 1912

Displacement:
   7,061 t light; 7,341 t standard; 8,111 t normal; 8,728 t full load

Dimensions: Length overall / water x beam x draught
   574.15 ft / 574.15 ft x 57.41 ft x 17.22 ft (normal load)
   175.00 m / 175.00 m x 17.50 m  x 5.25 m

Armament:
      10 - 5.91" / 150 mm guns (5x2 guns), 102.98lbs / 46.71kg shells, 1912 Model
     Breech loading guns in deck mounts with hoists
     on centreline ends, majority aft, 3 raised mounts - superfiring
      8 - 2.95" / 75.0 mm guns in single mounts, 12.87lbs / 5.84kg shells, 1912 Model
     Breech loading guns in deck mounts with hoists
     on side, all amidships
      8 - 1.97" / 50.0 mm guns in single mounts, 3.81lbs / 1.73kg shells, 1912 Model
     Quick firing guns in deck mounts
     on side, evenly spread, all raised mounts
   Weight of broadside 1,163 lbs / 528 kg
   Shells per gun, main battery: 175
   6 - 20.0" / 508 mm above water torpedoes

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   2.95" / 75 mm   418.44 ft / 127.54 m   9.84 ft / 3.00 m
   Ends:   Unarmoured
     Main Belt covers 112 % of normal length
     Main belt does not fully cover magazines and engineering spaces

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   0.98" / 25 mm         -         2.95" / 75 mm
   2nd:   0.98" / 25 mm         -               -
   3rd:   0.98" / 25 mm         -               -

   - Armour deck: 1.57" / 40 mm, Conning tower: 3.94" / 100 mm

Machinery:
   Oil fired boilers, steam turbines,
   Direct drive, 3 shafts, 60,000 shp / 44,760 Kw = 30.25 kts
   Range 10,500nm at 10.00 kts
   Bunker at max displacement = 1,387 tons

Complement:
   426 - 555

Cost:
   £0.704 million / $2.817 million

Distribution of weights at normal displacement:
   Armament: 145 tons, 1.8 %
   Armour: 1,227 tons, 15.1 %
      - Belts: 498 tons, 6.1 %
      - Torpedo bulkhead: 0 tons, 0.0 %
      - Armament: 55 tons, 0.7 %
      - Armour Deck: 640 tons, 7.9 %
      - Conning Tower: 34 tons, 0.4 %
   Machinery: 2,392 tons, 29.5 %
   Hull, fittings & equipment: 3,132 tons, 38.6 %
   Fuel, ammunition & stores: 1,051 tons, 13.0 %
   Miscellaneous weights: 164 tons, 2.0 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     8,635 lbs / 3,917 Kg = 83.8 x 5.9 " / 150 mm shells or 1.2 torpedoes
   Stability (Unstable if below 1.00): 1.25
   Metacentric height 3.3 ft / 1.0 m
   Roll period: 13.3 seconds
   Steadiness   - As gun platform (Average = 50 %): 71 %
         - Recoil effect (Restricted arc if above 1.00): 0.37
   Seaboat quality  (Average = 1.00): 1.22

Hull form characteristics:
   Hull has low quarterdeck
   Block coefficient: 0.500
   Length to Beam Ratio: 10.00 : 1
   'Natural speed' for length: 23.96 kts
   Power going to wave formation at top speed: 53 %
   Trim (Max stability = 0, Max steadiness = 100): 58
   Bow angle (Positive = bow angles forward): 0.00 degrees
   Stern overhang: 0.00 ft / 0.00 m
   Freeboard (% = measuring location as a percentage of overall length):
      - Stem:      24.61 ft / 7.50 m
      - Forecastle (20 %):   21.33 ft / 6.50 m
      - Mid (50 %):      17.22 ft / 5.25 m
      - Quarterdeck (15 %):   11.48 ft / 3.50 m (17.22 ft / 5.25 m before break)
      - Stern:      11.48 ft / 3.50 m
      - Average freeboard:   18.06 ft / 5.51 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 112.2 %
      - Above water (accommodation/working, high = better): 158.1 %
   Waterplane Area: 21,963 Square feet or 2,040 Square metres
   Displacement factor (Displacement / loading): 111 %
   Structure weight / hull surface area: 92 lbs/sq ft or 451 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.98
      - Longitudinal: 1.16
      - Overall: 1.00
   Hull space for machinery, storage, compartmentation is cramped
   Room for accommodation and workspaces is excellent
   Ship has slow, easy roll, a good, steady gun platform
   Good seaboat, rides out heavy weather easily

[Sachmle]

The armor gremlin strikes again.  ;)

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   2.95" / 75 mm   418.44 ft / 127.54 m   9.84 ft / 3.00 m
   Ends:   Unarmoured
     Main Belt covers 112 % of normal length
     Main belt does not fully cover magazines and engineering spaces