Iberian Cruisers

[miketr]

The reduced gun version... Also adjusted the armor to giver better coverage of the hull.

Michael

AC-1918d, Iberia Cruiser laid down 1918 (Engine 1916)

Displacement:
   12,900 t light; 13,649 t standard; 14,891 t normal; 15,885 t full load

Dimensions: Length overall / water x beam x draught
   554.64 ft / 551.18 ft x 72.18 ft x 23.95 ft (normal load)
   169.05 m / 168.00 m x 22.00 m  x 7.30 m

Armament:
      8 - 9.84" / 250 mm guns (4x2 guns), 476.75lbs / 216.25kg shells, 1918 Model
     Breech loading guns in turrets (on barbettes)
     on centreline ends, evenly spread, 2 raised mounts - superfiring
      12 - 4.72" / 120 mm guns (6x2 guns), 52.72lbs / 23.92kg shells, 1918 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, 1918 Model
     Breech loading guns in deck mounts
     on centreline, all amidships, all raised mounts - superfiring
      4 - 1.57" / 40.0 mm guns in single mounts, 1.95lbs / 0.89kg shells, 1918 Model
     Anti-aircraft guns in deck mounts
     on side, evenly spread, all raised mounts
   Weight of broadside 4,485 lbs / 2,034 kg
   Shells per gun, main battery: 175
   4 - 20.0" / 508 mm above water torpedoes

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   5.91" / 150 mm   325.46 ft / 99.20 m   10.50 ft / 3.20 m
   Ends:   2.95" / 75 mm   225.69 ft / 68.79 m   10.50 ft / 3.20 m
   Upper:   3.94" / 100 mm   358.27 ft / 109.20 m   13.12 ft / 4.00 m
     Main Belt covers 91 % of normal length

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   5.91" / 150 mm   4.72" / 120 mm      5.91" / 150 mm
   2nd:   2.95" / 75 mm   1.97" / 50 mm      2.95" / 75 mm
   3rd:   0.98" / 25 mm         -               -
   4th:   0.98" / 25 mm         -               -

   - Armour deck: 1.97" / 50 mm, Conning tower: 5.91" / 150 mm

Machinery:
   Oil fired boilers, steam turbines,
   Geared drive, 4 shafts, 68,751 shp / 51,288 Kw = 28.00 kts
   Range 14,490nm at 10.00 kts
   Bunker at max displacement = 2,236 tons

Complement:
   673 - 876

Cost:
   £2.562 million / $10.248 million

Distribution of weights at normal displacement:
   Armament: 561 tons, 3.8 %
   Armour: 3,946 tons, 26.5 %
      - Belts: 1,931 tons, 13.0 %
      - Torpedo bulkhead: 0 tons, 0.0 %
      - Armament: 929 tons, 6.2 %
      - Armour Deck: 1,008 tons, 6.8 %
      - Conning Tower: 77 tons, 0.5 %
   Machinery: 2,562 tons, 17.2 %
   Hull, fittings & equipment: 5,532 tons, 37.1 %
   Fuel, ammunition & stores: 1,991 tons, 13.4 %
   Miscellaneous weights: 300 tons, 2.0 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     17,813 lbs / 8,080 Kg = 37.4 x 9.8 " / 250 mm shells or 2.1 torpedoes
   Stability (Unstable if below 1.00): 1.08
   Metacentric height 3.6 ft / 1.1 m
   Roll period: 16.0 seconds
   Steadiness   - As gun platform (Average = 50 %): 50 %
         - Recoil effect (Restricted arc if above 1.00): 0.62
   Seaboat quality  (Average = 1.00): 1.02

Hull form characteristics:
   Hull has a flush deck
   Block coefficient: 0.547
   Length to Beam Ratio: 7.64 : 1
   'Natural speed' for length: 23.48 kts
   Power going to wave formation at top speed: 57 %
   Trim (Max stability = 0, Max steadiness = 100): 49
   Bow angle (Positive = bow angles forward): 8.00 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 %):   20.51 ft / 6.25 m
      - Mid (50 %):      19.69 ft / 6.00 m
      - Quarterdeck (15 %):   18.04 ft / 5.50 m
      - Stern:      18.04 ft / 5.50 m
      - Average freeboard:   19.77 ft / 6.03 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 88.0 %
      - Above water (accommodation/working, high = better): 142.7 %
   Waterplane Area: 27,687 Square feet or 2,572 Square metres
   Displacement factor (Displacement / loading): 107 %
   Structure weight / hull surface area: 132 lbs/sq ft or 646 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.95
      - Longitudinal: 1.56
      - Overall: 1.00
   Hull space for machinery, storage, compartmentation is adequate
   Room for accommodation and workspaces is excellent

[Jefgte]

12 - 4.72" / 120 mm guns (6x2 guns), 52.72lbs / 23.92kg shells, 1918 Model
     Breech loading guns in deck mounts with hoists
     on side, all amidships

When the guns are concentrated on the same space, a hit could disable 2 or 3 guns...

Prefer "on side, evenly spread"

...I note also the range " from Malaga to Manilla "


;)

[miketr]

Just an attempt to see whats needed to achieve 30 knots on the base design...

AC-1918e, Iberia Cruiser laid down 1918 (Engine 1916)

Displacement:
   15,001 t light; 15,796 t standard; 17,213 t normal; 18,347 t full load

Dimensions: Length overall / water x beam x draught
   594.24 ft / 590.55 ft x 75.46 ft x 24.93 ft (normal load)
   181.12 m / 180.00 m x 23.00 m  x 7.60 m

Armament:
      8 - 9.84" / 250 mm guns (4x2 guns), 476.75lbs / 216.25kg shells, 1918 Model
     Breech loading guns in turrets (on barbettes)
     on centreline ends, evenly spread, 2 raised mounts - superfiring
      12 - 4.72" / 120 mm guns (6x2 guns), 52.72lbs / 23.91kg shells, 1918 Model
     Breech loading guns in deck mounts with hoists
     on side, evenly spread
      8 - 1.97" / 50.0 mm guns in single mounts, 3.81lbs / 1.73kg shells, 1918 Model
     Breech loading guns in deck mounts
     on centreline, all amidships, all raised mounts - superfiring
      4 - 1.57" / 40.0 mm guns in single mounts, 1.95lbs / 0.88kg shells, 1918 Model
     Anti-aircraft guns in deck mounts
     on side, evenly spread, all raised mounts
   Weight of broadside 4,485 lbs / 2,034 kg
   Shells per gun, main battery: 175
   4 - 20.0" / 508 mm above water torpedoes

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   5.91" / 150 mm   383.86 ft / 117.00 m   10.43 ft / 3.18 m
   Ends:   2.95" / 75 mm   206.66 ft / 62.99 m   10.43 ft / 3.18 m
   Upper:   1.97" / 50 mm   383.86 ft / 117.00 m   21.33 ft / 6.50 m
     Main Belt covers 100 % of normal length

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   5.91" / 150 mm   4.72" / 120 mm      5.91" / 150 mm
   2nd:   2.95" / 75 mm   1.97" / 50 mm      2.95" / 75 mm
   3rd:   0.98" / 25 mm         -               -
   4th:   0.98" / 25 mm         -               -

   - Armour deck: 1.97" / 50 mm, Conning tower: 5.91" / 150 mm

Machinery:
   Oil fired boilers, steam turbines,
   Geared drive, 4 shafts, 96,136 shp / 71,718 Kw = 30.00 kts
   Range 15,000nm at 10.00 kts
   Bunker at max displacement = 2,551 tons

Complement:
   750 - 976

Cost:
   £2.995 million / $11.979 million

Distribution of weights at normal displacement:
   Armament: 561 tons, 3.3 %
   Armour: 4,131 tons, 24.0 %
      - Belts: 1,933 tons, 11.2 %
      - Torpedo bulkhead: 0 tons, 0.0 %
      - Armament: 989 tons, 5.7 %
      - Armour Deck: 1,124 tons, 6.5 %
      - Conning Tower: 85 tons, 0.5 %
   Machinery: 3,582 tons, 20.8 %
   Hull, fittings & equipment: 6,427 tons, 37.3 %
   Fuel, ammunition & stores: 2,213 tons, 12.9 %
   Miscellaneous weights: 300 tons, 1.7 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     19,927 lbs / 9,039 Kg = 41.8 x 9.8 " / 250 mm shells or 2.1 torpedoes
   Stability (Unstable if below 1.00): 1.11
   Metacentric height 4.0 ft / 1.2 m
   Roll period: 15.9 seconds
   Steadiness   - As gun platform (Average = 50 %): 51 %
         - Recoil effect (Restricted arc if above 1.00): 0.56
   Seaboat quality  (Average = 1.00): 1.01

Hull form characteristics:
   Hull has a flush deck
   Block coefficient: 0.542
   Length to Beam Ratio: 7.83 : 1
   'Natural speed' for length: 24.30 kts
   Power going to wave formation at top speed: 58 %
   Trim (Max stability = 0, Max steadiness = 100): 50
   Bow angle (Positive = bow angles forward): 8.00 degrees
   Stern overhang: 0.00 ft / 0.00 m
   Freeboard (% = measuring location as a percentage of overall length):
      - Stem:      26.25 ft / 8.00 m
      - Forecastle (20 %):   23.79 ft / 7.25 m
      - Mid (50 %):      21.33 ft / 6.50 m
      - Quarterdeck (15 %):   19.69 ft / 6.00 m
      - Stern:      18.86 ft / 5.75 m
      - Average freeboard:   21.79 ft / 6.64 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 95.4 %
      - Above water (accommodation/working, high = better): 158.8 %
   Waterplane Area: 30,873 Square feet or 2,868 Square metres
   Displacement factor (Displacement / loading): 107 %
   Structure weight / hull surface area: 136 lbs/sq ft or 664 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.95
      - Longitudinal: 1.58
      - Overall: 1.00
   Hull space for machinery, storage, compartmentation is adequate
   Room for accommodation and workspaces is excellent

[The Rock Doctor]

I like, other than the main belt height.  Have you considered trimming the deck to 40mm and increasing the height of the main belt some?

[miketr]

Main belt is now 4 meters in height in place of the 3.1 on the previous design.  I optimized the ship a little bit and only pushed displacement up a very tiny amount to keep the 50mm deck.  I also ditched the 50mm battery all together and put some 12.5mm machine guns in their place.  Problem is its a VERY large ship.

Michael

AC-1918e1, Iberia Cruiser laid down 1918 (Engine 1916)

Displacement:
   15,025 t light; 15,752 t standard; 17,207 t normal; 18,371 t full load

Dimensions: Length overall / water x beam x draught
   594.24 ft / 590.55 ft x 75.46 ft x 24.93 ft (normal load)
   181.12 m / 180.00 m x 23.00 m  x 7.60 m

Armament:
      8 - 9.84" / 250 mm guns (4x2 guns), 476.75lbs / 216.25kg shells, 1918 Model
     Breech loading guns in turrets (on barbettes)
     on centreline ends, evenly spread, 2 raised mounts - superfiring
      12 - 4.72" / 120 mm guns (6x2 guns), 52.72lbs / 23.91kg shells, 1918 Model
     Breech loading guns in deck mounts with hoists
     on side, evenly spread
      4 - 0.49" / 12.5 mm guns in single mounts, 0.06lbs / 0.03kg shells, 1918 Model
     Machine guns in deck mounts
     on centreline, all amidships, all raised mounts - superfiring
      4 - 1.57" / 40.0 mm guns in single mounts, 1.95lbs / 0.88kg shells, 1918 Model
     Anti-aircraft guns in deck mounts
     on side, evenly spread, all raised mounts
   Weight of broadside 4,455 lbs / 2,021 kg
   Shells per gun, main battery: 150
   4 - 20.0" / 508 mm above water torpedoes

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   5.91" / 150 mm   364.17 ft / 111.00 m   13.12 ft / 4.00 m
   Ends:   2.95" / 75 mm   226.35 ft / 68.99 m   13.12 ft / 4.00 m
   Upper:   1.97" / 50 mm   364.17 ft / 111.00 m   14.76 ft / 4.50 m
     Main Belt covers 95 % of normal length

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   5.91" / 150 mm   4.72" / 120 mm      5.91" / 150 mm
   2nd:   2.95" / 75 mm   1.97" / 50 mm      2.95" / 75 mm
   3rd:   0.98" / 25 mm         -               -
   4th:   0.98" / 25 mm         -               -

   - Armour deck: 1.97" / 50 mm, Conning tower: 5.91" / 150 mm

Machinery:
   Oil fired boilers, steam turbines,
   Geared drive, 4 shafts, 96,105 shp / 71,694 Kw = 30.00 kts
   Range 15,430nm at 10.00 kts
   Bunker at max displacement = 2,619 tons

Complement:
   750 - 976

Cost:
   £2.990 million / $11.959 million

Distribution of weights at normal displacement:
   Armament: 557 tons, 3.2 %
   Armour: 4,189 tons, 24.3 %
      - Belts: 1,998 tons, 11.6 %
      - Torpedo bulkhead: 0 tons, 0.0 %
      - Armament: 982 tons, 5.7 %
      - Armour Deck: 1,124 tons, 6.5 %
      - Conning Tower: 85 tons, 0.5 %
   Machinery: 3,581 tons, 20.8 %
   Hull, fittings & equipment: 6,398 tons, 37.2 %
   Fuel, ammunition & stores: 2,182 tons, 12.7 %
   Miscellaneous weights: 300 tons, 1.7 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     20,000 lbs / 9,072 Kg = 42.0 x 9.8 " / 250 mm shells or 2.1 torpedoes
   Stability (Unstable if below 1.00): 1.11
   Metacentric height 4.0 ft / 1.2 m
   Roll period: 15.8 seconds
   Steadiness   - As gun platform (Average = 50 %): 50 %
         - Recoil effect (Restricted arc if above 1.00): 0.55
   Seaboat quality  (Average = 1.00): 1.00

Hull form characteristics:
   Hull has a flush deck
   Block coefficient: 0.542
   Length to Beam Ratio: 7.83 : 1
   'Natural speed' for length: 24.30 kts
   Power going to wave formation at top speed: 58 %
   Trim (Max stability = 0, Max steadiness = 100): 50
   Bow angle (Positive = bow angles forward): 8.00 degrees
   Stern overhang: 0.00 ft / 0.00 m
   Freeboard (% = measuring location as a percentage of overall length):
      - Stem:      26.25 ft / 8.00 m
      - Forecastle (20 %):   23.79 ft / 7.25 m
      - Mid (50 %):      21.33 ft / 6.50 m
      - Quarterdeck (15 %):   19.69 ft / 6.00 m
      - Stern:      18.86 ft / 5.75 m
      - Average freeboard:   21.79 ft / 6.64 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 94.8 %
      - Above water (accommodation/working, high = better): 158.7 %
   Waterplane Area: 30,868 Square feet or 2,868 Square metres
   Displacement factor (Displacement / loading): 107 %
   Structure weight / hull surface area: 135 lbs/sq ft or 661 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.95
      - Longitudinal: 1.56
      - Overall: 1.00
   Hull space for machinery, storage, compartmentation is adequate
   Room for accommodation and workspaces is excellent

[The Rock Doctor]

Yes, it is, but I think the results are worth it.

[miketr]

A smaller cruiser to provide some numbers and be tougher than the pop corn cruisers I have been building up to now.  Could build 3 of these a half.

Michael

PC-1918, Iberia Protected Cruiser laid down 1918 (Engine 1916)

Displacement:
   5,000 t light; 5,195 t standard; 5,676 t normal; 6,060 t full load

Dimensions: Length overall / water x beam x draught
   492.13 ft / 492.13 ft x 49.21 ft x 16.40 ft (normal load)
   150.00 m / 150.00 m x 15.00 m  x 5.00 m

Armament:
      8 - 5.91" / 150 mm guns (4x2 guns), 102.98lbs / 46.71kg shells, 1918 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, 1918 Model
     Quick firing guns in deck mounts
     on side, all amidships
      4 - 1.57" / 40.0 mm guns in single mounts, 1.95lbs / 0.88kg shells, 1918 Model
     Anti-aircraft guns in deck mounts
     on side, all amidships, all raised mounts - superfiring
   Weight of broadside 935 lbs / 424 kg
   Shells per gun, main battery: 150
   6 - 21.0" / 533.4 mm above water torpedoes

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   4.72" / 120 mm   319.88 ft / 97.50 m   10.17 ft / 3.10 m
   Ends:   Unarmoured
     Main Belt covers 100 % of normal length
     Main belt does not fully cover magazines and engineering spaces

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

   - Armour deck: 1.57" / 40 mm, Conning tower: 4.72" / 120 mm

Machinery:
   Oil fired boilers, steam turbines,
   Geared drive, 3 shafts, 39,000 shp / 29,094 Kw = 28.28 kts
   Range 9,750nm at 10.00 kts
   Bunker at max displacement = 866 tons

Complement:
   326 - 425

Cost:
   £0.953 million / $3.812 million

Distribution of weights at normal displacement:
   Armament: 117 tons, 2.1 %
   Armour: 1,247 tons, 22.0 %
      - Belts: 640 tons, 11.3 %
      - Torpedo bulkhead: 0 tons, 0.0 %
      - Armament: 105 tons, 1.9 %
      - Armour Deck: 470 tons, 8.3 %
      - Conning Tower: 32 tons, 0.6 %
   Machinery: 1,453 tons, 25.6 %
   Hull, fittings & equipment: 2,097 tons, 36.9 %
   Fuel, ammunition & stores: 676 tons, 11.9 %
   Miscellaneous weights: 86 tons, 1.5 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     6,889 lbs / 3,125 Kg = 66.9 x 5.9 " / 150 mm shells or 1.2 torpedoes
   Stability (Unstable if below 1.00): 1.25
   Metacentric height 2.6 ft / 0.8 m
   Roll period: 12.8 seconds
   Steadiness   - As gun platform (Average = 50 %): 56 %
         - Recoil effect (Restricted arc if above 1.00): 0.36
   Seaboat quality  (Average = 1.00): 1.12

Hull form characteristics:
   Hull has a flush deck
   Block coefficient: 0.500
   Length to Beam Ratio: 10.00 : 1
   'Natural speed' for length: 22.18 kts
   Power going to wave formation at top speed: 54 %
   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 (% = measuring location as a percentage of overall length):
      - Stem:      19.69 ft / 6.00 m
      - Forecastle (20 %):   16.40 ft / 5.00 m
      - Mid (50 %):      14.76 ft / 4.50 m
      - Quarterdeck (15 %):   13.94 ft / 4.25 m
      - Stern:      13.94 ft / 4.25 m
      - Average freeboard:   15.33 ft / 4.67 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): 116.7 %
   Waterplane Area: 16,136 Square feet or 1,499 Square metres
   Displacement factor (Displacement / loading): 110 %
   Structure weight / hull surface area: 82 lbs/sq ft or 402 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.98
      - Longitudinal: 1.20
      - Overall: 1.00
   Hull space for machinery, storage, compartmentation is adequate
   Room for accommodation and workspaces is adequate

[miketr]

Helps if you cover the mags etc...

PC-1918, Iberia Protected Cruiser laid down 1918 (Engine 1916)

Displacement:
   5,000 t light; 5,195 t standard; 5,676 t normal; 6,060 t full load

Dimensions: Length overall / water x beam x draught
   492.13 ft / 492.13 ft x 49.21 ft x 16.40 ft (normal load)
   150.00 m / 150.00 m x 15.00 m  x 5.00 m

Armament:
      8 - 5.91" / 150 mm guns (4x2 guns), 102.98lbs / 46.71kg shells, 1918 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, 1918 Model
     Quick firing guns in deck mounts
     on side, all amidships
      4 - 1.57" / 40.0 mm guns in single mounts, 1.95lbs / 0.88kg shells, 1918 Model
     Anti-aircraft guns in deck mounts
     on side, all amidships, all raised mounts - superfiring
   Weight of broadside 935 lbs / 424 kg
   Shells per gun, main battery: 150
   6 - 21.0" / 533.4 mm above water torpedoes

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   4.72" / 120 mm   324.80 ft / 99.00 m   10.17 ft / 3.10 m
   Ends:   Unarmoured
     Main Belt covers 102 % of normal length

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

   - Armour deck: 1.57" / 40 mm, Conning tower: 4.72" / 120 mm

Machinery:
   Oil fired boilers, steam turbines,
   Geared drive, 3 shafts, 39,000 shp / 29,094 Kw = 28.28 kts
   Range 9,750nm at 10.00 kts
   Bunker at max displacement = 866 tons

Complement:
   326 - 425

Cost:
   £0.953 million / $3.812 million

Distribution of weights at normal displacement:
   Armament: 117 tons, 2.1 %
   Armour: 1,256 tons, 22.1 %
      - Belts: 648 tons, 11.4 %
      - Torpedo bulkhead: 0 tons, 0.0 %
      - Armament: 105 tons, 1.9 %
      - Armour Deck: 470 tons, 8.3 %
      - Conning Tower: 32 tons, 0.6 %
   Machinery: 1,453 tons, 25.6 %
   Hull, fittings & equipment: 2,088 tons, 36.8 %
   Fuel, ammunition & stores: 676 tons, 11.9 %
   Miscellaneous weights: 86 tons, 1.5 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     6,863 lbs / 3,113 Kg = 66.6 x 5.9 " / 150 mm shells or 1.2 torpedoes
   Stability (Unstable if below 1.00): 1.25
   Metacentric height 2.6 ft / 0.8 m
   Roll period: 12.8 seconds
   Steadiness   - As gun platform (Average = 50 %): 56 %
         - Recoil effect (Restricted arc if above 1.00): 0.36
   Seaboat quality  (Average = 1.00): 1.12

Hull form characteristics:
   Hull has a flush deck
   Block coefficient: 0.500
   Length to Beam Ratio: 10.00 : 1
   'Natural speed' for length: 22.18 kts
   Power going to wave formation at top speed: 54 %
   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 (% = measuring location as a percentage of overall length):
      - Stem:      19.69 ft / 6.00 m
      - Forecastle (20 %):   16.40 ft / 5.00 m
      - Mid (50 %):      14.76 ft / 4.50 m
      - Quarterdeck (15 %):   13.94 ft / 4.25 m
      - Stern:      13.94 ft / 4.25 m
      - Average freeboard:   15.33 ft / 4.67 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): 116.7 %
   Waterplane Area: 16,136 Square feet or 1,499 Square metres
   Displacement factor (Displacement / loading): 110 %
   Structure weight / hull surface area: 82 lbs/sq ft or 400 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.98
      - Longitudinal: 1.20
      - Overall: 1.00
   Hull space for machinery, storage, compartmentation is adequate
   Room for accommodation and workspaces is adequate

[sgdn]

just 2 dim questions

isnt 1.25 stabilty a bit high even for ship intended to run around the stomyer areas?

why 28.25 knts max ?

and lastley

i like it

[miketr]

I could shove over the stability bar to get the 70+ steadiness and still have over 1.1 stability its just where the center setting came out to.

28.2833 knots is what 39,000 SHP comes out to.  If possible I like to do round SHP numbers; one of things I miss about older versions of SS.

Michael

[Sachmle]

I agree w/ sgdn..I Like It!!..also if you liked the shp setting in older SS versions you'll like SS3 once it's finally done, it has a power setting OR a speed setting. You can input either number and it figures the second for you.

[miketr]

Only bad thing is I don't think the belt gives enough protection. I am debating lowering the belt to 100mm and increasing the height.

Cool to know on SS3 and SHP.

Michael

[miketr]

100mm belt gives me 12' of height vs. 10' before and 75mm belt gives me 16' of height.  Will have to think things over.

Michael

PC-1918a, Iberia Protected Cruiser laid down 1918 (Engine 1916)

Displacement:
   5,000 t light; 5,195 t standard; 5,676 t normal; 6,060 t full load

Dimensions: Length overall / water x beam x draught
   492.13 ft / 492.13 ft x 49.21 ft x 16.40 ft (normal load)
   150.00 m / 150.00 m x 15.00 m  x 5.00 m

Armament:
      8 - 5.91" / 150 mm guns (4x2 guns), 102.98lbs / 46.71kg shells, 1918 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, 1918 Model
     Quick firing guns in deck mounts
     on side, all amidships
      4 - 1.57" / 40.0 mm guns in single mounts, 1.95lbs / 0.88kg shells, 1918 Model
     Anti-aircraft guns in deck mounts
     on side, all amidships, all raised mounts - superfiring
   Weight of broadside 935 lbs / 424 kg
   Shells per gun, main battery: 150
   6 - 21.0" / 533.4 mm above water torpedoes

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   3.94" / 100 mm   324.80 ft / 99.00 m   12.14 ft / 3.70 m
   Ends:   Unarmoured
     Main Belt covers 102 % of normal length

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

   - Armour deck: 1.57" / 40 mm, Conning tower: 4.72" / 120 mm

Machinery:
   Oil fired boilers, steam turbines,
   Geared drive, 3 shafts, 39,000 shp / 29,094 Kw = 28.28 kts
   Range 9,750nm at 10.00 kts
   Bunker at max displacement = 866 tons

Complement:
   326 - 425

Cost:
   £0.953 million / $3.812 million

Distribution of weights at normal displacement:
   Armament: 117 tons, 2.1 %
   Armour: 1,252 tons, 22.1 %
      - Belts: 644 tons, 11.4 %
      - Torpedo bulkhead: 0 tons, 0.0 %
      - Armament: 105 tons, 1.9 %
      - Armour Deck: 470 tons, 8.3 %
      - Conning Tower: 32 tons, 0.6 %
   Machinery: 1,453 tons, 25.6 %
   Hull, fittings & equipment: 2,092 tons, 36.9 %
   Fuel, ammunition & stores: 676 tons, 11.9 %
   Miscellaneous weights: 86 tons, 1.5 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     6,546 lbs / 2,969 Kg = 63.6 x 5.9 " / 150 mm shells or 1.2 torpedoes
   Stability (Unstable if below 1.00): 1.14
   Metacentric height 2.2 ft / 0.7 m
   Roll period: 14.0 seconds
   Steadiness   - As gun platform (Average = 50 %): 71 %
         - Recoil effect (Restricted arc if above 1.00): 0.44
   Seaboat quality  (Average = 1.00): 1.12

Hull form characteristics:
   Hull has a flush deck
   Block coefficient: 0.500
   Length to Beam Ratio: 10.00 : 1
   'Natural speed' for length: 22.18 kts
   Power going to wave formation at top speed: 54 %
   Trim (Max stability = 0, Max steadiness = 100): 64
   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:      19.69 ft / 6.00 m
      - Forecastle (20 %):   16.40 ft / 5.00 m
      - Mid (50 %):      14.76 ft / 4.50 m
      - Quarterdeck (15 %):   13.94 ft / 4.25 m
      - Stern:      13.94 ft / 4.25 m
      - Average freeboard:   15.33 ft / 4.67 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): 116.7 %
   Waterplane Area: 16,136 Square feet or 1,499 Square metres
   Displacement factor (Displacement / loading): 110 %
   Structure weight / hull surface area: 82 lbs/sq ft or 401 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.98
      - Longitudinal: 1.20
      - Overall: 1.00
   Hull space for machinery, storage, compartmentation is adequate
   Room for accommodation and workspaces is adequate
   Ship has slow, easy roll, a good, steady gun platform

[maddox]

3" belt on such a cruiser is still respectable, and the height more useable.

She's a good adversary to the Demarce III cruisers, both types.

[Borys]

Ahoj!
Yup - 3" is plenty. Save the 4" belts for cruisers displacing 10K+ tonnes.
Borys