Iberian 1907 Armored Cruiser

[Borys]

Ahoj!
Would it be possible to add 4 feet to the Upper Belt?
Then it would reach to the Weather deck, giving full proection to casemattes.
Borys

[miketr]

I have some time on my hands as Iberia is basicly on hold till the war ends.  So I am playing with my AC drawing some more.

Full Picture



Armor Layout



AC-1907e, Iberia Armored Cruiser laid down 1907 (Engine 1909)

Displacement:
   15,418 t light; 16,520 t standard; 18,273 t normal; 19,675 t full load

Dimensions: Length overall / water x beam x draught
   570.00 ft / 570.00 ft x 80.00 ft x 25.50 ft (normal load)
   173.74 m / 173.74 m x 24.38 m  x 7.77 m

Armament:
      6 - 9.84" / 250 mm guns (3x2 guns), 476.75lbs / 216.25kg shells, 1907 Model
     Breech loading guns in turrets (on barbettes)
     on centreline ends, majority forward, 1 raised mount - superfiring
      4 - 9.84" / 250 mm guns (2x2 guns), 476.75lbs / 216.25kg shells, 1907 Model
     Breech loading guns in turrets (on barbettes)
     on side, all amidships
      12 - 5.91" / 150 mm guns in single mounts, 102.98lbs / 46.71kg shells, 1907 Model
     Breech loading guns in casemate mounts
     on side, all amidships
     12 guns in hull casemates - Limited use in heavy seas
      8 - 2.95" / 75.0 mm guns in single mounts, 12.87lbs / 5.84kg shells, 1907 Model
     Quick firing guns in deck mounts
     on side, evenly spread, all raised mounts
      14 - 1.97" / 50.0 mm guns in single mounts, 3.81lbs / 1.73kg shells, 1907 Model
     Quick firing guns in deck mounts
     on side, evenly spread, 4 raised mounts
   Weight of broadside 6,160 lbs / 2,794 kg
   Shells per gun, main battery: 200
   4 - 20.0" / 508 mm submerged torpedo tubes

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   8.00" / 203 mm   370.50 ft / 112.93 m   14.73 ft / 4.49 m
   Ends:   4.00" / 102 mm   199.48 ft / 60.80 m   14.73 ft / 4.49 m
   Upper:   4.00" / 102 mm   370.50 ft / 112.93 m   10.00 ft / 3.05 m
     Main Belt covers 100 % of normal length

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   10.0" / 254 mm   8.00" / 203 mm      8.00" / 203 mm
   2nd:   10.0" / 254 mm   8.00" / 203 mm      8.00" / 203 mm
   3rd:   4.00" / 102 mm         -               -
   4th:   1.00" / 25 mm         -               -
   5th:   1.00" / 25 mm         -               -

   - Armour deck: 2.00" / 51 mm, Conning tower: 10.00" / 254 mm

Machinery:
   Coal and oil fired boilers, steam turbines,
   Direct drive, 4 shafts, 48,000 shp / 35,808 Kw = 24.80 kts
   Range 10,800nm at 10.00 kts
   Bunker at max displacement = 3,155 tons (67% coal)

Complement:
   785 - 1,021

Cost:
   £1.512 million / $6.047 million

Distribution of weights at normal displacement:
   Armament: 770 tons, 4.2 %
   Armour: 5,856 tons, 32.0 %
      - Belts: 2,956 tons, 16.2 %
      - Torpedo bulkhead: 0 tons, 0.0 %
      - Armament: 1,573 tons, 8.6 %
      - Armour Deck: 1,177 tons, 6.4 %
      - Conning Tower: 149 tons, 0.8 %
   Machinery: 2,323 tons, 12.7 %
   Hull, fittings & equipment: 6,436 tons, 35.2 %
   Fuel, ammunition & stores: 2,854 tons, 15.6 %
   Miscellaneous weights: 33 tons, 0.2 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     22,614 lbs / 10,257 Kg = 47.4 x 9.8 " / 250 mm shells or 2.7 torpedoes
   Stability (Unstable if below 1.00): 1.11
   Metacentric height 4.4 ft / 1.3 m
   Roll period: 16.1 seconds
   Steadiness   - As gun platform (Average = 50 %): 70 %
         - Recoil effect (Restricted arc if above 1.00): 0.49
   Seaboat quality  (Average = 1.00): 1.20

Hull form characteristics:
   Hull has a flush deck
   Block coefficient: 0.550
   Length to Beam Ratio: 7.13 : 1
   'Natural speed' for length: 23.87 kts
   Power going to wave formation at top speed: 50 %
   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:      23.71 ft / 7.23 m
      - Forecastle (20 %):   18.71 ft / 5.70 m
      - Mid (50 %):      16.71 ft / 5.09 m
      - Quarterdeck (15 %):   16.71 ft / 5.09 m
      - Stern:      16.71 ft / 5.09 m
      - Average freeboard:   17.81 ft / 5.43 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 78.6 %
      - Above water (accommodation/working, high = better): 132.6 %
   Waterplane Area: 31,824 Square feet or 2,957 Square metres
   Displacement factor (Displacement / loading): 109 %
   Structure weight / hull surface area: 141 lbs/sq ft or 691 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.96
      - Longitudinal: 1.38
      - Overall: 1.00
   Hull space for machinery, storage, compartmentation is excellent
   Room for accommodation and workspaces is excellent
   Ship has slow, easy roll, a good, steady gun platform
   Good seaboat, rides out heavy weather easily

[Borys]

Ahoj!
I'd love to have such ships ...

Possible weight savings:
- Main Battery ammunition - 120-150 is Da Bom'
- Other Gunhouse need not be 8 inches

Borys

[Borys]

With ALMOST 10 inch calibre, you can round off the shell weight to 500 lbs. Historically, this was the weight of the Italian 10 inch shell.

drools over design more ....

One flaw - make provision for 300 tonnes miscalenous weight.

Borys

[miketr]

With ALMOST 10 inch calibre, you can round off the shell weight to 500 lbs. Historically, this was the weight of the Italian 10 inch shell.

drools over design more ....

One flaw - make provision for 300 tonnes miscalenous weight.

Borys

For now I am not going to go into any real detail on shells.

Whenever the design is updated to all oil fired the design will aquire extra displacement for updating.

Michael