An Iberian Hood

[miketr]

Here is my crack at a 35,000 ton design.  Not saying I will build it, just playing around to see what my options are.  I need to build something after the two BB-1918's are done.

Someone had math to cover how much draught changes as the fuel bunkers are run dry.  What is that?

Michael

AC 1922-B, Iberia Armored Cruiser laid down 1922 (Engine 1920)

Displacement:
   34,999 t light; 36,633 t standard; 40,101 t normal; 42,876 t full load

Dimensions: Length overall / water x beam x draught
   787.40 ft / 787.40 ft x 98.43 ft x 30.18 ft (normal load)
   240.00 m / 240.00 m x 30.00 m  x 9.20 m

Armament:
      8 - 13.78" / 350 mm guns (4x2 guns), 1,308.20lbs / 593.39kg shells, 1922 Model
     Breech loading guns in turrets (on barbettes)
     on centreline ends, evenly spread, 2 raised mounts - superfiring
      16 - 5.91" / 150 mm guns (8x2 guns), 102.98lbs / 46.71kg shells, 1922 Model
     Breech loading guns in deck mounts with hoists
     on side, all amidships
      4 - 2.95" / 75.0 mm guns in single mounts, 12.87lbs / 5.84kg shells, 1922 Model
     Anti-aircraft guns in deck mounts
     on side, evenly spread, all raised mounts
      4 - 1.57" / 40.0 mm guns in single mounts, 1.95lbs / 0.89kg shells, 1922 Model
     Anti-aircraft guns in deck mounts
     on side, evenly spread, all raised mounts
   Weight of broadside 12,173 lbs / 5,521 kg
   Shells per gun, main battery: 120

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   12.6" / 320 mm   511.81 ft / 156.00 m   16.40 ft / 5.00 m
   Ends:   Unarmoured
   Upper:   9.84" / 250 mm   511.81 ft / 156.00 m   8.01 ft / 2.44 m
     Main Belt covers 100 % of normal length

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   12.6" / 320 mm   9.84" / 250 mm      12.6" / 320 mm
   2nd:   2.95" / 75 mm   1.97" / 50 mm      2.95" / 75 mm

   - Armour deck: 3.94" / 100 mm, Conning tower: 13.78" / 350 mm

Machinery:
   Oil fired boilers, steam turbines,
   Geared drive, 4 shafts, 140,000 shp / 104,440 Kw = 29.58 kts
   Range 16,930nm at 12.00 kts
   Bunker at max displacement = 6,244 tons

Complement:
   1,416 - 1,841

Cost:
   £8.696 million / $34.783 million

Distribution of weights at normal displacement:
   Armament: 1,522 tons, 3.8 %
   Armour: 13,654 tons, 34.0 %
      - Belts: 6,239 tons, 15.6 %
      - Torpedo bulkhead: 0 tons, 0.0 %
      - Armament: 2,938 tons, 7.3 %
      - Armour Deck: 4,128 tons, 10.3 %
      - Conning Tower: 348 tons, 0.9 %
   Machinery: 4,895 tons, 12.2 %
   Hull, fittings & equipment: 13,979 tons, 34.9 %
   Fuel, ammunition & stores: 5,102 tons, 12.7 %
   Miscellaneous weights: 950 tons, 2.4 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     54,145 lbs / 24,560 Kg = 41.4 x 13.8 " / 350 mm shells or 4.3 torpedoes
   Stability (Unstable if below 1.00): 1.10
   Metacentric height 5.8 ft / 1.8 m
   Roll period: 17.1 seconds
   Steadiness   - As gun platform (Average = 50 %): 56 %
         - Recoil effect (Restricted arc if above 1.00): 0.53
   Seaboat quality  (Average = 1.00): 1.11

Hull form characteristics:
   Hull has a flush deck
   Block coefficient: 0.600
   Length to Beam Ratio: 8.00 : 1
   'Natural speed' for length: 28.06 kts
   Power going to wave formation at top speed: 51 %
   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:      24.61 ft / 7.50 m
      - Forecastle (20 %):   22.31 ft / 6.80 m
      - Mid (50 %):      21.00 ft / 6.40 m
      - Quarterdeck (15 %):   20.01 ft / 6.10 m
      - Stern:      19.69 ft / 6.00 m
      - Average freeboard:   21.30 ft / 6.49 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 71.6 %
      - Above water (accommodation/working, high = better): 160.4 %
   Waterplane Area: 56,682 Square feet or 5,266 Square metres
   Displacement factor (Displacement / loading): 110 %
   Structure weight / hull surface area: 177 lbs/sq ft or 863 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.99
      - Longitudinal: 1.05
      - Overall: 1.00
   Hull space for machinery, storage, compartmentation is excellent
   Room for accommodation and workspaces is excellent

[Sachmle]

Full load-Normal load/Waterplane area in Meters= Draft change in meters.

[miketr]

Full load-Normal load/Waterplane area in Meters= Draft change in meters.

Full load is 42,876 tons, shouldn't it be bunker load at full load 6,244 tons?  Which is the difference between standard and full load?

Well assuming its fuel load / water plane area we get

6,244 tons / 5,266 = 1.185 meters.

With a 5 meter belt that seams functional. I could delete the upper belt all together and put in an even higher main belt but I want the upper belt if at all possible.

Michael

[Sachmle]

No idea, just rewriting the formula P3D posted earlier. I presume, based on his formula, that the difference between Normal and Full is extra fuel.

[Kaiser Kirk]

A  £8.696 million investment with no torpedo defenses? I'd trim that massive upper belt to make room.

[miketr]

A  £8.696 million investment with no torpedo defenses? I'd trim that massive upper belt to make room.

One always forgets something.

Michael

[miketr]

Fixed

AC 1922-B1, Iberia Armored Cruiser laid down 1922 (Engine 1920)

Displacement:
   35,001 t light; 36,595 t standard; 39,767 t normal; 42,305 t full load

Dimensions: Length overall / water x beam x draught
   787.40 ft / 787.40 ft x 98.43 ft x 30.18 ft (normal load)
   240.00 m / 240.00 m x 30.00 m  x 9.20 m

Armament:
      8 - 13.78" / 350 mm guns (4x2 guns), 1,308.20lbs / 593.39kg shells, 1922 Model
     Breech loading guns in turrets (on barbettes)
     on centreline ends, evenly spread, 2 raised mounts - superfiring
      12 - 5.91" / 150 mm guns (6x2 guns), 102.98lbs / 46.71kg shells, 1922 Model
     Breech loading guns in deck mounts with hoists
     on side, all amidships
      4 - 2.95" / 75.0 mm guns in single mounts, 12.87lbs / 5.84kg shells, 1922 Model
     Anti-aircraft guns in deck mounts
     on side, evenly spread, all raised mounts
      4 - 1.57" / 40.0 mm guns in single mounts, 1.95lbs / 0.88kg shells, 1922 Model
     Anti-aircraft guns in deck mounts
     on side, evenly spread, all raised mounts
   Weight of broadside 11,761 lbs / 5,335 kg
   Shells per gun, main battery: 120

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   12.6" / 320 mm   511.81 ft / 156.00 m   16.40 ft / 5.00 m
   Ends:   Unarmoured
   Upper:   9.84" / 250 mm   511.81 ft / 156.00 m   8.01 ft / 2.44 m
     Main Belt covers 100 % of normal length

   - Torpedo Bulkhead:
      1.57" / 40 mm   511.81 ft / 156.00 m   28.18 ft / 8.59 m

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   12.6" / 320 mm   9.84" / 250 mm      12.6" / 320 mm
   2nd:   2.95" / 75 mm   1.97" / 50 mm      2.95" / 75 mm

   - Armour deck: 3.94" / 100 mm, Conning tower: 13.78" / 350 mm

Machinery:
   Oil fired boilers, steam turbines,
   Geared drive, 4 shafts, 140,000 shp / 104,440 Kw = 29.63 kts
   Range 15,480nm at 12.00 kts
   Bunker at max displacement = 5,709 tons

Complement:
   1,407 - 1,830

Cost:
   £8.578 million / $34.311 million

Distribution of weights at normal displacement:
   Armament: 1,470 tons, 3.7 %
   Armour: 14,415 tons, 36.2 %
      - Belts: 6,240 tons, 15.7 %
      - Torpedo bulkhead: 840 tons, 2.1 %
      - Armament: 2,880 tons, 7.2 %
      - Armour Deck: 4,109 tons, 10.3 %
      - Conning Tower: 346 tons, 0.9 %
   Machinery: 4,895 tons, 12.3 %
   Hull, fittings & equipment: 13,855 tons, 34.8 %
   Fuel, ammunition & stores: 4,767 tons, 12.0 %
   Miscellaneous weights: 365 tons, 0.9 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     55,377 lbs / 25,119 Kg = 42.3 x 13.8 " / 350 mm shells or 8.0 torpedoes
   Stability (Unstable if below 1.00): 1.12
   Metacentric height 6.1 ft / 1.8 m
   Roll period: 16.8 seconds
   Steadiness   - As gun platform (Average = 50 %): 54 %
         - Recoil effect (Restricted arc if above 1.00): 0.50
   Seaboat quality  (Average = 1.00): 1.09

Hull form characteristics:
   Hull has a flush deck
   Block coefficient: 0.595
   Length to Beam Ratio: 8.00 : 1
   'Natural speed' for length: 28.06 kts
   Power going to wave formation at top speed: 51 %
   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:      24.61 ft / 7.50 m
      - Forecastle (20 %):   21.98 ft / 6.70 m
      - Mid (50 %):      20.67 ft / 6.30 m
      - Quarterdeck (15 %):   20.01 ft / 6.10 m
      - Stern:      19.69 ft / 6.00 m
      - Average freeboard:   21.10 ft / 6.43 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 87.5 %
      - Above water (accommodation/working, high = better): 158.8 %
   Waterplane Area: 56,418 Square feet or 5,241 Square metres
   Displacement factor (Displacement / loading): 109 %
   Structure weight / hull surface area: 176 lbs/sq ft or 860 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.99
      - Longitudinal: 1.01
      - Overall: 1.00
   Hull space for machinery, storage, compartmentation is adequate
   Room for accommodation and workspaces is excellent

[Jefgte]

Length 240m not 220 ??

[miketr]

Length 240m not 220 ??

Bilbao (astilleros Euskalduna, Astilleros del Nervion) has a type 4 slipway and a type 4 dry dock.

[miketr]

A Fastish BB design on the same displacement.

Michael

BB-1922-A, Iberia Battleship laid down 1922 (Engine 1920)

Displacement:
   35,001 t light; 36,984 t standard; 40,399 t normal; 43,131 t full load

Dimensions: Length overall / water x beam x draught
   711.94 ft / 711.94 ft x 101.71 ft x 31.50 ft (normal load)
   217.00 m / 217.00 m x 31.00 m  x 9.60 m

Armament:
      8 - 15.75" / 400 mm guns (4x2 guns), 1,952.76lbs / 885.76kg shells, 1922 Model
     Breech loading guns in turrets (on barbettes)
     on centreline ends, evenly spread, 2 raised mounts - superfiring
      16 - 5.91" / 150 mm guns (8x2 guns), 102.98lbs / 46.71kg shells, 1922 Model
     Breech loading guns in turrets (on barbettes)
     on side, all amidships
      4 - 2.95" / 75.0 mm guns in single mounts, 12.87lbs / 5.84kg shells, 1922 Model
     Anti-aircraft guns in deck mounts
     on side, evenly spread, all raised mounts
      4 - 1.57" / 40.0 mm guns in single mounts, 1.95lbs / 0.89kg shells, 1922 Model
     Anti-aircraft guns in deck mounts
     on side, evenly spread, all raised mounts
   Weight of broadside 17,329 lbs / 7,860 kg
   Shells per gun, main battery: 120

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   13.8" / 350 mm   447.83 ft / 136.50 m   16.40 ft / 5.00 m
   Ends:   Unarmoured
     Main Belt covers 97 % of normal length

   - Torpedo Bulkhead:
      1.97" / 50 mm   447.83 ft / 136.50 m   27.85 ft / 8.49 m

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   13.8" / 350 mm   11.8" / 300 mm      13.8" / 350 mm
   2nd:   5.91" / 150 mm   2.95" / 75 mm      5.91" / 150 mm

   - Armour deck: 4.72" / 120 mm, Conning tower: 14.96" / 380 mm

Machinery:
   Oil fired boilers, steam turbines,
   Geared drive, 4 shafts, 80,000 shp / 59,680 Kw = 25.24 kts
   Range 16,910nm at 12.00 kts
   Bunker at max displacement = 6,146 tons

Complement:
   1,424 - 1,852

Cost:
   £9.371 million / $37.486 million

Distribution of weights at normal displacement:
   Armament: 2,166 tons, 5.4 %
   Armour: 14,695 tons, 36.4 %
      - Belts: 4,422 tons, 10.9 %
      - Torpedo bulkhead: 909 tons, 2.2 %
      - Armament: 4,269 tons, 10.6 %
      - Armour Deck: 4,716 tons, 11.7 %
      - Conning Tower: 379 tons, 0.9 %
   Machinery: 2,797 tons, 6.9 %
   Hull, fittings & equipment: 14,593 tons, 36.1 %
   Fuel, ammunition & stores: 5,398 tons, 13.4 %
   Miscellaneous weights: 750 tons, 1.9 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     56,408 lbs / 25,586 Kg = 28.9 x 15.7 " / 400 mm shells or 8.9 torpedoes
   Stability (Unstable if below 1.00): 1.10
   Metacentric height 6.2 ft / 1.9 m
   Roll period: 17.2 seconds
   Steadiness   - As gun platform (Average = 50 %): 51 %
         - Recoil effect (Restricted arc if above 1.00): 0.62
   Seaboat quality  (Average = 1.00): 1.21

Hull form characteristics:
   Hull has a flush deck
   Block coefficient: 0.620
   Length to Beam Ratio: 7.00 : 1
   'Natural speed' for length: 26.68 kts
   Power going to wave formation at top speed: 48 %
   Trim (Max stability = 0, Max steadiness = 100): 42
   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:      22.97 ft / 7.00 m
      - Forecastle (20 %):   21.33 ft / 6.50 m
      - Mid (50 %):      19.69 ft / 6.00 m
      - Quarterdeck (15 %):   18.86 ft / 5.75 m
      - Stern:      18.04 ft / 5.50 m
      - Average freeboard:   20.06 ft / 6.12 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 81.9 %
      - Above water (accommodation/working, high = better): 143.2 %
   Waterplane Area: 53,955 Square feet or 5,013 Square metres
   Displacement factor (Displacement / loading): 105 %
   Structure weight / hull surface area: 197 lbs/sq ft or 964 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.97
      - Longitudinal: 1.21
      - Overall: 1.00
   Hull space for machinery, storage, compartmentation is excellent
   Room for accommodation and workspaces is excellent
   Good seaboat, rides out heavy weather easily

[mentat]

a nice superior QE

- but any way to up the steadiness?

[miketr]

a nice superior QE

- but any way to up the steadiness?

Short of a new design only at the cost of stability.

Michael

[Jefgte]

A stronger QE

Armour:
  - Belts:      Width (max)   Length (avg)      Height (avg)
  Main:   13.8" / 350 mm   447.83 ft / 136.50 m   16.40 ft / 5.00 m
  Ends:   Unarmoured
    Main Belt covers 97 % of normal length

Ends:   Unarmoured

All or nothing...That's really NOTHING  ???


Jef  ;)

[snip]

I like it, maybe I should do one for the MK...

[mentat]

  re the steadiness - I was thinking increase beam + reduce draft - gives more stability to trade-off with ..

    - but maybe you have some docking restrictions on beam ?

     re the End Belt - Protection is already 36% - something has to give