Which, if any of these would you build?

[The Rock Doctor]

The AC is a good design if you go that route.  

If Brown's got a hexagonal turret arrangement, I'd really favor an intermediate hull with the arrangement of Ovideo and the protection of Brown.  However, it'd be more effective to integrate the necessary BB tech from Gran Colombia in 1913 to build an all-centreline design - either with eight guns or something resembling the Triunfantes.  You'd still meet your 1914 lay-down date.

[Sachmle]

And here's that design.

Coronel Oviedo, NUS Battleship laid down 1914 (Engine 1912)

Displacement:
   20,405 t light; 21,541 t standard; 22,588 t normal; 23,426 t full load

Dimensions: Length overall / water x beam x draught
   557.00 ft / 554.00 ft x 92.40 ft x 28.00 ft (normal load)
   169.77 m / 168.86 m x 28.16 m  x 8.53 m

Armament:
      4 - 12.00" / 305 mm guns (2x2 guns), 1,045.00lbs / 474.00kg shells, 1914 Model
     Breech loading guns in turrets (on barbettes)
     on centreline ends, evenly spread
      4 - 12.00" / 305 mm guns (2x2 guns), 1,045.00lbs / 474.00kg shells, 1914 Model
     Breech loading guns in turrets (on barbettes)
     on centreline, all amidships
      20 - 6.00" / 152 mm guns in single mounts, 100.00lbs / 45.36kg shells, 1914 Model
     Breech loading guns in casemate mounts
     on side ends, evenly spread
     20 guns in hull casemates - Limited use in heavy seas
      8 - 3.00" / 76.2 mm guns in single mounts, 13.50lbs / 6.12kg shells, 1914 Model
     Quick firing guns in deck mounts
     on centreline, evenly spread, all raised mounts
   Weight of broadside 10,468 lbs / 4,748 kg
   Shells per gun, main battery: 110
   4 - 18.0" / 457.2 mm submerged torpedo tubes

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   12.0" / 305 mm   360.00 ft / 109.73 m   16.00 ft / 4.88 m
   Ends:   8.00" / 203 mm   194.00 ft / 59.13 m   12.00 ft / 3.66 m
   Upper:   8.00" / 203 mm   360.00 ft / 109.73 m   8.00 ft / 2.44 m
     Main Belt covers 100 % of normal length

   - Torpedo Bulkhead:
      1.50" / 38 mm   360.00 ft / 109.73 m   32.00 ft / 9.75 m

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   13.0" / 330 mm   6.00" / 152 mm      12.0" / 305 mm
   2nd:   13.0" / 330 mm   6.00" / 152 mm      12.0" / 305 mm
   3rd:   6.00" / 152 mm   4.00" / 102 mm      1.00" / 25 mm

   - Armour deck: 3.50" / 89 mm, Conning tower: 12.00" / 305 mm

Machinery:
   Coal and oil fired boilers, steam turbines,
   Electric motors, 2 shafts, 24,581 shp / 18,337 Kw = 20.00 kts
   Range 6,500nm at 10.00 kts
   Bunker at max displacement = 1,885 tons (58% coal)

Complement:
   920 - 1,197

Cost:
   £2.320 million / $9.280 million

Distribution of weights at normal displacement:
   Armament: 1,148 tons, 5.1 %
   Armour: 9,905 tons, 43.9 %
      - Belts: 4,734 tons, 21.0 %
      - Torpedo bulkhead: 639 tons, 2.8 %
      - Armament: 2,009 tons, 8.9 %
      - Armour Deck: 2,317 tons, 10.3 %
      - Conning Tower: 207 tons, 0.9 %
   Machinery: 1,035 tons, 4.6 %
   Hull, fittings & equipment: 7,823 tons, 34.6 %
   Fuel, ammunition & stores: 2,183 tons, 9.7 %
   Miscellaneous weights: 495 tons, 2.2 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     35,897 lbs / 16,282 Kg = 41.5 x 12.0 " / 305 mm shells or 7.1 torpedoes
   Stability (Unstable if below 1.00): 1.18
   Metacentric height 6.0 ft / 1.8 m
   Roll period: 15.8 seconds
   Steadiness   - As gun platform (Average = 50 %): 71 %
         - Recoil effect (Restricted arc if above 1.00): 0.40
   Seaboat quality  (Average = 1.00): 1.36

Hull form characteristics:
   Hull has a flush deck
   Block coefficient: 0.552
   Length to Beam Ratio: 6.00 : 1
   'Natural speed' for length: 23.54 kts
   Power going to wave formation at top speed: 42 %
   Trim (Max stability = 0, Max steadiness = 100): 52
   Bow angle (Positive = bow angles forward): 10.63 degrees
   Stern overhang: -2.00 ft / -0.61 m
   Freeboard (% = measuring location as a percentage of overall length):
      - Stem:      16.00 ft / 4.88 m
      - Forecastle (15 %):   16.00 ft / 4.88 m
      - Mid (50 %):      16.00 ft / 4.88 m
      - Quarterdeck (15 %):   16.00 ft / 4.88 m
      - Stern:      16.00 ft / 4.88 m
      - Average freeboard:   16.00 ft / 4.88 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 74.7 %
      - Above water (accommodation/working, high = better): 118.5 %
   Waterplane Area: 35,778 Square feet or 3,324 Square metres
   Displacement factor (Displacement / loading): 104 %
   Structure weight / hull surface area: 162 lbs/sq ft or 791 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.95
      - Longitudinal: 1.50
      - Overall: 1.00
   Hull space for machinery, storage, compartmentation is excellent
   Room for accommodation and workspaces is adequate
   Ship has slow, easy roll, a good, steady gun platform
   Good seaboat, rides out heavy weather easily

250t F/C
25t W/T
20t Torpedoes
200t Construction Reserve

[Jefgte]

I agree with Rocky & add "in the hexagonal position 2 side turrets are dead weight".

Not a bad BB.
Perhaps
- increase beam ratio to 6.5 - (28 m is to much)
- increase BC
...


Jef