Aztec Ship Designs 1921-1924

[TacCovert4]

Yeah, light and fast don't show good seakeeping in SS as SS determines seakeeping at top speed, not at cruise.....at top speed a large torpedo boat is likely to stuff the bow if a wave comes in....but she's making a full speed run for maybe 10nm tops before coming back off the steam.  After Grand Turk, seeing that a Caribbean Hurricane took out some Roman E-class DDs in what admittedly were probably Sea State 7 or 8 conditions, I sort of went 'a little bit better' for my own seakeeping.....on the hypothesis that a seakeeping just a tad better than the old E-class had (.64) would be enough for almost all conditions the Caribbean could ever throw.

[TacCovert4]

With the rising local tensions, the development of the new 400mm gun, and the desire of the RAN to stop it's current cycle of a new pair of BBs every 3 years, designs for a new BB to be laid down in 1924 are put forward.

First:

Sublimis, Aztec Battleship laid down 1924

Displacement:
   32,172 t light; 34,118 t standard; 37,256 t normal; 39,767 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (642.64 ft / 636.48 ft) x 111.55 ft x (29.53 / 31.19 ft)
   (195.88 m / 194.00 m) x 34.00 m  x (9.00 / 9.51 m)

Armament:
      8 - 15.75" / 400 mm 45.0 cal guns - 1,969.41lbs / 893.31kg shells, 120 per gun
     Breech loading guns in turret on barbette mounts, 1924 Model
     4 x 2-gun mounts on centreline ends, evenly spread
      2 raised mounts - superfiring
      16 - 5.12" / 130 mm 50.0 cal guns - 70.97lbs / 32.19kg shells, 200 per gun
     Quick firing guns in deck and hoist mounts, 1924 Model
     8 x Twin mounts on sides, evenly spread
      8 - 2.76" / 70.0 mm 50.0 cal guns - 11.08lbs / 5.03kg shells, 300 per gun
     Anti-air guns in deck mounts, 1924 Model
     8 x Single mounts on centreline, evenly spread
      8 raised mounts
      20 - 1.18" / 30.0 mm 50.0 cal guns - 0.87lbs / 0.40kg shells, 1,000 per gun
     Anti-air guns in deck and hoist mounts, 1924 Model
     10 x Twin mounts on sides, evenly spread
      Weight of broadside 16,997 lbs / 7,710 kg

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   13.4" / 340 mm   420.11 ft / 128.05 m   14.76 ft / 4.50 m
   Ends:   3.15" / 80 mm   108.27 ft / 33.00 m   9.84 ft / 3.00 m
     108.10 ft / 32.95 m Unarmoured ends
     Main Belt covers 102 % of normal length

   - Torpedo Bulkhead - Additional damage containing bulkheads:
      2.36" / 60 mm   420.11 ft / 128.05 m   28.08 ft / 8.56 m
   Beam between torpedo bulkheads 91.86 ft / 28.00 m

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   15.7" / 400 mm   8.66" / 220 mm      14.2" / 360 mm
   2nd:   3.15" / 80 mm   1.97" / 50 mm      3.15" / 80 mm
   4th:         -            -         0.79" / 20 mm

   - Armoured deck - multiple decks:
   For and Aft decks: 5.51" / 140 mm
   Forecastle: 0.00" / 0 mm  Quarter deck: 3.15" / 80 mm

   - Conning towers: Forward 5.91" / 150 mm, Aft 5.91" / 150 mm

Machinery:
   Oil fired boilers, steam turbines,
   Geared drive, 4 shafts, 66,993 shp / 49,977 Kw = 24.00 kts
   Range 12,000nm at 14.00 kts
   Bunker at max displacement = 5,649 tons

Complement:
   1,340 - 1,743

Cost:
   £9.370 million / $37.481 million

Distribution of weights at normal displacement:
   Armament: 3,434 tons, 9.2 %
      - Guns: 3,434 tons, 9.2 %
   Armour: 13,353 tons, 35.8 %
      - Belts: 3,817 tons, 10.2 %
      - Torpedo bulkhead: 1,031 tons, 2.8 %
      - Armament: 3,485 tons, 9.4 %
      - Armour Deck: 4,736 tons, 12.7 %
      - Conning Towers: 284 tons, 0.8 %
   Machinery: 2,207 tons, 5.9 %
   Hull, fittings & equipment: 12,499 tons, 33.5 %
   Fuel, ammunition & stores: 5,084 tons, 13.6 %
   Miscellaneous weights: 679 tons, 1.8 %
      - Hull below water: 100 tons
      - Hull above water: 272 tons
      - On freeboard deck: 60 tons
      - Above deck: 247 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     56,584 lbs / 25,666 Kg = 29.0 x 15.7 " / 400 mm shells or 11.0 torpedoes
   Stability (Unstable if below 1.00): 1.11
   Metacentric height 7.2 ft / 2.2 m
   Roll period: 17.5 seconds
   Steadiness   - As gun platform (Average = 50 %): 70 %
         - Recoil effect (Restricted arc if above 1.00): 0.54
   Seaboat quality  (Average = 1.00): 1.10

Hull form characteristics:
   Hull has a flush deck,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0.622 / 0.629
   Length to Beam Ratio: 5.71 : 1
   'Natural speed' for length: 25.23 kts
   Power going to wave formation at top speed: 50 %
   Trim (Max stability = 0, Max steadiness = 100): 64
   Bow angle (Positive = bow angles forward): 15.00 degrees
   Stern overhang: 0.00 ft / 0.00 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
      - Forecastle:   20.00 %,  22.97 ft / 7.00 m,  21.33 ft / 6.50 m
      - Forward deck:   30.00 %,  21.33 ft / 6.50 m,  17.39 ft / 5.30 m
      - Aft deck:   35.00 %,  17.39 ft / 5.30 m,  17.39 ft / 5.30 m
      - Quarter deck:   15.00 %,  17.39 ft / 5.30 m,  17.39 ft / 5.30 m
      - Average freeboard:      18.90 ft / 5.76 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 73.2 %
      - Above water (accommodation/working, high = better): 137.9 %
   Waterplane Area: 53,002 Square feet or 4,924 Square metres
   Displacement factor (Displacement / loading): 111 %
   Structure weight / hull surface area: 205 lbs/sq ft or 1,002 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.96
      - Longitudinal: 1.40
      - Overall: 1.00
   Excellent machinery, storage, compartmentation space
   Excellent accommodation and workspace room
   Ship has slow, easy roll, a good, steady gun platform

Quarterdeck:  80mm monolithic on top of End Belt.  End Belt covers QD/Steering area
Main Deck:  110mm main deck, 30mm Splinter Deck

Main Belt:  Upper half uniform 360mm.  Lower half tapers from 360mm to 280mm on bottom edge

344t - 1918 FC
50t - 2 x 1912 NF Devices
25t - LR Radio
60t - 2 x Armed Floatplane Spotter, provision for 2 x Catapult
100t - Additional pumps and DC Equipment
100t - Builder's Reserve


And a Second Variant, which is for practical purposes a continuation of the Monarch Class into 400mm guns.....by replacing the triple 360mm turrets with twin 400s.

Sublimis, Aztec Battleship laid down 1924

Displacement:
   28,959 t light; 30,551 t standard; 33,492 t normal; 35,846 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (629.07 ft / 623.36 ft) x 111.55 ft x (28.10 / 29.72 ft)
   (191.74 m / 190.00 m) x 34.00 m  x (8.56 / 9.06 m)

Armament:
      6 - 15.75" / 400 mm 45.0 cal guns - 1,969.41lbs / 893.31kg shells, 120 per gun
     Breech loading guns in turret on barbette mounts, 1924 Model
     3 x 2-gun mounts on centreline, forward evenly spread
      2 raised mounts
      14 - 5.12" / 130 mm 50.0 cal guns - 70.97lbs / 32.19kg shells, 200 per gun
     Quick firing guns in deck and hoist mounts, 1924 Model
     6 x Twin mounts on sides, aft evenly spread
     1 x Single mount on centreline, aft deck aft
      1 raised mount
      8 - 2.76" / 70.0 mm 50.0 cal guns - 11.08lbs / 5.03kg shells, 300 per gun
     Anti-air guns in deck mounts, 1924 Model
     8 x Single mounts on centreline, aft evenly spread
      8 raised mounts
      20 - 1.18" / 30.0 mm 50.0 cal guns - 0.87lbs / 0.40kg shells, 1,000 per gun
     Anti-air guns in deck and hoist mounts, 1924 Model
     10 x Twin mounts on sides, evenly spread
      Weight of broadside 12,916 lbs / 5,859 kg

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   13.4" / 340 mm   405.18 ft / 123.50 m   14.76 ft / 4.50 m
   Ends:   3.15" / 80 mm   108.27 ft / 33.00 m   9.84 ft / 3.00 m
     109.91 ft / 33.50 m Unarmoured ends
     Main Belt covers 100 % of normal length

   - Torpedo Bulkhead - Additional damage containing bulkheads:
      2.36" / 60 mm   405.18 ft / 123.50 m   26.51 ft / 8.08 m
   Beam between torpedo bulkheads 91.86 ft / 28.00 m

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   15.7" / 400 mm   8.66" / 220 mm      14.2" / 360 mm
   2nd:   3.15" / 80 mm   1.97" / 50 mm      3.15" / 80 mm
   4th:         -            -         0.79" / 20 mm

   - Armoured deck - multiple decks:
   For and Aft decks: 5.51" / 140 mm
   Forecastle: 0.00" / 0 mm  Quarter deck: 3.15" / 80 mm

   - Conning towers: Forward 5.91" / 150 mm, Aft 5.91" / 150 mm

Machinery:
   Oil fired boilers, steam turbines,
   Geared drive, 4 shafts, 62,973 shp / 46,978 Kw = 24.00 kts
   Range 12,000nm at 14.00 kts
   Bunker at max displacement = 5,294 tons

Complement:
   1,237 - 1,609

Cost:
   £7.784 million / $31.137 million

Distribution of weights at normal displacement:
   Armament: 2,625 tons, 7.8 %
      - Guns: 2,625 tons, 7.8 %
   Armour: 12,130 tons, 36.2 %
      - Belts: 3,702 tons, 11.1 %
      - Torpedo bulkhead: 939 tons, 2.8 %
      - Armament: 2,679 tons, 8.0 %
      - Armour Deck: 4,545 tons, 13.6 %
      - Conning Towers: 264 tons, 0.8 %
   Machinery: 2,074 tons, 6.2 %
   Hull, fittings & equipment: 11,532 tons, 34.4 %
   Fuel, ammunition & stores: 4,534 tons, 13.5 %
   Miscellaneous weights: 598 tons, 1.8 %
      - Hull below water: 100 tons
      - Hull above water: 232 tons
      - On freeboard deck: 60 tons
      - Above deck: 206 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     56,815 lbs / 25,771 Kg = 29.1 x 15.7 " / 400 mm shells or 11.9 torpedoes
   Stability (Unstable if below 1.00): 1.15
   Metacentric height 7.7 ft / 2.4 m
   Roll period: 16.9 seconds
   Steadiness   - As gun platform (Average = 50 %): 70 %
         - Recoil effect (Restricted arc if above 1.00): 0.42
   Seaboat quality  (Average = 1.00): 1.10

Hull form characteristics:
   Hull has a flush deck,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0.600 / 0.607
   Length to Beam Ratio: 5.59 : 1
   'Natural speed' for length: 24.97 kts
   Power going to wave formation at top speed: 50 %
   Trim (Max stability = 0, Max steadiness = 100): 64
   Bow angle (Positive = bow angles forward): 15.00 degrees
   Stern overhang: 0.00 ft / 0.00 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
      - Forecastle:   20.00 %,  21.33 ft / 6.50 m,  19.69 ft / 6.00 m
      - Forward deck:   30.00 %,  19.69 ft / 6.00 m,  16.73 ft / 5.10 m
      - Aft deck:   35.00 %,  16.73 ft / 5.10 m,  16.40 ft / 5.00 m
      - Quarter deck:   15.00 %,  16.40 ft / 5.00 m,  16.40 ft / 5.00 m
      - Average freeboard:      17.79 ft / 5.42 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 67.1 %
      - Above water (accommodation/working, high = better): 135.7 %
   Waterplane Area: 50,857 Square feet or 4,725 Square metres
   Displacement factor (Displacement / loading): 118 %
   Structure weight / hull surface area: 197 lbs/sq ft or 962 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.95
      - Longitudinal: 1.47
      - Overall: 1.00
   Excellent machinery, storage, compartmentation space
   Excellent accommodation and workspace room
   Ship has slow, easy roll, a good, steady gun platform

Quarterdeck:  80mm monolithic on top of End Belt.  End Belt covers QD/Steering area
Main Deck:  110mm main deck, 30mm Splinter Deck

Main Belt:  Upper half uniform 360mm.  Lower half tapers from 360mm to 280mm on bottom edge

263t - 1918 FC
50t - 2 x 1912 NF Devices
25t - LR Radio
60t - 2 x Armed Floatplane Spotter, provision for 2 x Catapult
100t - Additional pumps and DC Equipment
100t - Builder's Reserve

[TacCovert4]

And going to different protection schemes, it's possible to reduce weight to the point where the yards claim the ability to pump these ships out cheaply and relatively quickly:

BB-X, Aztec Battleship laid down 1924

Displacement:
   27,293 t light; 28,700 t standard; 31,056 t normal; 32,941 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (653.49 ft / 646.33 ft) x 101.71 ft x (27.56 / 28.93 ft)
   (199.18 m / 197.00 m) x 31.00 m  x (8.40 / 8.82 m)

Armament:
      6 - 15.75" / 400 mm 45.0 cal guns - 1,969.41lbs / 893.31kg shells, 100 per gun
     Breech loading guns in turret on barbette mounts, 1924 Model
     3 x 3-gun mounts on centreline, forward evenly spread
      1 raised mount
      14 - 5.12" / 130 mm 50.0 cal guns - 70.97lbs / 32.19kg shells, 200 per gun
     Breech loading guns in deck and hoist mounts, 1924 Model
     6 x Twin mounts on sides, aft evenly spread
     1 x Twin mount on centreline, aft deck aft
      1 raised mount
      6 - 2.76" / 70.0 mm 50.0 cal guns - 11.08lbs / 5.03kg shells, 300 per gun
     Anti-air guns in deck mounts, 1924 Model
     6 x Single mounts on centreline, aft evenly spread
      6 raised mounts
      16 - 1.18" / 30.0 mm 50.0 cal guns - 0.87lbs / 0.40kg shells, 1,000 per gun
     Anti-air guns in deck and hoist mounts, 1924 Model
     8 x Twin mounts on side ends, evenly spread
      Weight of broadside 12,890 lbs / 5,847 kg

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   12.6" / 320 mm   439.30 ft / 133.90 m   16.40 ft / 5.00 m
   Ends:   2.76" / 70 mm   121.39 ft / 37.00 m   16.40 ft / 5.00 m
     85.63 ft / 26.10 m Unarmoured ends
     Main Belt covers 105 % of normal length

   - Torpedo Bulkhead - Additional damage containing bulkheads:
      1.97" / 50 mm   439.30 ft / 133.90 m   25.98 ft / 7.92 m
   Beam between torpedo bulkheads 78.74 ft / 24.00 m

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   15.7" / 400 mm   7.87" / 200 mm      13.4" / 340 mm
   2nd:   3.15" / 80 mm   1.97" / 50 mm      3.15" / 80 mm
   4th:         -            -         0.98" / 25 mm

   - Protected deck - multiple decks:
   For and Aft decks: 5.51" / 140 mm
   Forecastle: 0.00" / 0 mm  Quarter deck: 2.76" / 70 mm

   - Conning towers: Forward 6.30" / 160 mm, Aft 6.30" / 160 mm

Machinery:
   Oil fired boilers, steam turbines,
   Geared drive, 4 shafts, 58,349 shp / 43,529 Kw = 24.00 kts
   Range 10,000nm at 14.00 kts
   Bunker at max displacement = 4,241 tons

Complement:
   1,169 - 1,520

Cost:
   £7.532 million / $30.129 million

Distribution of weights at normal displacement:
   Armament: 2,610 tons, 8.4 %
      - Guns: 2,610 tons, 8.4 %
   Armour: 11,787 tons, 38.0 %
      - Belts: 4,135 tons, 13.3 %
      - Torpedo bulkhead: 831 tons, 2.7 %
      - Armament: 2,290 tons, 7.4 %
      - Armour Deck: 4,263 tons, 13.7 %
      - Conning Towers: 268 tons, 0.9 %
   Machinery: 1,922 tons, 6.2 %
   Hull, fittings & equipment: 10,578 tons, 34.1 %
   Fuel, ammunition & stores: 3,763 tons, 12.1 %
   Miscellaneous weights: 396 tons, 1.3 %
      - Hull above water: 131 tons
      - On freeboard deck: 85 tons
      - Above deck: 180 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     49,758 lbs / 22,570 Kg = 25.5 x 15.7 " / 400 mm shells or 9.8 torpedoes
   Stability (Unstable if below 1.00): 1.11
   Metacentric height 6.3 ft / 1.9 m
   Roll period: 17.0 seconds
   Steadiness   - As gun platform (Average = 50 %): 70 %
         - Recoil effect (Restricted arc if above 1.00): 0.52
   Seaboat quality  (Average = 1.00): 1.12

Hull form characteristics:
   Hull has a flush deck,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0.600 / 0.606
   Length to Beam Ratio: 6.35 : 1
   'Natural speed' for length: 25.42 kts
   Power going to wave formation at top speed: 48 %
   Trim (Max stability = 0, Max steadiness = 100): 63
   Bow angle (Positive = bow angles forward): 20.00 degrees
   Stern overhang: 0.00 ft / 0.00 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
      - Forecastle:   20.00 %,  19.69 ft / 6.00 m,  18.04 ft / 5.50 m
      - Forward deck:   30.00 %,  18.04 ft / 5.50 m,  16.40 ft / 5.00 m
      - Aft deck:   35.00 %,  16.40 ft / 5.00 m,  14.76 ft / 4.50 m
      - Quarter deck:   15.00 %,  14.76 ft / 4.50 m,  14.76 ft / 4.50 m
      - Average freeboard:      16.58 ft / 5.05 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 73.2 %
      - Above water (accommodation/working, high = better): 128.0 %
   Waterplane Area: 48,078 Square feet or 4,467 Square metres
   Displacement factor (Displacement / loading): 113 %
   Structure weight / hull surface area: 189 lbs/sq ft or 923 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.97
      - Longitudinal: 1.25
      - Overall: 1.00
   Excellent machinery, storage, compartmentation space
   Excellent accommodation and workspace room
   Ship has slow, easy roll, a good, steady gun platform

261t - 1918 FC
25t - LR Wireless
25t - 1918 NF Devices
85t - Provision for 2 armed spotter planes w/Cats and Crane

Belt is 340m above water, bottom 2.5m tapering to 260mm

Main Deck is 110mm with 30mm Splinter

QD and End Belt is monolithic 70mm protecting Aft


And while the 400mm gun is a new design and obviously desired, there are designs with the older 360mm gun, still considered perfectly serviceable as a capital ship weapon:

BB-X, Aztec Battleship laid down 1924

Displacement:
   27,232 t light; 28,700 t standard; 31,056 t normal; 32,941 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (653.49 ft / 646.33 ft) x 101.71 ft x (27.56 / 28.93 ft)
   (199.18 m / 197.00 m) x 31.00 m  x (8.40 / 8.82 m)

Armament:
      9 - 14.17" / 360 mm 45.0 cal guns - 1,435.70lbs / 651.22kg shells, 100 per gun
     Breech loading guns in turret on barbette mounts, 1924 Model
     3 x 3-gun mounts on centreline, forward evenly spread
      1 raised mount
      14 - 5.12" / 130 mm 50.0 cal guns - 70.97lbs / 32.19kg shells, 200 per gun
     Breech loading guns in deck and hoist mounts, 1924 Model
     6 x Twin mounts on sides, aft evenly spread
     1 x Twin mount on centreline, aft deck aft
      1 raised mount
      6 - 2.76" / 70.0 mm 50.0 cal guns - 11.08lbs / 5.03kg shells, 300 per gun
     Anti-air guns in deck mounts, 1924 Model
     6 x Single mounts on centreline, aft evenly spread
      6 raised mounts
      16 - 1.18" / 30.0 mm 50.0 cal guns - 0.87lbs / 0.40kg shells, 1,000 per gun
     Anti-air guns in deck and hoist mounts, 1924 Model
     8 x Twin mounts on side ends, evenly spread
      Weight of broadside 13,995 lbs / 6,348 kg

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   12.6" / 320 mm   439.30 ft / 133.90 m   16.40 ft / 5.00 m
   Ends:   2.76" / 70 mm   121.39 ft / 37.00 m   16.40 ft / 5.00 m
     85.63 ft / 26.10 m Unarmoured ends
     Main Belt covers 105 % of normal length

   - Torpedo Bulkhead - Additional damage containing bulkheads:
      1.97" / 50 mm   439.30 ft / 133.90 m   25.98 ft / 7.92 m
   Beam between torpedo bulkheads 78.74 ft / 24.00 m

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   12.6" / 320 mm   5.51" / 140 mm      11.8" / 300 mm
   2nd:   3.15" / 80 mm   1.97" / 50 mm      3.15" / 80 mm
   4th:         -            -         0.98" / 25 mm

   - Protected deck - multiple decks:
   For and Aft decks: 5.51" / 140 mm
   Forecastle: 0.00" / 0 mm  Quarter deck: 2.76" / 70 mm

   - Conning towers: Forward 5.51" / 140 mm, Aft 5.51" / 140 mm

Machinery:
   Oil fired boilers, steam turbines,
   Geared drive, 4 shafts, 58,349 shp / 43,529 Kw = 24.00 kts
   Range 10,000nm at 14.00 kts
   Bunker at max displacement = 4,241 tons

Complement:
   1,169 - 1,520

Cost:
   £7.846 million / $31.383 million

Distribution of weights at normal displacement:
   Armament: 2,934 tons, 9.4 %
      - Guns: 2,934 tons, 9.4 %
   Armour: 11,456 tons, 36.9 %
      - Belts: 4,135 tons, 13.3 %
      - Torpedo bulkhead: 831 tons, 2.7 %
      - Armament: 1,992 tons, 6.4 %
      - Armour Deck: 4,263 tons, 13.7 %
      - Conning Towers: 235 tons, 0.8 %
   Machinery: 1,922 tons, 6.2 %
   Hull, fittings & equipment: 10,491 tons, 33.8 %
   Fuel, ammunition & stores: 3,824 tons, 12.3 %
   Miscellaneous weights: 429 tons, 1.4 %
      - Hull above water: 148 tons
      - On freeboard deck: 85 tons
      - Above deck: 196 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     48,547 lbs / 22,021 Kg = 34.1 x 14.2 " / 360 mm shells or 9.2 torpedoes
   Stability (Unstable if below 1.00): 1.17
   Metacentric height 6.9 ft / 2.1 m
   Roll period: 16.3 seconds
   Steadiness   - As gun platform (Average = 50 %): 70 %
         - Recoil effect (Restricted arc if above 1.00): 0.50
   Seaboat quality  (Average = 1.00): 1.13

Hull form characteristics:
   Hull has a flush deck,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0.600 / 0.606
   Length to Beam Ratio: 6.35 : 1
   'Natural speed' for length: 25.42 kts
   Power going to wave formation at top speed: 48 %
   Trim (Max stability = 0, Max steadiness = 100): 62
   Bow angle (Positive = bow angles forward): 20.00 degrees
   Stern overhang: 0.00 ft / 0.00 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
      - Forecastle:   20.00 %,  19.69 ft / 6.00 m,  18.04 ft / 5.50 m
      - Forward deck:   30.00 %,  18.04 ft / 5.50 m,  16.40 ft / 5.00 m
      - Aft deck:   35.00 %,  16.40 ft / 5.00 m,  14.76 ft / 4.50 m
      - Quarter deck:   15.00 %,  14.76 ft / 4.50 m,  14.76 ft / 4.50 m
      - Average freeboard:      16.58 ft / 5.05 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 77.0 %
      - Above water (accommodation/working, high = better): 128.0 %
   Waterplane Area: 48,078 Square feet or 4,467 Square metres
   Displacement factor (Displacement / loading): 110 %
   Structure weight / hull surface area: 191 lbs/sq ft or 931 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 1.00
      - Longitudinal: 1.28
      - Overall: 1.02
   Excellent machinery, storage, compartmentation space
   Excellent accommodation and workspace room
   Ship has slow, easy roll, a good, steady gun platform

294t - 1918 FC
25t - LR Wireless
25t - 1918 NF Devices
85t - Provision for 2 armed spotter planes w/Cats and Crane

Belt is 340m above water, bottom 2.5m tapering to 260mm

Main Deck is 110mm with 30mm Splinter

QD and End Belt is monolithic 70mm protecting Aft

[The Rock Doctor]

There's certainly some value in the smaller designs that you can afford to risk and have the numbers you think you need.

[TacCovert4]

There's certainly some value in the smaller designs that you can afford to risk and have the numbers you think you need.

Realistically, I can't keep building BBs in 6 HY without losing 'some' capability.  So going up to a 7HY BB is going to happen.  No way around it.  The question I have to answer is then thus:

Do I build a BB that can reasonably go toe to toe with the ships that Rome, and to a lesser degree Norse, Wilno, Parthia, and Byzance are putting out? 

Or

Do I focus on being the premier New World power, work with Europe diplomatically, and build ships in greater quantity and at lesser cost....but that can still pimp-hand anything the Mayans are coming out with?

The 8 x 400mm design, basically a 24kt Colorado, is something I'm reasonably confident could stand and trade broadsides with the newest European designs.  And still technically be doing it on a budget, as its Roman counterpart the LBS-21 series designs is 43% larger, but has 35mm less deck and 20mm less belt armor for roughly the same firepower.....the size difference primarily being to give the LBS-21 6 more knots of speed, which is useful for accepting or denying battle....but may or may not be tactically useful once both ships are flinging broadsides as the Sublimis 8x400 design can likely fend off a critical hit longer as its engineering spaces are significantly smaller than the raft body, and it's reasonably tougher.

The 6x400 designs, all of them, are basically moves to 'discount' or 'offset' the 4600t per HY cost of the 8x400 design.  The smaller of which also drop the armor down to what's actually the 'standard' 340mm belt, though the decks are still notably thicker than contemporary designs.  These can be built for 3900t per HY, roughly.  While 6 guns was definitely substandard in the teens....with rapidly improving FC, 6 guns is viable if the minimal reasonable gun count for a battleship now.  I can be reasonably assured that the 6 gun designs will be sufficient to form a line of battle that can beat the crap out of the People's Republican Navy for the forseeable future.

And then there's the 360mm designs.  Basically the same armament as the Monarchs, flight I and II, with some modest upgrades.  360mm is still a very viable caliber in 1924.

In the end, is it worth the extra 1900t per HY, roughly a DD-Leader per HY, to build a world-class Battleship, or should I focus on a steady production of an adequate battleship?

[The Rock Doctor]

I'm inclined to say that the 8x400 is a good investment, for the reasons you noted. 

The 9x360 is still viable against the Mayans but might not suffice against European ships.  6x400 is still going to hurt anything that gets in range, even if it has fewer guns than the opposition.

[TacCovert4]

I'm inclined to say that the 8x400 is a good investment, for the reasons you noted. 

The 9x360 is still viable against the Mayans but might not suffice against European ships.  6x400 is still going to hurt anything that gets in range, even if it has fewer guns than the opposition.

One option is to do this one as a one off.   Go slightly bigger, put in good flag accommodations,  and build her as the fleet flagship,  with follow on ships being of the 3 turret variety to get numbers.

[Jefgte]

These are interesting projects.

There is no harm in designing the replacement of ships lost during the war against the Mayas
.

[TacCovert4]

These are interesting projects.

There is no harm in designing the replacement of ships lost during the war against the Mayas
.

Actually,  the design would be finalized before the war.  These aren't emergency programs,  rather what would be in the pipeline

[TacCovert4]

After the engagement off Veracruz....suddenly this design comes back into play as a possibility over its more generalist and unarmored counterpart.  Even light armor would have likely helped keep some of the ships intact.

I-Class, Aztec Destroyer laid down 1924

Displacement:
   2,000 t light; 2,097 t standard; 2,348 t normal; 2,550 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (400.87 ft / 393.70 ft) x 36.09 ft x (10.52 / 11.23 ft)
   (122.18 m / 120.00 m) x 11.00 m  x (3.21 / 3.42 m)

Armament:
      6 - 5.12" / 130 mm 50.0 cal guns - 70.97lbs / 32.19kg shells, 200 per gun
     Quick firing guns in deck and hoist mounts, 1924 Model
     3 x Twin mounts on centreline ends, majority forward
      1 raised mount - superfiring
      6 - 1.18" / 30.0 mm 50.0 cal guns - 0.87lbs / 0.39kg shells, 1,000 per gun
     Quick firing guns in deck and hoist mounts, 1924 Model
     2 x Twin mounts on sides, forward deck aft
     1 x Twin mount on centreline, aft deck centre
      1 raised mount
      Weight of broadside 431 lbs / 196 kg

Armour:
   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   1.06" / 27 mm   1.06" / 27 mm      1.06" / 27 mm
   2nd:         -            -         0.79" / 20 mm

   - Box over magazines:
   1.06" / 27 mm

   - Conning towers: Forward 1.06" / 27 mm, Aft 0.00" / 0 mm

Machinery:
   Oil fired boilers, steam turbines,
   Geared drive, 2 shafts, 43,642 shp / 32,557 Kw = 32.25 kts
   Range 5,000nm at 14.00 kts
   Bunker at max displacement = 453 tons

Complement:
   168 - 219

Cost:
   £0.871 million / $3.483 million

Distribution of weights at normal displacement:
   Armament: 104 tons, 4.4 %
      - Guns: 104 tons, 4.4 %
   Armour: 45 tons, 1.9 %
      - Armament: 24 tons, 1.0 %
      - Armour Deck: 17 tons, 0.7 %
      - Conning Tower: 4 tons, 0.2 %
   Machinery: 1,184 tons, 50.4 %
   Hull, fittings & equipment: 639 tons, 27.2 %
   Fuel, ammunition & stores: 349 tons, 14.8 %
   Miscellaneous weights: 27 tons, 1.1 %
      - Hull above water: 6 tons
      - On freeboard deck: 16 tons
      - Above deck: 5 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     599 lbs / 272 Kg = 8.9 x 5.1 " / 130 mm shells or 0.3 torpedoes
   Stability (Unstable if below 1.00): 1.12
   Metacentric height 1.3 ft / 0.4 m
   Roll period: 13.1 seconds
   Steadiness   - As gun platform (Average = 50 %): 70 %
         - Recoil effect (Restricted arc if above 1.00): 0.80
   Seaboat quality  (Average = 1.00): 1.02

Hull form characteristics:
   Hull has a flush deck,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0.550 / 0.559
   Length to Beam Ratio: 10.91 : 1
   'Natural speed' for length: 19.84 kts
   Power going to wave formation at top speed: 66 %
   Trim (Max stability = 0, Max steadiness = 100): 69
   Bow angle (Positive = bow angles forward): 20.00 degrees
   Stern overhang: 0.00 ft / 0.00 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
      - Forecastle:   20.00 %,  19.69 ft / 6.00 m,  18.04 ft / 5.50 m
      - Forward deck:   30.00 %,  18.04 ft / 5.50 m,  14.76 ft / 4.50 m
      - Aft deck:   35.00 %,  14.76 ft / 4.50 m,  14.76 ft / 4.50 m
      - Quarter deck:   15.00 %,  14.76 ft / 4.50 m,  14.76 ft / 4.50 m
      - Average freeboard:      16.04 ft / 4.89 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 181.5 %
      - Above water (accommodation/working, high = better): 174.5 %
   Waterplane Area: 9,916 Square feet or 921 Square metres
   Displacement factor (Displacement / loading): 69 %
   Structure weight / hull surface area: 37 lbs/sq ft or 181 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.50
      - Longitudinal: 1.42
      - Overall: 0.55
   Cramped machinery, storage, compartmentation space
   Excellent accommodation and workspace room
   Ship has slow, easy roll, a good, steady gun platform


11t - 1918 FC
16t - 1x4x21in HW TT Centerline

[TacCovert4]

A slight change to the plans for the I class DD......lessons from the action off Veracruz include not excessive torpedo armament, improved protection for the vitals of the ship, improving reserve floatation (which isn't going to be great under any conditions for a DD) etc. 

I-Class, Aztec Destroyer laid down 1924

Displacement:
   2,000 t light; 2,097 t standard; 2,348 t normal; 2,550 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (400.87 ft / 393.70 ft) x 36.09 ft x (10.52 / 11.23 ft)
   (122.18 m / 120.00 m) x 11.00 m  x (3.21 / 3.42 m)

Armament:
      6 - 5.12" / 130 mm 50.0 cal guns - 70.97lbs / 32.19kg shells, 200 per gun
     Quick firing guns in deck and hoist mounts, 1924 Model
     3 x Twin mounts on centreline ends, majority forward
      1 raised mount - superfiring
      6 - 1.18" / 30.0 mm 50.0 cal guns - 0.86lbs / 0.39kg shells, 1,000 per gun
     Quick firing guns in deck and hoist mounts, 1924 Model
     2 x Twin mounts on sides, forward deck aft
     1 x Twin mount on centreline, aft deck centre
      1 raised mount
      Weight of broadside 431 lbs / 195 kg

Armour:
   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   0.94" / 24 mm   0.87" / 22 mm      0.87" / 22 mm
   2nd:         -            -         0.79" / 20 mm

   - Box over magazines:
   0.94" / 24 mm

   - Conning towers: Forward 0.94" / 24 mm, Aft 0.00" / 0 mm

Machinery:
   Oil fired boilers, steam turbines,
   Geared drive, 2 shafts, 43,642 shp / 32,557 Kw = 32.25 kts
   Range 5,000nm at 14.00 kts
   Bunker at max displacement = 453 tons

Complement:
   168 - 219

Cost:
   £0.871 million / $3.485 million

Distribution of weights at normal displacement:
   Armament: 104 tons, 4.4 %
      - Guns: 104 tons, 4.4 %
   Armour: 38 tons, 1.6 %
      - Armament: 19 tons, 0.8 %
      - Armour Deck: 15 tons, 0.7 %
      - Conning Tower: 4 tons, 0.2 %
   Machinery: 1,186 tons, 50.5 %
   Hull, fittings & equipment: 645 tons, 27.4 %
   Fuel, ammunition & stores: 349 tons, 14.8 %
   Miscellaneous weights: 27 tons, 1.1 %
      - Hull above water: 6 tons
      - On freeboard deck: 16 tons
      - Above deck: 5 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     604 lbs / 274 Kg = 9.0 x 5.1 " / 130 mm shells or 0.3 torpedoes
   Stability (Unstable if below 1.00): 1.12
   Metacentric height 1.3 ft / 0.4 m
   Roll period: 13.1 seconds
   Steadiness   - As gun platform (Average = 50 %): 70 %
         - Recoil effect (Restricted arc if above 1.00): 0.80
   Seaboat quality  (Average = 1.00): 1.02

Hull form characteristics:
   Hull has a flush deck,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0.550 / 0.559
   Length to Beam Ratio: 10.91 : 1
   'Natural speed' for length: 19.84 kts
   Power going to wave formation at top speed: 66 %
   Trim (Max stability = 0, Max steadiness = 100): 69
   Bow angle (Positive = bow angles forward): 20.00 degrees
   Stern overhang: 0.00 ft / 0.00 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
      - Forecastle:   20.00 %,  19.69 ft / 6.00 m,  18.04 ft / 5.50 m
      - Forward deck:   30.00 %,  18.04 ft / 5.50 m,  14.76 ft / 4.50 m
      - Aft deck:   35.00 %,  14.76 ft / 4.50 m,  14.76 ft / 4.50 m
      - Quarter deck:   15.00 %,  14.76 ft / 4.50 m,  14.76 ft / 4.50 m
      - Average freeboard:      16.04 ft / 4.89 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 181.6 %
      - Above water (accommodation/working, high = better): 174.5 %
   Waterplane Area: 9,916 Square feet or 921 Square metres
   Displacement factor (Displacement / loading): 70 %
   Structure weight / hull surface area: 37 lbs/sq ft or 182 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.50
      - Longitudinal: 1.44
      - Overall: 0.56
   Cramped machinery, storage, compartmentation space
   Excellent accommodation and workspace room
   Ship has slow, easy roll, a good, steady gun platform

11t - 1918 FC
16t - 1x4x21in HW TT Centerline

[TacCovert4]

With more lessons from Veracruz....but also a need to likely produce replacement cruisers for the lost Eagles in rapid time, a variation on the 6000t cruiser design.  Loses two secondary guns compared to the Splendid Cats in exchange for an additional main battery gun, though this is helped by the aft secondary being superfiring over the aft main mount, allowing for a 4 gun secondary broadside equal to the Splendid Cats.  Armor is specifically designed to maximize survivability, 1kt of top speed is lost when compared to the Splendid Cats in order to gain the additional protection.  Torpedo Armament is also slightly reduced in favor of the improved gun firepower.

Town-Class, Aztec Corvette laid down 1924

Displacement:
   6,000 t light; 6,292 t standard; 7,058 t normal; 7,672 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (488.66 ft / 482.28 ft) x 59.06 ft x (16.06 / 17.15 ft)
   (148.94 m / 147.00 m) x 18.00 m  x (4.90 / 5.23 m)

Armament:
      6 - 7.09" / 180 mm 50.0 cal guns - 188.38lbs / 85.45kg shells, 200 per gun
     Quick firing guns in deck and hoist mounts, 1924 Model
     3 x Twin mounts on centreline ends, majority forward
      1 raised mount - superfiring
      6 - 3.94" / 100 mm 50.0 cal guns - 32.30lbs / 14.65kg shells, 200 per gun
     Quick firing guns in deck mounts, 1924 Model
     2 x Twin mounts on sides, forward deck aft
     1 x Twin mount on centreline, aft deck centre
      1 raised mount
      8 - 1.18" / 30.0 mm 50.0 cal guns - 0.87lbs / 0.40kg shells, 1,000 per gun
     Anti-air guns in deck and hoist mounts, 1924 Model
     4 x Twin mounts on sides, evenly spread
      Weight of broadside 1,331 lbs / 604 kg

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   3.94" / 100 mm   313.48 ft / 95.55 m   11.48 ft / 3.50 m
   Ends:   1.57" / 40 mm   168.77 ft / 51.44 m   11.48 ft / 3.50 m
     Main Belt covers 100 % of normal length

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   3.94" / 100 mm   1.97" / 50 mm      3.15" / 80 mm
   2nd:   1.06" / 27 mm         -               -
   3rd:         -            -         0.79" / 20 mm

   - Protected deck - single deck:
   For and Aft decks: 1.97" / 50 mm
   Forecastle: 1.06" / 27 mm  Quarter deck: 1.38" / 35 mm

   - Conning towers: Forward 3.94" / 100 mm, Aft 0.00" / 0 mm

Machinery:
   Oil fired boilers, steam turbines,
   Geared drive, 2 shafts, 52,584 shp / 39,227 Kw = 29.00 kts
   Range 8,000nm at 14.00 kts
   Bunker at max displacement = 1,379 tons

Complement:
   384 - 500

Cost:
   £1.800 million / $7.198 million

Distribution of weights at normal displacement:
   Armament: 300 tons, 4.2 %
      - Guns: 300 tons, 4.2 %
   Armour: 1,485 tons, 21.0 %
      - Belts: 709 tons, 10.0 %
      - Armament: 73 tons, 1.0 %
      - Armour Deck: 672 tons, 9.5 %
      - Conning Tower: 31 tons, 0.4 %
   Machinery: 1,732 tons, 24.5 %
   Hull, fittings & equipment: 2,367 tons, 33.5 %
   Fuel, ammunition & stores: 1,059 tons, 15.0 %
   Miscellaneous weights: 116 tons, 1.6 %
      - Hull above water: 45 tons
      - On freeboard deck: 31 tons
      - Above deck: 40 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     8,520 lbs / 3,864 Kg = 47.9 x 7.1 " / 180 mm shells or 1.4 torpedoes
   Stability (Unstable if below 1.00): 1.17
   Metacentric height 3.0 ft / 0.9 m
   Roll period: 14.3 seconds
   Steadiness   - As gun platform (Average = 50 %): 70 %
         - Recoil effect (Restricted arc if above 1.00): 0.41
   Seaboat quality  (Average = 1.00): 1.01

Hull form characteristics:
   Hull has a flush deck,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0.540 / 0.550
   Length to Beam Ratio: 8.17 : 1
   'Natural speed' for length: 21.96 kts
   Power going to wave formation at top speed: 59 %
   Trim (Max stability = 0, Max steadiness = 100): 69
   Bow angle (Positive = bow angles forward): 15.00 degrees
   Stern overhang: 0.00 ft / 0.00 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
      - Forecastle:   20.00 %,  23.79 ft / 7.25 m,  20.51 ft / 6.25 m
      - Forward deck:   30.00 %,  20.51 ft / 6.25 m,  18.04 ft / 5.50 m
      - Aft deck:   35.00 %,  18.04 ft / 5.50 m,  16.40 ft / 5.00 m
      - Quarter deck:   15.00 %,  16.40 ft / 5.00 m,  16.40 ft / 5.00 m
      - Average freeboard:      18.64 ft / 5.68 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 98.3 %
      - Above water (accommodation/working, high = better): 177.5 %
   Waterplane Area: 19,692 Square feet or 1,829 Square metres
   Displacement factor (Displacement / loading): 112 %
   Structure weight / hull surface area: 85 lbs/sq ft or 415 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.85
      - Longitudinal: 1.40
      - Overall: 0.90
   Adequate machinery, storage, compartmentation space
   Excellent accommodation and workspace room
   Ship has slow, easy roll, a good, steady gun platform


25t - LR Radio
30t - 1918 FC
16t - 2 x 2 x 21in HW TT on sides aft
45t - Electric T&E for Main Battery

[TacCovert4]

And the originally planned (and over 12,000t) Lake Class gets a rapid modification.  Trading the four 3-gun turrets for twin mount and hoist, and losing a bunch of weight to bring her down to 9000t, the class gets changed for maximum efficiency in production in order to get ships out into the water as soon as possible without delay.

Lake-class, Aztec Frigate laid down 1924

Displacement:
   9,000 t light; 9,431 t standard; 10,665 t normal; 11,652 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (631.72 ft / 623.36 ft) x 59.06 ft x (18.11 / 19.44 ft)
   (192.55 m / 190.00 m) x 18.00 m  x (5.52 / 5.93 m)

Armament:
      8 - 7.09" / 180 mm 50.0 cal guns - 188.38lbs / 85.45kg shells, 200 per gun
     Quick firing guns in deck and hoist mounts, 1924 Model
     4 x Twin mounts on centreline ends, evenly spread
      2 raised mounts - superfiring
      12 - 3.94" / 100 mm 50.0 cal guns - 32.30lbs / 14.65kg shells, 200 per gun
     Quick firing guns in deck mounts, 1924 Model
     6 x Twin mounts on sides, evenly spread
      2 - 2.76" / 70.0 mm 50.0 cal guns - 11.08lbs / 5.03kg shells, 300 per gun
     Anti-air guns in deck mounts, 1924 Model
     4 x Single mounts on centreline, evenly spread
      2 raised mounts
      8 - 1.18" / 30.0 mm 50.0 cal guns - 0.87lbs / 0.39kg shells, 1,000 per gun
     Anti-air guns in deck and hoist mounts, 1924 Model
     4 x Single mounts on sides, evenly spread
      Weight of broadside 1,924 lbs / 873 kg

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   4.72" / 120 mm   423.88 ft / 129.20 m   11.48 ft / 3.50 m
   Ends:   1.97" / 50 mm   199.44 ft / 60.79 m   9.22 ft / 2.81 m
     Main Belt covers 105 % of normal length

   - Torpedo Bulkhead - Additional damage containing bulkheads:
      1.18" / 30 mm   423.88 ft / 129.20 m   16.73 ft / 5.10 m
   Beam between torpedo bulkheads 49.21 ft / 15.00 m

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   4.92" / 125 mm   3.15" / 80 mm      4.92" / 125 mm
   2nd:   2.36" / 60 mm   1.38" / 35 mm            -
   4th:         -            -         0.79" / 20 mm

   - Armoured deck - single deck:
   For and Aft decks: 2.36" / 60 mm
   Forecastle: 1.06" / 27 mm  Quarter deck: 1.57" / 40 mm

   - Conning towers: Forward 3.54" / 90 mm, Aft 0.00" / 0 mm

Machinery:
   Oil fired boilers, steam turbines,
   Geared drive, 4 shafts, 67,996 shp / 50,725 Kw = 30.00 kts
   Range 10,000nm at 14.00 kts
   Bunker at max displacement = 2,221 tons

Complement:
   524 - 682

Cost:
   £2.502 million / $10.006 million

Distribution of weights at normal displacement:
   Armament: 426 tons, 4.0 %
      - Guns: 426 tons, 4.0 %
   Armour: 2,665 tons, 25.0 %
      - Belts: 1,069 tons, 10.0 %
      - Torpedo bulkhead: 310 tons, 2.9 %
      - Armament: 187 tons, 1.8 %
      - Armour Deck: 1,061 tons, 10.0 %
      - Conning Tower: 37 tons, 0.3 %
   Machinery: 2,240 tons, 21.0 %
   Hull, fittings & equipment: 3,493 tons, 32.8 %
   Fuel, ammunition & stores: 1,665 tons, 15.6 %
   Miscellaneous weights: 176 tons, 1.7 %
      - Hull above water: 61 tons
      - On freeboard deck: 44 tons
      - Above deck: 71 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     13,107 lbs / 5,945 Kg = 73.7 x 7.1 " / 180 mm shells or 2.2 torpedoes
   Stability (Unstable if below 1.00): 1.14
   Metacentric height 2.9 ft / 0.9 m
   Roll period: 14.6 seconds
   Steadiness   - As gun platform (Average = 50 %): 70 %
         - Recoil effect (Restricted arc if above 1.00): 0.50
   Seaboat quality  (Average = 1.00): 1.14

Hull form characteristics:
   Hull has a flush deck,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0.560 / 0.570
   Length to Beam Ratio: 10.56 : 1
   'Natural speed' for length: 24.97 kts
   Power going to wave formation at top speed: 52 %
   Trim (Max stability = 0, Max steadiness = 100): 61
   Bow angle (Positive = bow angles forward): 20.00 degrees
   Stern overhang: 0.00 ft / 0.00 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
      - Forecastle:   18.00 %,  22.97 ft / 7.00 m,  20.51 ft / 6.25 m
      - Forward deck:   30.00 %,  20.51 ft / 6.25 m,  16.40 ft / 5.00 m
      - Aft deck:   38.00 %,  16.40 ft / 5.00 m,  16.40 ft / 5.00 m
      - Quarter deck:   14.00 %,  16.40 ft / 5.00 m,  16.40 ft / 5.00 m
      - Average freeboard:      17.93 ft / 5.47 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 102.8 %
      - Above water (accommodation/working, high = better): 163.2 %
   Waterplane Area: 25,933 Square feet or 2,409 Square metres
   Displacement factor (Displacement / loading): 118 %
   Structure weight / hull surface area: 94 lbs/sq ft or 460 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.95
      - Longitudinal: 0.88
      - Overall: 0.90
   Caution: Hull subject to strain in open-sea
   Adequate machinery, storage, compartmentation space
   Excellent accommodation and workspace room
   Ship has slow, easy roll, a good, steady gun platform

24t - 2 x 3 x 21in HW TT on sides aft

25t - LR Wireless
25t - NF Devices
42t - 1918 FC

60t - Electric T&E For Main Battery

[Kaiser Kirk]

The armor on the DDs is interesting, as I recall, that *may*  have saved a couple of magazines and a conning tower/FC hit. 
Some of the DD losses were when they steamed forward 'one more turn' before veering away, as the Mayans pivoted and the range collapsed,
so the nearest Mayan BBs could now reasonably engage with the casement 6".  Flotation is the only salvation there.

I think the jury's still out on six-gun ships at this time period, the opportunity cost for 8 is usually little. Though I've put forward a number of Six-gun designs
as I've mulled things about - generally Light Armored cruisers like the Scythian I have posted.

The Lake class reminds me of some of the ships I was considering when designing the Royal Niessan series, looks somewhat like the XI version.
But as you pointed out, you have a TDS, while my cruisers don't....oh and it looks like I made one last casement hurrah !

[TacCovert4]

The lake class is definitely the superior gunnery ship

My issue is the 150mm doesn't really have the range or punch and it's old.  My 130mm is new but worse in every way there.  Good DD killer and not more.   The 180 is the serious gun.   But on 6000t 5 or 6 of these is all I'm getting without sacrificing armor.

Though I might test a variant of the 6000 tonner with less armor and more gun.