Aztec Ship Designs 1921-1924

[Jefgte]

... I have all my Navalism files kept on USB keys. I make backups regularly.


No problem Rocky to find the battleship Atahualpa from Peru   ;)   or the SS from my various Panzerschiff studies.

[TacCovert4]

Adjusting the freeboard upward a bit might give you a bit of extra hull strength on the razee to play with.

On the other hand, Bomb's cross-sectional strength is a tad too low.

I hear you on files.  I lost most of the pre-game stuff with my last computer.  At some point, I think I might attach my current .sship files to the encyclopedia entries so they never get lost.

Yeah, with Bomb, it met CS requirements.  Then it didn't....then it did....ad nauseum.  That's just a matter of adjusting the 'reserve' weight that's been dedicated to DC equipment.  Won't be an issue.

I'll try that on the Razee.  Ultimately I'd like to get it down to around 15-16,000t, but I also don't want a ship with inadequate protection. 

[TacCovert4]

More redesigns (ok, new computer, so whole new designs) for the 1922 BB project.  With so much focus of the other powers on larger 'fast battleships' that combine the qualities of Battleship and Battlecruiser, a number of design changes have been accepted, namely that the previous intent of keeping battleships under the 27,000t threshold is no longer possible.

Conqueror, Aztec Battleship laid down 1922

Displacement:
   37,807 t light; 39,764 t standard; 42,723 t normal; 45,090 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (743.28 ft / 738.19 ft) x 118.11 ft x (29.07 / 30.38 ft)
   (226.55 m / 225.00 m) x 36.00 m  x (8.86 / 9.26 m)

Armament:
      12 - 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, 1922 Model
     4 x 3-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, 1922 Model
     8 x Twin mounts on sides, evenly spread
      6 - 2.76" / 70.0 mm 50.0 cal guns - 11.08lbs / 5.03kg shells, 300 per gun
     Anti-air guns in deck mounts, 1922 Model
     6 x Single mounts on sides, 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, 1922 Model
     8 x Twin mounts on side ends, evenly spread
      4 raised mounts - superfiring
      Weight of broadside 18,444 lbs / 8,366 kg

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   13.4" / 340 mm   479.82 ft / 146.25 m   16.40 ft / 5.00 m
   Ends:   2.76" / 70 mm   258.33 ft / 78.74 m   11.48 ft / 3.50 m
     Main Belt covers 100 % of normal length

   - Torpedo Bulkhead - Additional damage containing bulkheads:
      1.57" / 40 mm   479.82 ft / 146.25 m   27.23 ft / 8.30 m
   Beam between torpedo bulkheads 95.14 ft / 29.00 m

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   13.8" / 350 mm   5.91" / 150 mm      13.0" / 330 mm
   2nd:   2.76" / 70 mm   1.38" / 35 mm      2.76" / 70 mm
   4th:         -            -         0.98" / 25 mm

   - Armoured deck - multiple decks:
   For and Aft decks: 5.12" / 130 mm
   Forecastle: 1.18" / 30 mm  Quarter deck: 1.57" / 40 mm

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

Machinery:
   Oil fired boilers, steam turbines,
   Geared drive, 4 shafts, 107,873 shp / 80,473 Kw = 27.00 kts
   Range 10,000nm at 14.00 kts
   Bunker at max displacement = 5,326 tons

Complement:
   1,485 - 1,931

Cost:
   £9.732 million / $38.927 million

Distribution of weights at normal displacement:
   Armament: 3,860 tons, 9.0 %
      - Guns: 3,860 tons, 9.0 %
   Armour: 14,495 tons, 33.9 %
      - Belts: 4,919 tons, 11.5 %
      - Torpedo bulkhead: 761 tons, 1.8 %
      - Armament: 3,313 tons, 7.8 %
      - Armour Deck: 5,211 tons, 12.2 %
      - Conning Towers: 290 tons, 0.7 %
   Machinery: 3,659 tons, 8.6 %
   Hull, fittings & equipment: 15,176 tons, 35.5 %
   Fuel, ammunition & stores: 4,916 tons, 11.5 %
   Miscellaneous weights: 617 tons, 1.4 %
      - Hull above water: 246 tons
      - On freeboard deck: 100 tons
      - Above deck: 271 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     62,990 lbs / 28,572 Kg = 44.2 x 14.2 " / 360 mm shells or 10.7 torpedoes
   Stability (Unstable if below 1.00): 1.13
   Metacentric height 8.1 ft / 2.5 m
   Roll period: 17.4 seconds
   Steadiness   - As gun platform (Average = 50 %): 70 %
         - Recoil effect (Restricted arc if above 1.00): 0.48
   Seaboat quality  (Average = 1.00): 1.05

Hull form characteristics:
   Hull has a flush deck,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0.590 / 0.596
   Length to Beam Ratio: 6.25 : 1
   'Natural speed' for length: 27.17 kts
   Power going to wave formation at top speed: 50 %
   Trim (Max stability = 0, Max steadiness = 100): 67
   Bow angle (Positive = bow angles forward): 10.00 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 %,  28.87 ft / 8.80 m,  23.62 ft / 7.20 m
      - Forward deck:   30.00 %,  23.62 ft / 7.20 m,  18.37 ft / 5.60 m
      - Aft deck:   35.00 %,  18.37 ft / 5.60 m,  18.37 ft / 5.60 m
      - Quarter deck:   15.00 %,  18.37 ft / 5.60 m,  18.37 ft / 5.60 m
      - Average freeboard:      20.63 ft / 6.29 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 81.6 %
      - Above water (accommodation/working, high = better): 158.7 %
   Waterplane Area: 63,174 Square feet or 5,869 Square metres
   Displacement factor (Displacement / loading): 110 %
   Structure weight / hull surface area: 209 lbs/sq ft or 1,022 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.98
      - Longitudinal: 1.17
      - Overall: 1.00
   Excellent machinery, storage, compartmentation space
   Excellent accommodation and workspace room
   Ship has slow, easy roll, a good, steady gun platform

100t - Provision for 2x Spotter plane and Catapult
392t - 1918 FC
50t - NF Devices x 2
25t - LR Wireless
100t - Flag Facilities

[TacCovert4]

The second design for consideration.  Cutting the main guns down from 12 to 9, leaving the speed the same, and marginally improving the armor on a smaller hull.

Conqueror, Aztec Battleship laid down 1922

Displacement:
   32,488 t light; 34,086 t standard; 36,767 t normal; 38,911 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (694.07 ft / 688.98 ft) x 111.55 ft x (28.38 / 29.73 ft)
   (211.55 m / 210.00 m) x 34.00 m  x (8.65 / 9.06 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, 1922 Model
     3 x 3-gun mounts on centreline ends, majority forward
      1 raised mount - 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, 1922 Model
     8 x Twin mounts on sides, evenly spread
      6 - 2.76" / 70.0 mm 50.0 cal guns - 11.08lbs / 5.03kg shells, 300 per gun
     Anti-air guns in deck mounts, 1922 Model
     6 x Single mounts on sides, 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, 1922 Model
     8 x Twin mounts on side ends, evenly spread
      4 raised mounts - superfiring
      Weight of broadside 14,137 lbs / 6,413 kg

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:   2.76" / 70 mm   241.11 ft / 73.49 m   11.48 ft / 3.50 m
     Main Belt covers 100 % of normal length

   - Torpedo Bulkhead - Additional damage containing bulkheads:
      1.97" / 50 mm   447.83 ft / 136.50 m   26.64 ft / 8.12 m
   Beam between torpedo bulkheads 95.14 ft / 29.00 m

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   13.8" / 350 mm   5.91" / 150 mm      13.8" / 350 mm
   2nd:   2.76" / 70 mm   1.38" / 35 mm      2.76" / 70 mm
   4th:         -            -         0.98" / 25 mm

   - Armoured deck - multiple decks:
   For and Aft decks: 5.12" / 130 mm
   Forecastle: 1.18" / 30 mm  Quarter deck: 1.57" / 40 mm

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

Machinery:
   Oil fired boilers, steam turbines,
   Geared drive, 4 shafts, 100,723 shp / 75,139 Kw = 27.00 kts
   Range 10,000nm at 14.00 kts
   Bunker at max displacement = 4,825 tons

Complement:
   1,326 - 1,725

Cost:
   £8.036 million / $32.144 million

Distribution of weights at normal displacement:
   Armament: 2,968 tons, 8.1 %
      - Guns: 2,968 tons, 8.1 %
   Armour: 13,020 tons, 35.4 %
      - Belts: 4,726 tons, 12.9 %
      - Torpedo bulkhead: 869 tons, 2.4 %
      - Armament: 2,569 tons, 7.0 %
      - Armour Deck: 4,594 tons, 12.5 %
      - Conning Towers: 263 tons, 0.7 %
   Machinery: 3,417 tons, 9.3 %
   Hull, fittings & equipment: 12,566 tons, 34.2 %
   Fuel, ammunition & stores: 4,279 tons, 11.6 %
   Miscellaneous weights: 517 tons, 1.4 %
      - Hull above water: 196 tons
      - On freeboard deck: 100 tons
      - Above deck: 221 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     57,394 lbs / 26,033 Kg = 40.3 x 14.2 " / 360 mm shells or 10.1 torpedoes
   Stability (Unstable if below 1.00): 1.18
   Metacentric height 8.0 ft / 2.4 m
   Roll period: 16.6 seconds
   Steadiness   - As gun platform (Average = 50 %): 71 %
         - Recoil effect (Restricted arc if above 1.00): 0.42
   Seaboat quality  (Average = 1.00): 1.07

Hull form characteristics:
   Hull has a flush deck,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0.590 / 0.596
   Length to Beam Ratio: 6.18 : 1
   'Natural speed' for length: 26.25 kts
   Power going to wave formation at top speed: 52 %
   Trim (Max stability = 0, Max steadiness = 100): 66
   Bow angle (Positive = bow angles forward): 10.00 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 %,  28.87 ft / 8.80 m,  23.62 ft / 7.20 m
      - Forward deck:   30.00 %,  23.62 ft / 7.20 m,  18.37 ft / 5.60 m
      - Aft deck:   35.00 %,  18.37 ft / 5.60 m,  18.37 ft / 5.60 m
      - Quarter deck:   15.00 %,  18.37 ft / 5.60 m,  18.37 ft / 5.60 m
      - Average freeboard:      20.63 ft / 6.29 m

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 75.3 %
      - Above water (accommodation/working, high = better): 156.7 %
   Waterplane Area: 55,687 Square feet or 5,173 Square metres
   Displacement factor (Displacement / loading): 111 %
   Structure weight / hull surface area: 192 lbs/sq ft or 938 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.97
      - Longitudinal: 1.32
      - Overall: 1.00
   Excellent machinery, storage, compartmentation space
   Excellent accommodation and workspace room
   Ship has slow, easy roll, a good, steady gun platform

100t - Provision for 2x Spotter plane and Catapult
292t - 1918 FC
50t - NF Devices x 2
25t - LR Wireless
100t - Flag Facilities

[TacCovert4]

And finally, as variation on the theme, a 30kt Fast BB.  Belt armor is reduced slightly, and freeboard is raised the necessary amount to give her passable seakeeping at top speed....though obviously she'd be a much better sailing boat at cruising speed with that freeboard.  The 3 triples are retained rather than the 4 triples, but most of the tonnage for the 4th triple has gone into the engines to push this ship up to proper 'cruiser' speeds.

Conqueror, Aztec Battleship laid down 1922

Displacement:
   37,493 t light; 39,199 t standard; 42,129 t normal; 44,474 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (743.40 ft / 738.19 ft) x 116.47 ft x (29.07 / 30.40 ft)
   (226.59 m / 225.00 m) x 35.50 m  x (8.86 / 9.27 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, 1922 Model
     3 x 3-gun mounts on centreline ends, majority forward
      1 raised mount - 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, 1922 Model
     8 x Twin mounts on sides, evenly spread
      6 - 2.76" / 70.0 mm 50.0 cal guns - 11.08lbs / 5.03kg shells, 300 per gun
     Anti-air guns in deck mounts, 1922 Model
     6 x Single mounts on sides, evenly spread
      6 raised mounts
      16 - 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, 1922 Model
     8 x Twin mounts on side ends, evenly spread
      4 raised mounts - superfiring
      Weight of broadside 14,137 lbs / 6,413 kg

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   13.0" / 330 mm   479.82 ft / 146.25 m   16.40 ft / 5.00 m
   Ends:   2.76" / 70 mm   258.33 ft / 78.74 m   11.48 ft / 3.50 m
     Main Belt covers 100 % of normal length

   - Torpedo Bulkhead - Additional damage containing bulkheads:
      1.57" / 40 mm   479.82 ft / 146.25 m   27.23 ft / 8.30 m
   Beam between torpedo bulkheads 95.14 ft / 29.00 m

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   13.8" / 350 mm   5.91" / 150 mm      13.0" / 330 mm
   2nd:   2.76" / 70 mm   1.38" / 35 mm      2.76" / 70 mm
   4th:         -            -         0.98" / 25 mm

   - Armoured deck - multiple decks:
   For and Aft decks: 5.12" / 130 mm
   Forecastle: 1.18" / 30 mm  Quarter deck: 1.57" / 40 mm

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

Machinery:
   Oil fired boilers, steam turbines,
   Geared drive, 4 shafts, 162,249 shp / 121,038 Kw = 30.00 kts
   Range 10,000nm at 14.00 kts
   Bunker at max displacement = 5,275 tons

Complement:
   1,469 - 1,911

Cost:
   £9.311 million / $37.243 million

Distribution of weights at normal displacement:
   Armament: 2,968 tons, 7.0 %
      - Guns: 2,968 tons, 7.0 %
   Armour: 13,677 tons, 32.5 %
      - Belts: 4,774 tons, 11.3 %
      - Torpedo bulkhead: 761 tons, 1.8 %
      - Armament: 2,715 tons, 6.4 %
      - Armour Deck: 5,139 tons, 12.2 %
      - Conning Towers: 288 tons, 0.7 %
   Machinery: 5,504 tons, 13.1 %
   Hull, fittings & equipment: 14,828 tons, 35.2 %
   Fuel, ammunition & stores: 4,636 tons, 11.0 %
   Miscellaneous weights: 517 tons, 1.2 %
      - Hull above water: 196 tons
      - On freeboard deck: 100 tons
      - Above deck: 221 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     62,969 lbs / 28,562 Kg = 44.2 x 14.2 " / 360 mm shells or 9.6 torpedoes
   Stability (Unstable if below 1.00): 1.16
   Metacentric height 8.3 ft / 2.5 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): 1.02

Hull form characteristics:
   Hull has a flush deck,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0.590 / 0.595
   Length to Beam Ratio: 6.34 : 1
   'Natural speed' for length: 27.17 kts
   Power going to wave formation at top speed: 56 %
   Trim (Max stability = 0, Max steadiness = 100): 69
   Bow angle (Positive = bow angles forward): 10.00 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 %,  29.53 ft / 9.00 m,  26.25 ft / 8.00 m
      - Forward deck:   30.00 %,  26.25 ft / 8.00 m,  22.97 ft / 7.00 m
      - Aft deck:   35.00 %,  22.97 ft / 7.00 m,  22.97 ft / 7.00 m
      - Quarter deck:   15.00 %,  22.97 ft / 7.00 m,  22.97 ft / 7.00 m
      - Average freeboard:      24.38 ft / 7.43 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 88.3 %
      - Above water (accommodation/working, high = better): 191.6 %
   Waterplane Area: 62,296 Square feet or 5,788 Square metres
   Displacement factor (Displacement / loading): 111 %
   Structure weight / hull surface area: 196 lbs/sq ft or 956 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.96
      - Longitudinal: 1.38
      - Overall: 1.00
   Adequate machinery, storage, compartmentation space
   Excellent accommodation and workspace room
   Ship has slow, easy roll, a good, steady gun platform

100t - Provision for 2x Spotter plane and Catapult
292t - 1918 FC
50t - NF Devices x 2
25t - LR Wireless
100t - Flag Facilities

[The Rock Doctor]

The quarterdeck armor makes me nervous, given that I believe the steering gear is under it.  It won't suck up a lot of tonnage to improve it, I don't think.

[TacCovert4]

Yeah, I'll probably wind up making some tweaks.  Mostly I'm working through the broad strokes of the 3 types I can get with the available equipment:

1)  12 x 14in guns at moderate-fast speed
2)  9 x 14in guns, a lot lighter at moderate-fast speed
3)  9 x 14in guns, and at true BC speeds

[eltf177]

The miscellaneous weight numbers aren't adding up for me, and you don't have enough miscellaneous weight for both a catapult and crane...

[TacCovert4]

The miscellaneous weight numbers aren't adding up for me, and you don't have enough miscellaneous weight for both a catapult and crane...

Yeah, there will need to be some tweaks, these are 'general representative designs, not a final product.  Mostly I roughed out 3 variations on a Fast Battleship and am trying to decide which one is the better one to fine tune, a 27 knotter or a 30 knotter.....and then a 12 x 36cm or a 9 x 36cm.  A decision of cost/build time vs firepower vs speed......

[TacCovert4]

Another design proposal accepts that deck armor is progressively more important on the high seas with the extended ranges that are anticipated for gunfights.  For the possibility of closer-ranged engagements, the belt is backed by the deck slopes.  This is an effort to make a 27kt battleship with modern amenities on the lightest tonnage possible.  (IRL it's actually not too far off in protection from the NC class).

BB-X, Aztec Battleship laid down 1922

Displacement:
   28,737 t light; 30,230 t standard; 32,475 t normal; 34,271 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (684.21 ft / 675.85 ft) x 101.71 ft x (27.56 / 28.81 ft)
   (208.55 m / 206.00 m) x 31.00 m  x (8.40 / 8.78 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, 1922 Model
     3 x 3-gun mounts on centreline ends, majority forward
      1 raised mount - superfiring
      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, 1922 Model
     6 x Twin mounts on sides, evenly spread
     1 x Twin mount on centreline, aft deck centre
      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, 1922 Model
     6 x Single mounts on centreline, evenly spread
      6 raised mounts
      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, 1922 Model
     4 x Twin mounts on side ends, evenly spread
      Weight of broadside 13,988 lbs / 6,345 kg

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   11.3" / 288 mm   447.83 ft / 136.50 m   16.40 ft / 5.00 m
   Ends:   Unarmoured
     Main Belt covers 102 % of normal length

   - Torpedo Bulkhead - Additional damage containing bulkheads:
      1.18" / 30 mm   447.83 ft / 136.50 m   26.12 ft / 7.96 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
   4th:         -            -         0.98" / 25 mm

   - Protected deck - multiple decks:
   For and Aft decks: 5.31" / 135 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, 93,226 shp / 69,547 Kw = 27.00 kts
   Range 9,000nm at 14.00 kts
   Bunker at max displacement = 4,041 tons

Complement:
   1,209 - 1,572

Cost:
   £7.537 million / $30.147 million

Distribution of weights at normal displacement:
   Armament: 2,931 tons, 9.0 %
      - Guns: 2,931 tons, 9.0 %
   Armour: 10,768 tons, 33.2 %
      - Belts: 3,599 tons, 11.1 %
      - Torpedo bulkhead: 511 tons, 1.6 %
      - Armament: 2,110 tons, 6.5 %
      - Armour Deck: 4,307 tons, 13.3 %
      - Conning Towers: 242 tons, 0.7 %
   Machinery: 3,162 tons, 9.7 %
   Hull, fittings & equipment: 11,447 tons, 35.3 %
   Fuel, ammunition & stores: 3,738 tons, 11.5 %
   Miscellaneous weights: 428 tons, 1.3 %
      - Hull above water: 147 tons
      - On freeboard deck: 85 tons
      - Above deck: 196 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     46,913 lbs / 21,279 Kg = 33.0 x 14.2 " / 360 mm shells or 7.2 torpedoes
   Stability (Unstable if below 1.00): 1.12
   Metacentric height 6.4 ft / 2.0 m
   Roll period: 16.9 seconds
   Steadiness   - As gun platform (Average = 50 %): 70 %
         - Recoil effect (Restricted arc if above 1.00): 0.61
   Seaboat quality  (Average = 1.00): 1.09

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: 6.65 : 1
   'Natural speed' for length: 26.00 kts
   Power going to wave formation at top speed: 52 %
   Trim (Max stability = 0, Max steadiness = 100): 64
   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 %,  22.97 ft / 7.00 m,  21.33 ft / 6.50 m
      - Forward deck:   30.00 %,  21.33 ft / 6.50 m,  19.69 ft / 6.00 m
      - Aft deck:   35.00 %,  19.69 ft / 6.00 m,  19.69 ft / 6.00 m
      - Quarter deck:   15.00 %,  19.69 ft / 6.00 m,  19.69 ft / 6.00 m
      - Average freeboard:      20.39 ft / 6.22 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 89.5 %
      - Above water (accommodation/working, high = better): 158.9 %
   Waterplane Area: 50,274 Square feet or 4,671 Square metres
   Displacement factor (Displacement / loading): 108 %
   Structure weight / hull surface area: 190 lbs/sq ft or 930 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.97
      - Longitudinal: 1.34
      - Overall: 1.00
   Adequate machinery, storage, compartmentation space
   Excellent accommodation and workspace room
   Ship has slow, easy roll, a good, steady gun platform

293t - 1918 FC
25t - LR Wireless
25t - 1918 NF Devices
85t - Provision for 2 armed spotter planes w/Cats and Crane

Belt is 300m above water, bottom 2.5m tapering to 250mm

[Kaiser Kirk]

The "Other gunhouse" numbers bother me.
Perhaps it's a design choice.

That is not *just* the turret roof.
That's the turret sides as well...and rear.

While hopefully you'll always have the turret face towards the foe,
and any longer battle line will only have oblique shots,
even an angled hit will likely punch through.

As for the Quarterdeck issue... I have it on Parthian ships too,
all that's really back there is shafts and steering chains, the former large enough to laugh at splinters the latter fixable after a little bit.
Still, the stern angle is small enough it's not much weight and I've started putting more serious armor there.

The 30mm TDS on the most recent ship seems slightly weak, but with 3.5m deep it may work out.
As the radius from the explosion grows, the surface area massively increases, and the energy per unit area drops, so the deeper in the better thinner bulkheads should work.
While I know there's a waterjet factor, I don't know how to factor that, and depth helps there too.

[TacCovert4]

Yeah I keep running into the issue of trying to fit a quart in a pint pot.

I can build out a 35,000 tonner that's probably moderately competitive, but I don't have a 400mm gun and don't anticipate having one for at least another 3 years or so.  I can build more Monarch-style (Nelson) Battleships that are pretty darn tough, but they also are slow and relatively short ranged compared to the rest.  They're good for the Caribbean, but not much else. 

If the Battleships hadn't jumped to 27kts everywhere else, I could have been building some battlecruisers at 28kts with 9x360 and call it a day.  What this fast BB concept is....is how to get something that's reasonably ok as a BB, on a budget.

I'll probably accept an increase in tonnage by about a thousand tons, and see if I can't squeeze another inch into the TDS, and probably about another inch into the turrets to make them 170-180mm.

[Kaiser Kirk]

For my part I was happy to explore the slow & steady concept of the Speed/armor/guns triangle,
but that increase of speed is starting to be noticeable.   
While I have strong doubts about the value of speed for battleline dreadnaughts,
and I will probably still build the Kalifern class, they will be my last 20knotters
and the Stormbringer class will be the template beyond that.

[Jefgte]

...While I have strong doubts about the value of speed for battleline dreadnaughts...

The latest 20-21kt battleships that Parthia and Byzantium build are particularly powerful. They don't fear being overtaken by the 27-30kts.

"HMS Hood overtakes USS Tennessee and USS Tennessee sinks HMS Hood"

[TacCovert4]

That's the Monarch class philosophy.  Ok, so we're only 24kts, and only 27,000t.  You bring your 35,000t ship over here and still can't punch holes in our citadel while we rip you apart.