Imperial Roman Navy: 1926-1930 Designs

[snip]

New thread relevantly named to my 5-year build plans. Getting a start on this early because there are a lot of planned refits, from simple armament refreshes to (possibly) some more major rebuilds, which will take time to effort out costs and such. Currently the plan looks like this, with the general idea of what Im looking for with that class.

--Three Fast Battleships. These are basically going to be improved Empress Amelia's.
--Two Armored Cruisers. Something more along the lines of "smol fast battleship" than the "overspecialized counter-raiders" which came before given the Fast Battleships exist.
--Two Aviation Ships. These will ether be minor improvements on the first flattop I'm planning to start in 1924, or something in the vein of Tone. Maybe one of each.
--Five Cruisers. Current plans look like somethign smaller than the current GPC-21 class.
--Ten Heavy Destroyers. Expect an update to the HFD-21 class
--Twenty General Destroyers. Expect an update to the GFD-21 class. These will allow for the phase out of more pre-Caicos destroyers to other duties or the scapyard.
--One "Experimental" ship, which I think may turn into my first underway oiler
--Ten 750t Subs (best avalible table type)
--150 Light Torpedo Craft(best available table 40t MTB type). This should complete the refresh of the Light Torpedo forces.
--Fourteen Auxiliaries. Thinking an updated Custodi design.

[snip]

The AC is all I have been playing with so far. Intended more for general use duties rather than explicit counter-raider work, the design uses some new AA guns which are slated to begin development in 1924

AC-26, Imperial Roman Armored Cruiser laid down 1926

Displacement:
   16,000 t light; 16,667 t standard; 18,002 t normal; 19,070 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (639.77 ft / 626.64 ft) x 75.46 ft x (22.97 / 24.07 ft)
   (195.00 m / 191.00 m) x 23.00 m  x (7.00 / 7.34 m)

Armament:
      8 - 9.25" / 235 mm 45.0 cal guns - 396.83lbs / 180.00kg shells, 125 per gun
     Breech loading guns in turret on barbette mounts, 1919 Model
     4 x 2-gun mounts on centreline ends, evenly spread
      2 raised mounts - superfiring
      6 - 5.51" / 140 mm 55.0 cal guns - 83.78lbs / 38.00kg shells, 175 per gun
     Quick firing guns in deck and hoist mounts, 1909 Model
     6 x Single mounts on sides, evenly spread
      2 - 3.54" / 90.0 mm 50.0 cal guns - 20.94lbs / 9.50kg shells, 250 per gun
     Anti-air guns in deck and hoist mounts, 1926 Model
     2 x Single mounts on sides, aft deck forward
      2 raised mounts
      6 - 2.24" / 57.0 mm 55.0 cal guns - 6.06lbs / 2.75kg shells, 750 per gun
     Anti-air guns in deck mounts, 1926 Model
     6 x Single mounts on sides, evenly spread
      6 raised mounts
      8 - 1.10" / 28.0 mm 55.0 cal guns - 0.73lbs / 0.33kg shells, 5,000 per gun
     Anti-air guns in deck mounts, 1926 Model
     2 x Quad mounts on sides, forward deck centre
      2 raised mounts
      Weight of broadside 3,761 lbs / 1,706 kg

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   6.30" / 160 mm   407.32 ft / 124.15 m   18.04 ft / 5.50 m
   Ends:   1.97" / 50 mm   219.29 ft / 66.84 m   10.43 ft / 3.18 m
     Main Belt covers 100 % of normal length

   - Torpedo Bulkhead - Additional damage containing bulkheads:
      0.79" / 20 mm   407.32 ft / 124.15 m   24.61 ft / 7.50 m
   Beam between torpedo bulkheads 60.70 ft / 18.50 m

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   9.25" / 235 mm   3.94" / 100 mm      7.48" / 190 mm
   2nd:   1.97" / 50 mm   0.59" / 15 mm      1.97" / 50 mm
   3rd:   0.20" / 5 mm         -         0.59" / 15 mm
   4th:   0.20" / 5 mm         -               -

   - Armoured deck - multiple decks:
   For and Aft decks: 2.95" / 75 mm
   Forecastle: 1.38" / 35 mm  Quarter deck: 1.38" / 35 mm

   - Conning towers: Forward 9.84" / 250 mm, Aft 0.00" / 0 mm

Machinery:
   Oil fired boilers, steam turbines,
   Geared drive, 4 shafts, 100,000 shp / 74,600 Kw = 30.19 kts
   Range 8,000nm at 14.00 kts
   Bunker at max displacement = 2,404 tons

Complement:
   776 - 1,010

Cost:
   £4.761 million / $19.042 million

Distribution of weights at normal displacement:
   Armament: 1,093 tons, 6.1 %
      - Guns: 1,093 tons, 6.1 %
   Armour: 5,181 tons, 28.8 %
      - Belts: 2,116 tons, 11.8 %
      - Torpedo bulkhead: 292 tons, 1.6 %
      - Armament: 944 tons, 5.2 %
      - Armour Deck: 1,684 tons, 9.4 %
      - Conning Tower: 146 tons, 0.8 %
   Machinery: 3,201 tons, 17.8 %
   Hull, fittings & equipment: 5,875 tons, 32.6 %
   Fuel, ammunition & stores: 2,002 tons, 11.1 %
   Miscellaneous weights: 650 tons, 3.6 %
      - Hull below water: 200 tons
      - Hull above water: 200 tons
      - On freeboard deck: 200 tons
      - Above deck: 50 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     25,839 lbs / 11,720 Kg = 65.3 x 9.3 " / 235 mm shells or 3.6 torpedoes
   Stability (Unstable if below 1.00): 1.16
   Metacentric height 4.3 ft / 1.3 m
   Roll period: 15.3 seconds
   Steadiness   - As gun platform (Average = 50 %): 51 %
         - Recoil effect (Restricted arc if above 1.00): 0.45
   Seaboat quality  (Average = 1.00): 1.03

Hull form characteristics:
   Hull has rise forward of midbreak,
     a normal bow and a round stern
   Block coefficient (normal/deep): 0.580 / 0.586
   Length to Beam Ratio: 8.30 : 1
   'Natural speed' for length: 25.03 kts
   Power going to wave formation at top speed: 57 %
   Trim (Max stability = 0, Max steadiness = 100): 49
   Bow angle (Positive = bow angles forward): 20.00 degrees
   Stern overhang: 3.87 ft / 1.18 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
      - Forecastle:   20.00 %,  25.43 ft / 7.75 m,  25.43 ft / 7.75 m
      - Forward deck:   35.00 %,  25.43 ft / 7.75 m,  24.61 ft / 7.50 m
      - Aft deck:   30.00 %,  16.40 ft / 5.00 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:      21.22 ft / 6.47 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 99.1 %
      - Above water (accommodation/working, high = better): 175.3 %
   Waterplane Area: 33,947 Square feet or 3,154 Square metres
   Displacement factor (Displacement / loading): 114 %
   Structure weight / hull surface area: 130 lbs/sq ft or 635 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.97
      - Longitudinal: 1.25
      - Overall: 1.00
   Adequate machinery, storage, compartmentation space
   Excellent accommodation and workspace room

[Kaiser Kirk]

New thread relevantly named to my 5-year build plans. Getting a start on this early because there are a lot of planned refits, from simple armament refreshes to (possibly) some more major rebuilds, which will take time to effort out costs and such. Currently the plan looks like this, with the general idea of what Im looking for with that class.

Yikes.
I have a slew of '1924' ships, but no real build plan anymore.
Every time I try to make one, it rapidly becomes ...off...as I discover new priorities.
:)

On the AC, I think it's a little light, but I'm not sure who the OPFOR is. Makes it hard to evaluate.
I've got similar vessels- either the older/slower Asbaras, or the new Zemakas,
while  the Aztec have similar vessels in the Razee classes, the Norse Selkirk is similar and presumably will see successors.

In terms of details, the 20mm TDS has a 4.5 depth, that's 2.25/side for a very light bulkhead.
Should be good vs a mine, or a 1915 AC's 14" aerial torpedo, but I'd be surprised if it held under a decent torpedo.
The 1906 "test 1" caisson had a 4m depth and 20mm and was successful vs 180lbs of Guncotton about the same as 100lbs of TNT.
That's nearly twice the width vs. a basically 18" torp.

[The Rock Doctor]

Have to admit I was expecting quads for the main battery.

[Jefgte]

Byzantium also has somewhat slower ACs.
Roman preferred to build BCs or very fast cruisers.
Building medium cruisers allows for more.
How many planned in the PLAN ?

[snip]

Byzantium also has somewhat slower ACs.
Roman preferred to build BCs or very fast cruisers.
Building medium cruisers allows for more.
How many planned in the PLAN ?

Two planned.

Have to admit I was expecting quads for the main battery.

As much as it pains me, quad 235s just require a bigger ship than I can make a pair of.

New thread relevantly named to my 5-year build plans. Getting a start on this early because there are a lot of planned refits, from simple armament refreshes to (possibly) some more major rebuilds, which will take time to effort out costs and such. Currently the plan looks like this, with the general idea of what Im looking for with that class.

Yikes.
I have a slew of '1924' ships, but no real build plan anymore.
Every time I try to make one, it rapidly becomes ...off...as I discover new priorities.
:)

On the AC, I think it's a little light, but I'm not sure who the OPFOR is. Makes it hard to evaluate.
I've got similar vessels- either the older/slower Asbaras, or the new Zemakas,
while  the Aztec have similar vessels in the Razee classes, the Norse Selkirk is similar and presumably will see successors.

In terms of details, the 20mm TDS has a 4.5 depth, that's 2.25/side for a very light bulkhead.
Should be good vs a mine, or a 1915 AC's 14" aerial torpedo, but I'd be surprised if it held under a decent torpedo.
The 1906 "test 1" caisson had a 4m depth and 20mm and was successful vs 180lbs of Guncotton about the same as 100lbs of TNT.
That's nearly twice the width vs. a basically 18" torp.

I can most likely add 1000t without radical alterations to the build plan, will fiddle and see what that gets me.

[snip]

What 1000t buys me:
--A little more buffer on the 30knt minimum (keeping 100k shp only got me to 29.8, so need 110k for even numbers)
--Double the TDS thickness (with .1m less distance overall to keep the engines within the citadel)
--5mm more thickness on the belt
--A 10 degree incline on the belt

AC-26B, Imperial Roman Armored Cruiser laid down 1926

Displacement:
   17,000 t light; 17,688 t standard; 19,077 t normal; 20,189 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (639.77 ft / 626.64 ft) x 75.46 ft x (22.97 / 24.08 ft)
   (195.00 m / 191.00 m) x 23.00 m  x (7.00 / 7.34 m)

Armament:
      8 - 9.25" / 235 mm 45.0 cal guns - 396.83lbs / 180.00kg shells, 125 per gun
     Breech loading guns in turret on barbette mounts, 1919 Model
     4 x 2-gun mounts on centreline ends, evenly spread
      2 raised mounts - superfiring
      6 - 5.51" / 140 mm 55.0 cal guns - 83.78lbs / 38.00kg shells, 175 per gun
     Quick firing guns in deck and hoist mounts, 1909 Model
     6 x Single mounts on sides, evenly spread
      2 - 3.54" / 90.0 mm 50.0 cal guns - 20.94lbs / 9.50kg shells, 250 per gun
     Anti-air guns in deck and hoist mounts, 1926 Model
     2 x Single mounts on sides, aft deck forward
      2 raised mounts
      6 - 2.24" / 57.0 mm 55.0 cal guns - 6.06lbs / 2.75kg shells, 750 per gun
     Anti-air guns in deck mounts, 1926 Model
     6 x Single mounts on sides, evenly spread
      6 raised mounts
      8 - 1.10" / 28.0 mm 55.0 cal guns - 0.73lbs / 0.33kg shells, 5,000 per gun
     Anti-air guns in deck mounts, 1926 Model
     2 x Quad mounts on sides, forward deck centre
      2 raised mounts
      Weight of broadside 3,761 lbs / 1,706 kg

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   6.50" / 165 mm   407.32 ft / 124.15 m   18.32 ft / 5.59 m
   Ends:   1.97" / 50 mm   219.29 ft / 66.84 m   10.43 ft / 3.18 m
     Main Belt covers 100 % of normal length
     Main Belt inclined 10.00 degrees (positive = in)

   - Torpedo Bulkhead - Additional damage containing bulkheads:
      1.57" / 40 mm   407.32 ft / 124.15 m   24.61 ft / 7.50 m
   Beam between torpedo bulkheads 61.02 ft / 18.60 m

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   9.25" / 235 mm   3.94" / 100 mm      7.48" / 190 mm
   2nd:   1.97" / 50 mm   0.59" / 15 mm      1.97" / 50 mm
   3rd:   0.20" / 5 mm         -         0.59" / 15 mm
   4th:   0.20" / 5 mm         -               -

   - Armoured deck - multiple decks:
   For and Aft decks: 2.95" / 75 mm
   Forecastle: 1.38" / 35 mm  Quarter deck: 1.38" / 35 mm

   - Conning towers: Forward 9.84" / 250 mm, Aft 0.00" / 0 mm

Machinery:
   Oil fired boilers, steam turbines,
   Geared drive, 4 shafts, 110,000 shp / 82,060 Kw = 30.51 kts
   Range 8,000nm at 14.00 kts
   Bunker at max displacement = 2,501 tons

Complement:
   811 - 1,055

Cost:
   £5.036 million / $20.145 million

Distribution of weights at normal displacement:
   Armament: 1,093 tons, 5.7 %
      - Guns: 1,093 tons, 5.7 %
   Armour: 5,632 tons, 29.5 %
      - Belts: 2,214 tons, 11.6 %
      - Torpedo bulkhead: 584 tons, 3.1 %
      - Armament: 944 tons, 4.9 %
      - Armour Deck: 1,739 tons, 9.1 %
      - Conning Tower: 151 tons, 0.8 %
   Machinery: 3,521 tons, 18.5 %
   Hull, fittings & equipment: 6,104 tons, 32.0 %
   Fuel, ammunition & stores: 2,077 tons, 10.9 %
   Miscellaneous weights: 650 tons, 3.4 %
      - Hull below water: 200 tons
      - Hull above water: 200 tons
      - On freeboard deck: 200 tons
      - Above deck: 50 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     27,623 lbs / 12,530 Kg = 69.8 x 9.3 " / 235 mm shells or 3.9 torpedoes
   Stability (Unstable if below 1.00): 1.16
   Metacentric height 4.3 ft / 1.3 m
   Roll period: 15.2 seconds
   Steadiness   - As gun platform (Average = 50 %): 50 %
         - Recoil effect (Restricted arc if above 1.00): 0.46
   Seaboat quality  (Average = 1.00): 1.01

Hull form characteristics:
   Hull has rise forward of midbreak,
     a normal bow and a round stern
   Block coefficient (normal/deep): 0.615 / 0.621
   Length to Beam Ratio: 8.30 : 1
   'Natural speed' for length: 25.03 kts
   Power going to wave formation at top speed: 58 %
   Trim (Max stability = 0, Max steadiness = 100): 50
   Bow angle (Positive = bow angles forward): 20.00 degrees
   Stern overhang: 3.87 ft / 1.18 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
      - Forecastle:   20.00 %,  25.43 ft / 7.75 m,  25.43 ft / 7.75 m
      - Forward deck:   45.00 %,  25.43 ft / 7.75 m,  24.61 ft / 7.50 m
      - Aft deck:   20.00 %,  16.40 ft / 5.00 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:      22.08 ft / 6.73 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 99.8 %
      - Above water (accommodation/working, high = better): 184.2 %
   Waterplane Area: 35,064 Square feet or 3,258 Square metres
   Displacement factor (Displacement / loading): 113 %
   Structure weight / hull surface area: 130 lbs/sq ft or 635 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.97
      - Longitudinal: 1.28
      - Overall: 1.00
   Adequate machinery, storage, compartmentation space
   Excellent accommodation and workspace room

[The Rock Doctor]

Maybe take that 5mm extra belt thickness and use the weight to increase the bow height to get rid of that wet forward warning?

[snip]

Can get there without any alterations to anything other than freeboard.

AC-26B, Imperial Roman Armored Cruiser laid down 1926

Displacement:
   16,999 t light; 17,688 t standard; 19,077 t normal; 20,189 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (639.78 ft / 626.64 ft) x 75.46 ft x (22.97 / 24.08 ft)
   (195.00 m / 191.00 m) x 23.00 m  x (7.00 / 7.34 m)

Armament:
      8 - 9.25" / 235 mm 45.0 cal guns - 396.83lbs / 180.00kg shells, 125 per gun
     Breech loading guns in turret on barbette mounts, 1919 Model
     4 x 2-gun mounts on centreline ends, evenly spread
      2 raised mounts - superfiring
      6 - 5.51" / 140 mm 55.0 cal guns - 83.78lbs / 38.00kg shells, 175 per gun
     Quick firing guns in deck and hoist mounts, 1909 Model
     6 x Single mounts on sides, evenly spread
      2 - 3.54" / 90.0 mm 50.0 cal guns - 20.94lbs / 9.50kg shells, 250 per gun
     Anti-air guns in deck and hoist mounts, 1926 Model
     2 x Single mounts on sides, aft deck forward
      2 raised mounts
      6 - 2.24" / 57.0 mm 55.0 cal guns - 6.06lbs / 2.75kg shells, 750 per gun
     Anti-air guns in deck mounts, 1926 Model
     6 x Single mounts on sides, evenly spread
      6 raised mounts
      8 - 1.10" / 28.0 mm 55.0 cal guns - 0.73lbs / 0.33kg shells, 5,000 per gun
     Anti-air guns in deck mounts, 1926 Model
     2 x Quad mounts on sides, forward deck centre
      2 raised mounts
      Weight of broadside 3,761 lbs / 1,706 kg

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   6.50" / 165 mm   407.32 ft / 124.15 m   18.32 ft / 5.59 m
   Ends:   1.97" / 50 mm   219.29 ft / 66.84 m   10.43 ft / 3.18 m
     Main Belt covers 100 % of normal length
     Main Belt inclined 10.00 degrees (positive = in)

   - Torpedo Bulkhead - Additional damage containing bulkheads:
      1.57" / 40 mm   407.32 ft / 124.15 m   24.61 ft / 7.50 m
   Beam between torpedo bulkheads 61.02 ft / 18.60 m

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   9.25" / 235 mm   3.94" / 100 mm      7.48" / 190 mm
   2nd:   1.97" / 50 mm   0.59" / 15 mm      1.97" / 50 mm
   3rd:   0.20" / 5 mm         -         0.59" / 15 mm
   4th:   0.20" / 5 mm         -               -

   - Armoured deck - multiple decks:
   For and Aft decks: 2.95" / 75 mm
   Forecastle: 1.38" / 35 mm  Quarter deck: 1.38" / 35 mm

   - Conning towers: Forward 9.84" / 250 mm, Aft 0.00" / 0 mm

Machinery:
   Oil fired boilers, steam turbines,
   Geared drive, 4 shafts, 110,000 shp / 82,060 Kw = 30.51 kts
   Range 8,000nm at 14.00 kts
   Bunker at max displacement = 2,501 tons

Complement:
   811 - 1,055

Cost:
   £5.036 million / $20.145 million

Distribution of weights at normal displacement:
   Armament: 1,093 tons, 5.7 %
      - Guns: 1,093 tons, 5.7 %
   Armour: 5,632 tons, 29.5 %
      - Belts: 2,214 tons, 11.6 %
      - Torpedo bulkhead: 584 tons, 3.1 %
      - Armament: 944 tons, 4.9 %
      - Armour Deck: 1,739 tons, 9.1 %
      - Conning Tower: 151 tons, 0.8 %
   Machinery: 3,521 tons, 18.5 %
   Hull, fittings & equipment: 6,103 tons, 32.0 %
   Fuel, ammunition & stores: 2,078 tons, 10.9 %
   Miscellaneous weights: 650 tons, 3.4 %
      - Hull below water: 200 tons
      - Hull above water: 200 tons
      - On freeboard deck: 200 tons
      - Above deck: 50 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     27,659 lbs / 12,546 Kg = 69.8 x 9.3 " / 235 mm shells or 3.9 torpedoes
   Stability (Unstable if below 1.00): 1.17
   Metacentric height 4.4 ft / 1.3 m
   Roll period: 15.2 seconds
   Steadiness   - As gun platform (Average = 50 %): 50 %
         - Recoil effect (Restricted arc if above 1.00): 0.46
   Seaboat quality  (Average = 1.00): 1.01

Hull form characteristics:
   Hull has rise forward of midbreak,
     a normal bow and a round stern
   Block coefficient (normal/deep): 0.615 / 0.621
   Length to Beam Ratio: 8.30 : 1
   'Natural speed' for length: 25.03 kts
   Power going to wave formation at top speed: 58 %
   Trim (Max stability = 0, Max steadiness = 100): 49
   Bow angle (Positive = bow angles forward): 20.00 degrees
   Stern overhang: 2.99 ft / 0.91 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
      - Forecastle:   20.00 %,  27.89 ft / 8.50 m,  25.43 ft / 7.75 m
      - Forward deck:   45.00 %,  25.43 ft / 7.75 m,  24.61 ft / 7.50 m
      - Aft deck:   20.00 %,  16.40 ft / 5.00 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:      22.28 ft / 6.79 m

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 99.8 %
      - Above water (accommodation/working, high = better): 184.2 %
   Waterplane Area: 35,066 Square feet or 3,258 Square metres
   Displacement factor (Displacement / loading): 113 %
   Structure weight / hull surface area: 130 lbs/sq ft or 634 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.97
      - Longitudinal: 1.29
      - Overall: 1.00
   Adequate machinery, storage, compartmentation space
   Excellent accommodation and workspace room

[snip]

Looking at a scout cruiser, but updated for the fact that planes are apparently quite good at finding ships now. Fundamentally this is just a stretched GPC-21 (which itself will be updated for the 1926 program) to give room for larger aviation facilities. This is intended to provide airborne scouting capabilities to the fleet, eventually augmented by catapult aircraft from other ships.

ASC-26, Imperial Roman Aviation Scout Cruiser laid down 1926

Displacement:
   11,100 t light; 11,550 t standard; 13,030 t normal; 14,214 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (639.76 ft / 623.35 ft) x 63.98 ft x (21.33 / 22.83 ft)
   (195.00 m / 190.00 m) x 19.50 m  x (6.50 / 6.96 m)

Armament:
      8 - 7.09" / 180 mm 50.0 cal guns - 187.39lbs / 85.00kg shells, 150 per gun
     Breech loading guns in turret on barbette mounts, 1915 Model
     4 x 2-gun mounts on centreline, forward evenly spread
      1 raised mount
      4 - 5.51" / 140 mm 55.0 cal guns - 85.98lbs / 39.00kg shells, 150 per gun
     Breech loading guns in deck and hoist mounts, 1909 Model
     2 x Twin mounts on sides, forward deck aft
      4 - 3.54" / 90.0 mm 50.0 cal guns - 20.94lbs / 9.50kg shells, 250 per gun
     Anti-air guns in deck and hoist mounts, 1926 Model
     2 x Single mounts on sides, forward deck aft
      2 raised mounts
     2 x Single mounts on sides, aft deck forward
      2 double raised mounts
      12 - 1.10" / 28.0 mm 55.0 cal guns - 0.72lbs / 0.33kg shells, 5,000 per gun
     Anti-air guns in deck and hoist mounts, 1926 Model
     2 x Quad mounts on sides, forward deck aft
      2 raised mounts
     1 x Quad mount on centreline, forward deck aft
      1 double raised mount
      Weight of broadside 1,936 lbs / 878 kg

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   3.15" / 80 mm   425.98 ft / 129.84 m   16.40 ft / 5.00 m
   Ends:   Unarmoured
     Main Belt covers 105 % of normal length

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   2.36" / 60 mm   1.18" / 30 mm      2.36" / 60 mm
   2nd:   0.98" / 25 mm   0.59" / 15 mm      1.97" / 50 mm
   3rd:   0.20" / 5 mm         -         0.59" / 15 mm
   4th:         -            -         0.59" / 15 mm

   - Armoured deck - single deck:
   For and Aft decks: 1.38" / 35 mm
   Forecastle: 0.00" / 0 mm  Quarter deck: 1.38" / 35 mm

Machinery:
   Oil fired boilers, steam turbines,
   Geared drive, 4 shafts, 110,000 shp / 82,060 Kw = 32.81 kts
   Range 11,000nm at 14.00 kts
   Bunker at max displacement = 2,663 tons

Complement:
   609 - 792

Cost:
   £3.775 million / $15.101 million

Distribution of weights at normal displacement:
   Armament: 601 tons, 4.6 %
      - Guns: 601 tons, 4.6 %
   Armour: 1,780 tons, 13.7 %
      - Belts: 900 tons, 6.9 %
      - Armament: 236 tons, 1.8 %
      - Armour Deck: 644 tons, 4.9 %
   Machinery: 3,521 tons, 27.0 %
   Hull, fittings & equipment: 4,588 tons, 35.2 %
   Fuel, ammunition & stores: 1,930 tons, 14.8 %
   Miscellaneous weights: 610 tons, 4.7 %
      - Hull below water: 100 tons
      - Hull above water: 150 tons
      - On freeboard deck: 335 tons
      - Above deck: 25 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     15,589 lbs / 7,071 Kg = 87.6 x 7.1 " / 180 mm shells or 1.6 torpedoes
   Stability (Unstable if below 1.00): 1.23
   Metacentric height 3.7 ft / 1.1 m
   Roll period: 13.9 seconds
   Steadiness   - As gun platform (Average = 50 %): 50 %
         - Recoil effect (Restricted arc if above 1.00): 0.40
   Seaboat quality  (Average = 1.00): 1.22

Hull form characteristics:
   Hull has rise forward of midbreak,
     a normal bow and a round stern
   Block coefficient (normal/deep): 0.536 / 0.546
   Length to Beam Ratio: 9.74 : 1
   'Natural speed' for length: 24.97 kts
   Power going to wave formation at top speed: 58 %
   Trim (Max stability = 0, Max steadiness = 100): 41
   Bow angle (Positive = bow angles forward): 20.00 degrees
   Stern overhang: 6.56 ft / 2.00 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
      - Forecastle:   20.00 %,  27.07 ft / 8.25 m,  25.43 ft / 7.75 m
      - Forward deck:   50.00 %,  25.43 ft / 7.75 m,  25.43 ft / 7.75 m
      - Aft deck:   18.34 %,  16.40 ft / 5.00 m,  16.40 ft / 5.00 m
      - Quarter deck:   11.66 %,  16.40 ft / 5.00 m,  16.40 ft / 5.00 m
      - Average freeboard:      22.85 ft / 6.96 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 105.1 %
      - Above water (accommodation/working, high = better): 197.7 %
   Waterplane Area: 27,480 Square feet or 2,553 Square metres
   Displacement factor (Displacement / loading): 114 %
   Structure weight / hull surface area: 108 lbs/sq ft or 529 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.95
      - Longitudinal: 1.63
      - Overall: 1.00
   Adequate machinery, storage, compartmentation space
   Excellent accommodation and workspace room
   Good seaboat, rides out heavy weather easily

Misc Weight Distribution
-Below Water (80t)
--30t Additional Pumps
--30t Additional Damage Control Equipment
--20t Additional Aviation consumable stores
--10t Improved Food & Drink storage
-Above Water (100t)
--30t Additional Damage Control Equipment
--20t Enhanced Ventilation and Crew Comfort
--50t Long Range Wireless (2x)
--50t Aviation Support Facilites (eg pilots ready room, hanger ventilation)
-On Deck (170t)
--50t 1918 Fire Control
--50t Reserved for Future Aviation Facilities (2x Recon Plane & 2x Catapults)
--32t 8x530mm (1913) Torpedo Tubes (2x4 mounts Aft Deck Forward)
--25t Enhanced Ventilation and Crew Comfort
--10t Short Range Wireless
--150t  Six Armed Floatplanes
--15t 3x Catapults (one on each side aft deck, one on fantail)
--3t Construction Reserve
-Above Deck (25t)
--10t Additional Optical Spotting Equipment
--10t Night Fighting Equipment
--5t Improved Signaling Equipment

[Kaiser Kirk]

Question - on both the AC and the Cruiser, you have fairly shallow hulls.
Is there a storyline reason?

Now I tend to try for some ships under 7.5m, but others I keep to 9.5m
The storyline reasons are my Dutch navy in Wesworld where  Soerabaja harbor was mostly 7.5m, and the OTL USN had
that depth as a limiter for a bit for operations off Mexico...So in my mind 7.5m becomes a proxy for 'shallow water' ports.
Which has little relevance to Navalism.

BUT...if there isn't a particular reason.... I think you could bring down hull resistance and increase hull girder depth by making them deeper,
dropping BC and saving weight. You'd probably boost seakeeping as well as the BC drops, and so be able to trim freeboard. 

[snip]

The big sticks for the 1926 Plan, an updated Empress Amelia. Major changes are a refresh of the AA battery to newer weapons, moving the 140mm secondaries to twin M&H from casemates, and thicker deck armor. A very minor increase to the TDS depth is also there.

LBS-26, Imperial Roman Republic Fast Battleship laid down 1926

Displacement:
   46,074 t light; 48,395 t standard; 51,006 t normal; 53,095 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (869.41 ft / 853.02 ft) x 104.99 ft x (31.17 / 32.24 ft)
   (265.00 m / 260.00 m) x 32.00 m  x (9.50 / 9.83 m)

Armament:
      8 - 16.14" / 410 mm 45.0 cal guns - 2,120.84lbs / 962.00kg shells, 110 per gun
     Breech loading guns in turret on barbette mounts, 1915 Model
     4 x 2-gun mounts on centreline ends, evenly spread
      2 raised mounts - superfiring
      20 - 5.51" / 140 mm 55.0 cal guns - 85.98lbs / 39.00kg shells, 200 per gun
     Quick firing guns in deck and hoist mounts, 1909 Model
     10 x Single mounts on sides, evenly spread
      4 raised mounts
      8 - 3.54" / 90.0 mm 50.0 cal guns - 20.94lbs / 9.50kg shells, 250 per gun
     Anti-air guns in deck and hoist mounts, 1926 Model
     8 x Single mounts on sides, evenly spread
      8 raised mounts
      24 - 1.10" / 28.0 mm 55.0 cal guns - 0.72lbs / 0.33kg shells, 5,000 per gun
     Anti-air guns in deck and hoist mounts, 1926 Model
     6 x Quad mounts on sides, evenly spread
      6 raised mounts
      10 - 0.30" / 7.5 mm 66.7 cal guns - 0.01lbs / 0.01kg shells, 15,000 per gun
     Machine guns in deck mounts, 1925 Model
     10 x Single mounts on sides, evenly spread
      10 raised mounts
      Weight of broadside 18,871 lbs / 8,560 kg

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   13.4" / 340 mm   513.35 ft / 156.47 m   18.68 ft / 5.69 m
   Ends:   1.97" / 50 mm   339.67 ft / 103.53 m   13.12 ft / 4.00 m
     Main Belt covers 93 % of normal length
     Main Belt inclined 15.00 degrees (positive = in)

   - Torpedo Bulkhead - Additional damage containing bulkheads:
      2.56" / 65 mm   513.35 ft / 156.47 m   34.45 ft / 10.50 m
   Beam between torpedo bulkheads 84.32 ft / 25.70 m

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   17.3" / 440 mm   7.09" / 180 mm      11.8" / 300 mm
   2nd:   1.97" / 50 mm   0.59" / 15 mm      3.94" / 100 mm
   3rd:   0.20" / 5 mm         -         0.98" / 25 mm
   4th:         -            -         0.59" / 15 mm
   5th:   0.20" / 5 mm         -               -

   - Armoured deck - multiple decks:
   For and Aft decks: 4.53" / 115 mm
   Forecastle: 1.38" / 35 mm  Quarter deck: 1.38" / 35 mm

   - Conning towers: Forward 13.39" / 340 mm, Aft 0.00" / 0 mm

Machinery:
   Oil fired boilers, steam turbines,
   Electric motors, 4 shafts, 180,000 shp / 134,280 Kw = 30.46 kts
   Range 8,000nm at 14.00 kts
   Bunker at max displacement = 4,700 tons

Complement:
   1,696 - 2,206

Cost:
   £14.627 million / $58.509 million

Distribution of weights at normal displacement:
   Armament: 4,001 tons, 7.8 %
      - Guns: 4,001 tons, 7.8 %
   Armour: 16,071 tons, 31.5 %
      - Belts: 5,852 tons, 11.5 %
      - Torpedo bulkhead: 1,674 tons, 3.3 %
      - Armament: 3,315 tons, 6.5 %
      - Armour Deck: 4,833 tons, 9.5 %
      - Conning Tower: 397 tons, 0.8 %
   Machinery: 5,762 tons, 11.3 %
   Hull, fittings & equipment: 17,316 tons, 33.9 %
   Fuel, ammunition & stores: 4,932 tons, 9.7 %
   Miscellaneous weights: 2,925 tons, 5.7 %
      - Hull below water: 1,900 tons
      - Hull above water: 250 tons
      - On freeboard deck: 675 tons
      - Above deck: 100 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     70,998 lbs / 32,204 Kg = 33.8 x 16.1 " / 410 mm shells or 10.2 torpedoes
   Stability (Unstable if below 1.00): 1.16
   Metacentric height 7.1 ft / 2.2 m
   Roll period: 16.5 seconds
   Steadiness   - As gun platform (Average = 50 %): 49 %
         - Recoil effect (Restricted arc if above 1.00): 0.68
   Seaboat quality  (Average = 1.00): 1.07

Hull form characteristics:
   Hull has rise forward of midbreak,
     a normal bow and a round stern
   Block coefficient (normal/deep): 0.640 / 0.644
   Length to Beam Ratio: 8.13 : 1
   'Natural speed' for length: 29.21 kts
   Power going to wave formation at top speed: 51 %
   Trim (Max stability = 0, Max steadiness = 100): 45
   Bow angle (Positive = bow angles forward): 20.00 degrees
   Stern overhang: 5.64 ft / 1.72 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
      - Forecastle:   20.82 %,  29.53 ft / 9.00 m,  27.07 ft / 8.25 m
      - Forward deck:   40.00 %,  27.07 ft / 8.25 m,  27.07 ft / 8.25 m
      - Aft deck:   20.18 %,  18.04 ft / 5.50 m,  18.04 ft / 5.50 m
      - Quarter deck:   19.00 %,  18.04 ft / 5.50 m,  18.04 ft / 5.50 m
      - Average freeboard:      23.74 ft / 7.24 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 92.4 %
      - Above water (accommodation/working, high = better): 183.5 %
   Waterplane Area: 67,950 Square feet or 6,313 Square metres
   Displacement factor (Displacement / loading): 107 %
   Structure weight / hull surface area: 203 lbs/sq ft or 993 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 1.00
      - Longitudinal: 1.02
      - Overall: 1.00
   Adequate machinery, storage, compartmentation space
   Excellent accommodation and workspace room
Misc Weight Distribution
-Below Water (1900t)
--1445t Electric Drives
--200t Additional Pumps
--200t Additional Damage Control Equipment
--50t Improved Food & Drink storage
-Above Water (250t)
--40t Improved Officer Accommodations
--40t Improved Crew Accommodations
--70t Additional Damage Control Equipment
--20t Enhanced Ventilation and Crew Comfort
--50t Long Range Wireless (2x)
--30t Construction Reserve
-On Deck (675t)
--375t 1918 Fire Control
--50t Reserved for Future Aviation Facilities (2x Recon Plane & 2x Catapults)
--50t Flag Facilities
--50t Enhanced Ventilation and Crew Comfort
--80t Power Assist for Caesemate guns
--10t Short Range Wireless
--35t Construction Reserve
-Above Deck (100t)
--15t Additional Optical Spotting Equipment
--70t Night Fighting Equipment
--15t Improved Signaling Equipment

[snip]

Question - on both the AC and the Cruiser, you have fairly shallow hulls.
Is there a storyline reason?

Now I tend to try for some ships under 7.5m, but others I keep to 9.5m
The storyline reasons are my Dutch navy in Wesworld where  Soerabaja harbor was mostly 7.5m, and the OTL USN had
that depth as a limiter for a bit for operations off Mexico...So in my mind 7.5m becomes a proxy for 'shallow water' ports.
Which has little relevance to Navalism.

BUT...if there isn't a particular reason.... I think you could bring down hull resistance and increase hull girder depth by making them deeper,
dropping BC and saving weight. You'd probably boost seakeeping as well as the BC drops, and so be able to trim freeboard.

Mostly this results from the OTL designs these ships are initially derived from. At least as far as cruisers go, I do have some reasonably shallow water to work in with respect to the Texas coast and the Amazon delta, so having the draft of non-capital ships be kept limited where possible increases possible options.

[Jefgte]

Mostly this results from the OTL designs these ships are initially derived from. At least as far as cruisers go, I do have some reasonably shallow water to work in with respect to the Texas coast and the Amazon delta, so having the draft of non-capital ships be kept limited where possible increases possible options.

Byzantium also tries to limit the draft of its colonial ships.
The seabed in these coasts is not well known.

[Kaiser Kirk]

Byzantium also tries to limit the draft of its colonial ships.
The seabed in these coasts is not well known.

One thing I vaguely wish we could go back and change is to add a couple 'depth' shades to the map,
one for over 30m and over 100m deep, to guide mine and sub matters,
the other for max draft of ~7.5m.  Oh, and 'secondary' ports with a 7.5m cap - for more littoral considerations.
However it would be a terrific amount of work at this stage, for a limited gain.

Right now, I spend a fair amount of time using Google maps for near-port depths, but that is
both time consumptive and of questionable accuracy.  Plus no one knows until the war happens,
which is less useful for planning.