Imperial Roman Navy: 1910-1914 Designs

[snip]

New ships go here.

[snip]

An improvement on the preceding E-Class, the F-Class Destroyer is built to the same basic design. It trades the E-Class's limited torpedo reloads for a more powerful 530mm weapon. It is also slightly faster. This class also marks the first time that new construction is being officially deemed replacements in recent history. 20 of these ships are planned to replace all the non-turbine engined Destroyers (A and B Class). It is expected to take until about mid-1912 to complete the program.

F-Class, Imperial Roman Republic Destroyer laid down 1910

Displacement:
   1,000 t light; 1,036 t standard; 1,107 t normal; 1,164 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (285.43 ft / 278.87 ft) x 29.53 ft x (11.48 / 11.88 ft)
   (87.00 m / 85.00 m) x 9.00 m  x (3.50 / 3.62 m)

Armament:
      4 - 3.94" / 100 mm 45.0 cal guns - 30.77lbs / 13.96kg shells, 175 per gun
     Quick firing guns in deck mounts, 1906 Model
     2 x Single mounts on centreline ends, evenly spread
      1 raised mount aft - superfiring
     2 x Single mounts on sides, forward deck centre
      4 - 1.77" / 45.0 mm 50.0 cal guns - 2.94lbs / 1.34kg shells, 250 per gun
     Quick firing guns in deck mounts, 1905 Model
     4 x Single mounts on sides, evenly spread
      4 - 0.26" / 6.5 mm 60.0 cal guns - 0.01lbs / 0.00kg shells, 1,500 per gun
     Machine guns in deck mounts, 1910 Model
     4 x Single mounts on sides, evenly spread
      4 raised mounts
      Weight of broadside 135 lbs / 61 kg

Armour:
   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   0.98" / 25 mm         -               -
   2nd:   0.59" / 15 mm         -               -
   3rd:   0.59" / 15 mm         -               -

Machinery:
   Oil fired boilers, steam turbines,
   Direct drive, 2 shafts, 26,000 shp / 19,396 Kw = 30.95 kts
   Range 3,000nm at 10.00 kts
   Bunker at max displacement = 129 tons

Complement:
   95 - 124

Cost:
   £0.127 million / $0.507 million

Distribution of weights at normal displacement:
   Armament: 25 tons, 2.3 %
      - Guns: 25 tons, 2.3 %
   Armour: 23 tons, 2.0 %
      - Armament: 23 tons, 2.0 %
   Machinery: 608 tons, 54.9 %
   Hull, fittings & equipment: 279 tons, 25.2 %
   Fuel, ammunition & stores: 107 tons, 9.7 %
   Miscellaneous weights: 65 tons, 5.9 %
      - On freeboard deck: 65 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     288 lbs / 131 Kg = 9.5 x 3.9 " / 100 mm shells or 0.2 torpedoes
   Stability (Unstable if below 1.00): 1.29
   Metacentric height 1.3 ft / 0.4 m
   Roll period: 11.0 seconds
   Steadiness   - As gun platform (Average = 50 %): 50 %
         - Recoil effect (Restricted arc if above 1.00): 0.19
   Seaboat quality  (Average = 1.00): 0.85

Hull form characteristics:
   Hull has rise forward of midbreak,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0.410 / 0.417
   Length to Beam Ratio: 9.44 : 1
   'Natural speed' for length: 16.70 kts
   Power going to wave formation at top speed: 70 %
   Trim (Max stability = 0, Max steadiness = 100): 59
   Bow angle (Positive = bow angles forward): 20.00 degrees
   Stern overhang: 0.89 ft / 0.27 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
      - Forecastle:   20.00 %,  15.58 ft / 4.75 m,  15.58 ft / 4.75 m
      - Forward deck:   45.00 %,  15.58 ft / 4.75 m,  15.58 ft / 4.75 m
      - Aft deck:   20.00 %,  6.56 ft / 2.00 m,  6.56 ft / 2.00 m
      - Quarter deck:   15.00 %,  6.56 ft / 2.00 m,  6.56 ft / 2.00 m
      - Average freeboard:      12.43 ft / 3.79 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 183.6 %
      - Above water (accommodation/working, high = better): 130.9 %
   Waterplane Area: 5,099 Square feet or 474 Square metres
   Displacement factor (Displacement / loading): 48 %
   Structure weight / hull surface area: 29 lbs/sq ft or 143 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.50
      - Longitudinal: 2.12
      - Overall: 0.58
   Cramped machinery, storage, compartmentation space
   Excellent accommodation and workspace room
   Poor seaboat, wet and uncomfortable, reduced performance in heavy weather

Misc Distribution
--On Deck (65t)
----36t 12x530mm Torpedos [Two triple tube mounts per side]
----4t Improved torpedo reload equipment.
----10t Short-Range Wireless
----5t Improved spray protections for Torpedo tubes
----5t Minesweeping Paravanes
----5t Construction Reserve.

[snip]

When the full details of the Norse Wicklow class battlecruisers came to light, the Roman Admiralty realised they had no ships capable of contesting them. On completion, the two new ships along with the Selkirkshire Class would give the Norse a uncounterable advantage in scouting. While the limitations imposed by the length of facilities available would mean a delay in starting construction, it did mean the ships would be considered very large. The first design took full advantage of this length. This resulted in protection that was less than ideal.

1910 Design A, Imperial Roman Republic Battlecruiser laid down 1910

Displacement:
   28,209 t light; 29,630 t standard; 31,000 t normal; 32,096 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (797.24 ft / 787.40 ft) x 90.22 ft x (26.25 / 27.00 ft)
   (243.00 m / 240.00 m) x 27.50 m  x (8.00 / 8.23 m)

Armament:
      9 - 13.39" / 340 mm 45.0 cal guns - 1,212.54lbs / 550.00kg shells, 110 per gun
     Breech loading guns in turret on barbette mounts, 1909 Model
     3 x 3-gun mounts on centreline ends, majority forward
      16 - 5.51" / 140 mm 55.0 cal guns - 85.98lbs / 39.00kg shells, 175 per gun
     Quick firing guns in casemate mounts, 1909 Model
     16 x Single mounts on sides, evenly spread
      16 hull mounts in casemates- Limited use in heavy seas
      Weight of broadside 12,289 lbs / 5,574 kg

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   6.69" / 170 mm   511.81 ft / 156.00 m   18.04 ft / 5.50 m
   Ends:   1.97" / 50 mm   275.56 ft / 83.99 m   9.84 ft / 3.00 m
   Upper:   1.97" / 50 mm   511.81 ft / 156.00 m   9.02 ft / 2.75 m
     Main Belt covers 100 % of normal length

   - Torpedo Bulkhead - Additional damage containing bulkheads:
      1.18" / 30 mm   511.81 ft / 156.00 m   23.46 ft / 7.15 m
   Beam between torpedo bulkheads 83.66 ft / 25.50 m

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   13.4" / 340 mm   7.09" / 180 mm      11.0" / 280 mm
   2nd:   1.97" / 50 mm   0.98" / 25 mm      1.97" / 50 mm

   - Armoured deck - single deck:
   For and Aft decks: 1.97" / 50 mm
   Forecastle: 0.59" / 15 mm  Quarter deck: 0.59" / 15 mm

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

Machinery:
   Oil fired boilers, steam turbines,
   Electric motors, 4 shafts, 110,000 shp / 82,060 Kw = 29.05 kts
   Range 7,000nm at 10.00 kts
   Bunker at max displacement = 2,466 tons

Complement:
   1,167 - 1,518

Cost:
   £2.723 million / $10.891 million

Distribution of weights at normal displacement:
   Armament: 2,602 tons, 8.4 %
      - Guns: 2,602 tons, 8.4 %
   Armour: 7,321 tons, 23.6 %
      - Belts: 3,163 tons, 10.2 %
      - Torpedo bulkhead: 525 tons, 1.7 %
      - Armament: 1,793 tons, 5.8 %
      - Armour Deck: 1,631 tons, 5.3 %
      - Conning Tower: 209 tons, 0.7 %
   Machinery: 4,545 tons, 14.7 %
   Hull, fittings & equipment: 11,951 tons, 38.6 %
   Fuel, ammunition & stores: 2,791 tons, 9.0 %
   Miscellaneous weights: 1,790 tons, 5.8 %
      - Hull below water: 1,200 tons
      - Hull above water: 100 tons
      - On freeboard deck: 450 tons
      - Above deck: 40 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     39,066 lbs / 17,720 Kg = 32.6 x 13.4 " / 340 mm shells or 4.9 torpedoes
   Stability (Unstable if below 1.00): 1.28
   Metacentric height 6.7 ft / 2.0 m
   Roll period: 14.6 seconds
   Steadiness   - As gun platform (Average = 50 %): 50 %
         - Recoil effect (Restricted arc if above 1.00): 0.46
   Seaboat quality  (Average = 1.00): 1.03

Hull form characteristics:
   Hull has low quarterdeck ,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0.582 / 0.586
   Length to Beam Ratio: 8.73 : 1
   'Natural speed' for length: 28.06 kts
   Power going to wave formation at top speed: 48 %
   Trim (Max stability = 0, Max steadiness = 100): 48
   Bow angle (Positive = bow angles forward): 20.00 degrees
   Stern overhang: 3.18 ft / 0.97 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
      - Forecastle:   20.00 %,  18.27 ft / 5.57 m,  18.86 ft / 5.75 m
      - Forward deck:   30.00 %,  18.86 ft / 5.75 m,  18.86 ft / 5.75 m
      - Aft deck:   35.00 %,  18.86 ft / 5.75 m,  18.86 ft / 5.75 m
      - Quarter deck:   15.00 %,  9.84 ft / 3.00 m,  9.84 ft / 3.00 m
      - Average freeboard:      17.46 ft / 5.32 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 91.5 %
      - Above water (accommodation/working, high = better): 157.3 %
   Waterplane Area: 51,085 Square feet or 4,746 Square metres
   Displacement factor (Displacement / loading): 108 %
   Structure weight / hull surface area: 191 lbs/sq ft or 934 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 1.17
      - Longitudinal: 0.95
      - Overall: 1.00
   Adequate machinery, storage, compartmentation space
   Excellent accommodation and workspace room

[snip]

The second design boasts increased thickness for the main belt, as it is 20m shorter. It is otherwise identical.

1910 Design B, Imperial Roman Republic Battlecruiser laid down 1910

Displacement:
   25,783 t light; 27,152 t standard; 28,422 t normal; 29,438 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (731.64 ft / 721.78 ft) x 90.22 ft x (26.25 / 27.01 ft)
   (223.00 m / 220.00 m) x 27.50 m  x (8.00 / 8.23 m)

Armament:
      9 - 13.39" / 340 mm 45.0 cal guns - 1,212.54lbs / 550.00kg shells, 110 per gun
     Breech loading guns in turret on barbette mounts, 1909 Model
     3 x 3-gun mounts on centreline ends, majority forward
      16 - 5.51" / 140 mm 55.0 cal guns - 85.98lbs / 39.00kg shells, 175 per gun
     Quick firing guns in casemate mounts, 1909 Model
     16 x Single mounts on sides, evenly spread
      16 hull mounts in casemates- Limited use in heavy seas
      Weight of broadside 12,289 lbs / 5,574 kg

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   7.87" / 200 mm   469.16 ft / 143.00 m   18.04 ft / 5.50 m
   Ends:   1.97" / 50 mm   252.59 ft / 76.99 m   9.84 ft / 3.00 m
   Upper:   1.97" / 50 mm   469.16 ft / 143.00 m   9.02 ft / 2.75 m
     Main Belt covers 100 % of normal length

   - Torpedo Bulkhead - Additional damage containing bulkheads:
      1.18" / 30 mm   469.16 ft / 143.00 m   24.54 ft / 7.48 m
   Beam between torpedo bulkheads 83.66 ft / 25.50 m

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   13.4" / 340 mm   7.09" / 180 mm      11.0" / 280 mm
   2nd:   1.97" / 50 mm   0.98" / 25 mm      1.97" / 50 mm

   - Armoured deck - single deck:
   For and Aft decks: 1.97" / 50 mm
   Forecastle: 0.59" / 15 mm  Quarter deck: 0.59" / 15 mm

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

Machinery:
   Oil fired boilers, steam turbines,
   Electric motors, 4 shafts, 110,000 shp / 82,060 Kw = 29.16 kts
   Range 7,000nm at 10.00 kts
   Bunker at max displacement = 2,287 tons

Complement:
   1,093 - 1,422

Cost:
   £2.638 million / $10.552 million

Distribution of weights at normal displacement:
   Armament: 2,602 tons, 9.2 %
      - Guns: 2,602 tons, 9.2 %
   Armour: 7,342 tons, 25.8 %
      - Belts: 3,353 tons, 11.8 %
      - Torpedo bulkhead: 503 tons, 1.8 %
      - Armament: 1,793 tons, 6.3 %
      - Armour Deck: 1,495 tons, 5.3 %
      - Conning Tower: 197 tons, 0.7 %
   Machinery: 4,545 tons, 16.0 %
   Hull, fittings & equipment: 9,504 tons, 33.4 %
   Fuel, ammunition & stores: 2,639 tons, 9.3 %
   Miscellaneous weights: 1,790 tons, 6.3 %
      - Hull below water: 1,200 tons
      - Hull above water: 100 tons
      - On freeboard deck: 450 tons
      - Above deck: 40 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     32,907 lbs / 14,926 Kg = 27.4 x 13.4 " / 340 mm shells or 4.2 torpedoes
   Stability (Unstable if below 1.00): 1.28
   Metacentric height 6.7 ft / 2.0 m
   Roll period: 14.6 seconds
   Steadiness   - As gun platform (Average = 50 %): 50 %
         - Recoil effect (Restricted arc if above 1.00): 0.48
   Seaboat quality  (Average = 1.00): 1.03

Hull form characteristics:
   Hull has a flush deck,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0.582 / 0.586
   Length to Beam Ratio: 8.00 : 1
   'Natural speed' for length: 26.87 kts
   Power going to wave formation at top speed: 52 %
   Trim (Max stability = 0, Max steadiness = 100): 48
   Bow angle (Positive = bow angles forward): 20.00 degrees
   Stern overhang: 2.40 ft / 0.73 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
      - Forecastle:   20.00 %,  20.51 ft / 6.25 m,  18.86 ft / 5.75 m
      - Forward deck:   30.00 %,  18.86 ft / 5.75 m,  18.86 ft / 5.75 m
      - Aft deck:   35.00 %,  18.86 ft / 5.75 m,  18.86 ft / 5.75 m
      - Quarter deck:   15.00 %,  18.86 ft / 5.75 m,  18.86 ft / 5.75 m
      - Average freeboard:      19.00 ft / 5.79 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 99.6 %
      - Above water (accommodation/working, high = better): 154.0 %
   Waterplane Area: 46,833 Square feet or 4,351 Square metres
   Displacement factor (Displacement / loading): 99 %
   Structure weight / hull surface area: 168 lbs/sq ft or 818 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 1.00
      - Longitudinal: 1.05
      - Overall: 1.00
   Adequate machinery, storage, compartmentation space
   Excellent accommodation and workspace room

A second version of this design with lighter, but less efficient, direct drive turbines was also produced. The weight savings again went to armor protection.

1910 Design C, Imperial Roman Republic Battlecruiser laid down 1910

Displacement:
   25,783 t light; 27,152 t standard; 28,422 t normal; 29,438 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (731.64 ft / 721.78 ft) x 90.22 ft x (26.25 / 27.01 ft)
   (223.00 m / 220.00 m) x 27.50 m  x (8.00 / 8.23 m)

Armament:
      9 - 13.39" / 340 mm 45.0 cal guns - 1,212.54lbs / 550.00kg shells, 110 per gun
     Breech loading guns in turret on barbette mounts, 1909 Model
     3 x 3-gun mounts on centreline ends, majority forward
      16 - 5.51" / 140 mm 55.0 cal guns - 85.98lbs / 39.00kg shells, 175 per gun
     Quick firing guns in casemate mounts, 1909 Model
     16 x Single mounts on sides, evenly spread
      16 hull mounts in casemates- Limited use in heavy seas
      Weight of broadside 12,289 lbs / 5,574 kg

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   9.84" / 250 mm   469.16 ft / 143.00 m   18.04 ft / 5.50 m
   Ends:   1.97" / 50 mm   252.59 ft / 76.99 m   9.84 ft / 3.00 m
   Upper:   1.97" / 50 mm   469.16 ft / 143.00 m   9.02 ft / 2.75 m
     Main Belt covers 100 % of normal length

   - Torpedo Bulkhead - Additional damage containing bulkheads:
      1.18" / 30 mm   469.16 ft / 143.00 m   24.54 ft / 7.48 m
   Beam between torpedo bulkheads 83.66 ft / 25.50 m

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   13.4" / 340 mm   7.09" / 180 mm      11.0" / 280 mm
   2nd:   1.97" / 50 mm   0.98" / 25 mm      1.97" / 50 mm

   - Armoured deck - single deck:
   For and Aft decks: 2.36" / 60 mm
   Forecastle: 0.59" / 15 mm  Quarter deck: 0.59" / 15 mm

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

Machinery:
   Oil fired boilers, steam turbines,
   Direct drive, 4 shafts, 110,000 shp / 82,060 Kw = 29.16 kts
   Range 7,000nm at 10.00 kts
   Bunker at max displacement = 2,287 tons

Complement:
   1,093 - 1,422

Cost:
   £2.638 million / $10.552 million

Distribution of weights at normal displacement:
   Armament: 2,602 tons, 9.2 %
      - Guns: 2,602 tons, 9.2 %
   Armour: 8,326 tons, 29.3 %
      - Belts: 4,057 tons, 14.3 %
      - Torpedo bulkhead: 503 tons, 1.8 %
      - Armament: 1,793 tons, 6.3 %
      - Armour Deck: 1,775 tons, 6.2 %
      - Conning Tower: 197 tons, 0.7 %
   Machinery: 4,545 tons, 16.0 %
   Hull, fittings & equipment: 9,520 tons, 33.5 %
   Fuel, ammunition & stores: 2,639 tons, 9.3 %
   Miscellaneous weights: 790 tons, 2.8 %
      - Hull below water: 200 tons
      - Hull above water: 100 tons
      - On freeboard deck: 450 tons
      - Above deck: 40 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     34,033 lbs / 15,437 Kg = 28.4 x 13.4 " / 340 mm shells or 4.4 torpedoes
   Stability (Unstable if below 1.00): 1.26
   Metacentric height 6.5 ft / 2.0 m
   Roll period: 14.8 seconds
   Steadiness   - As gun platform (Average = 50 %): 50 %
         - Recoil effect (Restricted arc if above 1.00): 0.48
   Seaboat quality  (Average = 1.00): 1.03

Hull form characteristics:
   Hull has a flush deck,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0.582 / 0.586
   Length to Beam Ratio: 8.00 : 1
   'Natural speed' for length: 26.87 kts
   Power going to wave formation at top speed: 52 %
   Trim (Max stability = 0, Max steadiness = 100): 48
   Bow angle (Positive = bow angles forward): 20.00 degrees
   Stern overhang: 2.40 ft / 0.73 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
      - Forecastle:   20.00 %,  20.51 ft / 6.25 m,  18.86 ft / 5.75 m
      - Forward deck:   30.00 %,  18.86 ft / 5.75 m,  18.86 ft / 5.75 m
      - Aft deck:   35.00 %,  18.86 ft / 5.75 m,  18.86 ft / 5.75 m
      - Quarter deck:   15.00 %,  18.86 ft / 5.75 m,  18.86 ft / 5.75 m
      - Average freeboard:      19.00 ft / 5.79 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 95.6 %
      - Above water (accommodation/working, high = better): 154.0 %
   Waterplane Area: 46,833 Square feet or 4,351 Square metres
   Displacement factor (Displacement / loading): 99 %
   Structure weight / hull surface area: 168 lbs/sq ft or 819 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 1.00
      - Longitudinal: 1.06
      - Overall: 1.00
   Adequate machinery, storage, compartmentation space
   Excellent accommodation and workspace room

These two designs were softly combined, with a reduction in bunkerage on Design B to take advantage of the increase in efficiency and give it similar range to Design C. While not as well protected, it maintains the other advantages of Electric drives.

1910 Design D, Imperial Roman Republic Battlecruiser laid down 1910

Displacement:
   25,928 t light; 27,297 t standard; 28,422 t normal; 29,322 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (731.64 ft / 721.78 ft) x 90.22 ft x (26.25 / 26.92 ft)
   (223.00 m / 220.00 m) x 27.50 m  x (8.00 / 8.21 m)

Armament:
      9 - 13.39" / 340 mm 45.0 cal guns - 1,212.54lbs / 550.00kg shells, 110 per gun
     Breech loading guns in turret on barbette mounts, 1909 Model
     3 x 3-gun mounts on centreline ends, majority forward
      16 - 5.51" / 140 mm 55.0 cal guns - 85.98lbs / 39.00kg shells, 175 per gun
     Quick firing guns in casemate mounts, 1909 Model
     16 x Single mounts on sides, evenly spread
      16 hull mounts in casemates- Limited use in heavy seas
      Weight of broadside 12,289 lbs / 5,574 kg

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   8.46" / 215 mm   469.16 ft / 143.00 m   18.04 ft / 5.50 m
   Ends:   1.97" / 50 mm   252.59 ft / 76.99 m   9.84 ft / 3.00 m
   Upper:   1.97" / 50 mm   469.16 ft / 143.00 m   9.02 ft / 2.75 m
     Main Belt covers 100 % of normal length

   - Torpedo Bulkhead - Additional damage containing bulkheads:
      1.18" / 30 mm   469.16 ft / 143.00 m   24.54 ft / 7.48 m
   Beam between torpedo bulkheads 83.66 ft / 25.50 m

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   13.4" / 340 mm   7.09" / 180 mm      11.0" / 280 mm
   2nd:   1.97" / 50 mm   0.98" / 25 mm      1.97" / 50 mm

   - Armoured deck - single deck:
   For and Aft decks: 1.97" / 50 mm
   Forecastle: 0.59" / 15 mm  Quarter deck: 0.59" / 15 mm

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

Machinery:
   Oil fired boilers, steam turbines,
   Electric motors, 4 shafts, 110,000 shp / 82,060 Kw = 29.16 kts
   Range 6,100nm at 10.00 kts
   Bunker at max displacement = 2,025 tons

Complement:
   1,093 - 1,422

Cost:
   £2.643 million / $10.572 million

Distribution of weights at normal displacement:
   Armament: 2,602 tons, 9.2 %
      - Guns: 2,602 tons, 9.2 %
   Armour: 7,553 tons, 26.6 %
      - Belts: 3,564 tons, 12.5 %
      - Torpedo bulkhead: 503 tons, 1.8 %
      - Armament: 1,793 tons, 6.3 %
      - Armour Deck: 1,495 tons, 5.3 %
      - Conning Tower: 197 tons, 0.7 %
   Machinery: 4,545 tons, 16.0 %
   Hull, fittings & equipment: 9,438 tons, 33.2 %
   Fuel, ammunition & stores: 2,494 tons, 8.8 %
   Miscellaneous weights: 1,790 tons, 6.3 %
      - Hull below water: 1,200 tons
      - Hull above water: 100 tons
      - On freeboard deck: 450 tons
      - Above deck: 40 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     32,723 lbs / 14,843 Kg = 27.3 x 13.4 " / 340 mm shells or 4.2 torpedoes
   Stability (Unstable if below 1.00): 1.28
   Metacentric height 6.7 ft / 2.0 m
   Roll period: 14.7 seconds
   Steadiness   - As gun platform (Average = 50 %): 50 %
         - Recoil effect (Restricted arc if above 1.00): 0.48
   Seaboat quality  (Average = 1.00): 1.03

Hull form characteristics:
   Hull has a flush deck,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0.582 / 0.585
   Length to Beam Ratio: 8.00 : 1
   'Natural speed' for length: 26.87 kts
   Power going to wave formation at top speed: 52 %
   Trim (Max stability = 0, Max steadiness = 100): 48
   Bow angle (Positive = bow angles forward): 20.00 degrees
   Stern overhang: 2.40 ft / 0.73 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
      - Forecastle:   20.00 %,  20.51 ft / 6.25 m,  18.86 ft / 5.75 m
      - Forward deck:   30.00 %,  18.86 ft / 5.75 m,  18.86 ft / 5.75 m
      - Aft deck:   35.00 %,  18.86 ft / 5.75 m,  18.86 ft / 5.75 m
      - Quarter deck:   15.00 %,  18.86 ft / 5.75 m,  18.86 ft / 5.75 m
      - Average freeboard:      19.00 ft / 5.79 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 99.6 %
      - Above water (accommodation/working, high = better): 154.0 %
   Waterplane Area: 46,833 Square feet or 4,351 Square metres
   Displacement factor (Displacement / loading): 98 %
   Structure weight / hull surface area: 167 lbs/sq ft or 813 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.99
      - Longitudinal: 1.04
      - Overall: 1.00
   Adequate machinery, storage, compartmentation space
   Excellent accommodation and workspace room

[Kaiser Kirk]

Interesting set of Battlecruiser designs.
I really haven't been able to keep up with other nation's vessels except here and there.
Worse, I was one of the first to post, so I suspect there may be replies to my vessels....but I don't have replies to those replies !

The Wicklow are a 1909 class, so these are 1910 reaction.... that's always a hard one to roleplay.

They seem pretty solid ships for the task.
I like that you're sticking to Electric drive, it's on my "to do" list, primarily as a Torpedo survival measure, but I haven't gotten there yet, having gone Nets-> Nets+standoff bulge -> TDS ->layered TDS....then Electric.

Speaking of which, your depth of TDS system suggests only 1m of standoff from the hull, which is even less than the Wicklow's 1.5m.

You invest quite heavily in tall belts, and with the high speeds of these vessels that may be reasonable, but a little thicker might be better if  your goal to engage the Wicklow's in combat with these.  Right now neither has the belt armor to take on the other at any combat range, but (ok this, like much of what I babble on about,  is based on scattered readings over the years) I don't think your 50mm decks are not proof against splinters from large caliber shells such as the Wicklow has. The 60mm is far more reasonable. 

Upper belts - I made comment to Jefgte about this - 50mm is nothing more than HE or splinter armor, it's not really an upper belt.  From what I understand, they couldn't even make effective KC armor below 100mm (later 88-90mm)- it will never take a SAP or AP round. So I don't think it's appropriate until you have "All or Nothing" armor- that's the Tech that allows you to abandon proper upper belts. However, that tech can't be researched until 1910.

Also, if you're looking to engage the Norse, I presume offensive operations are part of the package, which means operating in the North Atlantic and North Sea, so perhaps a higher forecastle?

[snip]

Will hit a couple things, as you make some good points.

Re TDS: Ya, its narrow, but if I try and give it more space the belts need to be extended more. Doing that just breaks the design and I've yet to be able to unbreak it to my satisfaction. It might be something I can fix with some other modifications, more on that below.

Re Armor Layout: The current layout is a reflection of that the Navy is looking at these as being closer to battleships rather than cruisers. This is due in part to them sporting the same main guns as the battleline. I will probably try drumming up a revision or two of Design D with a more cruiser-like armor layout to improve the thickness of protection at the expense of protected volume. This will also touch on the 50mm plate concern, both for decks and belts.

Re Engagement: These are less intended to counter to the Wicklows and more to be peers. What the Wicklow represents to the Romans (this is without regard for Walter's intent on their use) is the ability to serve as a "Battle Scout" that is capable of both 1) Maintain contact with limited fear of retaliation and 2) Denigh the same capability to the hostile forces. Right now, the Roman Navy can for sure do the former between the fast cruisers and the new E and F class destroyers. What those ships lack is the capability to force hostile heavy scouts off (assuming we are talking single-ship action). By constructing similar ships, it ensures that the Wicklows or other future ships like them do not have the ability to scout the Roman battleline unmolested.

Regarding further development of the "battlecruiser" concept: What really hinders these ships is my lack of any gun between 210mm and 340mm. With a smaller weapon (eg a 280mm), it would be easier to get higher speeds (more to the Battlescout concept) or better protection (more in the direction of Fast Battleship). Of course it possible to make both these happen with more tonnage, but that is not spending I'm at liberty to make right now. There are two paths this could follow prior to the emergence of true Fast Battleships mostly obsoleting the battlecruiser's nich as Rome sees it.

1) The Wicklow and other ships like her are fewer in number. If this remains the case the 1910 ships will probably be the only examples of their kind for some time. A second class might be constructed near the middle-late of the decade to ensure continued competitiveness in the sub class. In this case, the battlescout role is likely to pass to a smaller and cheaper armored cruiser type. These would be armed with a intermediary gun, ether the existing 210mm, an more modern version, or something new. Capable of building multiple for the cost of one battlecruiser, what they cannot obtain in survivability they can make up for in the number of places they can be.

2) The Wicklow and the 1910 Battlecruiser are merely the first of a rapidly expanding class of warships. Here the 1910 ships would be the opening entry from the Imperial Navy into the Battlecruiser class. There would probably be a greater number of single ship classes or related sub-classes to keep abreast of technical developments while still providing for a strong battleline. In this case, there would likely exist little between the current size of cruisers (assuming there is no great development on that front for a time) and the capital ships. The priority would be ensuring there were enough supporting ships for the big capitals rather than pursuing any intermediary classes. With this path, the way would be clear to spend the necessary tonnage to make the 340mm guns (or a successor) work as the ships would clearly need to sport battleship weapons.

[Kaiser Kirk]

A) TDS: I was pointing to your beam between torpedo bulkheads setting at 25.5.
The overall beam I didn't bother looking at closely, though since they are triples, I should....
um, the twin 13.5" British ships - with no real TDS, were 27.1-27.6,
So with the triple 13.4", the breeches are going to be cramped.  My own rule of thumb is I try to remember to add at least 1-2m to account for the space the extra breech and room to work it takes.

B) Armor, the armor scheme* works very well if you're looking at killing Armored Cruisers, or maybe even 11-12" guns.  So if you're not thinking of engaging the Wicklows, it could be fine. If you are, the listing for the Orion-Class's 13.5" gun puts the expected armor penetration for an Uncapped AP shell at 10,000yards at 12.2 inches.  With 1910 artillery tech available, you're starting to think about capped shells, which will drive penetration up.  My belts are thicker because my shells are larger, and they aren't that high because I still use a protective deck scheme for a little bit more :)

*I still hold that "upper belts" under 90mm should wait for All-or-nothing

Parthia is going to look around and see these things floating in the North Sea and be very puzzled about what to do about them.  However, Jefgte will probably have to respond first.  That will dictate what I do with my Armored Cruiser/Battlecruiser designs.

[snip]

Designs E and F are slight variations on Design D, which is seen as the best to build off of. The beam is increased by 1m, displacement increased by 1000t. Both designs thicken the Upper Belt to 100mm and the main deck to 60mm. Design E keeps the same armor layout as the battleships while Design F trades height of the main belt for 40mm more protection and some minor increases in end deck, end belt, and casemate armor thickness.

1910 Design E, Imperial Roman Republic Battlecruiser laid down 1910

Displacement:
   26,882 t light; 28,272 t standard; 29,422 t normal; 30,342 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (731.64 ft / 721.78 ft) x 93.50 ft x (26.25 / 26.91 ft)
   (223.00 m / 220.00 m) x 28.50 m  x (8.00 / 8.20 m)

Armament:
      9 - 13.39" / 340 mm 45.0 cal guns - 1,212.54lbs / 550.00kg shells, 110 per gun
     Breech loading guns in turret on barbette mounts, 1909 Model
     3 x 3-gun mounts on centreline ends, majority forward
      16 - 5.51" / 140 mm 55.0 cal guns - 85.98lbs / 39.00kg shells, 175 per gun
     Quick firing guns in casemate mounts, 1909 Model
     16 x Single mounts on sides, evenly spread
      16 hull mounts in casemates- Limited use in heavy seas
      Weight of broadside 12,289 lbs / 5,574 kg

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   8.27" / 210 mm   469.16 ft / 143.00 m   18.04 ft / 5.50 m
   Ends:   1.97" / 50 mm   252.59 ft / 76.99 m   9.84 ft / 3.00 m
   Upper:   3.94" / 100 mm   469.16 ft / 143.00 m   9.02 ft / 2.75 m
     Main Belt covers 100 % of normal length

   - Torpedo Bulkhead - Additional damage containing bulkheads:
      1.18" / 30 mm   469.16 ft / 143.00 m   24.54 ft / 7.48 m
   Beam between torpedo bulkheads 83.66 ft / 25.50 m

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   13.4" / 340 mm   7.09" / 180 mm      11.0" / 280 mm
   2nd:   1.97" / 50 mm   0.98" / 25 mm      1.97" / 50 mm

   - Armoured deck - single deck:
   For and Aft decks: 2.36" / 60 mm
   Forecastle: 0.59" / 15 mm  Quarter deck: 0.59" / 15 mm

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

Machinery:
   Oil fired boilers, steam turbines,
   Electric motors, 4 shafts, 110,000 shp / 82,060 Kw = 28.96 kts
   Range 6,100nm at 10.00 kts
   Bunker at max displacement = 2,071 tons

Complement:
   1,123 - 1,460

Cost:
   £2.676 million / $10.706 million

Distribution of weights at normal displacement:
   Armament: 2,602 tons, 8.8 %
      - Guns: 2,602 tons, 8.8 %
   Armour: 8,200 tons, 27.9 %
      - Belts: 3,863 tons, 13.1 %
      - Torpedo bulkhead: 503 tons, 1.7 %
      - Armament: 1,793 tons, 6.1 %
      - Armour Deck: 1,839 tons, 6.2 %
      - Conning Tower: 202 tons, 0.7 %
   Machinery: 4,545 tons, 15.4 %
   Hull, fittings & equipment: 9,746 tons, 33.1 %
   Fuel, ammunition & stores: 2,540 tons, 8.6 %
   Miscellaneous weights: 1,790 tons, 6.1 %
      - Hull below water: 1,200 tons
      - Hull above water: 100 tons
      - On freeboard deck: 450 tons
      - Above deck: 40 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     35,411 lbs / 16,062 Kg = 29.5 x 13.4 " / 340 mm shells or 4.6 torpedoes
   Stability (Unstable if below 1.00): 1.30
   Metacentric height 7.3 ft / 2.2 m
   Roll period: 14.6 seconds
   Steadiness   - As gun platform (Average = 50 %): 51 %
         - Recoil effect (Restricted arc if above 1.00): 0.42
   Seaboat quality  (Average = 1.00): 1.03

Hull form characteristics:
   Hull has a flush deck,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0.581 / 0.585
   Length to Beam Ratio: 7.72 : 1
   'Natural speed' for length: 26.87 kts
   Power going to wave formation at top speed: 52 %
   Trim (Max stability = 0, Max steadiness = 100): 49
   Bow angle (Positive = bow angles forward): 20.00 degrees
   Stern overhang: 2.40 ft / 0.73 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
      - Forecastle:   20.00 %,  20.51 ft / 6.25 m,  18.86 ft / 5.75 m
      - Forward deck:   30.00 %,  18.86 ft / 5.75 m,  18.86 ft / 5.75 m
      - Aft deck:   35.00 %,  18.86 ft / 5.75 m,  18.86 ft / 5.75 m
      - Quarter deck:   15.00 %,  18.86 ft / 5.75 m,  18.86 ft / 5.75 m
      - Average freeboard:      19.00 ft / 5.79 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): 155.2 %
   Waterplane Area: 48,506 Square feet or 4,506 Square metres
   Displacement factor (Displacement / loading): 100 %
   Structure weight / hull surface area: 168 lbs/sq ft or 819 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.99
      - Longitudinal: 1.04
      - Overall: 1.00
   Adequate machinery, storage, compartmentation space
   Excellent accommodation and workspace room

1910 Design F, Imperial Roman Republic Battlecruiser laid down 1910

Displacement:
   26,882 t light; 28,272 t standard; 29,422 t normal; 30,342 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (731.64 ft / 721.78 ft) x 93.50 ft x (26.25 / 26.91 ft)
   (223.00 m / 220.00 m) x 28.50 m  x (8.00 / 8.20 m)

Armament:
      9 - 13.39" / 340 mm 45.0 cal guns - 1,212.54lbs / 550.00kg shells, 110 per gun
     Breech loading guns in turret on barbette mounts, 1909 Model
     3 x 3-gun mounts on centreline ends, majority forward
      16 - 5.51" / 140 mm 55.0 cal guns - 85.98lbs / 39.00kg shells, 175 per gun
     Quick firing guns in casemate mounts, 1909 Model
     16 x Single mounts on sides, evenly spread
      16 hull mounts in casemates- Limited use in heavy seas
      Weight of broadside 12,289 lbs / 5,574 kg

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   9.84" / 250 mm   469.16 ft / 143.00 m   11.48 ft / 3.50 m
   Ends:   2.36" / 60 mm   252.59 ft / 76.99 m   9.84 ft / 3.00 m
   Upper:   3.94" / 100 mm   469.16 ft / 143.00 m   15.58 ft / 4.75 m
     Main Belt covers 100 % of normal length

   - Torpedo Bulkhead - Additional damage containing bulkheads:
      1.18" / 30 mm   469.16 ft / 143.00 m   24.54 ft / 7.48 m
   Beam between torpedo bulkheads 83.66 ft / 25.50 m

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   13.4" / 340 mm   7.09" / 180 mm      11.0" / 280 mm
   2nd:   3.94" / 100 mm   0.98" / 25 mm      1.97" / 50 mm

   - Armoured deck - single deck:
   For and Aft decks: 2.36" / 60 mm
   Forecastle: 0.98" / 25 mm  Quarter deck: 0.98" / 25 mm

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

Machinery:
   Oil fired boilers, steam turbines,
   Electric motors, 4 shafts, 110,000 shp / 82,060 Kw = 28.96 kts
   Range 6,100nm at 10.00 kts
   Bunker at max displacement = 2,071 tons

Complement:
   1,123 - 1,460

Cost:
   £2.676 million / $10.706 million

Distribution of weights at normal displacement:
   Armament: 2,602 tons, 8.8 %
      - Guns: 2,602 tons, 8.8 %
   Armour: 8,153 tons, 27.7 %
      - Belts: 3,693 tons, 12.6 %
      - Torpedo bulkhead: 503 tons, 1.7 %
      - Armament: 1,849 tons, 6.3 %
      - Armour Deck: 1,905 tons, 6.5 %
      - Conning Tower: 202 tons, 0.7 %
   Machinery: 4,545 tons, 15.4 %
   Hull, fittings & equipment: 9,793 tons, 33.3 %
   Fuel, ammunition & stores: 2,540 tons, 8.6 %
   Miscellaneous weights: 1,790 tons, 6.1 %
      - Hull below water: 1,200 tons
      - Hull above water: 100 tons
      - On freeboard deck: 450 tons
      - Above deck: 40 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     35,381 lbs / 16,048 Kg = 29.5 x 13.4 " / 340 mm shells or 4.6 torpedoes
   Stability (Unstable if below 1.00): 1.29
   Metacentric height 7.2 ft / 2.2 m
   Roll period: 14.7 seconds
   Steadiness   - As gun platform (Average = 50 %): 50 %
         - Recoil effect (Restricted arc if above 1.00): 0.42
   Seaboat quality  (Average = 1.00): 1.03

Hull form characteristics:
   Hull has a flush deck,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0.581 / 0.585
   Length to Beam Ratio: 7.72 : 1
   'Natural speed' for length: 26.87 kts
   Power going to wave formation at top speed: 52 %
   Trim (Max stability = 0, Max steadiness = 100): 49
   Bow angle (Positive = bow angles forward): 20.00 degrees
   Stern overhang: 2.40 ft / 0.73 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
      - Forecastle:   20.00 %,  20.51 ft / 6.25 m,  18.86 ft / 5.75 m
      - Forward deck:   30.00 %,  18.86 ft / 5.75 m,  18.86 ft / 5.75 m
      - Aft deck:   35.00 %,  18.86 ft / 5.75 m,  18.86 ft / 5.75 m
      - Quarter deck:   15.00 %,  18.86 ft / 5.75 m,  18.86 ft / 5.75 m
      - Average freeboard:      19.00 ft / 5.79 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): 155.2 %
   Waterplane Area: 48,506 Square feet or 4,506 Square metres
   Displacement factor (Displacement / loading): 100 %
   Structure weight / hull surface area: 169 lbs/sq ft or 823 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 1.00
      - Longitudinal: 1.04
      - Overall: 1.00
   Adequate machinery, storage, compartmentation space
   Excellent accommodation and workspace room

[snip]

Design G trades triple turrets for twins, reducing the number of barrels to six. This allows for a massive increase in the main belt thickness, as well as almost a knot increase in speed. Additional space is provided for the TDS as well.

1910 Design G, Imperial Roman Republic Battlecruiser laid down 1910

Displacement:
   27,089 t light; 28,255 t standard; 29,405 t normal; 30,325 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (731.64 ft / 721.78 ft) x 93.50 ft x (26.25 / 26.91 ft)
   (223.00 m / 220.00 m) x 28.50 m  x (8.00 / 8.20 m)

Armament:
      6 - 13.39" / 340 mm 45.0 cal guns - 1,212.54lbs / 550.00kg shells, 110 per gun
     Breech loading guns in turret on barbette mounts, 1909 Model
     3 x 2-gun mounts on centreline ends, majority forward
      16 - 5.51" / 140 mm 55.0 cal guns - 85.98lbs / 39.00kg shells, 175 per gun
     Quick firing guns in casemate mounts, 1909 Model
     16 x Single mounts on sides, evenly spread
      16 hull mounts in casemates- Limited use in heavy seas
      Weight of broadside 8,651 lbs / 3,924 kg

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   11.0" / 280 mm   469.16 ft / 143.00 m   18.04 ft / 5.50 m
   Ends:   1.97" / 50 mm   252.59 ft / 76.99 m   9.84 ft / 3.00 m
   Upper:   3.94" / 100 mm   469.16 ft / 143.00 m   9.02 ft / 2.75 m
     Main Belt covers 100 % of normal length

   - Torpedo Bulkhead - Additional damage containing bulkheads:
      1.18" / 30 mm   469.16 ft / 143.00 m   24.54 ft / 7.48 m
   Beam between torpedo bulkheads 80.38 ft / 24.50 m

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   13.4" / 340 mm   7.09" / 180 mm      11.0" / 280 mm
   2nd:   3.94" / 100 mm   0.98" / 25 mm      1.97" / 50 mm

   - Armoured deck - single deck:
   For and Aft decks: 2.76" / 70 mm
   Forecastle: 0.59" / 15 mm  Quarter deck: 0.59" / 15 mm

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

Machinery:
   Oil fired boilers, steam turbines,
   Electric motors, 4 shafts, 124,000 shp / 92,504 Kw = 29.85 kts
   Range 6,100nm at 10.00 kts
   Bunker at max displacement = 2,070 tons

Complement:
   1,122 - 1,459

Cost:
   £2.426 million / $9.705 million

Distribution of weights at normal displacement:
   Armament: 1,836 tons, 6.2 %
      - Guns: 1,836 tons, 6.2 %
   Armour: 9,187 tons, 31.2 %
      - Belts: 4,853 tons, 16.5 %
      - Torpedo bulkhead: 503 tons, 1.7 %
      - Armament: 1,502 tons, 5.1 %
      - Armour Deck: 2,128 tons, 7.2 %
      - Conning Tower: 202 tons, 0.7 %
   Machinery: 5,124 tons, 17.4 %
   Hull, fittings & equipment: 9,152 tons, 31.1 %
   Fuel, ammunition & stores: 2,316 tons, 7.9 %
   Miscellaneous weights: 1,790 tons, 6.1 %
      - Hull below water: 1,200 tons
      - Hull above water: 100 tons
      - On freeboard deck: 450 tons
      - Above deck: 40 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     37,809 lbs / 17,150 Kg = 31.5 x 13.4 " / 340 mm shells or 4.9 torpedoes
   Stability (Unstable if below 1.00): 1.36
   Metacentric height 7.8 ft / 2.4 m
   Roll period: 14.1 seconds
   Steadiness   - As gun platform (Average = 50 %): 50 %
         - Recoil effect (Restricted arc if above 1.00): 0.27
   Seaboat quality  (Average = 1.00): 1.00

Hull form characteristics:
   Hull has a flush deck,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0.581 / 0.584
   Length to Beam Ratio: 7.72 : 1
   'Natural speed' for length: 26.87 kts
   Power going to wave formation at top speed: 53 %
   Trim (Max stability = 0, Max steadiness = 100): 50
   Bow angle (Positive = bow angles forward): 20.00 degrees
   Stern overhang: 2.40 ft / 0.73 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
      - Forecastle:   20.00 %,  20.51 ft / 6.25 m,  18.86 ft / 5.75 m
      - Forward deck:   30.00 %,  18.86 ft / 5.75 m,  18.86 ft / 5.75 m
      - Aft deck:   35.00 %,  18.86 ft / 5.75 m,  18.86 ft / 5.75 m
      - Quarter deck:   15.00 %,  18.86 ft / 5.75 m,  18.86 ft / 5.75 m
      - Average freeboard:      19.00 ft / 5.79 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 99.5 %
      - Above water (accommodation/working, high = better): 155.3 %
   Waterplane Area: 48,491 Square feet or 4,505 Square metres
   Displacement factor (Displacement / loading): 103 %
   Structure weight / hull surface area: 153 lbs/sq ft or 748 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 1.01
      - Longitudinal: 1.00
      - Overall: 1.00
   Adequate machinery, storage, compartmentation space
   Excellent accommodation and workspace room

[snip]

Design H does more to the guns. Again twin turrets are used, this time with two each for and aft. The reduction from nine barrels to eight allows for some improvement to the main belt and additional room for the TDS.

1910 Design H, Imperial Roman Republic Battlecruiser laid down 1910

Displacement:
   26,940 t light; 28,255 t standard; 29,405 t normal; 30,325 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (731.64 ft / 721.78 ft) x 93.50 ft x (26.25 / 26.91 ft)
   (223.00 m / 220.00 m) x 28.50 m  x (8.00 / 8.20 m)

Armament:
      8 - 13.39" / 340 mm 45.0 cal guns - 1,212.54lbs / 550.00kg shells, 110 per gun
     Breech loading guns in turret on barbette mounts, 1909 Model
     4 x 2-gun mounts on centreline ends, evenly spread
      16 - 5.51" / 140 mm 55.0 cal guns - 85.98lbs / 39.00kg shells, 175 per gun
     Quick firing guns in casemate mounts, 1909 Model
     16 x Single mounts on sides, evenly spread
      16 hull mounts in casemates- Limited use in heavy seas
      Weight of broadside 11,076 lbs / 5,024 kg

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   9.84" / 250 mm   469.16 ft / 143.00 m   18.04 ft / 5.50 m
   Ends:   1.97" / 50 mm   252.59 ft / 76.99 m   9.84 ft / 3.00 m
   Upper:   3.94" / 100 mm   469.16 ft / 143.00 m   9.02 ft / 2.75 m
     Main Belt covers 100 % of normal length

   - Torpedo Bulkhead - Additional damage containing bulkheads:
      1.18" / 30 mm   469.16 ft / 143.00 m   24.54 ft / 7.48 m
   Beam between torpedo bulkheads 81.20 ft / 24.75 m

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   13.4" / 340 mm   7.09" / 180 mm      11.0" / 280 mm
   2nd:   1.97" / 50 mm   0.98" / 25 mm      1.97" / 50 mm

   - Armoured deck - single deck:
   For and Aft decks: 2.36" / 60 mm
   Forecastle: 0.59" / 15 mm  Quarter deck: 0.59" / 15 mm

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

Machinery:
   Oil fired boilers, steam turbines,
   Electric motors, 4 shafts, 110,000 shp / 82,060 Kw = 28.97 kts
   Range 6,100nm at 10.00 kts
   Bunker at max displacement = 2,070 tons

Complement:
   1,122 - 1,459

Cost:
   £2.566 million / $10.262 million

Distribution of weights at normal displacement:
   Armament: 2,346 tons, 8.0 %
      - Guns: 2,346 tons, 8.0 %
   Armour: 8,868 tons, 30.2 %
      - Belts: 4,428 tons, 15.1 %
      - Torpedo bulkhead: 503 tons, 1.7 %
      - Armament: 1,897 tons, 6.5 %
      - Armour Deck: 1,838 tons, 6.3 %
      - Conning Tower: 202 tons, 0.7 %
   Machinery: 4,545 tons, 15.5 %
   Hull, fittings & equipment: 9,390 tons, 31.9 %
   Fuel, ammunition & stores: 2,465 tons, 8.4 %
   Miscellaneous weights: 1,790 tons, 6.1 %
      - Hull below water: 1,200 tons
      - Hull above water: 100 tons
      - On freeboard deck: 450 tons
      - Above deck: 40 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     36,944 lbs / 16,757 Kg = 30.8 x 13.4 " / 340 mm shells or 4.9 torpedoes
   Stability (Unstable if below 1.00): 1.32
   Metacentric height 7.4 ft / 2.2 m
   Roll period: 14.5 seconds
   Steadiness   - As gun platform (Average = 50 %): 50 %
         - Recoil effect (Restricted arc if above 1.00): 0.37
   Seaboat quality  (Average = 1.00): 1.03

Hull form characteristics:
   Hull has a flush deck,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0.581 / 0.584
   Length to Beam Ratio: 7.72 : 1
   'Natural speed' for length: 26.87 kts
   Power going to wave formation at top speed: 52 %
   Trim (Max stability = 0, Max steadiness = 100): 48
   Bow angle (Positive = bow angles forward): 20.00 degrees
   Stern overhang: 2.40 ft / 0.73 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
      - Forecastle:   20.00 %,  20.51 ft / 6.25 m,  18.86 ft / 5.75 m
      - Forward deck:   30.00 %,  18.86 ft / 5.75 m,  18.86 ft / 5.75 m
      - Aft deck:   35.00 %,  18.86 ft / 5.75 m,  18.86 ft / 5.75 m
      - Quarter deck:   15.00 %,  18.86 ft / 5.75 m,  18.86 ft / 5.75 m
      - Average freeboard:      19.00 ft / 5.79 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 99.0 %
      - Above water (accommodation/working, high = better): 155.3 %
   Waterplane Area: 48,491 Square feet or 4,505 Square metres
   Displacement factor (Displacement / loading): 101 %
   Structure weight / hull surface area: 161 lbs/sq ft or 784 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 1.00
      - Longitudinal: 1.00
      - Overall: 1.00
   Adequate machinery, storage, compartmentation space
   Excellent accommodation and workspace room

[snip]

An Improved Lauri class cruiser. Faster with slightly modified protection.

1910 Design A, Imperial Roman Republic Cruiser laid down 1910

Displacement:
   4,893 t light; 5,066 t standard; 5,505 t normal; 5,857 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (485.58 ft / 475.72 ft) x 47.57 ft x (16.40 / 17.21 ft)
   (148.00 m / 145.00 m) x 14.50 m  x (5.00 / 5.24 m)

Armament:
      7 - 5.51" / 140 mm 55.0 cal guns - 85.98lbs / 39.00kg shells, 175 per gun
     Quick firing guns in deck and hoist mounts, 1909 Model
     5 x Single mounts on centreline ends, majority aft
      2 raised mounts - superfiring
     2 x Single mounts on sides, forward deck aft
      4 - 2.95" / 75.0 mm 50.0 cal guns - 13.23lbs / 6.00kg shells, 150 per gun
     Quick firing guns in deck mounts, 1902 Model
     4 x Single mounts on sides, aft evenly spread
      4 raised mounts
      Weight of broadside 655 lbs / 297 kg

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   2.56" / 65 mm   389.63 ft / 118.76 m   8.20 ft / 2.50 m
   Ends:   Unarmoured
     Main Belt covers 126 % of normal length

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   1.97" / 50 mm   0.20" / 5 mm      0.98" / 25 mm
   2nd:   0.39" / 10 mm   0.20" / 5 mm            -

   - Protected deck - single deck:
   For and Aft decks: 2.36" / 60 mm

   - Conning towers: Forward 2.76" / 70 mm, Aft 0.00" / 0 mm

Machinery:
   Oil fired boilers, steam turbines,
   Direct drive, 4 shafts, 46,000 shp / 34,316 Kw = 29.44 kts
   Range 7,000nm at 10.00 kts
   Bunker at max displacement = 791 tons

Complement:
   319 - 415

Cost:
   £0.514 million / $2.055 million

Distribution of weights at normal displacement:
   Armament: 218 tons, 4.0 %
      - Guns: 218 tons, 4.0 %
   Armour: 994 tons, 18.1 %
      - Belts: 323 tons, 5.9 %
      - Armament: 27 tons, 0.5 %
      - Armour Deck: 625 tons, 11.4 %
      - Conning Tower: 19 tons, 0.3 %
   Machinery: 1,901 tons, 34.5 %
   Hull, fittings & equipment: 1,594 tons, 29.0 %
   Fuel, ammunition & stores: 613 tons, 11.1 %
   Miscellaneous weights: 185 tons, 3.4 %
      - Hull below water: 5 tons
      - Hull above water: 50 tons
      - On freeboard deck: 105 tons
      - Above deck: 25 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     3,935 lbs / 1,785 Kg = 47.0 x 5.5 " / 140 mm shells or 0.8 torpedoes
   Stability (Unstable if below 1.00): 1.25
   Metacentric height 2.5 ft / 0.8 m
   Roll period: 12.7 seconds
   Steadiness   - As gun platform (Average = 50 %): 50 %
         - Recoil effect (Restricted arc if above 1.00): 0.30
   Seaboat quality  (Average = 1.00): 1.00

Hull form characteristics:
   Hull has rise forward of midbreak,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0.519 / 0.526
   Length to Beam Ratio: 10.00 : 1
   'Natural speed' for length: 21.81 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: 2.69 ft / 0.82 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
      - Forecastle:   9.05 %,  19.69 ft / 6.00 m,  19.69 ft / 6.00 m
      - Forward deck:   45.00 %,  19.69 ft / 6.00 m,  19.69 ft / 6.00 m
      - Aft deck:   36.90 %,  10.66 ft / 3.25 m,  10.66 ft / 3.25 m
      - Quarter deck:   9.05 %,  10.66 ft / 3.25 m,  10.66 ft / 3.25 m
      - Average freeboard:      15.54 ft / 4.74 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 125.8 %
      - Above water (accommodation/working, high = better): 143.1 %
   Waterplane Area: 15,344 Square feet or 1,426 Square metres
   Displacement factor (Displacement / loading): 96 %
   Structure weight / hull surface area: 70 lbs/sq ft or 341 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.88
      - Longitudinal: 1.12
      - Overall: 0.90
   Caution: Hull subject to strain in open-sea
   Cramped machinery, storage, compartmentation space
   Excellent accommodation and workspace room

[snip]

Moving forward with the 1910 Battlecruiser, Designs E and G have been selected for further development. Both designs trade a little bit of speed for some additional wiggle room that is used on some additional guns. Both designs received proper Misc weight allocations as well. The question is do the gains in protection and speed on Design G outweigh the decrease in firepower and inaccuracy of spotting from Design E.

1910 E2, Imperial Roman Republic Battlecruiser laid down 1910

Displacement:
   26,827 t light; 28,255 t standard; 29,405 t normal; 30,325 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (731.64 ft / 721.78 ft) x 93.50 ft x (26.25 / 26.91 ft)
   (223.00 m / 220.00 m) x 28.50 m  x (8.00 / 8.20 m)

Armament:
      9 - 13.39" / 340 mm 45.0 cal guns - 1,212.54lbs / 550.00kg shells, 110 per gun
     Breech loading guns in turret on barbette mounts, 1909 Model
     3 x 3-gun mounts on centreline ends, majority forward
      16 - 5.51" / 140 mm 55.0 cal guns - 85.98lbs / 39.00kg shells, 175 per gun
     Quick firing guns in casemate mounts, 1909 Model
     16 x Single mounts on sides, evenly spread
      16 hull mounts in casemates- Limited use in heavy seas
      6 - 3.94" / 100 mm 45.0 cal guns - 30.86lbs / 14.00kg shells, 350 per gun
     Breech loading guns in deck mounts, 1906 Model
     6 x Single mounts on centreline ends, evenly spread
      6 raised mounts
      4 - 1.77" / 45.0 mm 50.0 cal guns - 3.31lbs / 1.50kg shells, 450 per gun
     Breech loading guns in deck mounts, 1905 Model
     4 x Single mounts on side ends, evenly spread
      Weight of broadside 12,487 lbs / 5,664 kg

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   8.27" / 210 mm   469.16 ft / 143.00 m   18.04 ft / 5.50 m
   Ends:   1.97" / 50 mm   252.59 ft / 76.99 m   9.84 ft / 3.00 m
   Upper:   3.94" / 100 mm   469.16 ft / 143.00 m   9.02 ft / 2.75 m
     Main Belt covers 100 % of normal length

   - Torpedo Bulkhead - Additional damage containing bulkheads:
      1.18" / 30 mm   469.16 ft / 143.00 m   24.54 ft / 7.48 m
   Beam between torpedo bulkheads 83.66 ft / 25.50 m

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   13.4" / 340 mm   7.09" / 180 mm      11.0" / 280 mm
   2nd:   1.97" / 50 mm   0.98" / 25 mm      1.97" / 50 mm

   - Armoured deck - single deck:
   For and Aft decks: 2.36" / 60 mm
   Forecastle: 0.59" / 15 mm  Quarter deck: 0.59" / 15 mm

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

Machinery:
   Oil fired boilers, steam turbines,
   Electric motors, 4 shafts, 108,000 shp / 80,568 Kw = 28.83 kts
   Range 6,100nm at 10.00 kts
   Bunker at max displacement = 2,070 tons

Complement:
   1,122 - 1,459

Cost:
   £2.673 million / $10.690 million

Distribution of weights at normal displacement:
   Armament: 2,633 tons, 9.0 %
      - Guns: 2,633 tons, 9.0 %
   Armour: 8,190 tons, 27.9 %
      - Belts: 3,854 tons, 13.1 %
      - Torpedo bulkhead: 503 tons, 1.7 %
      - Armament: 1,793 tons, 6.1 %
      - Armour Deck: 1,838 tons, 6.3 %
      - Conning Tower: 202 tons, 0.7 %
   Machinery: 4,463 tons, 15.2 %
   Hull, fittings & equipment: 9,741 tons, 33.1 %
   Fuel, ammunition & stores: 2,578 tons, 8.8 %
   Miscellaneous weights: 1,800 tons, 6.1 %
      - Hull below water: 1,200 tons
      - Hull above water: 100 tons
      - On freeboard deck: 400 tons
      - Above deck: 100 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     35,622 lbs / 16,158 Kg = 29.7 x 13.4 " / 340 mm shells or 4.6 torpedoes
   Stability (Unstable if below 1.00): 1.31
   Metacentric height 7.3 ft / 2.2 m
   Roll period: 14.5 seconds
   Steadiness   - As gun platform (Average = 50 %): 50 %
         - Recoil effect (Restricted arc if above 1.00): 0.42
   Seaboat quality  (Average = 1.00): 1.04

Hull form characteristics:
   Hull has a flush deck,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0.581 / 0.584
   Length to Beam Ratio: 7.72 : 1
   'Natural speed' for length: 26.87 kts
   Power going to wave formation at top speed: 51 %
   Trim (Max stability = 0, Max steadiness = 100): 48
   Bow angle (Positive = bow angles forward): 20.00 degrees
   Stern overhang: 2.40 ft / 0.73 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
      - Forecastle:   20.00 %,  20.51 ft / 6.25 m,  18.86 ft / 5.75 m
      - Forward deck:   30.00 %,  18.86 ft / 5.75 m,  18.86 ft / 5.75 m
      - Aft deck:   35.00 %,  18.86 ft / 5.75 m,  18.86 ft / 5.75 m
      - Quarter deck:   15.00 %,  18.86 ft / 5.75 m,  18.86 ft / 5.75 m
      - Average freeboard:      19.00 ft / 5.79 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 99.3 %
      - Above water (accommodation/working, high = better): 155.3 %
   Waterplane Area: 48,491 Square feet or 4,505 Square metres
   Displacement factor (Displacement / loading): 100 %
   Structure weight / hull surface area: 168 lbs/sq ft or 821 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.99
      - Longitudinal: 1.04
      - Overall: 1.00
   Adequate machinery, storage, compartmentation space
   Excellent accommodation and workspace room

Misc Distribution
--Below Water(1200t)
----1120t Electric Drives
----40t Additional Pumps
----40t Reserve
--Above Water (100t)
----30t Flag Fag Facilities
----30t Improved Officer Accommodations
----30t Improved Crew Accommodations
----10t Short Range Wireless
--On Deck (400t)
----265t 1908 Fire Control
----25t Long Range Wireless
----40t Admiralty Accommodations
----40t Flag Facilities
----30t Construction Reserve
--Above Deck (100t)
----50t Improved Aquisition Structures
----30t Improved Signaling Equipment
----20t Additional Searchlights

1910 G2, Imperial Roman Republic Battlecruiser laid down 1910

Displacement:
   27,049 t light; 28,255 t standard; 29,405 t normal; 30,325 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (731.64 ft / 721.78 ft) x 93.50 ft x (26.25 / 26.91 ft)
   (223.00 m / 220.00 m) x 28.50 m  x (8.00 / 8.20 m)

Armament:
      6 - 13.39" / 340 mm 45.0 cal guns - 1,212.54lbs / 550.00kg shells, 110 per gun
     Breech loading guns in turret on barbette mounts, 1909 Model
     3 x 2-gun mounts on centreline ends, majority forward
      16 - 5.51" / 140 mm 55.0 cal guns - 85.98lbs / 39.00kg shells, 175 per gun
     Quick firing guns in casemate mounts, 1909 Model
     16 x Single mounts on sides, evenly spread
      16 hull mounts in casemates- Limited use in heavy seas
      6 - 3.94" / 100 mm 45.0 cal guns - 30.86lbs / 14.00kg shells, 350 per gun
     Breech loading guns in deck mounts, 1906 Model
     6 x Single mounts on centreline ends, evenly spread
      6 raised mounts
      4 - 1.77" / 45.0 mm 50.0 cal guns - 3.31lbs / 1.50kg shells, 450 per gun
     Breech loading guns in deck mounts, 1905 Model
     4 x Single mounts on side ends, evenly spread
      Weight of broadside 8,849 lbs / 4,014 kg

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   11.0" / 280 mm   469.16 ft / 143.00 m   18.04 ft / 5.50 m
   Ends:   1.97" / 50 mm   252.59 ft / 76.99 m   9.84 ft / 3.00 m
   Upper:   3.94" / 100 mm   469.16 ft / 143.00 m   9.02 ft / 2.75 m
     Main Belt covers 100 % of normal length

   - Torpedo Bulkhead - Additional damage containing bulkheads:
      1.18" / 30 mm   469.16 ft / 143.00 m   24.54 ft / 7.48 m
   Beam between torpedo bulkheads 80.38 ft / 24.50 m

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   13.4" / 340 mm   7.09" / 180 mm      11.0" / 280 mm
   2nd:   3.94" / 100 mm   0.98" / 25 mm      1.97" / 50 mm

   - Armoured deck - single deck:
   For and Aft decks: 2.76" / 70 mm
   Forecastle: 0.59" / 15 mm  Quarter deck: 0.59" / 15 mm

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

Machinery:
   Oil fired boilers, steam turbines,
   Electric motors, 4 shafts, 120,000 shp / 89,520 Kw = 29.61 kts
   Range 6,100nm at 10.00 kts
   Bunker at max displacement = 2,070 tons

Complement:
   1,122 - 1,459

Cost:
   £2.411 million / $9.645 million

Distribution of weights at normal displacement:
   Armament: 1,867 tons, 6.4 %
      - Guns: 1,867 tons, 6.4 %
   Armour: 9,178 tons, 31.2 %
      - Belts: 4,843 tons, 16.5 %
      - Torpedo bulkhead: 503 tons, 1.7 %
      - Armament: 1,502 tons, 5.1 %
      - Armour Deck: 2,128 tons, 7.2 %
      - Conning Tower: 202 tons, 0.7 %
   Machinery: 4,959 tons, 16.9 %
   Hull, fittings & equipment: 9,146 tons, 31.1 %
   Fuel, ammunition & stores: 2,356 tons, 8.0 %
   Miscellaneous weights: 1,900 tons, 6.5 %
      - Hull below water: 1,300 tons
      - Hull above water: 100 tons
      - On freeboard deck: 400 tons
      - Above deck: 100 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     38,298 lbs / 17,372 Kg = 31.9 x 13.4 " / 340 mm shells or 5.0 torpedoes
   Stability (Unstable if below 1.00): 1.36
   Metacentric height 7.8 ft / 2.4 m
   Roll period: 14.1 seconds
   Steadiness   - As gun platform (Average = 50 %): 51 %
         - Recoil effect (Restricted arc if above 1.00): 0.28
   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): 0.581 / 0.584
   Length to Beam Ratio: 7.72 : 1
   'Natural speed' for length: 26.87 kts
   Power going to wave formation at top speed: 53 %
   Trim (Max stability = 0, Max steadiness = 100): 50
   Bow angle (Positive = bow angles forward): 20.00 degrees
   Stern overhang: 2.40 ft / 0.73 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
      - Forecastle:   20.00 %,  20.51 ft / 6.25 m,  18.86 ft / 5.75 m
      - Forward deck:   30.00 %,  18.86 ft / 5.75 m,  18.86 ft / 5.75 m
      - Aft deck:   35.00 %,  18.86 ft / 5.75 m,  18.86 ft / 5.75 m
      - Quarter deck:   15.00 %,  18.86 ft / 5.75 m,  18.86 ft / 5.75 m
      - Average freeboard:      19.00 ft / 5.79 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): 155.3 %
   Waterplane Area: 48,491 Square feet or 4,505 Square metres
   Displacement factor (Displacement / loading): 104 %
   Structure weight / hull surface area: 153 lbs/sq ft or 749 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 1.01
      - Longitudinal: 1.00
      - Overall: 1.00
   Adequate machinery, storage, compartmentation space
   Excellent accommodation and workspace room

Misc Distribution
--Below Water(1300t)
----1240t Electric Drives
----40t Additional Pumps
----20t Reserve
--Above Water (100t)
----30t Flag Fag Facilities
----30t Improved Officer Accommodations
----30t Improved Crew Accommodations
----10t Short Range Wireless
--On Deck (400t)
----190t 1908 Fire Control
----25t Long Range Wireless
----40t Admiralty Accommodations
----40t Flag Facilities
----105t Construction Reserve
--Above Deck (100t)
----50t Improved Aquisition Structures
----30t Improved Signaling Equipment
----20t Additional Searchlights

[snip]

A revision to the F-Class Destroyer to better match the 750t E-Class Design. Little faster, with less Misc weight.

F-Class, Imperial Roman Republic Destroyer laid down 1910

Displacement:
   1,000 t light; 1,035 t standard; 1,106 t normal; 1,163 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (287.07 ft / 278.87 ft) x 29.53 ft x (11.48 / 11.87 ft)
   (87.50 m / 85.00 m) x 9.00 m  x (3.50 / 3.62 m)

Armament:
      4 - 3.94" / 100 mm 45.0 cal guns - 30.77lbs / 13.96kg shells, 175 per gun
     Quick firing guns in deck mounts, 1906 Model
     2 x Single mounts on centreline ends, evenly spread
      1 raised mount aft - superfiring
     2 x Single mounts on sides, forward deck centre
      2 - 1.77" / 45.0 mm 50.0 cal guns - 2.94lbs / 1.33kg shells, 250 per gun
     Quick firing guns in deck mounts, 1905 Model
     2 x Single mounts on sides, aft deck centre
      2 raised mounts
      4 - 0.26" / 6.5 mm 60.0 cal guns - 0.01lbs / 0.00kg shells, 1,500 per gun
     Machine guns in deck mounts, 1910 Model
     4 x Single mounts on sides, evenly spread
      4 raised mounts
      Weight of broadside 129 lbs / 59 kg

Armour:
   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   0.98" / 25 mm         -               -
   2nd:   0.59" / 15 mm         -               -
   3rd:   0.59" / 15 mm         -               -

Machinery:
   Oil fired boilers, steam turbines,
   Direct drive, 2 shafts, 28,000 shp / 20,888 Kw = 31.49 kts
   Range 3,000nm at 10.00 kts
   Bunker at max displacement = 128 tons

Complement:
   95 - 124

Cost:
   £0.129 million / $0.515 million

Distribution of weights at normal displacement:
   Armament: 24 tons, 2.1 %
      - Guns: 24 tons, 2.1 %
   Armour: 20 tons, 1.8 %
      - Armament: 20 tons, 1.8 %
   Machinery: 624 tons, 56.4 %
   Hull, fittings & equipment: 282 tons, 25.5 %
   Fuel, ammunition & stores: 106 tons, 9.6 %
   Miscellaneous weights: 50 tons, 4.5 %
      - On freeboard deck: 50 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     275 lbs / 125 Kg = 9.0 x 3.9 " / 100 mm shells or 0.2 torpedoes
   Stability (Unstable if below 1.00): 1.32
   Metacentric height 1.3 ft / 0.4 m
   Roll period: 10.8 seconds
   Steadiness   - As gun platform (Average = 50 %): 48 %
         - Recoil effect (Restricted arc if above 1.00): 0.19
   Seaboat quality  (Average = 1.00): 0.77

Hull form characteristics:
   Hull has rise forward of midbreak,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0.409 / 0.416
   Length to Beam Ratio: 9.44 : 1
   'Natural speed' for length: 16.70 kts
   Power going to wave formation at top speed: 70 %
   Trim (Max stability = 0, Max steadiness = 100): 59
   Bow angle (Positive = bow angles forward): 20.00 degrees
   Stern overhang: 2.23 ft / 0.68 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
      - Forecastle:   20.00 %,  16.40 ft / 5.00 m,  15.58 ft / 4.75 m
      - Forward deck:   44.00 %,  15.58 ft / 4.75 m,  15.58 ft / 4.75 m
      - Aft deck:   21.00 %,  6.56 ft / 2.00 m,  6.56 ft / 2.00 m
      - Quarter deck:   15.00 %,  6.56 ft / 2.00 m,  6.56 ft / 2.00 m
      - Average freeboard:      12.40 ft / 3.78 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 188.1 %
      - Above water (accommodation/working, high = better): 129.5 %
   Waterplane Area: 5,097 Square feet or 474 Square metres
   Displacement factor (Displacement / loading): 45 %
   Structure weight / hull surface area: 30 lbs/sq ft or 144 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.50
      - Longitudinal: 2.10
      - Overall: 0.57
   Cramped machinery, storage, compartmentation space
   Excellent accommodation and workspace room
   Poor seaboat, wet and uncomfortable, reduced performance in heavy weather
Misc Distribution
--On Deck (50t)
----36t 12x530mm Torpedos [Two triple tube mounts per side]
----2t Improved spray protections for Torpedo tubes
----10t Short-Range Wireless
----2t Minesweeping Paravanes

[snip]

1910 will also see a new cruiser design. Basically a Lauri Class cruiser with the speed of the Marathona Class Destroyer Leaders. The intent is to begin replacing the older SRE cruisers with this design.

1910 Design B, Imperial Roman Republic Cruiser laid down 1910

Displacement:
   5,000 t light; 5,175 t standard; 5,620 t normal; 5,976 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (485.85 ft / 475.72 ft) x 47.57 ft x (16.40 / 17.21 ft)
   (148.09 m / 145.00 m) x 14.50 m  x (5.00 / 5.24 m)

Armament:
      7 - 5.51" / 140 mm 55.0 cal guns - 85.98lbs / 39.00kg shells, 175 per gun
     Quick firing guns in deck and hoist mounts, 1909 Model
     5 x Single mounts on centreline ends, majority aft
      2 raised mounts - superfiring
     2 x Single mounts on sides, forward deck aft
      4 - 2.95" / 75.0 mm 50.0 cal guns - 13.23lbs / 6.00kg shells, 150 per gun
     Quick firing guns in deck mounts, 1902 Model
     4 x Single mounts on sides, aft evenly spread
      4 raised mounts
      Weight of broadside 655 lbs / 297 kg

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   3.15" / 80 mm   389.63 ft / 118.76 m   8.20 ft / 2.50 m
   Ends:   Unarmoured
     Main Belt covers 126 % of normal length

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   1.97" / 50 mm   0.20" / 5 mm      0.98" / 25 mm
   2nd:   0.39" / 10 mm   0.20" / 5 mm            -

   - Protected deck - single deck:
   For and Aft decks: 2.36" / 60 mm
   Forecastle: 1.18" / 30 mm  Quarter deck: 1.18" / 30 mm

   - Conning towers: Forward 2.76" / 70 mm, Aft 0.00" / 0 mm

Machinery:
   Oil fired boilers, steam turbines,
   Direct drive, 4 shafts, 46,000 shp / 34,316 Kw = 29.31 kts
   Range 7,000nm at 10.00 kts
   Bunker at max displacement = 801 tons

Complement:
   323 - 421

Cost:
   £0.517 million / $2.070 million

Distribution of weights at normal displacement:
   Armament: 218 tons, 3.9 %
      - Guns: 218 tons, 3.9 %
   Armour: 1,102 tons, 19.6 %
      - Belts: 398 tons, 7.1 %
      - Armament: 27 tons, 0.5 %
      - Armour Deck: 658 tons, 11.7 %
      - Conning Tower: 19 tons, 0.3 %
   Machinery: 1,901 tons, 33.8 %
   Hull, fittings & equipment: 1,604 tons, 28.5 %
   Fuel, ammunition & stores: 620 tons, 11.0 %
   Miscellaneous weights: 175 tons, 3.1 %
      - Hull below water: 5 tons
      - Hull above water: 50 tons
      - On freeboard deck: 105 tons
      - Above deck: 15 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     4,160 lbs / 1,887 Kg = 49.7 x 5.5 " / 140 mm shells or 0.8 torpedoes
   Stability (Unstable if below 1.00): 1.25
   Metacentric height 2.5 ft / 0.8 m
   Roll period: 12.7 seconds
   Steadiness   - As gun platform (Average = 50 %): 50 %
         - Recoil effect (Restricted arc if above 1.00): 0.30
   Seaboat quality  (Average = 1.00): 1.00

Hull form characteristics:
   Hull has rise forward of midbreak,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0.530 / 0.537
   Length to Beam Ratio: 10.00 : 1
   'Natural speed' for length: 21.81 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: 2.07 ft / 0.63 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
      - Forecastle:   9.05 %,  22.15 ft / 6.75 m,  19.69 ft / 6.00 m
      - Forward deck:   45.00 %,  19.69 ft / 6.00 m,  19.69 ft / 6.00 m
      - Aft deck:   36.90 %,  10.66 ft / 3.25 m,  10.66 ft / 3.25 m
      - Quarter deck:   9.05 %,  10.66 ft / 3.25 m,  10.66 ft / 3.25 m
      - Average freeboard:      15.63 ft / 4.76 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 123.3 %
      - Above water (accommodation/working, high = better): 142.8 %
   Waterplane Area: 15,502 Square feet or 1,440 Square metres
   Displacement factor (Displacement / loading): 97 %
   Structure weight / hull surface area: 70 lbs/sq ft or 340 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.88
      - Longitudinal: 1.12
      - Overall: 0.90
   Caution: Hull subject to strain in open-sea
   Cramped machinery, storage, compartmentation space
   Excellent accommodation and workspace room
Misc Distribution
--Below Water (5t)
----5t Additional Pumps
--Above Water (40t)
----10t Improved Officer Accommodations
----10t Improved Crew Accommodations
----10t Short-Range Wireless
----5t Improved Ventilation
----5t Construction Reserve
--On Deck (105t)
----36t 12x530mm Torpedos [Two Tripple tube mounts per side]
----25t 1906 Fire Control
----25t Long-Range Wireless
----6t Improved Torpedo Handling Equipment
----5t Additional Officer accommodations
----3t Construction Reserve
--Above Deck (15t)
----10t Improved Aquisition Structures
----5t Additional Searchlights

[snip]

Back to the Battlecruiser concept and I thing I did a thing that is fun.

1910 BC, Imperial Roman Navy Battlecruiser laid down 1910

Displacement:
   27,250 t light; 28,646 t standard; 29,765 t normal; 30,660 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (643.36 ft / 629.92 ft) x 91.86 ft x (26.25 / 26.93 ft)
   (196.09 m / 192.00 m) x 28.00 m  x (8.00 / 8.21 m)

Armament:
      9 - 13.39" / 340 mm 45.0 cal guns - 1,212.54lbs / 550.00kg shells, 110 per gun
     Breech loading guns in turret on barbette mounts, 1909 Model
     2 x 3-gun mounts on centreline, forward deck forward
      2 raised mounts - superfiring
     1 x 3-gun mount on centreline, forward deck aft
      16 - 5.51" / 140 mm 55.0 cal guns - 85.98lbs / 39.00kg shells, 175 per gun
     Breech loading guns in casemate mounts, 1909 Model
     16 x Single mounts on sides, aft evenly spread
      8 raised mounts
      Weight of broadside 12,289 lbs / 5,574 kg

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   9.45" / 240 mm   379.72 ft / 115.74 m   16.40 ft / 5.00 m
   Ends:   3.94" / 100 mm   250.20 ft / 76.26 m   9.84 ft / 3.00 m
   Upper:   3.94" / 100 mm   379.72 ft / 115.74 m   9.02 ft / 2.75 m
     Main Belt covers 93 % of normal length

   - Torpedo Bulkhead - Additional damage containing bulkheads:
      1.57" / 40 mm   379.72 ft / 115.74 m   26.25 ft / 8.00 m
   Beam between torpedo bulkheads 83.66 ft / 25.50 m

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   13.4" / 340 mm   7.09" / 180 mm      11.0" / 280 mm
   2nd:   3.94" / 100 mm   0.98" / 25 mm      1.97" / 50 mm

   - Armoured deck - multiple decks:
   For and Aft decks: 2.95" / 75 mm
   Forecastle: 0.98" / 25 mm  Quarter deck: 0.98" / 25 mm

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

Machinery:
   Oil fired boilers, steam turbines,
   Electric motors, 4 shafts, 100,000 shp / 74,600 Kw = 27.45 kts
   Range 6,000nm at 10.00 kts
   Bunker at max displacement = 2,014 tons

Complement:
   1,132 - 1,472

Cost:
   £2.631 million / $10.526 million

Distribution of weights at normal displacement:
   Armament: 2,564 tons, 8.6 %
      - Guns: 2,564 tons, 8.6 %
   Armour: 8,719 tons, 29.3 %
      - Belts: 3,569 tons, 12.0 %
      - Torpedo bulkhead: 581 tons, 2.0 %
      - Armament: 2,213 tons, 7.4 %
      - Armour Deck: 2,153 tons, 7.2 %
      - Conning Tower: 204 tons, 0.7 %
   Machinery: 4,132 tons, 13.9 %
   Hull, fittings & equipment: 9,995 tons, 33.6 %
   Fuel, ammunition & stores: 2,515 tons, 8.4 %
   Miscellaneous weights: 1,840 tons, 6.2 %
      - Hull below water: 1,250 tons
      - Hull above water: 100 tons
      - On freeboard deck: 450 tons
      - Above deck: 40 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     35,367 lbs / 16,042 Kg = 29.5 x 13.4 " / 340 mm shells or 4.9 torpedoes
   Stability (Unstable if below 1.00): 1.15
   Metacentric height 5.7 ft / 1.7 m
   Roll period: 16.2 seconds
   Steadiness   - As gun platform (Average = 50 %): 50 %
         - Recoil effect (Restricted arc if above 1.00): 0.67
   Seaboat quality  (Average = 1.00): 1.00

Hull form characteristics:
   Hull has raised forecastle,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0.686 / 0.689
   Length to Beam Ratio: 6.86 : 1
   'Natural speed' for length: 25.10 kts
   Power going to wave formation at top speed: 57 %
   Trim (Max stability = 0, Max steadiness = 100): 50
   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:   24.72 %,  28.71 ft / 8.75 m,  28.71 ft / 8.75 m
      - Forward deck:   30.00 %,  19.69 ft / 6.00 m,  19.69 ft / 6.00 m
      - Aft deck:   30.28 %,  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:      21.92 ft / 6.68 m

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 92.3 %
      - Above water (accommodation/working, high = better): 151.7 %
   Waterplane Area: 45,795 Square feet or 4,254 Square metres
   Displacement factor (Displacement / loading): 102 %
   Structure weight / hull surface area: 178 lbs/sq ft or 871 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.96
      - Longitudinal: 1.50
      - Overall: 1.00
   Adequate machinery, storage, compartmentation space
   Excellent accommodation and workspace room