Imperial Roman Navy: 1910-1914 Designs

[snip]

Most of the Hull below water is for the Electric drives. I'll see if I can get to a more detailed breakdown today.

[snip]

Eight of these ships are planned over 1913-14 to replace the Ariminum class cruisers. The intent is a good-enough battleline escort and general purpace cruiser.

Replacement Cruiser Template 1913, Imperial Roman Cruiser laid down 1913

Displacement:
   2,990 t light; 3,116 t standard; 3,319 t normal; 3,481 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (400.26 ft / 393.70 ft) x 39.37 ft x (13.12 / 13.64 ft)
   (122.00 m / 120.00 m) x 12.00 m  x (4.00 / 4.16 m)

Armament:
      6 - 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
     2 x Twin mounts on centreline ends, evenly spread
     2 x Single mounts on sides, forward deck aft
      4 - 2.95" / 75.0 mm 45.0 cal guns - 13.23lbs / 6.00kg shells, 250 per gun
     Quick firing guns in deck and hoist mounts, 1902 Model
     4 x Single mounts on sides, evenly spread
      4 raised mounts
      2 - 1.77" / 45.0 mm 50.0 cal guns - 2.76lbs / 1.25kg shells, 550 per gun
     Anti-air guns in deck mounts, 1913 Model
     2 x Single mounts on sides, forward deck aft
      2 raised mounts
      4 - 0.26" / 6.5 mm 110.0 cal guns - 0.01lbs / 0.00kg shells, 3,000 per gun
     Machine guns in deck mounts, 1913 Model
     4 x Single mounts on sides, evenly spread
      4 raised mounts
      Weight of broadside 574 lbs / 261 kg

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   2.36" / 60 mm   285.43 ft / 87.00 m   9.84 ft / 3.00 m
   Ends:   0.79" / 20 mm   108.23 ft / 32.99 m   9.84 ft / 3.00 m
     Main Belt covers 112 % of normal length

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   0.98" / 25 mm   0.20" / 5 mm      1.97" / 50 mm
   2nd:   0.39" / 10 mm   0.20" / 5 mm            -
   3rd:   0.20" / 5 mm         -               -

   - Protected deck - single deck:
   For and Aft decks: 1.57" / 40 mm
   Forecastle: 0.79" / 20 mm  Quarter deck: 0.79" / 20 mm

   - Conning towers: Forward 1.97" / 50 mm, Aft 0.00" / 0 mm

Machinery:
   Oil fired boilers, steam turbines,
   Electric motors, 2 shafts, 22,000 shp / 16,412 Kw = 25.84 kts
   Range 5,000nm at 10.00 kts
   Bunker at max displacement = 365 tons

Complement:
   218 - 284

Cost:
   £0.320 million / $1.282 million

Distribution of weights at normal displacement:
   Armament: 177 tons, 5.3 %
      - Guns: 177 tons, 5.3 %
   Armour: 628 tons, 18.9 %
      - Belts: 299 tons, 9.0 %
      - Armament: 16 tons, 0.5 %
      - Armour Deck: 303 tons, 9.1 %
      - Conning Tower: 9 tons, 0.3 %
   Machinery: 861 tons, 25.9 %
   Hull, fittings & equipment: 995 tons, 30.0 %
   Fuel, ammunition & stores: 329 tons, 9.9 %
   Miscellaneous weights: 330 tons, 9.9 %
      - Hull below water: 220 tons
      - Hull above water: 25 tons
      - On freeboard deck: 75 tons
      - Above deck: 10 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     3,099 lbs / 1,406 Kg = 37.0 x 5.5 " / 140 mm shells or 0.8 torpedoes
   Stability (Unstable if below 1.00): 1.23
   Metacentric height 1.8 ft / 0.5 m
   Roll period: 12.3 seconds
   Steadiness   - As gun platform (Average = 50 %): 50 %
         - Recoil effect (Restricted arc if above 1.00): 0.48
   Seaboat quality  (Average = 1.00): 1.12

Hull form characteristics:
   Hull has a flush deck,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0.571 / 0.576
   Length to Beam Ratio: 10.00 : 1
   'Natural speed' for length: 19.84 kts
   Power going to wave formation at top speed: 57 %
   Trim (Max stability = 0, Max steadiness = 100): 45
   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:   17.50 %,  15.58 ft / 4.75 m,  13.94 ft / 4.25 m
      - Forward deck:   40.00 %,  13.94 ft / 4.25 m,  13.94 ft / 4.25 m
      - Aft deck:   32.50 %,  13.94 ft / 4.25 m,  13.94 ft / 4.25 m
      - Quarter deck:   10.00 %,  13.94 ft / 4.25 m,  13.94 ft / 4.25 m
      - Average freeboard:      14.06 ft / 4.29 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 111.4 %
      - Above water (accommodation/working, high = better): 134.4 %
   Waterplane Area: 11,033 Square feet or 1,025 Square metres
   Displacement factor (Displacement / loading): 100 %
   Structure weight / hull surface area: 60 lbs/sq ft or 294 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.86
      - Longitudinal: 1.30
      - Overall: 0.90
   Cramped machinery, storage, compartmentation space
   Excellent accommodation and workspace room

Misc Distribution
--Below Water (220t)
----216t Electric Drives
----4t Additional Pumps
--Above Water (25t)
----15t Improved Crew Accommodations
----10t Improved Officer Accommodations
--On Deck (75t)
----18t 1912 Fire Control
----18t 6x530mm Torpedoes [One triple tube mount per side]
----25t Long Range Wireless
----10t Short Range Wireless
----4t Construction Reserve
--Above Deck (10t)
----5t Improved Acquisition Structures
----5t Additional Searchlights

[snip]

Something Im toying with for a follow on to the Respublica.

Jean de Arc, Imperial Roman Large Armored Cruiser laid down 1914

Displacement:
   27,842 t light; 29,328 t standard; 31,500 t normal; 33,237 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (702.12 ft / 685.70 ft) x 101.71 ft x (28.54 / 29.79 ft)
   (214.00 m / 209.00 m) x 31.00 m  x (8.70 / 9.08 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
     2 x Quad mounts on centreline ends, evenly spread
      20 - 5.51" / 140 mm 55.0 cal guns - 85.98lbs / 39.00kg shells, 175 per gun
     Quick firing guns in casemate mounts, 1909 Model
     20 x Single mounts on sides, aft evenly spread
      16 - 3.94" / 100 mm 45.0 cal guns - 30.86lbs / 14.00kg shells, 350 per gun
     Quick firing guns in deck and hoist mounts, 1909 Model
     8 x Twin mounts on sides, aft evenly spread
      8 raised mounts
      Weight of broadside 11,914 lbs / 5,404 kg

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   9.45" / 240 mm   445.70 ft / 135.85 m   18.04 ft / 5.50 m
   Ends:   1.97" / 50 mm   239.96 ft / 73.14 m   9.84 ft / 3.00 m
     Main Belt covers 100 % of normal length
     Main belt does not fully cover magazines and engineering spaces

   - Torpedo Bulkhead - Additional damage containing bulkheads:
      1.57" / 40 mm   445.70 ft / 135.85 m   28.54 ft / 8.70 m
   Beam between torpedo bulkheads 88.58 ft / 27.00 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      3.94" / 100 mm
   3rd:   0.98" / 25 mm   0.20" / 5 mm      1.97" / 50 mm

   - Armoured deck - single deck:
   For and Aft decks: 1.97" / 50 mm
   Forecastle: 0.59" / 15 mm  Quarter deck: 0.98" / 25 mm

   - Conning towers: Forward 9.45" / 240 mm, Aft 0.00" / 0 mm

Machinery:
   Oil fired boilers, steam turbines,
   Electric motors, 4 shafts, 128,001 shp / 95,488 Kw = 29.59 kts
   Range 7,000nm at 14.00 kts
   Bunker at max displacement = 3,909 tons

Complement:
   1,181 - 1,536

Cost:
   £3.461 million / $13.846 million

Distribution of weights at normal displacement:
   Armament: 2,155 tons, 6.8 %
      - Guns: 2,155 tons, 6.8 %
   Armour: 7,651 tons, 24.3 %
      - Belts: 3,452 tons, 11.0 %
      - Torpedo bulkhead: 741 tons, 2.4 %
      - Armament: 1,660 tons, 5.3 %
      - Armour Deck: 1,595 tons, 5.1 %
      - Conning Tower: 203 tons, 0.6 %
   Machinery: 4,931 tons, 15.7 %
   Hull, fittings & equipment: 10,895 tons, 34.6 %
   Fuel, ammunition & stores: 3,658 tons, 11.6 %
   Miscellaneous weights: 2,210 tons, 7.0 %
      - Hull below water: 1,350 tons
      - Hull above water: 200 tons
      - On freeboard deck: 600 tons
      - Above deck: 60 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     41,301 lbs / 18,734 Kg = 34.4 x 13.4 " / 340 mm shells or 5.6 torpedoes
   Stability (Unstable if below 1.00): 1.42
   Metacentric height 9.4 ft / 2.9 m
   Roll period: 13.9 seconds
   Steadiness   - As gun platform (Average = 50 %): 51 %
         - Recoil effect (Restricted arc if above 1.00): 0.32
   Seaboat quality  (Average = 1.00): 1.10

Hull form characteristics:
   Hull has rise forward of midbreak,
     a normal bow and a round stern
   Block coefficient (normal/deep): 0.554 / 0.560
   Length to Beam Ratio: 6.74 : 1
   'Natural speed' for length: 26.19 kts
   Power going to wave formation at top speed: 56 %
   Trim (Max stability = 0, Max steadiness = 100): 46
   Bow angle (Positive = bow angles forward): 20.00 degrees
   Stern overhang: 5.97 ft / 1.82 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
      - Forecastle:   20.00 %,  28.71 ft / 8.75 m,  28.71 ft / 8.75 m
      - Forward deck:   10.00 %,  28.71 ft / 8.75 m,  28.71 ft / 8.75 m
      - Aft deck:   55.00 %,  19.69 ft / 6.00 m,  19.69 ft / 6.00 m
      - Quarter deck:   15.00 %,  19.69 ft / 6.00 m,  19.69 ft / 6.00 m
      - Average freeboard:      22.39 ft / 6.83 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 100.3 %
      - Above water (accommodation/working, high = better): 166.0 %
   Waterplane Area: 48,847 Square feet or 4,538 Square metres
   Displacement factor (Displacement / loading): 106 %
   Structure weight / hull surface area: 174 lbs/sq ft or 852 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.95
      - Longitudinal: 1.49
      - Overall: 1.00
   Adequate machinery, storage, compartmentation space
   Excellent accommodation and workspace room

[The Rock Doctor]

Looks like the belt needs another metre or so of length.

That's a lot of miscellaneous weight...

[eltf177]

Looks like the belt needs another metre or so of length.

That's a lot of miscellaneous weight...

Agree, the belt can and should be fixed.

Electric Drives?

[snip]

Jean de Arc, Imperial Roman Large Armored Crusier laid down 1914

Displacement:
   27,842 t light; 29,328 t standard; 31,500 t normal; 33,237 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (702.12 ft / 685.70 ft) x 101.71 ft x (28.54 / 29.79 ft)
   (214.00 m / 209.00 m) x 31.00 m  x (8.70 / 9.08 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
     2 x Quad mounts on centreline ends, evenly spread
      20 - 5.51" / 140 mm 55.0 cal guns - 85.98lbs / 39.00kg shells, 175 per gun
     Quick firing guns in casemate mounts, 1909 Model
     20 x Single mounts on sides, aft evenly spread
      16 - 3.94" / 100 mm 45.0 cal guns - 30.86lbs / 14.00kg shells, 350 per gun
     Quick firing guns in deck and hoist mounts, 1909 Model
     8 x Twin mounts on sides, aft evenly spread
      8 raised mounts
      Weight of broadside 11,914 lbs / 5,404 kg

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   9.45" / 240 mm   445.70 ft / 135.85 m   18.04 ft / 5.50 m
   Ends:   1.97" / 50 mm   239.96 ft / 73.14 m   9.84 ft / 3.00 m
     Main Belt covers 100 % of normal length

   - Torpedo Bulkhead - Additional damage containing bulkheads:
      1.57" / 40 mm   445.70 ft / 135.85 m   28.54 ft / 8.70 m
   Beam between torpedo bulkheads 89.40 ft / 27.25 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      3.94" / 100 mm
   3rd:   0.98" / 25 mm   0.20" / 5 mm      1.97" / 50 mm

   - Armoured deck - single deck:
   For and Aft decks: 1.97" / 50 mm
   Forecastle: 0.59" / 15 mm  Quarter deck: 0.98" / 25 mm

   - Conning towers: Forward 9.45" / 240 mm, Aft 0.00" / 0 mm

Machinery:
   Oil fired boilers, steam turbines,
   Electric motors, 4 shafts, 128,001 shp / 95,488 Kw = 29.59 kts
   Range 7,000nm at 14.00 kts
   Bunker at max displacement = 3,909 tons

Complement:
   1,181 - 1,536

Cost:
   £3.461 million / $13.846 million

Distribution of weights at normal displacement:
   Armament: 2,155 tons, 6.8 %
      - Guns: 2,155 tons, 6.8 %
   Armour: 7,651 tons, 24.3 %
      - Belts: 3,452 tons, 11.0 %
      - Torpedo bulkhead: 741 tons, 2.4 %
      - Armament: 1,660 tons, 5.3 %
      - Armour Deck: 1,595 tons, 5.1 %
      - Conning Tower: 203 tons, 0.6 %
   Machinery: 4,931 tons, 15.7 %
   Hull, fittings & equipment: 10,895 tons, 34.6 %
   Fuel, ammunition & stores: 3,658 tons, 11.6 %
   Miscellaneous weights: 2,210 tons, 7.0 %
      - Hull below water: 1,350 tons
      - Hull above water: 200 tons
      - On freeboard deck: 600 tons
      - Above deck: 60 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     41,306 lbs / 18,736 Kg = 34.4 x 13.4 " / 340 mm shells or 5.6 torpedoes
   Stability (Unstable if below 1.00): 1.42
   Metacentric height 9.4 ft / 2.9 m
   Roll period: 13.9 seconds
   Steadiness   - As gun platform (Average = 50 %): 51 %
         - Recoil effect (Restricted arc if above 1.00): 0.32
   Seaboat quality  (Average = 1.00): 1.10

Hull form characteristics:
   Hull has rise forward of midbreak,
     a normal bow and a round stern
   Block coefficient (normal/deep): 0.554 / 0.560
   Length to Beam Ratio: 6.74 : 1
   'Natural speed' for length: 26.19 kts
   Power going to wave formation at top speed: 56 %
   Trim (Max stability = 0, Max steadiness = 100): 46
   Bow angle (Positive = bow angles forward): 20.00 degrees
   Stern overhang: 5.97 ft / 1.82 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
      - Forecastle:   20.00 %,  28.71 ft / 8.75 m,  28.71 ft / 8.75 m
      - Forward deck:   10.00 %,  28.71 ft / 8.75 m,  28.71 ft / 8.75 m
      - Aft deck:   55.00 %,  19.69 ft / 6.00 m,  19.69 ft / 6.00 m
      - Quarter deck:   15.00 %,  19.69 ft / 6.00 m,  19.69 ft / 6.00 m
      - Average freeboard:      22.39 ft / 6.83 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 99.4 %
      - Above water (accommodation/working, high = better): 166.0 %
   Waterplane Area: 48,847 Square feet or 4,538 Square metres
   Displacement factor (Displacement / loading): 106 %
   Structure weight / hull surface area: 174 lbs/sq ft or 852 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.95
      - Longitudinal: 1.49
      - Overall: 1.00
   Adequate machinery, storage, compartmentation space
   Excellent accommodation and workspace room

Yes, electric drives

[maddox]

You realise this is a Gascogned Dunkerque?

Not a bad job, this looks more balanced and 25 years earlier.

[snip]

You realise this is a Gascogned Dunkerque?

[snip]

Taking a look ahead to another 1914 design.

LRD-14A, Imperial Roman Destroyer laid down 1914

Displacement:
   1,500 t light; 1,569 t standard; 1,762 t normal; 1,916 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (354.32 ft / 344.49 ft) x 31.17 ft x (13.94 / 14.75 ft)
   (108.00 m / 105.00 m) x 9.50 m  x (4.25 / 4.50 m)

Armament:
      4 - 5.51" / 140 mm 55.0 cal guns - 85.98lbs / 39.00kg shells, 175 per gun
     Quick firing guns in deck mounts, 1909 Model
     3 x Single mounts on centreline ends, majority forward
      1 raised mount - superfiring
     1 x Single mount on centreline, aft deck forward
      1 raised mount aft
      2 - 1.77" / 45.0 mm 50.0 cal guns - 3.31lbs / 1.50kg shells, 250 per gun
     Quick firing guns in deck mounts, 1905 Model
     2 x Single mounts on sides, aft deck forward
      2 raised mounts
      4 - 0.26" / 6.5 mm 110.0 cal guns - 0.01lbs / 0.00kg shells, 5,000 per gun
     Machine guns in deck mounts, 1911 Model
     4 x Single mounts on sides, evenly spread
      4 raised mounts
      Weight of broadside 351 lbs / 159 kg

Armour:
   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   0.59" / 15 mm   0.39" / 10 mm            -

Machinery:
   Oil fired boilers, steam turbines,
   Direct drive, 2 shafts, 36,000 shp / 26,856 Kw = 32.25 kts
   Range 3,500nm at 14.00 kts
   Bunker at max displacement = 347 tons

Complement:
   135 - 176

Cost:
   £0.268 million / $1.074 million

Distribution of weights at normal displacement:
   Armament: 78 tons, 4.4 %
      - Guns: 78 tons, 4.4 %
   Armour: 12 tons, 0.7 %
      - Armament: 12 tons, 0.7 %
   Machinery: 978 tons, 55.5 %
   Hull, fittings & equipment: 402 tons, 22.8 %
   Fuel, ammunition & stores: 262 tons, 14.9 %
   Miscellaneous weights: 30 tons, 1.7 %
      - On freeboard deck: 30 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     377 lbs / 171 Kg = 4.5 x 5.5 " / 140 mm shells or 0.2 torpedoes
   Stability (Unstable if below 1.00): 1.29
   Metacentric height 1.4 ft / 0.4 m
   Roll period: 11.2 seconds
   Steadiness   - As gun platform (Average = 50 %): 70 %
         - Recoil effect (Restricted arc if above 1.00): 0.44
   Seaboat quality  (Average = 1.00): 1.09

Hull form characteristics:
   Hull has rise forward of midbreak,
     a normal bow and a round stern
   Block coefficient (normal/deep): 0.412 / 0.423
   Length to Beam Ratio: 11.05 : 1
   'Natural speed' for length: 18.56 kts
   Power going to wave formation at top speed: 65 %
   Trim (Max stability = 0, Max steadiness = 100): 64
   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:   10.00 %,  21.33 ft / 6.50 m,  19.69 ft / 6.00 m
      - Forward deck:   15.00 %,  19.69 ft / 6.00 m,  19.69 ft / 6.00 m
      - Aft deck:   60.00 %,  11.48 ft / 3.50 m,  11.48 ft / 3.50 m
      - Quarter deck:   15.00 %,  11.48 ft / 3.50 m,  11.48 ft / 3.50 m
      - Average freeboard:      13.60 ft / 4.15 m

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 191.3 %
      - Above water (accommodation/working, high = better): 123.3 %
   Waterplane Area: 6,660 Square feet or 619 Square metres
   Displacement factor (Displacement / loading): 58 %
   Structure weight / hull surface area: 32 lbs/sq ft or 157 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.50
      - Longitudinal: 1.82
      - Overall: 0.57
   Cramped machinery, storage, compartmentation space
   Excellent accommodation and workspace room
   Ship has slow, easy roll, a good, steady gun platform

[Guinness]

This feels like a case of NEDS to me. A gun as large as 14cm needs a fair amount of deck space to work. Also handing up that ammunition won't be much fun. A full round with its propellant is going to be in excess of 49 kg (or almost 110 lbs for those of us who are less enlightened). How many torpedo tubes does this have?

LRD-14A, Imperial Roman Destroyer laid down 1914

[TacCovert4]

I'd make a comment about 14cm, but then I've been looking at the same thing at the same time.

[Kaiser Kirk]

Parthia just started work on 130mm, as they figure that's about the reasonable limit.
It's 20% heavier than their 120mm, which they hope will be sufficient for these new giant destroyers folks have.

[snip]

This feels like a case of NEDS to me. A gun as large as 14cm needs a fair amount of deck space to work. Also handing up that ammunition won't be much fun. A full round with its propellant is going to be in excess of 49 kg (or almost 110 lbs for those of us who are less enlightened). How many torpedo tubes does this have?

LRD-14A, Imperial Roman Destroyer laid down 1914

The layout is basicly that of the Bourrasque Class, but with the B mount shifted to a Q position & 5.5m longer. Sure, my guns are 140s rather than 130s. The Romans have been using 140mm guns with the 39kg shell for almost 10 years, so the teething problems will be more to do with using said guns on a DD. Some of that work has already been done on the G-Class, which mounted 3 of these weapons. Planned fish 2x3 530mm centerline.

Parthia just started work on 130mm, as they figure that's about the reasonable limit.
It's 20% heavier than their 120mm, which they hope will be sufficient for these new giant destroyers folks have.

With the guns I have, its ether single 140s or twin 100s. The 100s feel a little light for a ship of this size.

[snip]

And I just realized that I misread the 130mm the Bourrasque actually carried. So the nearest comparison would be the Guepards, which Im shorter than but mount one less gun.

[snip]

For giggles, the 8x100mm version. Gets hoists in exchange for 2000shp (~.4 knts)

LRD-14B, Imperial Roman Destroyer laid down 1914

Displacement:
   1,500 t light; 1,567 t standard; 1,760 t normal; 1,914 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (354.32 ft / 344.49 ft) x 31.17 ft x (13.94 / 14.75 ft)
   (108.00 m / 105.00 m) x 9.50 m  x (4.25 / 4.50 m)

Armament:
      8 - 3.94" / 100 mm 45.0 cal guns - 30.86lbs / 14.00kg shells, 225 per gun
     Quick firing guns in deck and hoist mounts, 1909 Model
     3 x Twin mounts on centreline ends, majority forward
      1 raised mount - superfiring
     1 x Twin mount on centreline, aft deck forward
      1 raised mount aft
      2 - 1.77" / 45.0 mm 50.0 cal guns - 3.31lbs / 1.50kg shells, 250 per gun
     Quick firing guns in deck mounts, 1905 Model
     2 x Single mounts on sides, aft deck forward
      2 raised mounts
      4 - 0.26" / 6.5 mm 110.0 cal guns - 0.01lbs / 0.00kg shells, 5,000 per gun
     Machine guns in deck mounts, 1911 Model
     4 x Single mounts on sides, evenly spread
      4 raised mounts
      Weight of broadside 254 lbs / 115 kg

Armour:
   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   0.59" / 15 mm   0.20" / 5 mm      0.39" / 10 mm
   2nd:   0.20" / 5 mm         -               -
   3rd:   0.20" / 5 mm         -               -

Machinery:
   Oil fired boilers, steam turbines,
   Direct drive, 2 shafts, 34,000 shp / 25,364 Kw = 31.82 kts
   Range 3,500nm at 14.00 kts
   Bunker at max displacement = 347 tons

Complement:
   135 - 176

Cost:
   £0.267 million / $1.067 million

Distribution of weights at normal displacement:
   Armament: 56 tons, 3.2 %
      - Guns: 56 tons, 3.2 %
   Armour: 10 tons, 0.6 %
      - Armament: 10 tons, 0.6 %
   Machinery: 948 tons, 53.9 %
   Hull, fittings & equipment: 451 tons, 25.6 %
   Fuel, ammunition & stores: 260 tons, 14.8 %
   Miscellaneous weights: 35 tons, 2.0 %
      - On freeboard deck: 35 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     382 lbs / 173 Kg = 12.5 x 3.9 " / 100 mm shells or 0.2 torpedoes
   Stability (Unstable if below 1.00): 1.22
   Metacentric height 1.2 ft / 0.4 m
   Roll period: 11.7 seconds
   Steadiness   - As gun platform (Average = 50 %): 61 %
         - Recoil effect (Restricted arc if above 1.00): 0.62
   Seaboat quality  (Average = 1.00): 1.06

Hull form characteristics:
   Hull has rise forward of midbreak,
     a normal bow and a round stern
   Block coefficient (normal/deep): 0.411 / 0.423
   Length to Beam Ratio: 11.05 : 1
   'Natural speed' for length: 18.56 kts
   Power going to wave formation at top speed: 64 %
   Trim (Max stability = 0, Max steadiness = 100): 58
   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:   10.00 %,  21.33 ft / 6.50 m,  19.69 ft / 6.00 m
      - Forward deck:   15.00 %,  19.69 ft / 6.00 m,  19.69 ft / 6.00 m
      - Aft deck:   60.00 %,  11.48 ft / 3.50 m,  11.48 ft / 3.50 m
      - Quarter deck:   15.00 %,  11.48 ft / 3.50 m,  11.48 ft / 3.50 m
      - Average freeboard:      13.60 ft / 4.15 m

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 187.3 %
      - Above water (accommodation/working, high = better): 123.2 %
   Waterplane Area: 6,655 Square feet or 618 Square metres
   Displacement factor (Displacement / loading): 61 %
   Structure weight / hull surface area: 34 lbs/sq ft or 166 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.50
      - Longitudinal: 1.76
      - Overall: 0.57
   Cramped machinery, storage, compartmentation space
   Excellent accommodation and workspace room