Divodurum Class Cruisers

[snip]

The first turbine cruisers, the Divodurum class fixes some of the crowding issues of the Ovilava's as well as a major increase in speed.

Four Ships:
--IRS Divodurum (Sunk August 1914)
--IRS Vesontio
--IRS Cularo (Sunk July 1914)
--IRS Divio (Sunk July 1914)

Divodurum, Imperial Roman Republic Cruiser laid down 1904

Displacement:
   5,000 t light; 5,209 t standard; 5,847 t normal; 6,357 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (364.17 ft / 360.89 ft) x 54.13 ft x (20.51 / 21.86 ft)
   (111.00 m / 110.00 m) x 16.50 m  x (6.25 / 6.66 m)

Armament:
      8 - 5.51" / 140 mm 50.0 cal guns - 85.98lbs / 39.00kg shells, 200 per gun
     Quick firing guns in deck and hoist mounts, 1902 Model
     4 x Single mounts on centreline ends, evenly spread
     6 x Single mounts on sides, evenly spread
      6 - 2.95" / 75.0 mm 50.0 cal guns - 13.23lbs / 6.00kg shells, 350 per gun
     Quick firing guns in deck and hoist mounts, 1902 Model
     2 x Single mounts on centreline ends, evenly spread
      2 raised mounts
     4 x Single mounts on sides, evenly spread
      4 raised mounts
      Weight of broadside 767 lbs / 348 kg

Armour:
   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   1.57" / 40 mm   0.39" / 10 mm      1.57" / 40 mm
   2nd:   0.59" / 15 mm   0.20" / 5 mm      1.57" / 40 mm

   - Protected deck - single deck:
   For and Aft decks: 2.76" / 70 mm
   Forecastle: 1.18" / 30 mm  Quarter deck: 1.18" / 30 mm

   - Conning towers: Forward 2.95" / 75 mm, Aft 0.00" / 0 mm

Machinery:
   Coal and oil fired boilers, steam turbines,
   Direct drive, 2 shafts, 26,503 shp / 19,771 Kw = 24.40 kts
   Range 5,500nm at 10.00 kts
   Bunker at max displacement = 1,148 tons (90% coal)

Complement:
   333 - 434

Cost:
   £0.626 million / $2.505 million

Distribution of weights at normal displacement:
   Armament: 237 tons, 4.1 %
      - Guns: 237 tons, 4.1 %
   Armour: 675 tons, 11.5 %
      - Armament: 51 tons, 0.9 %
      - Armour Deck: 604 tons, 10.3 %
      - Conning Tower: 21 tons, 0.4 %
   Machinery: 2,624 tons, 44.9 %
   Hull, fittings & equipment: 1,349 tons, 23.1 %
   Fuel, ammunition & stores: 847 tons, 14.5 %
   Miscellaneous weights: 115 tons, 2.0 %
      - Hull below water: 5 tons
      - Hull above water: 40 tons
      - On freeboard deck: 55 tons
      - Above deck: 15 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     2,461 lbs / 1,116 Kg = 29.4 x 5.5 " / 140 mm shells or 0.6 torpedoes
   Stability (Unstable if below 1.00): 1.41
   Metacentric height 3.6 ft / 1.1 m
   Roll period: 11.9 seconds
   Steadiness   - As gun platform (Average = 50 %): 70 %
         - Recoil effect (Restricted arc if above 1.00): 0.23
   Seaboat quality  (Average = 1.00): 1.02

Hull form characteristics:
   Hull has low quarterdeck ,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0.511 / 0.521
   Length to Beam Ratio: 6.67 : 1
   'Natural speed' for length: 19.00 kts
   Power going to wave formation at top speed: 61 %
   Trim (Max stability = 0, Max steadiness = 100): 69
   Bow angle (Positive = bow angles forward): 10.00 degrees
   Stern overhang: 0.52 ft / 0.16 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:   30.00 %,  15.58 ft / 4.75 m,  15.58 ft / 4.75 m
      - Aft deck:   35.00 %,  15.58 ft / 4.75 m,  15.58 ft / 4.75 m
      - Quarter deck:   15.00 %,  6.56 ft / 2.00 m,  6.56 ft / 2.00 m
      - Average freeboard:      14.23 ft / 4.34 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 159.5 %
      - Above water (accommodation/working, high = better): 117.2 %
   Waterplane Area: 13,147 Square feet or 1,221 Square metres
   Displacement factor (Displacement / loading): 86 %
   Structure weight / hull surface area: 72 lbs/sq ft or 354 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.83
      - Longitudinal: 1.83
      - Overall: 0.90
   Caution: Hull subject to strain in open-sea
   Cramped machinery, storage, compartmentation space
   Adequate accommodation and workspace room
   Ship has slow, easy roll, a good, steady gun platform

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 (55t)
----16t 8x450mm Torpedos (45 Pattern A)
----25t Long-Range Wireless
----4t Improved Torpedo Handling Equipment
----5t Additional Officer accommodations
----5t Construction Reserve
--Above Deck (15t)
----10t Improved Aquisition Structures
----5t Additional Searchlights

[snip]

In 1914H1, all four of these ships were refit with 1912 Fire Control. Their torpedo tubes were removed to accommodate this.

IRS Divodurum was sunk in this configuration at the Battle of Ironclad Bay, while IRS Cularo and IRS Divio were sunk in this configuration at Grand Turk.

Divodurum, Imperial Roman Republic Cruiser laid down 1904

Displacement:
   5,000 t light; 5,209 t standard; 5,847 t normal; 6,357 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (364.17 ft / 360.89 ft) x 54.13 ft x (20.51 / 21.86 ft)
   (111.00 m / 110.00 m) x 16.50 m  x (6.25 / 6.66 m)

Armament:
      8 - 5.51" / 140 mm 50.0 cal guns - 85.98lbs / 39.00kg shells, 200 per gun
     Quick firing guns in deck and hoist mounts, 1902 Model
     4 x Single mounts on centreline ends, evenly spread
     6 x Single mounts on sides, evenly spread
      6 - 2.95" / 75.0 mm 50.0 cal guns - 13.23lbs / 6.00kg shells, 350 per gun
     Quick firing guns in deck and hoist mounts, 1902 Model
     2 x Single mounts on centreline ends, evenly spread
      2 raised mounts
     4 x Single mounts on sides, evenly spread
      4 raised mounts
      Weight of broadside 767 lbs / 348 kg

Armour:
   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   1.57" / 40 mm   0.39" / 10 mm      1.57" / 40 mm
   2nd:   0.59" / 15 mm   0.20" / 5 mm      1.57" / 40 mm

   - Protected deck - single deck:
   For and Aft decks: 2.76" / 70 mm
   Forecastle: 1.18" / 30 mm  Quarter deck: 1.18" / 30 mm

   - Conning towers: Forward 2.95" / 75 mm, Aft 0.00" / 0 mm

Machinery:
   Coal and oil fired boilers, steam turbines,
   Direct drive, 2 shafts, 26,503 shp / 19,771 Kw = 24.40 kts
   Range 5,500nm at 10.00 kts
   Bunker at max displacement = 1,148 tons (90% coal)

Complement:
   333 - 434

Cost:
   £0.626 million / $2.505 million

Distribution of weights at normal displacement:
   Armament: 237 tons, 4.1 %
      - Guns: 237 tons, 4.1 %
   Armour: 675 tons, 11.5 %
      - Armament: 51 tons, 0.9 %
      - Armour Deck: 604 tons, 10.3 %
      - Conning Tower: 21 tons, 0.4 %
   Machinery: 2,624 tons, 44.9 %
   Hull, fittings & equipment: 1,349 tons, 23.1 %
   Fuel, ammunition & stores: 847 tons, 14.5 %
   Miscellaneous weights: 115 tons, 2.0 %
      - Hull below water: 5 tons
      - Hull above water: 40 tons
      - On freeboard deck: 55 tons
      - Above deck: 15 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     2,461 lbs / 1,116 Kg = 29.4 x 5.5 " / 140 mm shells or 0.6 torpedoes
   Stability (Unstable if below 1.00): 1.41
   Metacentric height 3.6 ft / 1.1 m
   Roll period: 11.9 seconds
   Steadiness   - As gun platform (Average = 50 %): 70 %
         - Recoil effect (Restricted arc if above 1.00): 0.23
   Seaboat quality  (Average = 1.00): 1.02

Hull form characteristics:
   Hull has low quarterdeck ,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0.511 / 0.521
   Length to Beam Ratio: 6.67 : 1
   'Natural speed' for length: 19.00 kts
   Power going to wave formation at top speed: 61 %
   Trim (Max stability = 0, Max steadiness = 100): 69
   Bow angle (Positive = bow angles forward): 10.00 degrees
   Stern overhang: 0.52 ft / 0.16 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:   30.00 %,  15.58 ft / 4.75 m,  15.58 ft / 4.75 m
      - Aft deck:   35.00 %,  15.58 ft / 4.75 m,  15.58 ft / 4.75 m
      - Quarter deck:   15.00 %,  6.56 ft / 2.00 m,  6.56 ft / 2.00 m
      - Average freeboard:      14.23 ft / 4.34 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 159.5 %
      - Above water (accommodation/working, high = better): 117.2 %
   Waterplane Area: 13,147 Square feet or 1,221 Square metres
   Displacement factor (Displacement / loading): 86 %
   Structure weight / hull surface area: 72 lbs/sq ft or 354 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.83
      - Longitudinal: 1.83
      - Overall: 0.90
   Caution: Hull subject to strain in open-sea
   Cramped machinery, storage, compartmentation space
   Adequate accommodation and workspace room
   Ship has slow, easy roll, a good, steady gun platform

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 (55t)
----24t 1912 Fire Control
----25t Long-Range Wireless
----5t Additional Officer accommodations
----1t Construction Reserve
--Above Deck (15t)
----10t Improved Aquisition Structures
----5t Additional Searchlights