Emperor Hadrian IX class Battleship

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Representing the adoption of the conventional twin main battery turrets, the Emperor Hadrian IX class provides a major increase in firepower over the Gloriosum class. Like the Gloriosum, the Hadrian IX's maintain some vestiges of their coastal defense ship heritage. They also have trouble maintaining 18knts in all but ideal conditions.

Ships in Class: Two
--IRS Emperor Hadrian IX
--IRS Lucidum

Emperor Hadrian IX, Imperial Roman Republic Battleship laid down 1893

Displacement:
   13,500 t light; 14,129 t standard; 15,044 t normal; 15,776 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (400.26 ft / 393.70 ft) x 78.74 ft x (26.25 / 27.33 ft)
   (122.00 m / 120.00 m) x 24.00 m  x (8.00 / 8.33 m)

Armament:
      4 - 13.39" / 340 mm 35.0 cal guns - 1,124.36lbs / 510.00kg shells, 70 per gun
     Breech loading guns in turret on barbette mounts, 1893 Model
     2 x Twin mounts on centreline ends, evenly spread
      4 - 8.27" / 210 mm 40.0 cal guns - 242.51lbs / 110.00kg shells, 100 per gun
     Breech loading guns in turret on barbette mounts, 1893 Model
     4 x Single mounts on sides, evenly spread
      10 - 5.51" / 140 mm 40.0 cal guns - 79.37lbs / 36.00kg shells, 175 per gun
     Breech loading guns in casemate mounts, 1890 Model
     10 x Single mounts on sides, evenly spread
      10 hull mounts in casemates- Limited use in heavy seas
      12 - 2.95" / 75.0 mm 45.0 cal guns - 13.23lbs / 6.00kg shells, 250 per gun
     Breech loading guns in deck mounts, 1890 Model
     12 x Single mounts on sides, evenly spread
      6 raised mounts
      Weight of broadside 6,420 lbs / 2,912 kg

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   11.8" / 300 mm   231.73 ft / 70.63 m   12.30 ft / 3.75 m
   Ends:   5.91" / 150 mm   161.94 ft / 49.36 m   9.84 ft / 3.00 m
   Upper:   3.94" / 100 mm   231.73 ft / 70.63 m   8.20 ft / 2.50 m
     Main Belt covers 91 % of normal length

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   15.0" / 380 mm   9.84" / 250 mm      13.4" / 340 mm
   2nd:   5.91" / 150 mm   3.94" / 100 mm      5.91" / 150 mm
   3rd:   3.94" / 100 mm   0.98" / 25 mm      3.94" / 100 mm
   4th:   0.59" / 15 mm         -               -

   - Armoured deck - multiple decks:
   For and Aft decks: 1.97" / 50 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:
   Coal fired boilers, simple reciprocating steam engines,
   Direct drive, 2 shafts, 15,000 ihp / 11,190 Kw = 18.06 kts
   Range 4,500nm at 10.00 kts
   Bunker at max displacement = 1,647 tons (100% coal)

Complement:
   678 - 882

Cost:
   £1.327 million / $5.308 million

Distribution of weights at normal displacement:
   Armament: 1,005 tons, 6.7 %
      - Guns: 1,005 tons, 6.7 %
   Armour: 4,746 tons, 31.5 %
      - Belts: 2,291 tons, 15.2 %
      - Armament: 1,561 tons, 10.4 %
      - Armour Deck: 765 tons, 5.1 %
      - Conning Tower: 129 tons, 0.9 %
   Machinery: 2,830 tons, 18.8 %
   Hull, fittings & equipment: 4,724 tons, 31.4 %
   Fuel, ammunition & stores: 1,544 tons, 10.3 %
   Miscellaneous weights: 195 tons, 1.3 %
      - Hull below water: 25 tons
      - Hull above water: 100 tons
      - On freeboard deck: 50 tons
      - Above deck: 20 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     17,859 lbs / 8,101 Kg = 14.9 x 13.4 " / 340 mm shells or 2.1 torpedoes
   Stability (Unstable if below 1.00): 1.34
   Metacentric height 5.9 ft / 1.8 m
   Roll period: 13.7 seconds
   Steadiness   - As gun platform (Average = 50 %): 70 %
         - Recoil effect (Restricted arc if above 1.00): 0.51
   Seaboat quality  (Average = 1.00): 1.48

Hull form characteristics:
   Hull has low quarterdeck ,
     a ram bow and a cruiser stern
   Block coefficient (normal/deep): 0.647 / 0.652
   Length to Beam Ratio: 5.00 : 1
   'Natural speed' for length: 19.84 kts
   Power going to wave formation at top speed: 51 %
   Trim (Max stability = 0, Max steadiness = 100): 47
   Bow angle (Positive = bow angles forward): -15.00 degrees
   Stern overhang: -8.20 ft / -2.50 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
      - Forecastle:   20.57 %,  18.86 ft / 5.75 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:   28.86 %,  18.86 ft / 5.75 m,  18.86 ft / 5.75 m
      - Quarter deck:   20.57 %,  9.84 ft / 3.00 m,  9.84 ft / 3.00 m
      - Average freeboard:      17.01 ft / 5.18 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 90.1 %
      - Above water (accommodation/working, high = better): 125.5 %
   Waterplane Area: 23,683 Square feet or 2,200 Square metres
   Displacement factor (Displacement / loading): 101 %
   Structure weight / hull surface area: 155 lbs/sq ft or 759 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.90
      - Longitudinal: 2.55
      - Overall: 1.00
   Adequate machinery, storage, compartmentation space
   Excellent accommodation and workspace room
   Ship has slow, easy roll, a good, steady gun platform
   Good seaboat, rides out heavy weather easily

Misc Distribution
--Below Water (25t)
----18t 12x350mm Torpedos (35 Pattern A)
----2t Additional Torpedo Handing Equipment
----5t Additional Pumps
--Above Water(100t)
----30t Flag Facilities
----30t Additional Troop Accommodations
----10t Improved Officer Accommodations
----20t Improved Crew Accommodations
----10t Construction Reserve
--On Deck (50t)
----30t Flag Facilities
----10t Admiralty Accommodations
----10t Construction Reserve
--Above Deck (20t)
----15t Improved Aquisition Structures
----5t Additional Searchlights