www.navalism.org

Two Ships
--IRS Cardinal Richelieu
--IRS Gaius Duillius

QuoteACV-24, Imperial Roman Republic Aircraft Carrier laid down 1924

Displacement:
   11,000 t light; 11,324 t standard; 12,692 t normal; 13,786 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (623.36 ft / 606.96 ft) x 70.54 ft x (18.86 / 20.15 ft)
   (190.00 m / 185.00 m) x 21.50 m  x (5.75 / 6.14 m)

Armament:
      8 - 5.51" / 140 mm 40.0 cal guns - 85.98lbs / 39.00kg shells, 175 per gun
     Quick firing guns in deck and hoist mounts, 1917 Model
     8 x Single mounts on side ends, evenly spread
      2 - 3.94" / 100 mm 45.0 cal guns - 30.86lbs / 14.00kg shells, 100 per gun
     Anti-air guns in deck mounts, 1915 Model
     2 x Single mounts on sides, forward deck aft
      2 raised mounts
      Weight of broadside 750 lbs / 340 kg

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   3.15" / 80 mm   394.52 ft / 120.25 m   16.40 ft / 5.00 m
   Ends:   Unarmoured
     Main Belt covers 100 % of normal length

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

   - Armoured deck - single deck:
   For and Aft decks: 1.18" / 30 mm
   Forecastle: 0.00" / 0 mm  Quarter deck: 1.18" / 30 mm

Machinery:
   Oil fired boilers, steam turbines,
   Geared drive, 2 shafts, 40,000 shp / 29,840 Kw = 25.26 kts
   Range 10,000nm at 14.00 kts
   Bunker at max displacement = 2,462 tons

Complement:
   597 - 777

Cost:
   £1.937 million / $7.746 million

Distribution of weights at normal displacement:
   Armament: 164 tons, 1.3 %
      - Guns: 164 tons, 1.3 %
   Armour: 1,468 tons, 11.6 %
      - Belts: 852 tons, 6.7 %
      - Armament: 16 tons, 0.1 %
      - Armour Deck: 600 tons, 4.7 %
   Machinery: 1,318 tons, 10.4 %
   Hull, fittings & equipment: 4,870 tons, 38.4 %
   Fuel, ammunition & stores: 1,692 tons, 13.3 %
   Miscellaneous weights: 3,180 tons, 25.1 %
      - Hull below water: 1,500 tons
      - Hull above water: 1,550 tons
      - On freeboard deck: 100 tons
      - Above deck: 30 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     32,692 lbs / 14,829 Kg = 390.5 x 5.5 " / 140 mm shells or 3.3 torpedoes
   Stability (Unstable if below 1.00): 1.26
   Metacentric height 4.5 ft / 1.4 m
   Roll period: 14.0 seconds
   Steadiness   - As gun platform (Average = 50 %): 80 %
         - Recoil effect (Restricted arc if above 1.00): 0.16
   Seaboat quality  (Average = 1.00): 2.00

Hull form characteristics:
   Hull has a flush deck,
     a normal bow and a round stern
   Block coefficient (normal/deep): 0.550 / 0.559
   Length to Beam Ratio: 8.60 : 1
   'Natural speed' for length: 24.64 kts
   Power going to wave formation at top speed: 46 %
   Trim (Max stability = 0, Max steadiness = 100): 40
   Bow angle (Positive = bow angles forward): 15.00 degrees
   Stern overhang: 8.50 ft / 2.59 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
      - Forecastle:   20.00 %,  29.53 ft / 9.00 m,  29.53 ft / 9.00 m
      - Forward deck:   30.00 %,  29.53 ft / 9.00 m,  29.53 ft / 9.00 m
      - Aft deck:   35.00 %,  29.53 ft / 9.00 m,  29.53 ft / 9.00 m
      - Quarter deck:   15.00 %,  29.53 ft / 9.00 m,  29.53 ft / 9.00 m
      - Average freeboard:      29.53 ft / 9.00 m

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 65.1 %
      - Above water (accommodation/working, high = better): 281.5 %
   Waterplane Area: 29,879 Square feet or 2,776 Square metres
   Displacement factor (Displacement / loading): 162 %
   Structure weight / hull surface area: 94 lbs/sq ft or 461 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.89
      - Longitudinal: 2.80
      - Overall: 1.00
   Excellent machinery, storage, compartmentation space
   Excellent accommodation and workspace room
   Ship has slow, easy roll, a good, steady gun platform
   Excellent seaboat, comfortable, can fire her guns in the heaviest weather

Airgroup of 36 Planes (Pre 1933 tech)

Misc Weight Distribution
-Below Water (1500t)
--1440t Airgroup
--30t Additional Pumps
--30t Improved Damage Control Equipment
-Above Water (1550t)
--1440t Airgroup
--25t LR Wireless
--50t Improved Damage Control Equipment
--30t Enhanced Ventilation and Crew Comfort
--5t Construction Reserve
-On Deck (100t)
--17t 1918 Fire Control
--50t Enhanced Ventilation and Crew Comfort
--20t Improved Damage Control Equipment
--10t Short Range Wireless
--3t Construction Reserve
-Above Deck (30t)
--10t Additional Optical Spotting Equipment
--10t Night Fighting Equipment
--5t Improved Signaling Equipment
--5t Smoke Diversion Equipment