DD-E Class

[TacCovert4]

DD-E, Aztec Destroyer-Cruiser laid down 1918

Displacement:
   1,500 t light; 1,567 t standard; 1,844 t normal; 2,065 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (391.10 ft / 387.14 ft) x 32.32 ft x (12.23 / 13.22 ft)
   (119.21 m / 118.00 m) x 9.85 m  x (3.73 / 4.03 m)

Armament:
      6 - 3.94" / 100 mm 50.0 cal guns - 32.30lbs / 14.65kg shells, 250 per gun
     Quick firing guns in deck mounts, 1918 Model
     3 x Twin mounts on centreline ends, majority aft
      1 raised mount aft - superfiring
      1 - 2.76" / 70.0 mm 50.0 cal gun - 11.09lbs / 5.03kg shells, 300 per gun
     Anti-air gun in deck mount, 1918 Model
     1 x Single mount on centreline, forward deck centre
      1 raised mount
      12 - 0.47" / 12.0 mm 70.0 cal guns - 0.07lbs / 0.03kg shells, 3,000 per gun
     Machine guns in deck mounts, 1918 Model
     12 x Single mounts on sides, evenly spread
      Weight of broadside 206 lbs / 93 kg

Armour:
   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   1.06" / 27 mm         -               -

   - Box over magazines:
   1.06" / 27 mm

   - Conning towers: Forward 1.06" / 27 mm, Aft 0.00" / 0 mm

Machinery:
   Oil fired boilers, steam turbines,
   Direct drive, 2 shafts, 33,396 shp / 24,913 Kw = 32.00 kts
   Range 12,000nm at 10.00 kts
   Bunker at max displacement = 497 tons

Complement:
   139 - 182

Cost:
   £0.398 million / $1.592 million

Distribution of weights at normal displacement:
   Armament: 35 tons, 1.9 %
      - Guns: 35 tons, 1.9 %
   Armour: 25 tons, 1.4 %
      - Armament: 7 tons, 0.4 %
      - Armour Deck: 14 tons, 0.8 %
      - Conning Tower: 3 tons, 0.2 %
   Machinery: 965 tons, 52.3 %
   Hull, fittings & equipment: 397 tons, 21.5 %
   Fuel, ammunition & stores: 343 tons, 18.6 %
   Miscellaneous weights: 79 tons, 4.3 %
      - Hull above water: 28 tons
      - On freeboard deck: 24 tons
      - Above deck: 27 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     439 lbs / 199 Kg = 14.4 x 3.9 " / 100 mm shells or 0.3 torpedoes
   Stability (Unstable if below 1.00): 1.30
   Metacentric height 1.5 ft / 0.4 m
   Roll period: 11.2 seconds
   Steadiness   - As gun platform (Average = 50 %): 70 %
         - Recoil effect (Restricted arc if above 1.00): 0.21
   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): 0.422 / 0.437
   Length to Beam Ratio: 11.98 : 1
   'Natural speed' for length: 19.68 kts
   Power going to wave formation at top speed: 61 %
   Trim (Max stability = 0, Max steadiness = 100): 68
   Bow angle (Positive = bow angles forward): 15.00 degrees
   Stern overhang: 0.00 ft / 0.00 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
      - Forecastle:   20.00 %,  14.76 ft / 4.50 m,  13.78 ft / 4.20 m
      - Forward deck:   30.00 %,  13.78 ft / 4.20 m,  13.12 ft / 4.00 m
      - Aft deck:   35.00 %,  13.12 ft / 4.00 m,  9.84 ft / 3.00 m
      - Quarter deck:   15.00 %,  9.84 ft / 3.00 m,  9.84 ft / 3.00 m
      - Average freeboard:      12.37 ft / 3.77 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 177.5 %
      - Above water (accommodation/working, high = better): 132.6 %
   Waterplane Area: 7,809 Square feet or 725 Square metres
   Displacement factor (Displacement / loading): 70 %
   Structure weight / hull surface area: 29 lbs/sq ft or 142 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.50
      - Longitudinal: 0.89
      - Overall: 0.53
   Cramped machinery, storage, compartmentation space
   Excellent accommodation and workspace room
   Ship has slow, easy roll, a good, steady gun platform

4t - 1912 FC

25t - LR Radio

24t - 2 x 3 x 18in TT on Centerline, 2 x Reload Salvo

14t - Crew Comfort Improvements

12t - Additional Pumps and DC Equipment

Trial Speed - 32.65kts