DD-K Class

[TacCovert4]

DD-K, Aztec Destroyer laid down 1927

Displacement:
   1,466 t light; 1,539 t standard; 1,741 t normal; 1,902 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (382.13 ft / 377.30 ft) x 32.81 ft x (9.84 / 10.53 ft)
   (116.47 m / 115.00 m) x 10.00 m  x (3.00 / 3.21 m)

Armament:
      4 - 5.12" / 130 mm 50.0 cal guns - 70.97lbs / 32.19kg shells, 200 per gun
     Quick firing guns in deck mounts, 1927 Model
     4 x Single mounts on centreline ends, evenly spread
      2 raised mounts - superfiring
      12 - 1.18" / 30.0 mm 50.0 cal guns - 0.87lbs / 0.40kg shells, 1,000 per gun
     Anti-air guns in deck mounts, 1927 Model
     12 x Single mounts on sides, evenly spread
      Weight of broadside 294 lbs / 134 kg

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

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

Machinery:
   Oil fired boilers, steam turbines,
   Geared drive, 2 shafts, 35,554 shp / 26,524 Kw = 32.25 kts
   Range 5,000nm at 14.00 kts
   Bunker at max displacement = 363 tons

Complement:
   134 - 175

Cost:
   £0.696 million / $2.785 million

Distribution of weights at normal displacement:
   Armament: 58 tons, 3.4 %
      - Guns: 58 tons, 3.4 %
   Armour: 32 tons, 1.9 %
      - Armament: 29 tons, 1.7 %
      - Conning Tower: 3 tons, 0.2 %
   Machinery: 887 tons, 51.0 %
   Hull, fittings & equipment: 421 tons, 24.2 %
   Fuel, ammunition & stores: 274 tons, 15.7 %
   Miscellaneous weights: 67 tons, 3.8 %
      - Hull below water: 15 tons
      - On freeboard deck: 44 tons
      - Above deck: 8 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     502 lbs / 228 Kg = 7.5 x 5.1 " / 130 mm shells or 0.3 torpedoes
   Stability (Unstable if below 1.00): 1.33
   Metacentric height 1.6 ft / 0.5 m
   Roll period: 11.0 seconds
   Steadiness   - As gun platform (Average = 50 %): 59 %
         - Recoil effect (Restricted arc if above 1.00): 0.30
   Seaboat quality  (Average = 1.00): 1.04

Hull form characteristics:
   Hull has rise forward of midbreak,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0.500 / 0.511
   Length to Beam Ratio: 11.50 : 1
   'Natural speed' for length: 19.42 kts
   Power going to wave formation at top speed: 65 %
   Trim (Max stability = 0, Max steadiness = 100): 57
   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 %,  18.04 ft / 5.50 m,  18.04 ft / 5.50 m
      - Forward deck:   30.00 %,  18.04 ft / 5.50 m,  18.04 ft / 5.50 m
      - Aft deck:   35.00 %,  9.84 ft / 3.00 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:      13.94 ft / 4.25 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 175.4 %
      - Above water (accommodation/working, high = better): 159.8 %
   Waterplane Area: 8,247 Square feet or 766 Square metres
   Displacement factor (Displacement / loading): 70 %
   Structure weight / hull surface area: 30 lbs/sq ft or 147 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.50
      - Longitudinal: 1.18
      - Overall: 0.54
   Cramped machinery, storage, compartmentation space
   Excellent accommodation and workspace room

15t -Advanced  Hydrophones
24t - Depth Charges
4t - 4 x DC Thrower
16t - 1 x 4 x 21in HW TT Centerline
8t - 1918 FC