DD-I Class

[TacCovert4]

I-Class, Aztec Destroyer laid down 1925

Displacement:
   2,000 t light; 2,097 t standard; 2,346 t normal; 2,545 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (400.87 ft / 393.70 ft) x 36.09 ft x (10.51 / 11.21 ft)
   (122.18 m / 120.00 m) x 11.00 m  x (3.20 / 3.42 m)

Armament:
      6 - 5.12" / 130 mm 50.0 cal guns - 70.97lbs / 32.19kg shells, 200 per gun
     Quick firing guns in deck and hoist mounts, 1925 Model
     3 x Twin mounts on centreline ends, majority forward
      1 raised mount - superfiring
      6 - 1.18" / 30.0 mm 50.0 cal guns - 0.87lbs / 0.40kg shells, 1,000 per gun
     Quick firing guns in deck and hoist mounts, 1925 Model
     2 x Twin mounts on sides, forward deck aft
     1 x Twin mount on centreline, aft deck centre
      1 raised mount
      Weight of broadside 431 lbs / 196 kg

Armour:
   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   1.18" / 30 mm   1.18" / 30 mm      1.18" / 30 mm
   2nd:         -            -         1.18" / 30 mm

   - Box over magazines:
   1.18" / 30 mm

   - Conning towers: Forward 1.18" / 30 mm, Aft 0.00" / 0 mm

Machinery:
   Oil fired boilers, steam turbines,
   Geared drive, 2 shafts, 43,617 shp / 32,538 Kw = 32.25 kts
   Range 5,000nm at 14.00 kts
   Bunker at max displacement = 448 tons

Complement:
   168 - 219

Cost:
   £0.917 million / $3.667 million

Distribution of weights at normal displacement:
   Armament: 104 tons, 4.4 %
      - Guns: 104 tons, 4.4 %
   Armour: 50 tons, 2.1 %
      - Armament: 26 tons, 1.1 %
      - Armour Deck: 19 tons, 0.8 %
      - Conning Tower: 4 tons, 0.2 %
   Machinery: 1,173 tons, 50.0 %
   Hull, fittings & equipment: 646 tons, 27.5 %
   Fuel, ammunition & stores: 346 tons, 14.7 %
   Miscellaneous weights: 27 tons, 1.2 %
      - Hull above water: 6 tons
      - On freeboard deck: 16 tons
      - Above deck: 5 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     611 lbs / 277 Kg = 9.1 x 5.1 " / 130 mm shells or 0.3 torpedoes
   Stability (Unstable if below 1.00): 1.11
   Metacentric height 1.3 ft / 0.4 m
   Roll period: 13.2 seconds
   Steadiness   - As gun platform (Average = 50 %): 70 %
         - Recoil effect (Restricted arc if above 1.00): 0.81
   Seaboat quality  (Average = 1.00): 1.01

Hull form characteristics:
   Hull has a flush deck,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0.550 / 0.559
   Length to Beam Ratio: 10.91 : 1
   'Natural speed' for length: 19.84 kts
   Power going to wave formation at top speed: 66 %
   Trim (Max stability = 0, Max steadiness = 100): 69
   Bow angle (Positive = bow angles forward): 20.00 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 %,  19.69 ft / 6.00 m,  18.04 ft / 5.50 m
      - Forward deck:   30.00 %,  18.04 ft / 5.50 m,  14.76 ft / 4.50 m
      - Aft deck:   35.00 %,  14.76 ft / 4.50 m,  14.76 ft / 4.50 m
      - Quarter deck:   15.00 %,  14.76 ft / 4.50 m,  14.76 ft / 4.50 m
      - Average freeboard:      16.04 ft / 4.89 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 180.1 %
      - Above water (accommodation/working, high = better): 174.5 %
   Waterplane Area: 9,916 Square feet or 921 Square metres
   Displacement factor (Displacement / loading): 70 %
   Structure weight / hull surface area: 37 lbs/sq ft or 183 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.50
      - Longitudinal: 1.43
      - Overall: 0.56
   Cramped machinery, storage, compartmentation space
   Excellent accommodation and workspace room
   Ship has slow, easy roll, a good, steady gun platform

11t - 1918 FC
16t - 1x4x21in HW TT Centerline