DD-1 Class

[TacCovert4]

DD-1, Aztec Destroyer laid down 1913

Displacement:
   750 t light; 779 t standard; 879 t normal; 959 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (292.24 ft / 287.40 ft) x 27.89 ft x (8.92 / 9.48 ft)
   (89.07 m / 87.60 m) x 8.50 m  x (2.72 / 2.89 m)

Armament:
      4 - 3.94" / 100 mm 50.0 cal guns - 32.30lbs / 14.65kg shells, 150 per gun
     Quick firing guns in deck mounts, 1913 Model
     4 x Single mounts on centreline, evenly spread
      2 - 0.31" / 8.0 mm 60.0 cal guns - 0.02lbs / 0.01kg shells, 1,500 per gun
     Machine guns in deck mounts, 1913 Model
     2 x Single mounts on centreline, forward evenly spread
      2 raised mounts
      Weight of broadside 129 lbs / 59 kg

Armour:
   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   0.98" / 25 mm         -               -

Machinery:
   Oil fired boilers, steam turbines,
   Direct drive, 3 shafts, 19,212 shp / 14,332 Kw = 30.00 kts
   Range 2,650nm at 14.00 kts
   Bunker at max displacement = 180 tons

Complement:
   79 - 104

Cost:
   £0.107 million / $0.426 million

Distribution of weights at normal displacement:
   Armament: 26 tons, 2.9 %
      - Guns: 26 tons, 2.9 %
   Armour: 9 tons, 1.0 %
      - Armament: 9 tons, 1.0 %
   Machinery: 460 tons, 52.3 %
   Hull, fittings & equipment: 239 tons, 27.2 %
   Fuel, ammunition & stores: 128 tons, 14.6 %
   Miscellaneous weights: 16 tons, 1.8 %
      - On freeboard deck: 16 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     281 lbs / 127 Kg = 9.2 x 3.9 " / 100 mm shells or 0.2 torpedoes
   Stability (Unstable if below 1.00): 1.43
   Metacentric height 1.4 ft / 0.4 m
   Roll period: 10.0 seconds
   Steadiness   - As gun platform (Average = 50 %): 53 %
         - Recoil effect (Restricted arc if above 1.00): 0.17
   Seaboat quality  (Average = 1.00): 1.06

Hull form characteristics:
   Hull has rise forward of midbreak,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0.430 / 0.442
   Length to Beam Ratio: 10.31 : 1
   'Natural speed' for length: 16.95 kts
   Power going to wave formation at top speed: 67 %
   Trim (Max stability = 0, Max steadiness = 100): 50
   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,  16.40 ft / 5.00 m
      - Forward deck:   30.00 %,  16.40 ft / 5.00 m,  16.40 ft / 5.00 m
      - Aft deck:   35.00 %,  8.04 ft / 2.45 m,  8.04 ft / 2.45 m
      - Quarter deck:   15.00 %,  8.04 ft / 2.45 m,  8.04 ft / 2.45 m
      - Average freeboard:      12.35 ft / 3.77 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 177.0 %
      - Above water (accommodation/working, high = better): 144.4 %
   Waterplane Area: 5,033 Square feet or 468 Square metres
   Displacement factor (Displacement / loading): 55 %
   Structure weight / hull surface area: 26 lbs/sq ft or 126 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.50
      - Longitudinal: 1.86
      - Overall: 0.57
   Cramped machinery, storage, compartmentation space
   Excellent accommodation and workspace room

16t on deck for 4 twin TT, 2 pairs per side.