DD-F Class

[TacCovert4]

DD-F, Aztec Destroyer laid down 1922

Displacement:
   1,498 t light; 1,571 t standard; 1,925 t normal; 2,208 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (365.29 ft / 360.89 ft) x 30.35 ft x (12.30 / 13.66 ft)
   (111.34 m / 110.00 m) x 9.25 m  x (3.75 / 4.16 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, 1922 Model
     4 x Single mounts on centreline ends, evenly spread
      2 raised mounts - superfiring
      4 - 1.18" / 30.0 mm 50.0 cal guns - 0.87lbs / 0.40kg shells, 1,000 per gun
     Anti-air guns in deck and hoist mounts, 1922 Model
     2 x Single mounts on centreline, aft deck forward
      8 - 0.47" / 12.0 mm 70.0 cal guns - 0.06lbs / 0.03kg shells, 2,000 per gun
     Machine guns in deck mounts, 1922 Model
     4 x Twin mounts on sides, evenly spread
      Weight of broadside 288 lbs / 131 kg

Armour:
   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   1.06" / 27 mm         -               -
   2nd:         -            -         0.98" / 25 mm

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

Machinery:
   Oil fired boilers, steam turbines,
   Geared drive, 2 shafts, 35,551 shp / 26,521 Kw = 31.65 kts
   Range 8,000nm at 14.00 kts
   Bunker at max displacement = 637 tons

Complement:
   144 - 188

Cost:
   £0.567 million / $2.269 million

Distribution of weights at normal displacement:
   Armament: 57 tons, 3.0 %
      - Guns: 57 tons, 3.0 %
   Armour: 15 tons, 0.8 %
      - Armament: 11 tons, 0.6 %
      - Conning Tower: 4 tons, 0.2 %
   Machinery: 998 tons, 51.8 %
   Hull, fittings & equipment: 388 tons, 20.1 %
   Fuel, ammunition & stores: 426 tons, 22.2 %
   Miscellaneous weights: 41 tons, 2.1 %
      - Hull below water: 5 tons
      - On freeboard deck: 30 tons
      - Above deck: 6 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     464 lbs / 210 Kg = 6.9 x 5.1 " / 130 mm shells or 0.3 torpedoes
   Stability (Unstable if below 1.00): 1.34
   Metacentric height 1.4 ft / 0.4 m
   Roll period: 10.8 seconds
   Steadiness   - As gun platform (Average = 50 %): 66 %
         - Recoil effect (Restricted arc if above 1.00): 0.37
   Seaboat quality  (Average = 1.00): 1.01

Hull form characteristics:
   Hull has rise forward of midbreak,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0.500 / 0.517
   Length to Beam Ratio: 11.89 : 1
   'Natural speed' for length: 19.00 kts
   Power going to wave formation at top speed: 65 %
   Trim (Max stability = 0, Max steadiness = 100): 66
   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 %,  16.40 ft / 5.00 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 %,  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:      13.12 ft / 4.00 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 176.4 %
      - Above water (accommodation/working, high = better): 124.2 %
   Waterplane Area: 7,297 Square feet or 678 Square metres
   Displacement factor (Displacement / loading): 74 %
   Structure weight / hull surface area: 29 lbs/sq ft or 143 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.50
      - Longitudinal: 1.22
      - Overall: 0.54
   Cramped machinery, storage, compartmentation space
   Excellent accommodation and workspace room

5t - Hydrophones
6t - Depth Charges
24t - 2 x 3 x 21in HW TT Centerline
6t - 1918 FC

Trials Speed 32.5kts
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[TacCovert4]

DE-F, Aztec Escort Destroyer laid down 1922

Displacement:
   1,499 t light; 1,571 t standard; 1,925 t normal; 2,208 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (365.29 ft / 360.89 ft) x 30.35 ft x (12.30 / 13.66 ft)
   (111.34 m / 110.00 m) x 9.25 m  x (3.75 / 4.16 m)

Armament:
      4 - 4.72" / 120 mm 55.0 cal guns - 56.91lbs / 25.81kg shells, 200 per gun
     Dual purpose guns in deck mounts, 1931 Model
     4 x Single mounts on centreline ends, evenly spread
      2 raised mounts - superfiring
      4 - 1.18" / 30.0 mm 50.0 cal guns - 0.86lbs / 0.39kg shells, 1,000 per gun
     Anti-air guns in deck and hoist mounts, 1922 Model
     2 x Single mounts on centreline, aft deck forward
      8 - 1.18" / 30.0 mm 50.0 cal guns - 0.87lbs / 0.40kg shells, 1,500 per gun
     Anti-air guns in deck mounts, 1931 Model
     8 x Twin mounts on sides, evenly spread
      Weight of broadside 238 lbs / 108 kg

Armour:
   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   1.06" / 27 mm   0.04" / 1 mm            -
   2nd:         -            -         0.98" / 25 mm

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

Machinery:
   Oil fired boilers, steam turbines,
   Geared drive, 2 shafts, 35,551 shp / 26,521 Kw = 31.65 kts
   Range 8,000nm at 14.00 kts
   Bunker at max displacement = 637 tons

Complement:
   144 - 188

Cost:
   £0.564 million / $2.258 million

Distribution of weights at normal displacement:
   Armament: 56 tons, 2.9 %
      - Guns: 56 tons, 2.9 %
   Armour: 8 tons, 0.4 %
      - Armament: 5 tons, 0.2 %
      - Conning Tower: 4 tons, 0.2 %
   Machinery: 1,000 tons, 51.9 %
   Hull, fittings & equipment: 382 tons, 19.9 %
   Fuel, ammunition & stores: 426 tons, 22.1 %
   Miscellaneous weights: 53 tons, 2.8 %
      - Hull below water: 25 tons
      - On freeboard deck: 22 tons
      - Above deck: 6 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     466 lbs / 211 Kg = 8.8 x 4.7 " / 120 mm shells or 0.3 torpedoes
   Stability (Unstable if below 1.00): 1.37
   Metacentric height 1.4 ft / 0.4 m
   Roll period: 10.6 seconds
   Steadiness   - As gun platform (Average = 50 %): 67 %
         - Recoil effect (Restricted arc if above 1.00): 0.30
   Seaboat quality  (Average = 1.00): 1.01

Hull form characteristics:
   Hull has rise forward of midbreak,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0.500 / 0.517
   Length to Beam Ratio: 11.89 : 1
   'Natural speed' for length: 19.00 kts
   Power going to wave formation at top speed: 65 %
   Trim (Max stability = 0, Max steadiness = 100): 66
   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 %,  16.40 ft / 5.00 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 %,  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:      13.12 ft / 4.00 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 177.2 %
      - Above water (accommodation/working, high = better): 124.2 %
   Waterplane Area: 7,297 Square feet or 678 Square metres
   Displacement factor (Displacement / loading): 74 %
   Structure weight / hull surface area: 29 lbs/sq ft or 141 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.50
      - Longitudinal: 1.21
      - Overall: 0.54
   Cramped machinery, storage, compartmentation space
   Excellent accommodation and workspace room

15t - Advanced Hydrophones
10t - Sonar

2t - 2 x  DC Thrower
8t - Depth Charges
12t - 1 x 3 x 21in HW TT Centerline

6t - 1918 FC

Trials Speed 32.5kts