Destroyers

[Jefgte]

D15, Byzantine Empire Heavy Destroyer laid down 1932

D189 - D190 - D191 - D192

Displacement:
   1 900 t light; 2 028 t standard; 2 381 t normal; 2 664 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (401,65 ft / 396,98 ft) x 38,71 ft x (13,10 / 14,13 ft)
   (122,42 m / 121,00 m) x 11,80 m  x (3,99 / 4,31 m)

Armament:
      6 - 4,49" / 114 mm 45,0 cal guns - 58,00lbs / 26,31kg shells, 320 per gun
     Dual purpose guns in deck mounts, 1932 Model
     3 x 2-gun mounts on centreline ends, majority forward
      1 raised mount - superfiring
      4 - 1,57" / 40,0 mm 39,0 cal guns - 2,01lbs / 0,91kg shells, 2 000 per gun
     Anti-air guns in deck mounts, 1932 Model
     2 x 2-gun mounts on sides, forward deck forward
      2 raised mounts
      4 - 1,57" / 40,0 mm 39,0 cal guns - 2,01lbs / 0,91kg shells, 2 000 per gun
     Anti-air guns in deck mounts, 1932 Model
     2 x 2-gun mounts on sides, aft deck forward
      2 raised mounts
      4 - 0,50" / 12,7 mm 62,0 cal guns - 0,07lbs / 0,03kg shells, 4 000 per gun
     Machine guns in deck mounts, 1932 Model
     2 x 2-gun mounts on sides, forward deck forward
      2 raised mounts
      Weight of broadside 364 lbs / 165 kg

Armour:
   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   0,39" / 10 mm         -               -
   2nd:   0,24" / 6 mm         -               -
   3rd:   0,24" / 6 mm         -               -
   4th:   0,24" / 6 mm         -               -

Machinery:
   Oil fired boilers, steam turbines,
   Geared drive, 2 shafts, 44 580 shp / 33 256 Kw = 32,95 kts
   Range 11 000nm at 12,00 kts
   Bunker at max displacement = 636 tons

Complement:
   169 - 221

Cost:
   £1,123 million / $4,493 million

Distribution of weights at normal displacement:
   Armament: 55 tons, 2,3 %
      - Guns: 55 tons, 2,3 %
   Armour: 5 tons, 0,2 %
      - Armament: 5 tons, 0,2 %
   Machinery: 1 190 tons, 50,0 %
   Hull, fittings & equipment: 535 tons, 22,5 %
   Fuel, ammunition & stores: 481 tons, 20,2 %
   Miscellaneous weights: 115 tons, 4,8 %
      - Hull above water: 15 tons
      - On freeboard deck: 70 tons
      - Above deck: 30 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     657 lbs / 298 Kg = 14,5 x 4,5 " / 114 mm shells or 0,4 torpedoes
   Stability (Unstable if below 1.00): 1,33
   Metacentric height 2,0 ft / 0,6 m
   Roll period: 11,5 seconds
   Steadiness   - As gun platform (Average = 50 %): 70 %
         - Recoil effect (Restricted arc if above 1.00): 0,21
   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): 0,414 / 0,429
   Length to Beam Ratio: 10,25 : 1
   'Natural speed' for length: 19,92 kts
   Power going to wave formation at top speed: 63 %
   Trim (Max stability = 0, Max steadiness = 100): 69
   Bow angle (Positive = bow angles forward): 12,00 degrees
   Stern overhang: 0,00 ft / 0,00 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
      - Forecastle:   18,00 %,  21,98 ft / 6,70 m,  17,06 ft / 5,20 m
      - Forward deck:   33,00 %,  17,06 ft / 5,20 m,  13,12 ft / 4,00 m
      - Aft deck:   33,00 %,  13,12 ft / 4,00 m,  12,14 ft / 3,70 m
      - Quarter deck:   16,00 %,  12,14 ft / 3,70 m,  12,47 ft / 3,80 m
      - Average freeboard:      14,54 ft / 4,43 m

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 170,6 %
      - Above water (accommodation/working, high = better): 149,1 %
   Waterplane Area: 9 542 Square feet or 887 Square metres
   Displacement factor (Displacement / loading): 83 %
   Structure weight / hull surface area: 34 lbs/sq ft or 166 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0,50
      - Longitudinal: 1,11
      - Overall: 0,54
   Cramped machinery, storage, compartmentation space
   Excellent accommodation and workspace room
   Ship has slow, easy roll, a good, steady gun platform

AD
5t for1924 top mast rangefinder
25t for LR marconi
OD
24t for 2x3TTx533HW
16t for 2x2TTx533HW
10t for1920 sonar
6t for 30x195 DC
5t for nightfighting equipment
9t reserved for new material, paravanes, armament, minen.
AW
15t for enhanced hydrophone
climatisation

Trial speed: 33.5 kts
Bonus: 0.55