Esc Destroyers for 20-24

[ledeper]

Dd 43-, Enter country Enter ship type laid down 1920

Displacement:
   1.499 t light; 1.571 t standard; 2.006 t normal; 2.353 t full load

Dimensions: Length overall / water x beam x draught
   390,03 ft / 387,14 ft x 42,16 ft x 11,32 ft (normal load)
   118,88 m / 118,00 m x 12,85 m  x 3,45 m

Armament:
      8 - 4,92" / 125 mm guns (4x2 guns), 59,59lbs / 27,03kg shells, 1920 Model
     Quick firing guns in deck mounts
     on centreline ends, evenly spread, 2 raised mounts - superfiring
      4 - 1,57" / 40,0 mm guns in single mounts, 1,95lbs / 0,88kg shells, 1920 Model
     Anti-aircraft guns in deck mounts
     on side, all amidships
     4 guns in hull casemates - Limited use in all but light seas
   Weight of broadside 485 lbs / 220 kg
   Shells per gun, main battery: 120
   2 - 19,7" / 500 mm above water torpedoes

Machinery:
   Oil fired boilers, steam turbines,
   Geared drive, 3 shafts, 27.310 shp / 20.373 Kw = 30,00 kts
   Range 9.500nm at 14,00 kts
   Bunker at max displacement = 782 tons

Complement:
   149 - 194

Cost:
   £0,523 million / $2,093 million

Distribution of weights at normal displacement:
   Armament: 61 tons, 3,0 %
   Machinery: 843 tons, 42,0 %
   Hull, fittings & equipment: 520 tons, 25,9 %
   Fuel, ammunition & stores: 507 tons, 25,3 %
   Miscellaneous weights: 75 tons, 3,7 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     769 lbs / 349 Kg = 12,9 x 4,9 " / 125 mm shells or 0,4 torpedoes
   Stability (Unstable if below 1.00): 1,78
   Metacentric height 3,5 ft / 1,1 m
   Roll period: 9,5 seconds
   Steadiness   - As gun platform (Average = 50 %): 53 %
         - Recoil effect (Restricted arc if above 1.00): 0,14
   Seaboat quality  (Average = 1.00): 1,07

Hull form characteristics:
   Hull has a flush deck
   Block coefficient: 0,380
   Length to Beam Ratio: 9,18 : 1
   'Natural speed' for length: 19,68 kts
   Power going to wave formation at top speed: 59 %
   Trim (Max stability = 0, Max steadiness = 100): 50
   Bow angle (Positive = bow angles forward): 10,00 degrees
   Stern overhang: 0,00 ft / 0,00 m
   Freeboard (% = measuring location as a percentage of overall length):
      - Stem:      16,40 ft / 5,00 m
      - Forecastle (20 %):   13,12 ft / 4,00 m
      - Mid (50 %):      13,12 ft / 4,00 m
      - Quarterdeck (15 %):   13,12 ft / 4,00 m
      - Stern:      13,12 ft / 4,00 m
      - Average freeboard:   13,39 ft / 4,08 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 162,5 %
      - Above water (accommodation/working, high = better): 154,6 %
   Waterplane Area: 9.951 Square feet or 925 Square metres
   Displacement factor (Displacement / loading): 81 %
   Structure weight / hull surface area: 34 lbs/sq ft or 167 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0,50
      - Longitudinal: 0,88
      - Overall: 0,53
   Hull space for machinery, storage, compartmentation is cramped
   Room for accommodation and workspaces is excellent

Trial Speed: 30,5 knts
Range at max speed: 1300 Nm.
Torpedoes:20 tns 4 reloads
L/R W/L 25 tns
Reserve  : 30 tns