Long Range Destroyer

[ledeper]

DDL, BCS Destroyer laid down 1918 (Engine 1916)

Displacement:
   1.500 t light; 1.589 t standard; 1.931 t normal; 2.205 t full load

Dimensions: Length overall / water x beam x draught
   361,80 ft / 357,61 ft x 32,81 ft x 13,12 ft (normal load)
   110,28 m / 109,00 m x 10,00 m  x 4,00 m

Armament:
      10 - 4,92" / 125 mm guns (5x2 guns), 59,59lbs / 27,03kg shells, 1918 Model
     Quick firing guns in deck mounts
     on centreline ends, majority forward, 2 raised mounts - superfiring
      4 - 1,57" / 40,0 mm guns in single mounts, 1,95lbs / 0,89kg shells, 1918 Model
     Quick firing guns in deck mounts
     on side, all amidships
   Weight of broadside 604 lbs / 274 kg
   Shells per gun, main battery: 150
   4 - 18,0" / 457,2 mm above water torpedoes

Armour:
   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   0,25" / 6 mm         -               -

Machinery:
   Oil fired boilers, steam turbines,
   Geared drive, 2 shafts, 27.034 shp / 20.168 Kw = 29,74 kts@31,5 kts
   Range 9.300nm at 12,00 kts
   Bunker at max displacement = 616 tons

Complement:
   145 - 189

Cost:
   £0,462 million / $1,849 million

Distribution of weights at normal displacement:
   Armament: 75 tons, 3,9 %
   Armour: 6 tons, 0,3 %
      - Belts: 0 tons, 0,0 %
      - Torpedo bulkhead: 0 tons, 0,0 %
      - Armament: 6 tons, 0,3 %
      - Armour Deck: 0 tons, 0,0 %
      - Conning Tower: 0 tons, 0,0 %
   Machinery: 823 tons, 42,6 %
   Hull, fittings & equipment: 535 tons, 27,7 %
   Fuel, ammunition & stores: 432 tons, 22,3 %
   Miscellaneous weights: 60 tons, 3,1 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     617 lbs / 280 Kg = 10,3 x 4,9 " / 125 mm shells or 0,3 torpedoes
   Stability (Unstable if below 1.00): 1,45
   Metacentric height 1,8 ft / 0,5 m
   Roll period: 10,3 seconds
   Steadiness   - As gun platform (Average = 50 %): 78 %
         - Recoil effect (Restricted arc if above 1.00): 0,63
   Seaboat quality  (Average = 1.00): 1,56

Hull form characteristics:
   Hull has a flush deck
   Block coefficient: 0,439
   Length to Beam Ratio: 10,90 : 1
   'Natural speed' for length: 18,91 kts
   Power going to wave formation at top speed: 61 %
   Trim (Max stability = 0, Max steadiness = 100): 50
   Bow angle (Positive = bow angles forward): 12,00 degrees
   Stern overhang: 0,00 ft / 0,00 m
   Freeboard (% = measuring location as a percentage of overall length):
      - Stem:      19,69 ft / 6,00 m
      - Forecastle (10 %):   16,40 ft / 5,00 m
      - Mid (40 %):      16,40 ft / 5,00 m
      - Quarterdeck (15 %):   13,12 ft / 4,00 m
      - Stern:      13,22 ft / 4,03 m
      - Average freeboard:   15,31 ft / 4,67 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 170,8 %
      - Above water (accommodation/working, high = better): 124,3 %
   Waterplane Area: 7.418 Square feet or 689 Square metres
   Displacement factor (Displacement / loading): 72 %
   Structure weight / hull surface area: 33 lbs/sq ft or 163 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0,50
      - Longitudinal: 2,16
      - Overall: 0,58
   Hull space for machinery, storage, compartmentation is cramped
   Room for accommodation and workspaces is excellent
   Ship has slow, easy roll, a good, steady gun platform
   Excellent seaboat, comfortable, can fire her guns in the heaviest weather

firecontrol 25t
radio 10t
torpedoes 20
reserve 5 t

[Korpen]

      10 - 4,92" / 125 mm guns (5x2 guns), 59,59lbs / 27,03kg shells, 1918 Model
     Quick firing guns in deck mounts
     on centreline ends, majority forward, 2 raised mounts - superfiring

All twin mouts must be  mount & hoist. This will in effect make the guns twice as heavy.

Twin gun mounts requires hoists, and they are power operated.

http://www.navalism.org/index.php?topic=81.0

[ledeper]

Island -class batch nr 3, BCS Destroyer laid down 1918 (Engine 1916)

Displacement:
   1.500 t light; 1.582 t standard; 1.922 t normal; 2.193 t full load

Dimensions: Length overall / water x beam x draught
   361,80 ft / 357,61 ft x 39,37 ft x 13,12 ft (normal load)
   110,28 m / 109,00 m x 12,00 m  x 4,00 m

Armament:
      10 - 4,92" / 125 mm guns (5x2 guns), 59,59lbs / 27,03kg shells, 1918 Model
     Quick firing guns in deck mounts with hoists
     on centreline ends, majority forward, 2 raised mounts - superfiring
      4 - 1,57" / 40,0 mm guns in single mounts, 1,95lbs / 0,88kg shells, 1918 Model
     Quick firing guns in deck mounts
     on side, all amidships
   Weight of broadside 604 lbs / 274 kg
   Shells per gun, main battery: 130
   4 - 18,0" / 457,2 mm above water torpedoes

Armour:
   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   0,25" / 6 mm         -               -

Machinery:
   Oil fired boilers, steam turbines,
   Geared drive, 2 shafts, 21.397 shp / 15.962 Kw = 28,25 kts@ 30 kts
   Range 9.300nm at 12,00 kts
   Bunker at max displacement = 611 tons

Complement:
   144 - 188

Cost:
   £0,434 million / $1,734 million

Distribution of weights at normal displacement:
   Armament: 75 tons, 3,9 %
   Armour: 6 tons, 0,3 %
      - Belts: 0 tons, 0,0 %
      - Torpedo bulkhead: 0 tons, 0,0 %
      - Armament: 6 tons, 0,3 %
      - Armour Deck: 0 tons, 0,0 %
      - Conning Tower: 0 tons, 0,0 %
   Machinery: 721 tons, 37,5 %
   Hull, fittings & equipment: 638 tons, 33,2 %
   Fuel, ammunition & stores: 422 tons, 22,0 %
   Miscellaneous weights: 60 tons, 3,1 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     776 lbs / 352 Kg = 13,0 x 4,9 " / 125 mm shells or 0,4 torpedoes
   Stability (Unstable if below 1.00): 1,30
   Metacentric height 2,0 ft / 0,6 m
   Roll period: 11,7 seconds
   Steadiness   - As gun platform (Average = 50 %): 73 %
         - Recoil effect (Restricted arc if above 1.00): 0,78
   Seaboat quality  (Average = 1.00): 1,45

Hull form characteristics:
   Hull has a flush deck
   Block coefficient: 0,364
   Length to Beam Ratio: 9,08 : 1
   'Natural speed' for length: 18,91 kts
   Power going to wave formation at top speed: 58 %
   Trim (Max stability = 0, Max steadiness = 100): 50
   Bow angle (Positive = bow angles forward): 12,00 degrees
   Stern overhang: 0,00 ft / 0,00 m
   Freeboard (% = measuring location as a percentage of overall length):
      - Stem:      19,69 ft / 6,00 m
      - Forecastle (10 %):   16,40 ft / 5,00 m
      - Mid (40 %):      16,40 ft / 5,00 m
      - Quarterdeck (15 %):   13,12 ft / 4,00 m
      - Stern:      13,22 ft / 4,03 m
      - Average freeboard:   15,31 ft / 4,67 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 154,3 %
      - Above water (accommodation/working, high = better): 149,3 %
   Waterplane Area: 8.548 Square feet or 794 Square metres
   Displacement factor (Displacement / loading): 85 %
   Structure weight / hull surface area: 41 lbs/sq ft or 203 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0,50
      - Longitudinal: 1,83
      - Overall: 0,57
   Hull space for machinery, storage, compartmentation is cramped
   Room for accommodation and workspaces is excellent
   Ship has slow, easy roll, a good, steady gun platform
   Good seaboat, rides out heavy weather easily

firecontrol 25t
radio 10t
torpedoes 20
reserve 5 t