Persian Destroyer

[ledeper]

Quom II class, Persia Destroyer laid down 1909 (Engine 1906)

Displacement:
   486 t light; 511 t standard; 555 t normal; 591 t full load

Dimensions: Length overall / water x beam x draught
   216,67 ft / 213,25 ft x 22,97 ft x 9,84 ft (normal load)
   66,04 m / 65,00 m x 7,00 m  x 3,00 m

Armament:
      3 - 4,92" / 125 mm guns in single mounts, 59,59lbs / 27,03kg shells, 1909 Model
     Quick firing guns in deck mounts
     on centreline ends, majority forward, 1 raised mount
      4 - 1,57" / 40,0 mm guns in single mounts, 1,95lbs / 0,88kg shells, 1909 Model
     Quick firing guns in deck mounts
     on side, all amidships
   Weight of broadside 187 lbs / 85 kg
   Shells per gun, main battery: 130
   2 - 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,
   Direct drive, 2 shafts, 9.968 shp / 7.436 Kw = 26,45 kts
   Range 1.500nm at 12,00 kts
   Bunker at max displacement = 80 tons

Complement:
   56 - 74

Cost:
   £0,074 million / $0,296 million

Distribution of weights at normal displacement:
   Armament: 23 tons, 4,2 %
   Armour: 2 tons, 0,4 %
      - Belts: 0 tons, 0,0 %
      - Torpedo bulkhead: 0 tons, 0,0 %
      - Armament: 2 tons, 0,4 %
      - Armour Deck: 0 tons, 0,0 %
      - Conning Tower: 0 tons, 0,0 %
   Machinery: 268 tons, 48,2 %
   Hull, fittings & equipment: 162 tons, 29,3 %
   Fuel, ammunition & stores: 69 tons, 12,5 %
   Miscellaneous weights: 30 tons, 5,4 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     135 lbs / 61 Kg = 2,3 x 4,9 " / 125 mm shells or 0,2 torpedoes
   Stability (Unstable if below 1.00): 1,33
   Metacentric height 0,9 ft / 0,3 m
   Roll period: 10,1 seconds
   Steadiness   - As gun platform (Average = 50 %): 52 %
         - Recoil effect (Restricted arc if above 1.00): 0,51
   Seaboat quality  (Average = 1.00): 1,04

Hull form characteristics:
   Hull has a flush deck
   Block coefficient: 0,403
   Length to Beam Ratio: 9,29 : 1
   'Natural speed' for length: 14,60 kts
   Power going to wave formation at top speed: 68 %
   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:      16,08 ft / 4,90 m
      - Forecastle (10 %):   10,24 ft / 3,12 m
      - Mid (40 %):      10,24 ft / 3,12 m
      - Quarterdeck (15 %):   10,24 ft / 3,12 m
      - Stern:      10,24 ft / 3,12 m
      - Average freeboard:   10,47 ft / 3,19 m

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 193,1 %
      - Above water (accommodation/working, high = better): 83,4 %
   Waterplane Area: 3.020 Square feet or 281 Square metres
   Displacement factor (Displacement / loading): 37 %
   Structure weight / hull surface area: 25 lbs/sq ft or 121 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0,51
      - Longitudinal: 3,14
      - Overall: 0,61
   Hull space for machinery, storage, compartmentation is cramped
   Room for accommodation and workspaces is cramped


radio 10t
torpedoes 5t
9 active ,2 building commissioned 5/17