Persian Protected Cruiser

[ledeper]

Dareius/Xerxes, Persia PC laid down 1909 (Engine 1906)

Displacement:
   3.122 t light; 3.247 t standard; 3.557 t normal; 3.804 t full load

Dimensions: Length overall / water x beam x draught
   360,89 ft / 360,89 ft x 42,65 ft x 16,40 ft (normal load)
   110,00 m / 110,00 m x 13,00 m  x 5,00 m

Armament:
      2 - 5,00" / 127 mm guns in single mounts, 62,50lbs / 28,35kg shells, 1909 Model
     Breech loading guns in deck mounts
     on centreline ends, evenly spread
      6 - 5,00" / 127 mm guns in single mounts, 62,50lbs / 28,35kg shells, 1909 Model
     Breech loading guns in deck mounts
     on side, all amidships
      4 - 3,00" / 76,2 mm guns in single mounts, 13,50lbs / 6,12kg shells, 1909 Model
     Breech loading guns in deck mounts
     on side, evenly spread
   Weight of broadside 554 lbs / 251 kg
   Shells per gun, main battery: 150

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   4,00" / 102 mm   234,58 ft / 71,50 m   7,84 ft / 2,39 m
   Ends:   2,00" / 51 mm   126,29 ft / 38,49 m   7,84 ft / 2,39 m
   Upper:   2,00" / 51 mm   234,58 ft / 71,50 m   8,00 ft / 2,44 m
     Main Belt covers 100 % of normal length

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   4,00" / 102 mm   2,00" / 51 mm            -
   2nd:   4,00" / 102 mm   2,00" / 51 mm            -
   3rd:   2,00" / 51 mm   1,00" / 25 mm            -

   - Armour deck: 2,00" / 51 mm, Conning tower: 4,00" / 102 mm

Machinery:
   Coal fired boilers, complex reciprocating steam engines,
   Direct drive, 2 shafts, 5.721 ihp / 4.268 Kw = 18,00 kts
   Range 4.500nm at 10,00 kts
   Bunker at max displacement = 557 tons (100% coal)

Complement:
   229 - 299

Cost:
   £0,282 million / $1,127 million

Distribution of weights at normal displacement:
   Armament: 69 tons, 1,9 %
   Armour: 1.035 tons, 29,1 %
      - Belts: 543 tons, 15,3 %
      - Torpedo bulkhead: 0 tons, 0,0 %
      - Armament: 95 tons, 2,7 %
      - Armour Deck: 377 tons, 10,6 %
      - Conning Tower: 20 tons, 0,6 %
   Machinery: 817 tons, 23,0 %
   Hull, fittings & equipment: 1.051 tons, 29,5 %
   Fuel, ammunition & stores: 434 tons, 12,2 %
   Miscellaneous weights: 150 tons, 4,2 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     4.389 lbs / 1.991 Kg = 70,2 x 5,0 " / 127 mm shells or 1,0 torpedoes
   Stability (Unstable if below 1.00): 1,26
   Metacentric height 2,1 ft / 0,6 m
   Roll period: 12,3 seconds
   Steadiness   - As gun platform (Average = 50 %): 89 %
         - Recoil effect (Restricted arc if above 1.00): 0,21
   Seaboat quality  (Average = 1.00): 1,78

Hull form characteristics:
   Hull has a flush deck
   Block coefficient: 0,493
   Length to Beam Ratio: 8,46 : 1
   'Natural speed' for length: 19,00 kts
   Power going to wave formation at top speed: 40 %
   Trim (Max stability = 0, Max steadiness = 100): 50
   Bow angle (Positive = bow angles forward): 0,00 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 %):   13,29 ft / 4,05 m
      - Mid (50 %):      13,29 ft / 4,05 m
      - Quarterdeck (15 %):   13,29 ft / 4,05 m
      - Stern:      13,29 ft / 4,05 m
      - Average freeboard:   13,54 ft / 4,13 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 94,8 %
      - Above water (accommodation/working, high = better): 112,6 %
   Waterplane Area: 10.191 Square feet or 947 Square metres
   Displacement factor (Displacement / loading): 105 %
   Structure weight / hull surface area: 63 lbs/sq ft or 305 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0,95
      - Longitudinal: 1,63
      - Overall: 1,00
   Hull space for machinery, storage, compartmentation is adequate
   Room for accommodation and workspaces is adequate
   Ship has slow, easy roll, a good, steady gun platform
   Excellent seaboat, comfortable, can fire her guns in the heaviest weather

Dareius
Xerxes