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Saturday, February 24, 2007

A big ship is necessary to implement Colonel Cuniberti's ideas in Springsharp 3.0b Beta

I was able to get Colonel Cuniberti's ideas to work in Springsharp 3.0b Beta, but the ship had to have a great displacement and large dimensions. Lightweight machinery was also required, but I was able to use his armament layout and a 24 knot speed, with a complete 12in belt. This ship is really a battleship-cruiser of the sort advocated by William Hovgaard. This is the Springsharp report:
Ideal Battleship-Modified, Great Britain Battleship laid down 1905 (Engine 1909)

Displacement:
 24,583 t light; 25,679 t standard; 28,203 t normal; 30,223 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
 (603.00 ft / 589.00 ft) x 87.00 ft x (29.50 / 31.30 ft)
 (183.79 m / 179.53 m) x 26.52 m  x (8.99 / 9.54 m)

Armament:
      8 - 12.00" / 305 mm 45.0 cal guns - 871.37lbs / 395.24kg shells, 90 per gun
   Breech loading guns in turret on barbette mounts , 1905 Model
   2 x Twin mounts on centreline ends, evenly spread
   2 x Twin mounts on sides, forward deck aft
  2 double raised mounts
      4 - 12.00" / 305 mm 45.0 cal guns - 871.37lbs / 395.24kg shells, 90 per gun
   Breech loading guns in turret on barbette mounts , 1905 Model
   4 x Single mounts on sides, evenly spread
      12 - 3.00" / 76.2 mm 45.0 cal guns - 13.62lbs / 6.18kg shells, 90 per gun
   Quick firing guns in casemate mounts , 1905 Model
   12 x Single mounts on sides, evenly spread
  12 hull mounts in casemates- Limited use in heavy seas
 Weight of broadside 10,620 lbs / 10,620 kg

Armour:
   - Belts:  Width (max) Length (avg)  Height (avg)
 Main: 12.0" / 305 mm 350.00 ft / 106.68 m 8.00 ft / 2.44 m
 Ends: 12.0" / 305 mm 239.00 ft / 72.85 m 8.00 ft / 2.44 m
 Upper: 12.0" / 305 mm 230.00 ft / 70.10 m 8.00 ft / 2.44 m
   Main Belt covers 91 % of normal length
   Main belt does not fully cover magazines and engineering spaces

   - Torpedo Bulkhead:
  1.50" / 38 mm 350.00 ft / 106.68 m 29.50 ft / 8.99 m

   - Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
 Main: 12.0" / 305 mm 7.00" / 178 mm  12.0" / 305 mm
 2nd: 12.0" / 305 mm 7.00" / 178 mm  12.0" / 305 mm
 3rd: 6.00" / 152 mm 4.00" / 102 mm  4.00" / 102 mm

   - Armour deck: 2.00" / 51 mm, Conning tower: 12.00" / 305 mm

Machinery:
 Coal fired boilers, complex reciprocating steam engines, 
 ERROR: Revise drives, 4 shafts, 56,834 ihp / 42,398 Kw = 24.00 kts
 Range 5,200nm at 14.00 kts
 Bunker at max displacement = 4,545 tons (100% coal)

Complement:
 1,087 - 1,414

Cost:
 £2.457 million / $9.827 million

Distribution of weights at normal displacement:
 Armament: 2,031 tons, 7.2 %
 Armour: 9,041 tons, 32.1 %
    - Belts: 3,438 tons, 12.2 %
    - Torpedo bulkhead: 573 tons, 2.0 %
    - Armament: 3,334 tons, 11.8 %
    - Armour Deck: 1,456 tons, 5.2 %
    - Conning Tower: 240 tons, 0.8 %
 Machinery: 4,372 tons, 15.5 %
 Hull, fittings & equipment: 9,999 tons, 35.5 %
 Fuel, ammunition & stores: 3,620 tons, 12.8 %
 Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
 Survivability (Non-critical penetrating hits needed to sink ship):
   31,520 lbs / 14,297 Kg = 36.5 x 12.0 " / 305 mm shells or 4.5 torpedoes
 Stability (Unstable if below 1.00): 1.04
 Metacentric height 4.4 ft / 1.3 m
 Roll period: 17.5 seconds
 Steadiness - As gun platform (Average = 50 %): 54 %
   - Recoil effect (Restricted arc if above 1.00): 0.80
 Seaboat quality  (Average = 1.00): 1.08

Hull form characteristics:
 Hull has raised forecastle,
   a ram bow and a round stern
 Block coefficient (normal/deep): 0.653 / 0.660
 Length to Beam Ratio: 6.77 : 1
 'Natural speed' for length: 24.27 kts
 Power going to wave formation at top speed: 52 %
 Trim (Max stability = 0, Max steadiness = 100): 50
 Bow angle (Positive = bow angles forward): 0.00 degrees
 Stern overhang: 6.00 ft / 1.83 m
 Freeboard (% = length of deck as a percentage of waterline length):
    Fore end,  Aft end
    - Forecastle: 8.00 %,  28.00 ft / 8.53 m,  28.00 ft / 8.53 m
    - Forward deck: 30.00 %,  20.00 ft / 6.10 m,  20.00 ft / 6.10 m
    - Aft deck: 47.00 %,  20.00 ft / 6.10 m,  20.00 ft / 6.10 m
    - Quarter deck: 15.00 %,  20.00 ft / 6.10 m,  20.00 ft / 6.10 m
    - Average freeboard:  20.64 ft / 6.29 m

Ship space, strength and comments:
 Space - Hull below water (magazines/engines, low = better): 106.3 %
  - Above water (accommodation/working, high = better): 138.0 %
 Waterplane Area: 39,363 Square feet or 3,657 Square metres
 Displacement factor (Displacement / loading): 104 %
 Structure weight / hull surface area: 177 lbs/sq ft or 863 Kg/sq metre
 Hull strength (Relative):
  - Cross-sectional: 0.96
  - Longitudinal: 1.39
  - Overall: 1.00
 Hull space for machinery, storage, compartmentation is adequate
 Room for accommodation and workspaces is excellent

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