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Saturday, June 16, 2007

The Ger/CB/1906 with Springsharp 3.0b2 Beta

I was finally able to download Springsharp 3.0b2 Beta this evening. My first design was the Ger/CB/1906 original version, as the ship has a sharply inclined belt. That was about the only unique feature that I used from the new Springsharp. The Ger/CB/1906 was intended to be a 33 knot battlecruiser with a 4in belt and 3in deck. The turrets and barbettes are 6in. To make the design work, I had to use more displacement and higher power than intended. I had optimistically specified 120,000 SHP for a 25,000 ton ship to make 33 knots. This is the Springsharp report:
Ger/CB/1906 Original version greater displacement, Germany Battlecruiser laid down 1906 (Engine 1908)

Displacement:
 26,161 t light; 27,139 t standard; 29,759 t normal; 31,855 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
 (805.00 ft / 800.00 ft) x 85.00 ft x (26.50 / 28.01 ft)
 (245.36 m / 243.84 m) x 25.91 m  x (8.08 / 8.54 m)

Armament:
      8 - 12.00" / 305 mm 45.0 cal guns - 871.37lbs / 395.25kg shells, 90 per gun
   Breech loading guns in turret on barbette mounts, 1906 Model
   4 x Twin mounts on centreline ends, evenly spread
  2 raised mounts - superfiring
   Aft Main mounts separated by engine room
      12 - 4.00" / 102 mm 50.0 cal guns - 33.88lbs / 15.37kg shells, 150 per gun
   Quick firing guns in deck and hoist mounts, 1906 Model
   12 x Twin mounts on sides amidships
      Weight of broadside 7,378 lbs / 3,346 kg

Armour:
   - Belts:  Width (max) Length (avg)  Height (avg)
 Main: 4.00" / 102 mm 420.00 ft / 128.02 m 16.00 ft / 4.88 m
 Ends: Unarmoured
   Main Belt covers 81 % of normal length
   Main belt does not fully cover magazines and engineering spaces

   - Torpedo Bulkhead:
  1.50" / 38 mm 420.00 ft / 128.02 m 25.60 ft / 7.80 m

   - Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
 Main: 6.00" / 152 mm 6.00" / 152 mm  6.00" / 152 mm
 2nd: 3.00" / 76 mm 2.00" / 51 mm  3.00" / 76 mm

   - Armoured deck - single deck: 3.00" / 76 mm For and Aft decks

Machinery:
 Oil fired boilers, steam turbines, 
 Direct drive, 4 shafts, 173,722 shp / 129,596 Kw = 33.00 kts
 Range 5,600nm at 15.00 kts
 Bunker at max displacement = 4,716 tons

Complement:
 1,132 - 1,472

Cost:
 £2.838 million / $11.353 million

Distribution of weights at normal displacement:
 Armament: 1,339 tons, 4.5 %
 Armour: 5,179 tons, 17.4 %
    - Belts: 1,158 tons, 3.9 %
    - Torpedo bulkhead: 597 tons, 2.0 %
    - Armament: 1,302 tons, 4.4 %
    - Armour Deck: 2,122 tons, 7.1 %
 Machinery: 8,774 tons, 29.5 %
 Hull, fittings & equipment: 10,869 tons, 36.5 %
 Fuel, ammunition & stores: 3,598 tons, 12.1 %
 Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
 Survivability (Non-critical penetrating hits needed to sink ship):
   26,053 lbs / 11,817 Kg = 30.2 x 12.0 " / 305 mm shells or 2.9 torpedoes
 Stability (Unstable if below 1.00): 1.21
 Metacentric height 5.6 ft / 1.7 m
 Roll period: 15.1 seconds
 Steadiness - As gun platform (Average = 50 %): 59 %
   - Recoil effect (Restricted arc if above 1.00): 0.61
 Seaboat quality  (Average = 1.00): 1.17

Hull form characteristics:
 Hull has rise forward of midbreak,
   a ram bow and a cruiser stern
 Block coefficient (normal/deep): 0.578 / 0.585
 Length to Beam Ratio: 9.41 : 1
 'Natural speed' for length: 28.28 kts
 Power going to wave formation at top speed: 53 %
 Trim (Max stability = 0, Max steadiness = 100): 50
 Bow angle (Positive = bow angles forward): 0.00 degrees
 Stern overhang: -3.00 ft / -0.91 m
 Freeboard (% = length of deck as a percentage of waterline length):
    Fore end,  Aft end
    - Forecastle: 25.00 %,  33.00 ft / 10.06 m,  27.00 ft / 8.23 m
    - Forward deck: 43.00 %,  27.00 ft / 8.23 m,  27.00 ft / 8.23 m
    - Aft deck: 17.00 %,  19.00 ft / 5.79 m,  19.00 ft / 5.79 m
    - Quarter deck: 15.00 %,  19.00 ft / 5.79 m,  21.00 ft / 6.40 m
    - Average freeboard:  25.19 ft / 7.68 m

Ship space, strength and comments:
 Space - Hull below water (magazines/engines, low = better): 152.4 %
  - Above water (accommodation/working, high = better): 202.8 %
 Waterplane Area: 48,720 Square feet or 4,526 Square metres
 Displacement factor (Displacement / loading): 101 %
 Structure weight / hull surface area: 155 lbs/sq ft or 757 Kg/sq metre
 Hull strength (Relative):
  - Cross-sectional: 0.99
  - Longitudinal: 1.09
  - Overall: 1.00
 Hull space for machinery, storage, compartmentation is cramped
 Room for accommodation and workspaces is excellent

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