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Saturday, March 17, 2007

Springsharp forced me to use geared turbines

For my anachronistic Agincourt design, to make Springsharp "happy" required that I use geared turbines for the drive, due to the machinery date. This is my original pencil drawing:

The 12in guns are in two quadruple and two triple turrets, with the triple in the superfiring position. I gave up and used oil fuel, since that seemed to be necessary to make the design work better. The 20-6in guns are in four triple and four twin turrets. This is the Springsharp 3.0b1 Beta report:
Agincourt, anachronistic, Great Britain Battleship laid down 1916 (Engine 1919)

Displacement:
 25,197 t light; 26,518 t standard; 27,503 t normal; 28,291 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
 (675.91 ft / 671.00 ft) x 89.00 ft x (27.00 / 27.63 ft)
 (206.02 m / 204.52 m) x 27.13 m  x (8.23 / 8.42 m)

Armament:
      14 - 12.00" / 305 mm 45.0 cal guns - 850.00lbs / 385.55kg shells, 90 per gun
   Breech loading guns in turret on barbette mounts , 1916 Model
   4 x Triple mounts on centreline ends, evenly spread
  2 raised mounts - superfiring
      20 - 6.00" / 152 mm 45.0 cal guns - 100.00lbs / 45.36kg shells, 150 per gun
   Quick firing guns in turret on barbette mounts , 1916 Model
   4 x Twin mounts on sides, evenly spread
  4 raised mounts
   4 x Triple mounts on sides amidships
      10 - 3.00" / 76.2 mm 50.0 cal guns - 12.00lbs / 5.44kg shells, 150 per gun
   Quick firing guns in deck and hoist mounts , 1916 Model
   4 x Twin mounts on sides, evenly spread
  4 raised mounts
   1 x Twin mount on centreline, aft deck forward
  1 raised mount
 Weight of broadside 14,020 lbs / 14,020 kg

Armour:
   - Belts:  Width (max) Length (avg)  Height (avg)
 Main: 9.00" / 229 mm 440.00 ft / 134.11 m 8.00 ft / 2.44 m
 Ends: 5.00" / 127 mm 200.00 ft / 60.96 m 8.00 ft / 2.44 m
   31.00 ft / 9.45 m Unarmoured ends
 Upper: 6.00" / 152 mm 440.00 ft / 134.11 m 8.00 ft / 2.44 m
   Main Belt covers 101 % of normal length

   - Torpedo Bulkhead:
  2.00" / 51 mm 440.00 ft / 134.11 m 27.00 ft / 8.23 m

   - Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
 Main: 9.00" / 229 mm 6.00" / 152 mm  9.00" / 229 mm
 2nd: 5.00" / 127 mm 4.00" / 102 mm  5.00" / 127 mm
 3rd: 3.00" / 76 mm 2.00" / 51 mm  2.00" / 51 mm

   - Armour deck: 3.00" / 76 mm, Conning tower: 9.00" / 229 mm

Machinery:
 Oil fired boilers, steam turbines, 
 Geared drive, 4 shafts, 52,378 shp / 39,074 Kw = 24.00 kts
 Range 5,400nm at 12.00 kts
 Bunker at max displacement = 1,772 tons

Complement:
 1,067 - 1,388

Cost:
 £4.095 million / $16.382 million

Distribution of weights at normal displacement:
 Armament: 2,702 tons, 9.8 %
 Armour: 9,390 tons, 34.1 %
    - Belts: 2,561 tons, 9.3 %
    - Torpedo bulkhead: 879 tons, 3.2 %
    - Armament: 3,355 tons, 12.2 %
    - Armour Deck: 2,417 tons, 8.8 %
    - Conning Tower: 177 tons, 0.6 %
 Machinery: 1,860 tons, 6.8 %
 Hull, fittings & equipment: 12,328 tons, 44.8 %
 Fuel, ammunition & stores: 2,306 tons, 8.4 %
 Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
 Survivability (Non-critical penetrating hits needed to sink ship):
   46,458 lbs / 21,073 Kg = 53.8 x 12.0 " / 305 mm shells or 7.2 torpedoes
 Stability (Unstable if below 1.00): 1.15
 Metacentric height 5.4 ft / 1.7 m
 Roll period: 16.0 seconds
 Steadiness - As gun platform (Average = 50 %): 41 %
   - Recoil effect (Restricted arc if above 1.00): 0.94
 Seaboat quality  (Average = 1.00): 1.32

Hull form characteristics:
 Hull has a flush deck,
   a normal bow and a cruiser stern
 Block coefficient (normal/deep): 0.597 / 0.600
 Length to Beam Ratio: 7.54 : 1
 'Natural speed' for length: 25.90 kts
 Power going to wave formation at top speed: 45 %
 Trim (Max stability = 0, Max steadiness = 100): 25
 Bow angle (Positive = bow angles forward): 9.00 degrees
 Stern overhang: 0.00 ft / 0.00 m
 Freeboard (% = length of deck as a percentage of waterline length):
    Fore end,  Aft end
    - Forecastle: 20.00 %,  31.00 ft / 9.45 m,  26.00 ft / 7.92 m
    - Forward deck: 30.00 %,  26.00 ft / 7.92 m,  24.00 ft / 7.32 m
    - Aft deck: 35.00 %,  24.00 ft / 7.32 m,  24.00 ft / 7.32 m
    - Quarter deck: 15.00 %,  24.00 ft / 7.32 m,  24.00 ft / 7.32 m
    - Average freeboard:  25.10 ft / 7.65 m

Ship space, strength and comments:
 Space - Hull below water (magazines/engines, low = better): 86.1 %
  - Above water (accommodation/working, high = better): 190.2 %
 Waterplane Area: 43,555 Square feet or 4,046 Square metres
 Displacement factor (Displacement / loading): 106 %
 Structure weight / hull surface area: 192 lbs/sq ft or 938 Kg/sq metre
 Hull strength (Relative):
  - Cross-sectional: 0.95
  - Longitudinal: 1.61
  - Overall: 1.00
 Hull space for machinery, storage, compartmentation is adequate
 Room for accommodation and workspaces is excellent
 Good seaboat, rides out heavy weather easily

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