Amazon Ad

Thursday, May 25, 2006

The Ger/BB/1916 Large can easily be made faster

I thought the Ger/BB/1916 Large design would be a more effective ship if the speed were higher. It really did not take very much to achieve that. I thought that 27 knots would be adequate. That was the target speed for the American WWII fast battleships North Carolina and Washington. About all that was required was more displacement. This is the revised Springsharp report:
Ger/BB/1916 Large Mod.A Red Book, Germany Battleship laid down 1916 (Engine 1923)

Displacement:
 85,001 t light; 88,989 t standard; 92,534 t normal; 95,370 t full load

Dimensions: Length overall / water x beam x draught
 905.80 ft / 900.00 ft x 150.00 ft x 35.70 ft (normal load)
 276.09 m / 274.32 m x 45.72 m  x 10.88 m

Armament:
      10 - 21.00" / 533 mm guns (4 mounts), 4,630.50lbs / 2,100.36kg shells, 1916 Model
   Breech loading guns in turrets (on barbettes)
   on centreline ends, evenly spread, 2 raised mounts - superfiring
      24 - 5.00" / 127 mm guns (12x2 guns), 62.50lbs / 28.35kg shells, 1916 Model
   Quick firing guns in turrets (on barbettes)
   on side, all amidships, 4 raised mounts - superfiring
 Weight of broadside 47,805 lbs / 21,684 kg
 Shells per gun, main battery: 80

Armour:
   - Belts:  Width (max) Length (avg)  Height (avg)
 Main: 18.0" / 457 mm 505.00 ft / 153.92 m 9.00 ft / 2.74 m
 Ends: Unarmoured
 Upper: 16.0" / 406 mm 505.00 ft / 153.92 m 8.00 ft / 2.44 m
   Main Belt covers 86 % of normal length

   - Torpedo Bulkhead:
  8.00" / 203 mm 505.00 ft / 153.92 m 35.00 ft / 10.67 m

   - Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
 Main: 12.0" / 305 mm 8.00" / 203 mm  16.0" / 406 mm
 2nd: 4.00" / 102 mm 4.00" / 102 mm  4.00" / 102 mm

   - Armour deck: 8.00" / 203 mm, Conning tower: 18.00" / 457 mm

Machinery:
 Oil fired boilers, steam turbines, 
 Geared drive, 4 shafts, 169,236 shp / 126,250 Kw = 27.00 kts
 Range 6,000nm at 15.00 kts
 Bunker at max displacement = 6,381 tons

Complement:
 2,652 - 3,448

Cost:
 £14.378 million / $57.511 million

Distribution of weights at normal displacement:
 Armament: 5,976 tons, 6.5 %
 Armour: 36,615 tons, 39.6 %
    - Belts: 6,731 tons, 7.3 %
    - Torpedo bulkhead: 5,232 tons, 5.7 %
    - Armament: 8,243 tons, 8.9 %
    - Armour Deck: 15,616 tons, 16.9 %
    - Conning Tower: 793 tons, 0.9 %
 Machinery: 5,656 tons, 6.1 %
 Hull, fittings & equipment: 36,753 tons, 39.7 %
 Fuel, ammunition & stores: 7,534 tons, 8.1 %
 Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
 Survivability (Non-critical penetrating hits needed to sink ship):
   135,108 lbs / 61,284 Kg = 29.2 x 21.0 " / 533 mm shells or 29.9 torpedoes
 Stability (Unstable if below 1.00): 1.18
 Metacentric height 12.5 ft / 3.8 m
 Roll period: 17.8 seconds
 Steadiness - As gun platform (Average = 50 %): 60 %
   - Recoil effect (Restricted arc if above 1.00): 0.51
 Seaboat quality  (Average = 1.00): 1.21

Hull form characteristics:
 Hull has low forecastle
 Block coefficient: 0.672
 Length to Beam Ratio: 6.00 : 1
 'Natural speed' for length: 30.00 kts
 Power going to wave formation at top speed: 48 %
 Trim (Max stability = 0, Max steadiness = 100): 50
 Bow angle (Positive = bow angles forward): 5.00 degrees
 Stern overhang: 3.00 ft / 0.91 m
 Freeboard (% = measuring location as a percentage of overall length):
    - Stem:  32.00 ft / 9.75 m
    - Forecastle (20 %): 25.00 ft / 7.62 m (27.00 ft / 8.23 m aft of break)
    - Mid (50 %):  25.00 ft / 7.62 m
    - Quarterdeck (15 %): 25.00 ft / 7.62 m
    - Stern:  25.00 ft / 7.62 m
    - Average freeboard: 25.86 ft / 7.88 m
 Ship tends to be wet forward

Ship space, strength and comments:
 Space - Hull below water (magazines/engines, low = better): 78.5 %
  - Above water (accommodation/working, high = better): 193.0 %
 Waterplane Area: 105,513 Square feet or 9,803 Square metres
 Displacement factor (Displacement / loading): 97 %
 Structure weight / hull surface area: 277 lbs/sq ft or 1,352 Kg/sq metre
 Hull strength (Relative):
  - Cross-sectional: 0.98
  - Longitudinal: 1.22
  - Overall: 1.00
 Hull space for machinery, storage, compartmentation is excellent
 Room for accommodation and workspaces is excellent
 Good seaboat, rides out heavy weather easily

No comments:

Amazon Context Links