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Thursday, March 24, 2005

Springsharp gives a glowing report to the Ger/BB/1910 design

The Ger/BB/1910 design was intended to be about a 32,000 ton vessel with 14in armor and 9-12in/50 BLR with 8-6in/50 QF guns. The designed speed was 23 knots. The Springsharp report is quite glowing, and was easy to finalize. I only had to raise the displacement to 33,350 tons normal displacement to achieve suffiicent structural strength.
Ger/BB/1910, Germany Battleship laid down 1910 (Engine 1921)

Displacement:
 29,717 t light; 31,116 t standard; 33,350 t normal; 35,137 t full load

Dimensions: Length overall / water x beam x draught
 645.00 ft / 645.00 ft x 106.00 ft x 30.00 ft (normal load)
 196.60 m / 196.60 m x 32.31 m  x 9.14 m

Armament:
     9 - 12.00" / 305 mm guns (3x3 guns), 864.00lbs / 391.90kg shells, 1910 Model
   Breech loading guns in turrets (on barbettes)
   on centreline ends, majority forward, all raised mounts - superfiring
     8 - 6.00" / 152 mm guns in single mounts, 108.00lbs / 48.99kg shells, 1910 Model
   Quick firing guns in deck mounts with hoists
   on side, evenly spread, all raised mounts
 Weight of broadside 8,640 lbs / 3,919 kg
 Shells per gun, main battery: 150

Armour:
  - Belts:  Width (max) Length (avg)  Height (avg)
 Main: 14.0" / 356 mm 435.00 ft / 132.59 m 16.00 ft / 4.88 m
 Ends: Unarmoured
   Main Belt covers 104 % of normal length

  - Torpedo Bulkhead:
  2.00" / 51 mm 435.00 ft / 132.59 m 28.00 ft / 8.53 m

  - Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
 Main: 14.0" / 356 mm 6.00" / 152 mm  14.0" / 356 mm
 2nd: 2.00" / 51 mm       -         -

  - Armour deck: 6.00" / 152 mm, Conning tower: 14.00" / 356 mm

Machinery:
 Oil fired boilers, steam turbines,
 Direct drive, 4 shafts, 51,219 shp / 38,209 Kw = 23.00 kts
 Range 7,500nm at 15.00 kts
 Bunker at max displacement = 4,022 tons

Complement:
 1,233 - 1,604

Cost:
 £2.194 million / $8.777 million

Distribution of weights at normal displacement:
 Armament: 1,080 tons, 3.2 %
 Armour: 13,852 tons, 41.5 %
    - Belts: 4,241 tons, 12.7 %
    - Torpedo bulkhead: 901 tons, 2.7 %
    - Armament: 3,005 tons, 9.0 %
    - Armour Deck: 5,392 tons, 16.2 %
    - Conning Tower: 313 tons, 0.9 %
 Machinery: 1,764 tons, 5.3 %
 Hull, fittings & equipment: 13,021 tons, 39.0 %
 Fuel, ammunition & stores: 3,633 tons, 10.9 %
 Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
 Survivability (Non-critical penetrating hits needed to sink ship):
   84,733 lbs / 38,434 Kg = 98.1 x 12.0 " / 305 mm shells or 18.0 torpedoes
 Stability (Unstable if below 1.00): 1.03
 Metacentric height 5.8 ft / 1.8 m
 Roll period: 18.5 seconds
 Steadiness - As gun platform (Average = 50 %): 100 %
   - Recoil effect (Restricted arc if above 1.00): 0.76
 Seaboat quality  (Average = 1.00): 2.00

Hull form characteristics:
 Hull has rise forward of midbreak
 Block coefficient: 0.569
 Length to Beam Ratio: 6.08 : 1
 'Natural speed' for length: 25.40 kts
 Power going to wave formation at top speed: 46 %
 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:  32.00 ft / 9.75 m
    - Forecastle (20 %): 30.00 ft / 9.14 m
    - Mid (68 %):  30.00 ft / 9.14 m (23.00 ft / 7.01 m aft of break)
    - Quarterdeck (15 %): 23.00 ft / 7.01 m
    - Stern:  23.00 ft / 7.01 m
    - Average freeboard: 27.92 ft / 8.51 m

Ship space, strength and comments:
 Space - Hull below water (magazines/engines, low = better): 53.5 %
  - Above water (accommodation/working, high = better): 211.4 %
 Waterplane Area: 48,577 Square feet or 4,513 Square metres
 Displacement factor (Displacement / loading): 128 %
 Structure weight / hull surface area: 186 lbs/sq ft or 911 Kg/sq metre
 Hull strength (Relative):
  - Cross-sectional: 0.92
  - Longitudinal: 2.21
  - Overall: 1.00
 Hull space for machinery, storage, compartmentation is excellent
 Room for accommodation and workspaces is excellent
 Ship has slow, easy roll, a good, steady gun platform
 Excellent seaboat, comfortable, can fire her guns in the heaviest weather

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