The Ger/BB/1909 design concept

The 1909 design for a 24 knot ship with 9-12in/50 guns and 8-6in QF guns with dimensions of 640ft x 105ft x 26.9 ft was probably the genesis for the Ger/BB/1909 design, not a British design. The version that I actually took to a more detailed design had a 30ft draft and a greater displacement. I used that for a Springsharp design:

Ger/BB/1909 original concept, Germany Battleship laid down 1909

Displacement:
 25,776 t light; 26,873 t standard; 29,664 t normal; 31,897 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
 (640.00 ft / 640.00 ft) x 105.00 ft x (30.00 / 31.72 ft)
 (195.07 m / 195.07 m) x 32.00 m  x (9.14 / 9.67 m)

Armament:
      9 - 12.00" / 305 mm 50.0 cal guns - 915.00lbs / 415.04kg shells, 90 per gun
   Breech loading guns in turret on barbette mounts, 1909 Model
   3 x Single mounts on centreline ends, majority forward
      8 - 6.00" / 152 mm 50.0 cal guns - 114.33lbs / 51.86kg shells, 180 per gun
   Quick firing guns in deck and hoist mounts, 1909 Model
   8 x Single mounts on sides amidships
      Weight of broadside 9,150 lbs / 4,150 kg

Armour:
   - Belts:  Width (max) Length (avg)  Height (avg)
 Main: 14.0" / 356 mm 365.00 ft / 111.25 m 16.00 ft / 4.88 m
 Ends: Unarmoured
   Main Belt covers 88 % of normal length

   - Torpedo Bulkhead:
  2.00" / 51 mm 365.00 ft / 111.25 m 30.00 ft / 9.14 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: 5.00" / 127 mm 3.00" / 76 mm  5.00" / 127 mm

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

   - Conning towers: Forward 14.00" / 356 mm,  Aft 0.00" / 0 mm

Machinery:
 Oil fired boilers, steam turbines, 
 Direct drive, 4 shafts, 64,449 shp / 48,079 Kw = 25.00 kts
 Range 6,500nm at 15.00 kts
 Bunker at max displacement = 5,025 tons

Complement:
 1,129 - 1,469

Cost:
 £2.262 million / $9.048 million

Distribution of weights at normal displacement:
 Armament: 2,268 tons, 7.6 %
 Armour: 10,201 tons, 34.4 %
    - Belts: 3,687 tons, 12.4 %
    - Torpedo bulkhead: 810 tons, 2.7 %
    - Armament: 2,877 tons, 9.7 %
    - Armour Deck: 2,538 tons, 8.6 %
    - Conning Tower: 289 tons, 1.0 %
 Machinery: 2,930 tons, 9.9 %
 Hull, fittings & equipment: 10,378 tons, 35.0 %
 Fuel, ammunition & stores: 3,888 tons, 13.1 %
 Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
 Survivability (Non-critical penetrating hits needed to sink ship):
   57,629 lbs / 26,140 Kg = 66.7 x 12.0 " / 305 mm shells or 9.9 torpedoes
 Stability (Unstable if below 1.00): 1.24
 Metacentric height 8.0 ft / 2.4 m
 Roll period: 15.6 seconds
 Steadiness - As gun platform (Average = 50 %): 89 %
   - Recoil effect (Restricted arc if above 1.00): 0.46
 Seaboat quality  (Average = 1.00): 1.79

Hull form characteristics:
 Hull has rise forward of midbreak,
   a normal bow and a cruiser stern
 Block coefficient (normal/deep): 0.515 / 0.524
 Length to Beam Ratio: 6.10 : 1
 'Natural speed' for length: 25.30 kts
 Power going to wave formation at top speed: 49 %
 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 (% = length of deck as a percentage of waterline length):
    Fore end,  Aft end
    - Forecastle: 30.00 %,  30.00 ft / 9.14 m,  29.00 ft / 8.84 m
    - Forward deck: 35.00 %,  29.00 ft / 8.84 m,  29.00 ft / 8.84 m
    - Aft deck: 20.00 %,  21.00 ft / 6.40 m,  21.00 ft / 6.40 m
    - Quarter deck: 15.00 %,  21.00 ft / 6.40 m,  21.00 ft / 6.40 m
    - Average freeboard:  26.32 ft / 8.02 m

Ship space, strength and comments:
 Space - Hull below water (magazines/engines, low = better): 75.9 %
  - Above water (accommodation/working, high = better): 199.8 %
 Waterplane Area: 45,394 Square feet or 4,217 Square metres
 Displacement factor (Displacement / loading): 118 %
 Structure weight / hull surface area: 176 lbs/sq ft or 861 Kg/sq metre
 Hull strength (Relative):
  - Cross-sectional: 0.92
  - Longitudinal: 2.12
  - 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