The GB/BB/1905 design study

This actually may have been more than a design study, as my friend Cliff was seriously thinking of producing the ships in numbers. It represents his ideas about speed and protection, with gunpower being secondary to those characteristics. This is a 29,000 ton Standard battleship with 9-12in/50 and 8-6in QF guns. The armour basis is 14in and the deck ended up as 4.4in. The speed is 25 knots with a range of 7,500nm. This is the Springsharp report:

GB/BB/1909 design study, Great Britain Battleship laid down 1909

Displacement:
 27,924 t light; 29,012 t standard; 32,445 t normal; 35,191 t full load

Dimensions: Length overall / water x beam x draught
 650.00 ft / 650.00 ft x 100.00 ft x 28.70 ft (normal load)
 198.12 m / 198.12 m x 30.48 m  x 8.75 m

Armament:
      9 - 12.00" / 305 mm guns (3x3 guns), 864.00lbs / 391.90kg shells, 1909 Model
   Breech loading guns in turrets (on barbettes)
   on centreline ends, majority forward, 1 raised mount - superfiring
      8 - 6.00" / 152 mm guns in single mounts, 108.00lbs / 48.99kg shells, 1909 Model
   Quick firing guns in deck mounts with hoists
   on side, all amidships
 Weight of broadside 8,640 lbs / 3,919 kg
 Shells per gun, main battery: 90

Armour:
   - Belts:  Width (max) Length (avg)  Height (avg)
 Main: 14.0" / 356 mm 390.00 ft / 118.87 m 16.00 ft / 4.88 m
 Ends: 5.00" / 127 mm 215.00 ft / 65.53 m 16.00 ft / 4.88 m
   45.00 ft / 13.72 m Unarmoured ends
   Main Belt covers 92 % of normal length

   - Torpedo Bulkhead:
  2.00" / 51 mm 390.00 ft / 118.87 m 28.00 ft / 8.53 m

   - Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
 Main: 14.0" / 356 mm 9.00" / 229 mm  14.0" / 356 mm
 2nd: 4.00" / 102 mm 4.00" / 102 mm  4.00" / 102 mm

   - Armour deck: 4.40" / 112 mm, Conning tower: 14.00" / 356 mm

Machinery:
 Oil fired boilers, steam turbines, 
 Direct drive, 4 shafts, 69,958 shp / 52,189 Kw = 25.00 kts
 Range 7,500nm at 15.00 kts
 Bunker at max displacement = 6,179 tons

Complement:
 1,208 - 1,571

Cost:
 £2.330 million / $9.319 million

Distribution of weights at normal displacement:
 Armament: 1,080 tons, 3.3 %
 Armour: 12,222 tons, 37.7 %
    - Belts: 4,526 tons, 14.0 %
    - Torpedo bulkhead: 808 tons, 2.5 %
    - Armament: 2,679 tons, 8.3 %
    - Armour Deck: 3,901 tons, 12.0 %
    - Conning Tower: 307 tons, 0.9 %
 Machinery: 3,180 tons, 9.8 %
 Hull, fittings & equipment: 11,442 tons, 35.3 %
 Fuel, ammunition & stores: 4,521 tons, 13.9 %
 Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
 Survivability (Non-critical penetrating hits needed to sink ship):
   61,681 lbs / 27,978 Kg = 71.4 x 12.0 " / 305 mm shells or 10.6 torpedoes
 Stability (Unstable if below 1.00): 1.15
 Metacentric height 6.5 ft / 2.0 m
 Roll period: 16.4 seconds
 Steadiness - As gun platform (Average = 50 %): 74 %
   - Recoil effect (Restricted arc if above 1.00): 0.47
 Seaboat quality  (Average = 1.00): 1.48

Hull form characteristics:
 Hull has rise forward of midbreak
 Block coefficient: 0.609
 Length to Beam Ratio: 6.50 : 1
 'Natural speed' for length: 25.50 kts
 Power going to wave formation at top speed: 50 %
 Trim (Max stability = 0, Max steadiness = 100): 50
 Bow angle (Positive = bow angles forward): -2.00 degrees
 Stern overhang: -2.00 ft / -0.61 m
 Freeboard (% = measuring location as a percentage of overall length):
    - Stem:  31.00 ft / 9.45 m
    - Forecastle (20 %): 27.00 ft / 8.23 m
    - Mid (66 %):  27.00 ft / 8.23 m (19.00 ft / 5.79 m aft of break)
    - Quarterdeck (15 %): 19.00 ft / 5.79 m
    - Stern:  19.00 ft / 5.79 m
    - Average freeboard: 24.60 ft / 7.50 m

Ship space, strength and comments:
 Space - Hull below water (magazines/engines, low = better): 71.9 %
  - Above water (accommodation/working, high = better): 186.4 %
 Waterplane Area: 47,929 Square feet or 4,453 Square metres
 Displacement factor (Displacement / loading): 119 %
 Structure weight / hull surface area: 170 lbs/sq ft or 828 Kg/sq metre
 Hull strength (Relative):
  - Cross-sectional: 0.95
  - Longitudinal: 1.60
  - 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
 Good seaboat, rides out heavy weather easily