A "Moderate Dimensions" Battleship

The next page in the Red Book is a "Moderate Dimensions" battleship that would have made Charles Beresford happy. There is the pencil sketch, and some specifications. I elaborated on what was there to produce a Springsharp design. I suspect that the design was German, so I went forward on that basis, with my usual "Alternate History" variations. There are two turrets forward with big guns for the size of the ship, one superfiring. The belt is short, but that was the intent. I decided the 23 knots was adequate for the design, given that it is practically a coast defence ship. The resulting Springsharp design was quite acceptable, although it depends on light-weight machinery:

Ger/BB/1915 small, Germany Battleship laid down 1915 (Engine 1923)

Displacement:
 25,565 t light; 26,796 t standard; 28,600 t normal; 30,043 t full load

Dimensions: Length overall / water x beam x draught
 625.00 ft / 625.00 ft x 100.00 ft x 24.40 ft (normal load)
 190.50 m / 190.50 m x 30.48 m  x 7.44 m

Armament:
      6 - 16.00" / 406 mm guns (2x3 guns), 2,048.00lbs / 928.96kg shells, 1915 Model
   Breech loading guns in turrets (on barbettes)
   on centreline, all forward, 1 raised mount - superfiring
      12 - 5.00" / 127 mm guns in single mounts, 62.50lbs / 28.35kg shells, 1915 Model
   Quick firing guns in deck mounts with hoists
   on side, all amidships
 Weight of broadside 13,038 lbs / 5,914 kg
 Shells per gun, main battery: 90

Armour:
   - Belts:  Width (max) Length (avg)  Height (avg)
 Main: 14.0" / 356 mm 320.00 ft / 97.54 m 8.00 ft / 2.44 m
 Ends: Unarmoured
 Upper: 10.0" / 254 mm 320.00 ft / 97.54 m 8.00 ft / 2.44 m
   Main Belt covers 79 % of normal length

   - Torpedo Bulkhead:
  4.00" / 102 mm 320.00 ft / 97.54 m 24.00 ft / 7.32 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: 3.00" / 76 mm, Conning tower: 14.00" / 356 mm

Machinery:
 Oil fired boilers, steam turbines, 
 Geared drive, 4 shafts, 49,139 shp / 36,658 Kw = 23.00 kts
 Range 6,500nm at 15.00 kts
 Bunker at max displacement = 3,246 tons

Complement:
 1,099 - 1,429

Cost:
 £3.627 million / $14.509 million

Distribution of weights at normal displacement:
 Armament: 1,630 tons, 5.7 %
 Armour: 9,648 tons, 33.7 %
    - Belts: 2,870 tons, 10.0 %
    - Torpedo bulkhead: 1,137 tons, 4.0 %
    - Armament: 2,687 tons, 9.4 %
    - Armour Deck: 2,673 tons, 9.3 %
    - Conning Tower: 282 tons, 1.0 %
 Machinery: 1,642 tons, 5.7 %
 Hull, fittings & equipment: 12,645 tons, 44.2 %
 Fuel, ammunition & stores: 3,035 tons, 10.6 %
 Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
 Survivability (Non-critical penetrating hits needed to sink ship):
   51,116 lbs / 23,186 Kg = 25.0 x 16.0 " / 406 mm shells or 9.6 torpedoes
 Stability (Unstable if below 1.00): 1.11
 Metacentric height 6.1 ft / 1.9 m
 Roll period: 17.0 seconds
 Steadiness - As gun platform (Average = 50 %): 73 %
   - Recoil effect (Restricted arc if above 1.00): 0.75
 Seaboat quality  (Average = 1.00): 1.47

Hull form characteristics:
 Hull has rise forward of midbreak
 Block coefficient: 0.656
 Length to Beam Ratio: 6.25 : 1
 'Natural speed' for length: 25.00 kts
 Power going to wave formation at top speed: 47 %
 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:  28.00 ft / 8.53 m
    - Forecastle (20 %): 25.00 ft / 7.62 m
    - Mid (67 %):  25.00 ft / 7.62 m (17.00 ft / 5.18 m aft of break)
    - Quarterdeck (15 %): 17.00 ft / 5.18 m
    - Stern:  17.00 ft / 5.18 m
    - Average freeboard: 22.60 ft / 6.89 m

Ship space, strength and comments:
 Space - Hull below water (magazines/engines, low = better): 77.1 %
  - Above water (accommodation/working, high = better): 190.2 %
 Waterplane Area: 48,160 Square feet or 4,474 Square metres
 Displacement factor (Displacement / loading): 110 %
 Structure weight / hull surface area: 198 lbs/sq ft or 965 Kg/sq metre
 Hull strength (Relative):
  - Cross-sectional: 0.94
  - Longitudinal: 1.75
  - 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