A better approach to more speed

A better way to reach higher speed is to increase the length. By doing that, I provided better protection, while achieving better seakeeping and slightly less draft, although too great at 38ft. The new dimensions were 950ft x 110ft x 38ft with a displacement of 47,500 tons. The speed was still 42 knots. The armament was the same with 6-18in and 12-5in QF guns. This is the final Springsharp report:

GB/CB/1916 Design Study Alt-2, Great Britain Battlecruiser laid down 1916 (Engine 1950)

Displacement:
 43,592 t light; 46,075 t standard; 47,500 t normal; 48,640 t full load

Dimensions: Length overall / water x beam x draught
 951.99 ft / 950.00 ft x 110.00 ft x 38.00 ft (normal load)
 290.17 m / 289.56 m x 33.53 m  x 11.58 m

Armament:
      6 - 18.00" / 457 mm guns (2x3 guns), 2,916.00lbs / 1,322.68kg shells, 1916 Model
   Breech loading guns in turrets (on barbettes)
   on centreline ends, evenly spread
      12 - 5.00" / 127 mm guns in single mounts, 62.50lbs / 28.35kg shells, 1916 Model
   Quick firing guns in deck mounts with hoists
   on side, all amidships
 Weight of broadside 18,246 lbs / 8,276 kg
 Shells per gun, main battery: 150

Armour:
   - Belts:  Width (max) Length (avg)  Height (avg)
 Main: 4.00" / 102 mm 640.00 ft / 195.07 m 9.00 ft / 2.74 m
 Ends: Unarmoured
   Main Belt covers 104 % of normal length
   Main belt does not fully cover magazines and engineering spaces

   - Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
 Main: 6.00" / 152 mm 4.00" / 102 mm  6.00" / 152 mm

   - Armour deck: 2.00" / 51 mm, Conning tower: 6.00" / 152 mm

Machinery:
 Oil fired boilers, steam turbines, 
 Geared drive, 8 shafts, 535,448 shp / 399,444 Kw = 42.00 kts
 Range 4,500nm at 15.00 kts
 Bunker at max displacement = 2,565 tons

Complement:
 1,608 - 2,091

Cost:
 £8.566 million / $34.265 million

Distribution of weights at normal displacement:
 Armament: 2,281 tons, 4.8 %
 Armour: 4,899 tons, 10.3 %
    - Belts: 960 tons, 2.0 %
    - Torpedo bulkhead: 0 tons, 0.0 %
    - Armament: 1,362 tons, 2.9 %
    - Armour Deck: 2,408 tons, 5.1 %
    - Conning Tower: 170 tons, 0.4 %
 Machinery: 12,810 tons, 27.0 %
 Hull, fittings & equipment: 23,602 tons, 49.7 %
 Fuel, ammunition & stores: 3,908 tons, 8.2 %
 Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
 Survivability (Non-critical penetrating hits needed to sink ship):
   38,157 lbs / 17,308 Kg = 13.1 x 18.0 " / 457 mm shells or 2.7 torpedoes
 Stability (Unstable if below 1.00): 1.17
 Metacentric height 7.8 ft / 2.4 m
 Roll period: 16.6 seconds
 Steadiness - As gun platform (Average = 50 %): 55 %
   - Recoil effect (Restricted arc if above 1.00): 0.69
 Seaboat quality  (Average = 1.00): 1.10

Hull form characteristics:
 Hull has a flush deck
 Block coefficient: 0.419
 Length to Beam Ratio: 8.64 : 1
 'Natural speed' for length: 30.82 kts
 Power going to wave formation at top speed: 58 %
 Trim (Max stability = 0, Max steadiness = 100): 50
 Bow angle (Positive = bow angles forward): 3.00 degrees
 Stern overhang: -2.00 ft / -0.61 m
 Freeboard (% = measuring location as a percentage of overall length):
    - Stem:  38.00 ft / 11.58 m
    - Forecastle (20 %): 33.00 ft / 10.06 m
    - Mid (50 %):  33.00 ft / 10.06 m
    - Quarterdeck (15 %): 33.00 ft / 10.06 m
    - Stern:  33.00 ft / 10.06 m
    - Average freeboard: 33.40 ft / 10.18 m

Ship space, strength and comments:
 Space - Hull below water (magazines/engines, low = better): 124.3 %
  - Above water (accommodation/working, high = better): 254.4 %
 Waterplane Area: 65,089 Square feet or 6,047 Square metres
 Displacement factor (Displacement / loading): 97 %
 Structure weight / hull surface area: 226 lbs/sq ft or 1,105 Kg/sq metre
 Hull strength (Relative):
  - Cross-sectional: 0.93
  - Longitudinal: 2.00
  - Overall: 1.00
 Hull space for machinery, storage, compartmentation is cramped
 Room for accommodation and workspaces is excellent