The Super Lion design (GB/CB/1912) from the Blue Book

The Blue Book version of the Super Lion design is very expansive, if under-armoured. I have an inboard profile of a 812ft long ship with 10-15in guns and the armouring plan. I extrapolated that into a Springsharp design. The normal displacement I used is 45,000 tons. I added a 12-6in QF gun secondary armament with guns in shields with armoured hoists. There is a patch of 8in side armour of limited length, with large areas covered by 4in armour. The speed is a very fast 33 knots. This is the Springsharp report:

GB/CB/1912 (Super Lion), Great Britain Battlecruiser laid down 1912 (Engine 1917)

Displacement:
 38,412 t light; 40,354 t standard; 45,000 t normal; 48,717 t full load

Dimensions: Length overall / water x beam x draught
 812.00 ft / 812.00 ft x 104.00 ft x 32.00 ft (normal load)
 247.50 m / 247.50 m x 31.70 m  x 9.75 m

Armament:
      8 - 15.00" / 381 mm guns (4x2 guns), 1,920.00lbs / 870.90kg shells, 1912 Model
   Breech loading guns in turrets (on barbettes)
   on centreline ends, evenly spread, 2 raised mounts - superfiring
      2 - 15.00" / 381 mm guns (1x2 guns), 1,920.00lbs / 870.90kg shells, 1912 Model
   Breech loading guns in a turret (on a barbette)
   on centreline amidships
      12 - 6.00" / 152 mm guns in single mounts, 100.00lbs / 45.36kg shells, 1912 Model
   Quick firing guns in deck mounts with hoists
   on side, all amidships, 4 raised mounts - superfiring
 Weight of broadside 20,400 lbs / 9,253 kg
 Shells per gun, main battery: 90

Armour:
   - Belts:  Width (max) Length (avg)  Height (avg)
 Main: 8.00" / 203 mm 280.00 ft / 85.34 m 9.00 ft / 2.74 m
 Ends: 4.00" / 102 mm 405.00 ft / 123.44 m 9.00 ft / 2.74 m
   127.00 ft / 38.71 m Unarmoured ends
 Upper: 4.00" / 102 mm 655.00 ft / 199.64 m 8.00 ft / 2.44 m
   Main Belt covers 53 % of normal length
   Main belt does not fully cover magazines and engineering spaces

   - Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
 Main: 8.00" / 203 mm 4.00" / 102 mm  8.00" / 203 mm
 2nd: 4.00" / 102 mm 4.00" / 102 mm  4.00" / 102 mm

   - Armour deck: 3.00" / 76 mm, Conning tower: 8.00" / 203 mm

Machinery:
 Oil fired boilers, steam turbines, 
 Direct drive, 4 shafts, 229,000 shp / 170,834 Kw = 33.00 kts
 Range 7,800nm at 18.00 kts
 Bunker at max displacement = 8,362 tons

Complement:
 1,544 - 2,008

Cost:
 £4.428 million / $17.710 million

Distribution of weights at normal displacement:
 Armament: 2,271 tons, 5.0 %
 Armour: 8,350 tons, 18.6 %
    - Belts: 2,399 tons, 5.3 %
    - Torpedo bulkhead: 0 tons, 0.0 %
    - Armament: 2,360 tons, 5.2 %
    - Armour Deck: 3,373 tons, 7.5 %
    - Conning Tower: 218 tons, 0.5 %
 Machinery: 8,394 tons, 18.7 %
 Hull, fittings & equipment: 19,396 tons, 43.1 %
 Fuel, ammunition & stores: 6,588 tons, 14.6 %
 Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
 Survivability (Non-critical penetrating hits needed to sink ship):
   50,970 lbs / 23,120 Kg = 30.2 x 15.0 " / 381 mm shells or 3.3 torpedoes
 Stability (Unstable if below 1.00): 1.14
 Metacentric height 6.8 ft / 2.1 m
 Roll period: 16.8 seconds
 Steadiness - As gun platform (Average = 50 %): 54 %
   - Recoil effect (Restricted arc if above 1.00): 0.92
 Seaboat quality  (Average = 1.00): 1.08

Hull form characteristics:
 Hull has rise forward of midbreak
 Block coefficient: 0.583
 Length to Beam Ratio: 7.81 : 1
 'Natural speed' for length: 28.50 kts
 Power going to wave formation at top speed: 56 %
 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:  35.00 ft / 10.67 m
    - Forecastle (20 %): 30.00 ft / 9.14 m
    - Mid (71 %):  30.00 ft / 9.14 m (22.00 ft / 6.71 m aft of break)
    - Quarterdeck (15 %): 22.00 ft / 6.71 m
    - Stern:  22.00 ft / 6.71 m
    - Average freeboard: 28.08 ft / 8.56 m

Ship space, strength and comments:
 Space - Hull below water (magazines/engines, low = better): 98.5 %
  - Above water (accommodation/working, high = better): 212.0 %
 Waterplane Area: 60,779 Square feet or 5,647 Square metres
 Displacement factor (Displacement / loading): 104 %
 Structure weight / hull surface area: 217 lbs/sq ft or 1,062 Kg/sq metre
 Hull strength (Relative):
  - Cross-sectional: 0.96
  - Longitudinal: 1.56
  - Overall: 1.00
 Hull space for machinery, storage, compartmentation is adequate
 Room for accommodation and workspaces is excellent