The "Ultra Fast" version of the GB/CB/1910 design

My 1972 or 1973 version of the GB/CB/1910 battlecruiser design was intended to be very fast. The speed was too fast for what was feasible, sadly. I had thought that 300,000 SHP might be possible, and that seems to be true. This design was intended to have a thicker belt, although 9in is just a guess. The armament was 4-13.5in/45 BLR and 8-4in QF guns. What is remarkable is that the normal displacement is what was intended. This is the Springsharp report:

GB/CB/1910 Ultra Fast, Great Britain Battlecruiser laid down 1910 (Engine 1933)

Displacement:
 29,611 t light; 30,557 t standard; 33,000 t normal; 34,954 t full load

Dimensions: Length overall / water x beam x draught
 775.00 ft / 775.00 ft x 90.00 ft x 31.00 ft (normal load)
 236.22 m / 236.22 m x 27.43 m  x 9.45 m

Armament:
      4 - 13.50" / 343 mm guns (2x2 guns), 1,350.00lbs / 612.35kg shells, 1910 Model
   Breech loading guns in turrets (on barbettes)
   on centreline ends, evenly spread
      8 - 4.00" / 102 mm guns (4x2 guns), 32.00lbs / 14.51kg shells, 1910 Model
   Quick firing guns in deck mounts with hoists
   on side, all amidships, 2 raised mounts - superfiring
 Weight of broadside 5,656 lbs / 2,566 kg
 Shells per gun, main battery: 90

Armour:
   - Belts:  Width (max) Length (avg)  Height (avg)
 Main: 9.00" / 229 mm 620.00 ft / 188.98 m 17.00 ft / 5.18 m
 Ends: Unarmoured
   Main Belt covers 123 % of normal length
   Main belt does not fully cover magazines and engineering spaces

   - Torpedo Bulkhead:
  1.50" / 38 mm 620.00 ft / 188.98 m 27.00 ft / 8.23 m

   - Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
 Main: 9.00" / 229 mm 6.00" / 152 mm  8.00" / 203 mm
 2nd: 2.00" / 51 mm       -         -

   - Armour deck: 2.50" / 64 mm, Conning tower: 8.00" / 203 mm

Machinery:
 Oil fired boilers, steam turbines, 
 Direct drive, 4 shafts, 295,918 shp / 220,755 Kw = 37.00 kts
 Range 6,200nm at 18.00 kts
 Bunker at max displacement = 4,397 tons

Complement:
 1,223 - 1,591

Cost:
 £2.787 million / $11.148 million

Distribution of weights at normal displacement:
 Armament: 647 tons, 2.0 %
 Armour: 8,173 tons, 24.8 %
    - Belts: 3,869 tons, 11.7 %
    - Torpedo bulkhead: 929 tons, 2.8 %
    - Armament: 979 tons, 3.0 %
    - Armour Deck: 2,218 tons, 6.7 %
    - Conning Tower: 177 tons, 0.5 %
 Machinery: 8,622 tons, 26.1 %
 Hull, fittings & equipment: 12,169 tons, 36.9 %
 Fuel, ammunition & stores: 3,389 tons, 10.3 %
 Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
 Survivability (Non-critical penetrating hits needed to sink ship):
   41,243 lbs / 18,707 Kg = 33.5 x 13.5 " / 343 mm shells or 4.5 torpedoes
 Stability (Unstable if below 1.00): 1.24
 Metacentric height 6.3 ft / 1.9 m
 Roll period: 15.0 seconds
 Steadiness - As gun platform (Average = 50 %): 53 %
   - Recoil effect (Restricted arc if above 1.00): 0.37
 Seaboat quality  (Average = 1.00): 1.06

Hull form characteristics:
 Hull has rise forward of midbreak
 Block coefficient: 0.534
 Length to Beam Ratio: 8.61 : 1
 'Natural speed' for length: 27.84 kts
 Power going to wave formation at top speed: 61 %
 Trim (Max stability = 0, Max steadiness = 100): 50
 Bow angle (Positive = bow angles forward): -1.00 degrees
 Stern overhang: -1.00 ft / -0.30 m
 Freeboard (% = measuring location as a percentage of overall length):
    - Stem:  35.00 ft / 10.67 m
    - Forecastle (20 %): 32.00 ft / 9.75 m
    - Mid (67 %):  32.00 ft / 9.75 m (24.00 ft / 7.32 m aft of break)
    - Quarterdeck (15 %): 24.00 ft / 7.32 m
    - Stern:  24.00 ft / 7.32 m
    - Average freeboard: 29.60 ft / 9.02 m

Ship space, strength and comments:
 Space - Hull below water (magazines/engines, low = better): 128.3 %
  - Above water (accommodation/working, high = better): 222.5 %
 Waterplane Area: 47,962 Square feet or 4,456 Square metres
 Displacement factor (Displacement / loading): 108 %
 Structure weight / hull surface area: 159 lbs/sq ft or 774 Kg/sq metre
 Hull strength (Relative):
  - Cross-sectional: 0.95
  - Longitudinal: 1.70
  - Overall: 1.00
 Hull space for machinery, storage, compartmentation is cramped
 Room for accommodation and workspaces is excellent