The best attempt ever at the Super Fast Battlecruiser design

The next page in the Red Book is the pencil drawing of the inboard profile and specifications for the Super Fast Battlecruiser, dated 18 July 1973. This is the ship with a standard displacement of 32,000 tons and with an armament of 4-17in BLR and 16-4in QF guns. The speed goals were outrageous: 52 knots. This shot at the design attempts to be as faithful as possible to the weights, and still achieve a high speed. I am not sure why this Springsharp design is as good as it is, but by keeping the displacement low (to the specified 32,000 tons), and using the specified protection weight, I was able to obtain 39 knots with a cruising speed of 18 knots for 7,500nm. The armour basis is 4in with a 2in deck. The torpedo bulkhead is 1in. This is the Springsharp report:

GB/CB/1917 Super Fast, Great Britain Light Battlecruiser laid down 1917 (Engine 1950)

Displacement:
 28,354 t light; 29,517 t standard; 32,000 t normal; 33,986 t full load

Dimensions: Length overall / water x beam x draught
 801.33 ft / 800.00 ft x 85.00 ft x 31.00 ft (normal load)
 244.24 m / 243.84 m x 25.91 m  x 9.45 m

Armament:
      4 - 17.00" / 432 mm guns (2x2 guns), 2,456.50lbs / 1,114.25kg shells, 1917 Model
   Breech loading guns in turrets (on barbettes)
   on centreline ends, evenly spread
      4 - 4.00" / 102 mm guns (2x2 guns), 32.00lbs / 14.51kg shells, 1917 Model
   Quick firing guns in deck mounts with hoists
   on centreline ends, evenly spread, all raised mounts
      12 - 4.00" / 102 mm guns (6x2 guns), 32.00lbs / 14.51kg shells, 1917 Model
   Quick firing guns in deck mounts with hoists
   on side, evenly spread
 Weight of broadside 10,338 lbs / 4,689 kg
 Shells per gun, main battery: 90

Armour:
   - Belts:  Width (max) Length (avg)  Height (avg)
 Main: 4.00" / 102 mm 430.00 ft / 131.06 m 16.00 ft / 4.88 m
 Ends: Unarmoured
   Main Belt covers 83 % of normal length
   Main belt does not fully cover magazines and engineering spaces

   - Torpedo Bulkhead:
  1.00" / 25 mm 430.00 ft / 131.06 m 29.00 ft / 8.84 m

   - Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
 Main: 6.00" / 152 mm 4.00" / 102 mm  6.00" / 152 mm
 2nd: 2.00" / 51 mm 2.00" / 51 mm  2.00" / 51 mm

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

Machinery:
 Oil fired boilers, steam turbines, 
 Geared drive, 6 shafts, 350,060 shp / 261,145 Kw = 39.00 kts
 Range 7,500nm at 18.00 kts
 Bunker at max displacement = 4,469 tons

Complement:
 1,196 - 1,555

Cost:
 £5.910 million / $23.639 million

Distribution of weights at normal displacement:
 Armament: 1,292 tons, 4.0 %
 Armour: 4,526 tons, 14.1 %
    - Belts: 1,191 tons, 3.7 %
    - Torpedo bulkhead: 461 tons, 1.4 %
    - Armament: 1,018 tons, 3.2 %
    - Armour Deck: 1,725 tons, 5.4 %
    - Conning Tower: 130 tons, 0.4 %
 Machinery: 8,375 tons, 26.2 %
 Hull, fittings & equipment: 14,161 tons, 44.3 %
 Fuel, ammunition & stores: 3,646 tons, 11.4 %
 Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
 Survivability (Non-critical penetrating hits needed to sink ship):
   29,169 lbs / 13,231 Kg = 11.9 x 17.0 " / 432 mm shells or 2.9 torpedoes
 Stability (Unstable if below 1.00): 1.13
 Metacentric height 4.9 ft / 1.5 m
 Roll period: 16.1 seconds
 Steadiness - As gun platform (Average = 50 %): 54 %
   - Recoil effect (Restricted arc if above 1.00): 0.92
 Seaboat quality  (Average = 1.00): 1.07

Hull form characteristics:
 Hull has rise forward of midbreak
 Block coefficient: 0.531
 Length to Beam Ratio: 9.41 : 1
 'Natural speed' for length: 28.28 kts
 Power going to wave formation at top speed: 61 %
 Trim (Max stability = 0, Max steadiness = 100): 50
 Bow angle (Positive = bow angles forward): 2.00 degrees
 Stern overhang: 0.00 ft / 0.00 m
 Freeboard (% = measuring location as a percentage of overall length):
    - Stem:  38.00 ft / 11.58 m
    - Forecastle (20 %): 36.00 ft / 10.97 m
    - Mid (39 %):  36.00 ft / 10.97 m (28.00 ft / 8.53 m aft of break)
    - Quarterdeck (15 %): 28.00 ft / 8.53 m
    - Stern:  28.00 ft / 8.53 m
    - Average freeboard: 31.28 ft / 9.53 m

Ship space, strength and comments:
 Space - Hull below water (magazines/engines, low = better): 150.2 %
  - Above water (accommodation/working, high = better): 225.3 %
 Waterplane Area: 46,634 Square feet or 4,332 Square metres
 Displacement factor (Displacement / loading): 101 %
 Structure weight / hull surface area: 176 lbs/sq ft or 860 Kg/sq metre
 Hull strength (Relative):
  - Cross-sectional: 0.92
  - Longitudinal: 2.07
  - Overall: 1.00
 Hull space for machinery, storage, compartmentation is cramped
 Room for accommodation and workspaces is excellent