This is the "D K Brown" version of the GB/CB/1905 battlecruiser (Updated)

When I exchanged communications with D. K. Brown in 2001, he suggested that the GB/CB/1905 should have 8-12in guns and 6in side armour. He advocated the 8-12in guns so that the ship could fire alternating four gun salvos. That was the gold standard for director controlled, long-range gunfire. He said that you needed 6in side armour to keep out lighter shells and splinters. That would provide an adequate waterline protection. That would make the ship very viable. In any case, he said that Philip Watts would have approved, as he liked fast ships with big guns. This is my attempt at such a ship with coal-fired boilers. It does rely upon very lightweight machinery to work: 26.4 SHP/ton machinery weight. This is my photo of this version:

This is the Springsharp report:

GB/CB/1905 Alt version-coal fired boilers, Great Britain Battlecruiser laid down 1905 (Engine 1921)

Displacement:
 25,141 t light; 26,134 t standard; 28,600 t normal; 30,573 t full load

Dimensions: Length overall / water x beam x draught
 770.00 ft / 770.00 ft x 85.00 ft x 26.00 ft (normal load)
 234.70 m / 234.70 m x 25.91 m  x 7.92 m

Armament:
      8 - 12.00" / 305 mm guns (4x2 guns), 864.00lbs / 391.90kg shells, 1905 Model
   Breech loading guns in turrets (on barbettes)
   on centreline ends, evenly spread, 2 raised mounts - superfiring
      12 - 6.00" / 152 mm guns in single mounts, 108.00lbs / 48.99kg shells, 1905 Model
   Quick firing guns in deck mounts with hoists
   on side, all amidships
 Weight of broadside 8,208 lbs / 3,723 kg
 Shells per gun, main battery: 90

Armour:
   - Belts:  Width (max) Length (avg)  Height (avg)
 Main: 6.00" / 152 mm 490.00 ft / 149.35 m 8.00 ft / 2.44 m
 Ends: Unarmoured
 Upper: 4.00" / 102 mm 490.00 ft / 149.35 m 8.00 ft / 2.44 m
   Main Belt covers 98 % of normal length
   Main belt does not fully cover magazines and engineering spaces

   - Torpedo Bulkhead:
  2.00" / 51 mm 490.00 ft / 149.35 m 26.00 ft / 7.92 m

   - Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
 Main: 7.00" / 178 mm 5.00" / 127 mm  7.00" / 178 mm
 2nd: 4.00" / 102 mm 3.00" / 76 mm  4.00" / 102 mm

   - Armour deck: 2.00" / 51 mm, Conning tower: 7.00" / 178 mm

Machinery:
 Coal fired boilers, steam turbines, 
 Direct drive, 4 shafts, 173,827 shp / 129,675 Kw = 33.00 kts
 Range 6,500nm at 15.00 kts
 Bunker at max displacement = 4,439 tons (100% coal)

Complement:
 1,099 - 1,429

Cost:
 £2.664 million / $10.654 million

Distribution of weights at normal displacement:
 Armament: 1,026 tons, 3.6 %
 Armour: 6,102 tons, 21.3 %
    - Belts: 1,658 tons, 5.8 %
    - Torpedo bulkhead: 943 tons, 3.3 %
    - Armament: 1,608 tons, 5.6 %
    - Armour Deck: 1,752 tons, 6.1 %
    - Conning Tower: 141 tons, 0.5 %
 Machinery: 6,584 tons, 23.0 %
 Hull, fittings & equipment: 11,428 tons, 40.0 %
 Fuel, ammunition & stores: 3,459 tons, 12.1 %
 Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
 Survivability (Non-critical penetrating hits needed to sink ship):
   33,068 lbs / 14,999 Kg = 38.3 x 12.0 " / 305 mm shells or 3.9 torpedoes
 Stability (Unstable if below 1.00): 1.16
 Metacentric height 5.1 ft / 1.6 m
 Roll period: 15.7 seconds
 Steadiness - As gun platform (Average = 50 %): 55 %
   - Recoil effect (Restricted arc if above 1.00): 0.72
 Seaboat quality  (Average = 1.00): 1.10

Hull form characteristics:
 Hull has rise forward of midbreak
 Block coefficient: 0.588
 Length to Beam Ratio: 9.06 : 1
 'Natural speed' for length: 27.75 kts
 Power going to wave formation at top speed: 55 %
 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:  32.00 ft / 9.75 m
    - Forecastle (20 %): 28.00 ft / 8.53 m
    - Mid (67 %):  28.00 ft / 8.53 m (20.00 ft / 6.10 m aft of break)
    - Quarterdeck (15 %): 20.00 ft / 6.10 m
    - Stern:  20.00 ft / 6.10 m
    - Average freeboard: 25.68 ft / 7.83 m

Ship space, strength and comments:
 Space - Hull below water (magazines/engines, low = better): 132.9 %
  - Above water (accommodation/working, high = better): 211.6 %
 Waterplane Area: 47,345 Square feet or 4,398 Square metres
 Displacement factor (Displacement / loading): 104 %
 Structure weight / hull surface area: 161 lbs/sq ft or 784 Kg/sq metre
 Hull strength (Relative):
  - Cross-sectional: 0.98
  - Longitudinal: 1.17
  - Overall: 1.00
 Hull space for machinery, storage, compartmentation is cramped
 Room for accommodation and workspaces is excellent