My latest Springsharp attempt for the GB/CB/Super Fast Original design

I just played around with Springsharp to see what I might be able to achieve for a "super fast battlecruiser" of the "light" type, in that it only has 4 large caliber guns. I was able to have an 8in belt and 37 knots maximum speed. I was happy with that, as the displacement stayed low. The original intent was to have a normal displacement of 32,000 tons. I am embarrassed to say that intended maximum speed was 52 knots. That was based on a misunderstanding, back in 1973, of the effects of friction, in particular. This is the Springsharp report:

GB/CB/Super Fast Original Concept A0, Great Britain Battlecruiser laid down 1921 (Engine 1945)

Displacement:
 30,839 t light; 31,932 t standard; 32,866 t normal; 33,613 t full load

Dimensions: Length overall / water x beam x draught
 800.58 ft / 800.00 ft x 102.00 ft x 38.00 ft (normal load)
 244.02 m / 243.84 m x 31.09 m  x 11.58 m

Armament:
     4 - 17.00" / 432 mm guns (2x2 guns), 2,456.50lbs / 1,114.25kg shells, 1921 Model
   Breech loading guns in turrets (on barbettes)
   on centreline ends, evenly spread, all raised mounts
     16 - 4.00" / 102 mm guns (8x2 guns), 32.00lbs / 14.51kg shells, 1921 Model
   Quick firing guns in deck mounts with hoists
   on side, evenly spread, all raised mounts
 Weight of broadside 10,338 lbs / 4,689 kg
 Shells per gun, main battery: 75

Armour:
  - Belts:  Width (max) Length (avg)  Height (avg)
 Main: 8.00" / 203 mm 520.00 ft / 158.50 m 16.00 ft / 4.88 m
 Ends: Unarmoured
   Main Belt covers 100 % of normal length
   Main belt does not fully cover magazines and engineering spaces

  - Torpedo Bulkhead:
  1.50" / 38 mm 520.00 ft / 158.50 m 28.00 ft / 8.53 m

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

  - Armour deck: 2.50" / 64 mm

Machinery:
 Oil fired boilers, steam turbines,
 Geared drive, 8 shafts, 271,218 shp / 202,329 Kw = 37.00 kts
 Range 5,600nm at 12.00 kts
 Bunker at max displacement = 1,681 tons

Complement:
 1,219 - 1,586

Cost:
 £7.951 million / $31.805 million

Distribution of weights at normal displacement:
 Armament: 1,292 tons, 3.9 %
 Armour: 7,330 tons, 22.3 %
    - Belts: 2,799 tons, 8.5 %
    - Torpedo bulkhead: 808 tons, 2.5 %
    - Armament: 1,428 tons, 4.3 %
    - Armour Deck: 2,295 tons, 7.0 %
    - Conning Tower: 0 tons, 0.0 %
 Machinery: 6,849 tons, 20.8 %
 Hull, fittings & equipment: 15,367 tons, 46.8 %
 Fuel, ammunition & stores: 2,027 tons, 6.2 %
 Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
 Survivability (Non-critical penetrating hits needed to sink ship):
   32,537 lbs / 14,758 Kg = 13.2 x 17.0 " / 432 mm shells or 4.5 torpedoes
 Stability (Unstable if below 1.00): 1.06
 Metacentric height 5.8 ft / 1.8 m
 Roll period: 17.8 seconds
 Steadiness - As gun platform (Average = 50 %): 54 %
   - Recoil effect (Restricted arc if above 1.00): 0.48
 Seaboat quality  (Average = 1.00): 1.01

Hull form characteristics:
 Hull has rise forward of midbreak
 Block coefficient: 0.371
 Length to Beam Ratio: 7.84 : 1
 'Natural speed' for length: 28.28 kts
 Power going to wave formation at top speed: 55 %
 Trim (Max stability = 0, Max steadiness = 100): 53
 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:  33.00 ft / 10.06 m
    - Forecastle (40 %): 30.00 ft / 9.14 m
    - Mid (40 %):  30.00 ft / 9.14 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: 24.48 ft / 7.46 m

Ship space, strength and comments:
 Space - Hull below water (magazines/engines, low = better): 120.4 %
  - Above water (accommodation/working, high = better): 155.0 %
 Waterplane Area: 49,612 Square feet or 4,609 Square metres
 Displacement factor (Displacement / loading): 105 %
 Structure weight / hull surface area: 202 lbs/sq ft or 984 Kg/sq metre
 Hull strength (Relative):
  - Cross-sectional: 0.93
  - Longitudinal: 1.84
  - Overall: 1.00
 Hull space for machinery, storage, compartmentation is cramped
 Room for accommodation and workspaces is excellent