A Ger/BB/1939 16.5in design study

This is from the second series of design studies. As no gun caliber was specified, I thought it might be reasonable for it to have 18in guns, but that did not work well. I scaled back to 9-16.5in, 12-6in, and 12-4in AA guns. It seems to be rather underperforming, but it is the best that I could do. It probably is over-protected for the size. I realized that I still had an 18in armor basis. I scaled that back to 17in and raised the speed to 28 knots. This is the Springsharp report:

Ger/BB/1939 16.5in, Germany Battleship laid down 1939

Displacement:
 57,983 t light; 60,374 t standard; 63,608 t normal; 66,195 t full load

Dimensions: Length overall / water x beam x draught
 919.17 ft / 915.00 ft x 130.00 ft x 34.00 ft (normal load)
 280.16 m / 278.89 m x 39.62 m  x 10.36 m

Armament:
      9 - 16.50" / 419 mm guns (3x3 guns), 2,246.06lbs / 1,018.80kg shells, 1939 Model
   Breech loading guns in turrets (on barbettes)
   on centreline ends, majority forward, 1 raised mount - superfiring
      12 - 6.00" / 152 mm guns (6x2 guns), 108.00lbs / 48.99kg shells, 1939 Model
   Quick firing guns in turrets (on barbettes)
   on side, all amidships
      12 - 4.00" / 102 mm guns (6x2 guns), 32.00lbs / 14.51kg shells, 1939 Model
   Anti-aircraft guns in turrets (on barbettes)
   on side, evenly spread, all raised mounts
      56 - 1.46" / 37.0 mm guns (28x2 guns), 1.55lbs / 0.70kg shells, 1939 Model
   Anti-aircraft guns in deck mounts 
   on side, evenly spread, 18 raised mounts
      42 - 0.79" / 20.0 mm guns (21x2 guns), 0.24lbs / 0.11kg shells, 1939 Model
   Breech loading guns in deck mounts 
   on side, evenly spread, 14 raised mounts
 Weight of broadside 21,991 lbs / 9,975 kg
 Shells per gun, main battery: 90

Armour:
   - Belts:  Width (max) Length (avg)  Height (avg)
 Main: 17.0" / 432 mm 600.00 ft / 182.88 m 17.00 ft / 5.18 m
 Ends: Unarmoured
   Main Belt covers 101 % of normal length

   - Torpedo Bulkhead:
  3.00" / 76 mm 600.00 ft / 182.88 m 33.00 ft / 10.06 m

   - Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
 Main: 17.0" / 432 mm 10.0" / 254 mm  17.0" / 432 mm
 2nd: 6.00" / 152 mm 6.00" / 152 mm  6.00" / 152 mm
 3rd: 1.00" / 25 mm 1.00" / 25 mm  1.00" / 25 mm
 4th: 1.00" / 25 mm       -         -
 5th: 1.00" / 25 mm       -         -

   - Armour deck: 8.00" / 203 mm, Conning tower: 18.00" / 457 mm

Machinery:
 Oil fired boilers, steam turbines, 
 Geared drive, 4 shafts, 143,577 shp / 107,108 Kw = 28.00 kts
 Range 8,500nm at 15.00 kts
 Bunker at max displacement = 5,821 tons

Complement:
 2,002 - 2,603

Cost:
 £28.406 million / $113.626 million

Distribution of weights at normal displacement:
 Armament: 2,749 tons, 4.3 %
 Armour: 27,227 tons, 42.8 %
    - Belts: 7,471 tons, 11.7 %
    - Torpedo bulkhead: 2,198 tons, 3.5 %
    - Armament: 4,648 tons, 7.3 %
    - Armour Deck: 12,292 tons, 19.3 %
    - Conning Tower: 618 tons, 1.0 %
 Machinery: 3,885 tons, 6.1 %
 Hull, fittings & equipment: 24,123 tons, 37.9 %
 Fuel, ammunition & stores: 5,625 tons, 8.8 %
 Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
 Survivability (Non-critical penetrating hits needed to sink ship):
   116,520 lbs / 52,853 Kg = 51.9 x 16.5 " / 419 mm shells or 25.0 torpedoes
 Stability (Unstable if below 1.00): 1.23
 Metacentric height 10.9 ft / 3.3 m
 Roll period: 16.6 seconds
 Steadiness - As gun platform (Average = 50 %): 60 %
   - Recoil effect (Restricted arc if above 1.00): 0.30
 Seaboat quality  (Average = 1.00): 1.20

Hull form characteristics:
 Hull has a flush deck
 Block coefficient: 0.550
 Length to Beam Ratio: 7.04 : 1
 'Natural speed' for length: 30.25 kts
 Power going to wave formation at top speed: 44 %
 Trim (Max stability = 0, Max steadiness = 100): 50
 Bow angle (Positive = bow angles forward): 4.00 degrees
 Stern overhang: 2.00 ft / 0.61 m
 Freeboard (% = measuring location as a percentage of overall length):
    - Stem:  31.00 ft / 9.45 m
    - Forecastle (20 %): 20.00 ft / 6.10 m
    - Mid (50 %):  20.00 ft / 6.10 m
    - Quarterdeck (15 %): 20.00 ft / 6.10 m
    - Stern:  20.00 ft / 6.10 m
    - Average freeboard: 20.88 ft / 6.36 m
 Ship tends to be wet forward

Ship space, strength and comments:
 Space - Hull below water (magazines/engines, low = better): 62.5 %
  - Above water (accommodation/working, high = better): 158.0 %
 Waterplane Area: 83,051 Square feet or 7,716 Square metres
 Displacement factor (Displacement / loading): 112 %
 Structure weight / hull surface area: 225 lbs/sq ft or 1,101 Kg/sq metre
 Hull strength (Relative):
  - Cross-sectional: 1.03
  - Longitudinal: 0.99
  - Overall: 1.00
 Hull space for machinery, storage, compartmentation is excellent
 Room for accommodation and workspaces is excellent