I had greatly overestimated speed for power: Ger/CBL/1915 Mod.A

the "Mod.A" version of the Ger/CBL/1915 design attempted to reach very high speeds. The reality was that while the design was workable, the extreme speeds over 40 knots were beyond reach. The design specified a 20,000 ton ship with one twin 12in gun turret forward. There were also 12-6in QF guns grouped in the center. There was a lower quarterdeck for about 33% of the length. I have a photo of the ship:

This is what I have called a "cruiser killer" (Frank Fox's term). I have a Cafe Press product line with this image on it:

For the Springsharp design, I closely followed the original weights and power for the Mod.A version:

Ger/CBL/1915 Mod.A, Enter country Enter ship type laid down 1915 (Engine 1937)

Displacement:
18,062 t light; 18,624 t standard; 20,000 t normal; 21,101 t full load

Dimensions: Length overall / water x beam x draught
804.17 ft / 800.00 ft x 80.00 ft x 23.00 ft (normal load)
245.11 m / 243.84 m x 24.38 m  x 7.01 m

Armament:
     2 - 12.00" / 305 mm guns (1x2 guns), 864.00lbs / 391.90kg shells, 1915 Model
  Breech loading guns in a turret (on a barbette)
  on centreline forward
     12 - 6.00" / 152 mm guns in single mounts, 108.00lbs / 48.99kg shells, 1915 Model
  Quick firing guns in deck mounts with hoists
  on side, all amidships
Weight of broadside 3,024 lbs / 1,372 kg
Shells per gun, main battery: 90

Armour:
  - Belts:  Width (max) Length (avg)  Height (avg)
Main: 4.00" / 102 mm 540.00 ft / 164.59 m 17.00 ft / 5.18 m
Ends: Unarmoured
  Main Belt covers 104 % of normal length
  Main belt does not fully cover magazines and engineering spaces

  - Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 6.00" / 152 mm 4.00" / 102 mm  6.00" / 152 mm
2nd: 3.00" / 76 mm 3.00" / 76 mm  3.00" / 76 mm

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

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 4 shafts, 203,756 shp / 152,002 Kw = 37.00 kts
Range 7,200nm at 15.00 kts
Bunker at max displacement = 2,477 tons

Complement:
840 - 1,093

Cost:
£2.531 million / $10.126 million

Distribution of weights at normal displacement:
Armament: 378 tons, 1.9 %
Armour: 3,630 tons, 18.2 %
   - Belts: 1,518 tons, 7.6 %
   - Torpedo bulkhead: 0 tons, 0.0 %
   - Armament: 474 tons, 2.4 %
   - Armour Deck: 1,544 tons, 7.7 %
   - Conning Tower: 95 tons, 0.5 %
Machinery: 5,647 tons, 28.2 %
Hull, fittings & equipment: 8,406 tons, 42.0 %
Fuel, ammunition & stores: 1,938 tons, 9.7 %
Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
  24,688 lbs / 11,198 Kg = 28.6 x 12.0 " / 305 mm shells or 2.1 torpedoes
Stability (Unstable if below 1.00): 1.32
Metacentric height 5.9 ft / 1.8 m
Roll period: 13.9 seconds
Steadiness - As gun platform (Average = 50 %): 56 %
  - Recoil effect (Restricted arc if above 1.00): 0.26
Seaboat quality  (Average = 1.00): 1.12

Hull form characteristics:
Hull has rise forward of midbreak
Block coefficient: 0.476
Length to Beam Ratio: 10.00 : 1
'Natural speed' for length: 28.28 kts
Power going to wave formation at top speed: 55 %
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 %): 26.00 ft / 7.92 m
   - Mid (67 %):  26.00 ft / 7.92 m (18.00 ft / 5.49 m aft of break)
   - Quarterdeck (15 %): 18.00 ft / 5.49 m
   - Stern:  18.00 ft / 5.49 m
   - Average freeboard: 23.76 ft / 7.24 m
Ship tends to be wet forward

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 106.0 %
 - Above water (accommodation/working, high = better): 225.0 %
Waterplane Area: 41,719 Square feet or 3,876 Square metres
Displacement factor (Displacement / loading): 111 %
Structure weight / hull surface area: 133 lbs/sq ft or 650 Kg/sq metre
Hull strength (Relative):
 - Cross-sectional: 0.98
 - Longitudinal: 1.14
 - Overall: 1.00
Hull space for machinery, storage, compartmentation is adequate
Room for accommodation and workspaces is excellent