My original concept for the Ger/BB/1907 design

I just tried my original concept for the Ger/BB/1907 design where the speed was just 24 knots. I had estimated in 1971 that 54,000 SHP was be sufficient. The Springsharp calculation is 56,740 SHP, which is pretty close, considering the methods I was using for estimation in 1971. I had to increase the draft to get sufficient hull strength, but otherwise, I was able to get a good result with Springsharp without much effort. The machinery basis was 25 SHP/ton:

Ger/BB/1907, Germany Battleship laid down 1907 (Engine 1912)

Displacement:
 25,231 t light; 26,180 t standard; 28,977 t normal; 31,215 t full load

Dimensions: Length overall / water x beam x draught
 620.00 ft / 620.00 ft x 105.00 ft x 27.00 ft (normal load)
 188.98 m / 188.98 m x 32.00 m  x 8.23 m

Armament:
      8 - 12.00" / 305 mm guns (4x2 guns), 864.00lbs / 391.90kg shells, 1907 Model
   Breech loading guns in turrets (on barbettes)
   on centreline ends, evenly spread, all raised mounts - superfiring
      12 - 4.00" / 102 mm guns in single mounts, 32.00lbs / 14.51kg shells, 1907 Model
   Quick firing guns in casemate mounts 
   on side, evenly spread, all raised mounts
 Weight of broadside 7,296 lbs / 3,309 kg
 Shells per gun, main battery: 90

Armour:
   - Belts:  Width (max) Length (avg)  Height (avg)
 Main: 13.0" / 330 mm 380.00 ft / 115.82 m 17.00 ft / 5.18 m
 Ends: Unarmoured
 Upper: 8.00" / 203 mm 380.00 ft / 115.82 m 8.00 ft / 2.44 m
   Main Belt covers 94 % of normal length

   - Torpedo Bulkhead:
  2.00" / 51 mm 380.00 ft / 115.82 m 24.00 ft / 7.32 m

   - Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
 Main: 13.0" / 330 mm 8.00" / 203 mm  13.0" / 330 mm
 2nd: 4.00" / 102 mm 2.00" / 51 mm  2.00" / 51 mm

   - Armour deck: 3.00" / 76 mm, Conning tower: 8.00" / 203 mm

Machinery:
 Oil fired boilers, steam turbines, 
 Direct drive, 4 shafts, 56,740 shp / 42,328 Kw = 24.00 kts
 Range 7,500nm at 15.00 kts
 Bunker at max displacement = 5,035 tons

Complement:
 1,109 - 1,443

Cost:
 £1.966 million / $7.864 million

Distribution of weights at normal displacement:
 Armament: 912 tons, 3.1 %
 Armour: 11,208 tons, 38.7 %
    - Belts: 4,843 tons, 16.7 %
    - Torpedo bulkhead: 675 tons, 2.3 %
    - Armament: 2,941 tons, 10.2 %
    - Armour Deck: 2,586 tons, 8.9 %
    - Conning Tower: 163 tons, 0.6 %
 Machinery: 2,262 tons, 7.8 %
 Hull, fittings & equipment: 10,849 tons, 37.4 %
 Fuel, ammunition & stores: 3,746 tons, 12.9 %
 Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
 Survivability (Non-critical penetrating hits needed to sink ship):
   58,810 lbs / 26,676 Kg = 68.1 x 12.0 " / 305 mm shells or 12.2 torpedoes
 Stability (Unstable if below 1.00): 1.07
 Metacentric height 6.1 ft / 1.9 m
 Roll period: 17.9 seconds
 Steadiness - As gun platform (Average = 50 %): 85 %
   - Recoil effect (Restricted arc if above 1.00): 0.42
 Seaboat quality  (Average = 1.00): 1.70

Hull form characteristics:
 Hull has rise forward of midbreak
 Block coefficient: 0.577
 Length to Beam Ratio: 5.90 : 1
 'Natural speed' for length: 24.90 kts
 Power going to wave formation at top speed: 49 %
 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:  31.00 ft / 9.45 m
    - Forecastle (72 %): 29.00 ft / 8.84 m
    - Mid (72 %):  29.00 ft / 8.84 m (21.00 ft / 6.40 m aft of break)
    - Quarterdeck (15 %): 21.00 ft / 6.40 m
    - Stern:  21.00 ft / 6.40 m
    - Average freeboard: 27.34 ft / 8.33 m

Ship space, strength and comments:
 Space - Hull below water (magazines/engines, low = better): 61.6 %
  - Above water (accommodation/working, high = better): 168.1 %
 Waterplane Area: 46,598 Square feet or 4,329 Square metres
 Displacement factor (Displacement / loading): 126 %
 Structure weight / hull surface area: 166 lbs/sq ft or 810 Kg/sq metre
 Hull strength (Relative):
  - Cross-sectional: 0.93
  - Longitudinal: 1.95
  - Overall: 1.00
 Hull space for machinery, storage, compartmentation is excellent
 Room for accommodation and workspaces is excellent
 Ship has slow, easy roll, a good, steady gun platform
 Excellent seaboat, comfortable, can fire her guns in the heaviest weather