We had assumed that we would not be able to make our designs work with coal-fired boilers, but the Ger/BB/1907 works great

Back in 1971, my friend Cliff wanted to go ahead and use oil-fired boilers for ships as far back as 1905, because we both assumed that we would not be able to make our designs work with coal. The coal-fired boiler version of the Ger/BB/1907 design disproves that idea. Without using lightweight machinery, the Ger/BB/1907 actually came light, with normal machinery for the date. The planned Standard displacement was 25,847 tons with 8-12in/50 and 12-4in QF guns. The speed was 24 knots with a 13in lower belt. The result seems like a "super ship". This is the Springsharp report:

Ger/BB/1907 Coal-fired boilers, Germany Battleship laid down 1907

Displacement:
 23,526 t light; 24,472 t standard; 28,800 t normal; 32,263 t full load

Dimensions: Length overall / water x beam x draught
 620.00 ft / 620.00 ft x 105.00 ft x 26.00 ft (normal load)
 188.98 m / 188.98 m x 32.00 m  x 7.92 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, 2 raised mounts - superfiring
      12 - 4.00" / 102 mm guns in single mounts, 32.00lbs / 14.51kg shells, 1907 Model
   Quick firing guns in deck mounts with hoists
   on side, all amidships
 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 335.00 ft / 102.11 m 8.00 ft / 2.44 m
 Ends: Unarmoured
 Upper: 8.00" / 203 mm 335.00 ft / 102.11 m 8.00 ft / 2.44 m
   Main Belt covers 83 % of normal length

   - Torpedo Bulkhead:
  3.00" / 76 mm 335.00 ft / 102.11 m 26.00 ft / 7.92 m

   - Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
 Main: 13.0" / 330 mm 8.00" / 203 mm  10.0" / 254 mm
 2nd: 4.00" / 102 mm 4.00" / 102 mm  4.00" / 102 mm

   - Armour deck: 3.00" / 76 mm, Conning tower: 10.00" / 254 mm

Machinery:
 Coal fired boilers, steam turbines, 
 Direct drive, 4 shafts, 57,135 shp / 42,623 Kw = 24.00 kts
 Range 6,500nm at 15.00 kts
 Bunker at max displacement = 7,791 tons (100% coal)

Complement:
 1,105 - 1,437

Cost:
 £2.089 million / $8.358 million

Distribution of weights at normal displacement:
 Armament: 912 tons, 3.2 %
 Armour: 8,558 tons, 29.7 %
    - Belts: 2,604 tons, 9.0 %
    - Torpedo bulkhead: 967 tons, 3.4 %
    - Armament: 2,154 tons, 7.5 %
    - Armour Deck: 2,632 tons, 9.1 %
    - Conning Tower: 202 tons, 0.7 %
 Machinery: 3,571 tons, 12.4 %
 Hull, fittings & equipment: 10,485 tons, 36.4 %
 Fuel, ammunition & stores: 5,274 tons, 18.3 %
 Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
 Survivability (Non-critical penetrating hits needed to sink ship):
   52,787 lbs / 23,944 Kg = 61.1 x 12.0 " / 305 mm shells or 9.4 torpedoes
 Stability (Unstable if below 1.00): 1.25
 Metacentric height 8.1 ft / 2.5 m
 Roll period: 15.5 seconds
 Steadiness - As gun platform (Average = 50 %): 75 %
   - Recoil effect (Restricted arc if above 1.00): 0.34
 Seaboat quality  (Average = 1.00): 1.50

Hull form characteristics:
 Hull has rise forward of midbreak
 Block coefficient: 0.596
 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:  29.00 ft / 8.84 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: 23.60 ft / 7.19 m

Ship space, strength and comments:
 Space - Hull below water (magazines/engines, low = better): 79.8 %
  - Above water (accommodation/working, high = better): 194.4 %
 Waterplane Area: 47,415 Square feet or 4,405 Square metres
 Displacement factor (Displacement / loading): 125 %
 Structure weight / hull surface area: 164 lbs/sq ft or 803 Kg/sq metre
 Hull strength (Relative):
  - Cross-sectional: 0.95
  - Longitudinal: 1.63
  - 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