An anchronistic Southampton light cruiser

In 1999, I drew a "not to scale", freehand anachronistic version of the British light cruiser Southampton. This was the original drawing:

I thought that would make a good candidate for a Springsharp 3.0b1 Beta design. This is the Springsharp report:

Southampton, anachronistic, Great Britain Light Cruiser laid down 1914 (Engine 1918)

Displacement:
 5,028 t light; 5,231 t standard; 5,733 t normal; 6,135 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
 (458.84 ft / 454.00 ft) x 50.00 ft x (17.00 / 17.88 ft)
 (139.85 m / 138.38 m) x 15.24 m  x (5.18 / 5.45 m)

Armament:
      9 - 6.00" / 152 mm 45.0 cal guns - 100.00lbs / 45.36kg shells, 150 per gun
   Quick firing guns in turret on barbette mounts , 1914 Model
   3 x Triple mounts on centreline ends, majority forward
  2 raised mounts - superfiring
      4 - 4.00" / 102 mm 45.0 cal guns - 32.00lbs / 14.51kg shells, 150 per gun
   Anti-air guns in deck mounts , 1914 Model
   2 x Twin mounts on sides, forward deck aft
      20 - 1.57" / 40.0 mm 45.0 cal guns - 2.00lbs / 0.91kg shells, 150 per gun
   Anti-air guns in deck mounts , 1914 Model
   4 x 2 row quad mounts on sides, evenly spread
  4 raised mounts
   1 x 2 row quad mount on centreline, aft deck aft
 Weight of broadside 1,068 lbs / 1,068 kg
 4 - 21.0" / 533 mm above water torpedoes

Armour:
   - Belts:  Width (max) Length (avg)  Height (avg)
 Main: 4.00" / 102 mm 300.00 ft / 91.44 m 16.00 ft / 4.88 m
 Ends: Unarmoured
   Main Belt covers 102 % of normal length

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

   - Armour deck: 2.00" / 51 mm, Conning tower: 4.00" / 102 mm

Machinery:
 Oil fired boilers, steam turbines, 
 Geared drive, 2 shafts, 22,139 shp / 16,516 Kw = 25.00 kts
 Range 4,800nm at 15.00 kts
 Bunker at max displacement = 904 tons

Complement:
 329 - 428

Cost:
 £0.495 million / $1.981 million

Distribution of weights at normal displacement:
 Armament: 253 tons, 4.4 %
 Armour: 1,720 tons, 30.0 %
    - Belts: 805 tons, 14.0 %
    - Torpedo bulkhead: 0 tons, 0.0 %
    - Armament: 295 tons, 5.1 %
    - Armour Deck: 593 tons, 10.3 %
    - Conning Tower: 28 tons, 0.5 %
 Machinery: 799 tons, 13.9 %
 Hull, fittings & equipment: 2,389 tons, 41.7 %
 Fuel, ammunition & stores: 706 tons, 12.3 %
 Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
 Survivability (Non-critical penetrating hits needed to sink ship):
   11,307 lbs / 5,129 Kg = 104.7 x 6.0 " / 152 mm shells or 2.1 torpedoes
 Stability (Unstable if below 1.00): 1.01
 Metacentric height 1.8 ft / 0.5 m
 Roll period: 15.7 seconds
 Steadiness - As gun platform (Average = 50 %): 85 %
   - Recoil effect (Restricted arc if above 1.00): 0.87
 Seaboat quality  (Average = 1.00): 1.70

Hull form characteristics:
 Hull has a flush deck,
   a normal bow and small transom stern
 Block coefficient (normal/deep): 0.520 / 0.529
 Length to Beam Ratio: 9.08 : 1
 'Natural speed' for length: 24.44 kts
 Power going to wave formation at top speed: 52 %
 Trim (Max stability = 0, Max steadiness = 100): 50
 Bow angle (Positive = bow angles forward): 6.00 degrees
 Stern overhang: 2.00 ft / 0.61 m
 Freeboard (% = length of deck as a percentage of waterline length):
    Fore end,  Aft end
    - Forecastle: 20.00 %,  27.00 ft / 8.23 m,  21.00 ft / 6.40 m
    - Forward deck: 30.00 %,  21.00 ft / 6.40 m,  18.00 ft / 5.49 m
    - Aft deck: 30.00 %,  18.00 ft / 5.49 m,  16.00 ft / 4.88 m
    - Quarter deck: 20.00 %,  16.00 ft / 4.88 m,  17.00 ft / 5.18 m
    - Average freeboard:  18.93 ft / 5.77 m

Ship space, strength and comments:
 Space - Hull below water (magazines/engines, low = better): 62.6 %
  - Above water (accommodation/working, high = better): 148.8 %
 Waterplane Area: 16,027 Square feet or 1,489 Square metres
 Displacement factor (Displacement / loading): 134 %
 Structure weight / hull surface area: 88 lbs/sq ft or 432 Kg/sq metre
 Hull strength (Relative):
  - Cross-sectional: 0.92
  - Longitudinal: 2.25
  - 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

A Springsharp 3.0b1 Beta version of the Ger/CBL/1915 Mod.A design

The Ger/CBL/1915 Mod.A design is a "Cruiser Killer". I had designed the ship in the early 1970's to see what might be done for extreme speed. The armament is rather like an 1890's fast Elswick cruiser, except that the main armament is in a turret, rather than some other mount. The ship is designed to run up on lesser ships, hammer them with a quick, close range shot or two from the 12in guns and sink or disable them. This is a photo of one of the ships:

I was able to get an acceptable design with very lightweight machinery and an increased draft. I really like the facility in Springsharp 3.0b1 to be able to see the hull profile after you specifiy the freeboard, in detail. This is the Springsharp report:

Ger/CBL/1915 Mod.A, Germany Light Battlecruiser laid down 1915 (Engine 1945)

Displacement:
 21,642 t light; 22,306 t standard; 23,654 t normal; 24,733 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
 (804.30 ft / 800.00 ft) x 80.00 ft x (24.00 / 24.85 ft)
 (245.15 m / 243.84 m) x 24.38 m  x (7.32 / 7.58 m)

Armament:
      2 - 12.00" / 305 mm 50.0 cal guns - 910.00lbs / 412.77kg shells, 90 per gun
   Breech loading guns in turret on barbette mount , 1915 Model
   1 x Twin mount on centreline, forward deck centre
      12 - 6.00" / 152 mm 50.0 cal guns - 100.00lbs / 45.36kg shells, 150 per gun
   Quick firing guns in deck and hoist mounts , 1915 Model
   12 x Single mounts on sides, evenly spread
 Weight of broadside 3,020 lbs / 3,020 kg

Armour:
   - Belts:  Width (max) Length (avg)  Height (avg)
 Main: 4.00" / 102 mm 620.00 ft / 188.98 m 12.00 ft / 3.66 m
 Ends: Unarmoured
   Main Belt covers 119 % 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  4.00" / 102 mm
 2nd: 4.00" / 102 mm 1.00" / 25 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, 6 shafts, 321,334 shp / 239,715 Kw = 40.00 kts
 Range 4,500nm at 18.00 kts
 Bunker at max displacement = 2,427 tons

Complement:
 953 - 1,239

Cost:
 £3.240 million / $12.959 million

Distribution of weights at normal displacement:
 Armament: 766 tons, 3.2 %
 Armour: 3,302 tons, 14.0 %
    - Belts: 1,209 tons, 5.1 %
    - Torpedo bulkhead: 0 tons, 0.0 %
    - Armament: 351 tons, 1.5 %
    - Armour Deck: 1,636 tons, 6.9 %
    - Conning Tower: 107 tons, 0.5 %
 Machinery: 8,114 tons, 34.3 %
 Hull, fittings & equipment: 9,828 tons, 41.5 %
 Fuel, ammunition & stores: 2,013 tons, 8.5 %
 Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
 Survivability (Non-critical penetrating hits needed to sink ship):
   22,280 lbs / 10,106 Kg = 25.8 x 12.0 " / 305 mm shells or 1.8 torpedoes
 Stability (Unstable if below 1.00): 1.24
 Metacentric height 5.3 ft / 1.6 m
 Roll period: 14.6 seconds
 Steadiness - As gun platform (Average = 50 %): 51 %
   - Recoil effect (Restricted arc if above 1.00): 0.31
 Seaboat quality  (Average = 1.00): 1.01

Hull form characteristics:
 Hull has low quarterdeck ,
   a normal bow and a cruiser stern
 Block coefficient (normal/deep): 0.539 / 0.544
 Length to Beam Ratio: 10.00 : 1
 'Natural speed' for length: 28.28 kts
 Power going to wave formation at top speed: 61 %
 Trim (Max stability = 0, Max steadiness = 100): 50
 Bow angle (Positive = bow angles forward): 7.00 degrees
 Stern overhang: -3.00 ft / -0.91 m
 Freeboard (% = length of deck as a percentage of waterline length):
    Fore end,  Aft end
    - Forecastle: 20.00 %,  35.00 ft / 10.67 m,  32.00 ft / 9.75 m
    - Forward deck: 30.00 %,  32.00 ft / 9.75 m,  29.00 ft / 8.84 m
    - Aft deck: 17.00 %,  29.00 ft / 8.84 m,  29.00 ft / 8.84 m
    - Quarter deck: 33.00 %,  21.00 ft / 6.40 m,  22.00 ft / 6.71 m
    - Average freeboard:  27.82 ft / 8.48 m

Ship space, strength and comments:
 Space - Hull below water (magazines/engines, low = better): 123.9 %
  - Above water (accommodation/working, high = better): 264.7 %
 Waterplane Area: 44,207 Square feet or 4,107 Square metres
 Displacement factor (Displacement / loading): 104 %
 Structure weight / hull surface area: 140 lbs/sq ft or 681 Kg/sq metre
 Hull strength (Relative):
  - Cross-sectional: 0.96
  - Longitudinal: 1.46
  - Overall: 1.00
 Hull space for machinery, storage, compartmentation is cramped
 Room for accommodation and workspaces is excellent

A very fast Ger/CB/1911 design

From the beginning, the Ger/CB/1911 design was intended to have very lightweight machinery (the beginning being 1971). This was designed to sacrifice armament and protection for speed. Springsharp 3.0b1 forced me to use geared turbines to get rid of an error message, probably due to the date of the machinery. The date was set late so that the machinery would be lightweight. This was my last attempt at a photograph of a Ger/CB/1911 ship:

This is the Springsharp report:

Ger/CB/1911, Germany Battlecruiser laid down 1911 (Engine 1937)

Displacement:
 30,510 t light; 31,548 t standard; 34,457 t normal; 36,784 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
 (753.00 ft / 750.00 ft) x 100.00 ft x (30.00 / 31.58 ft)
 (229.51 m / 228.60 m) x 30.48 m  x (9.14 / 9.62 m)

Armament:
      6 - 12.00" / 305 mm 50.0 cal guns - 910.00lbs / 412.77kg shells, 90 per gun
   Breech loading guns in turret on barbette mounts , 1911 Model
   2 x Triple mounts on centreline, forward deck forward
  1 raised mount - superfiring
      8 - 6.00" / 152 mm 50.0 cal guns - 114.33lbs / 51.86kg shells, 150 per gun
   Quick firing guns in deck and hoist mounts , 1911 Model
   8 x Single mounts on sides, forward deck aft
  2 raised mounts - superfiring
 Weight of broadside 6,375 lbs / 6,375 kg

Armour:
   - Belts:  Width (max) Length (avg)  Height (avg)
 Main: 6.00" / 152 mm 400.00 ft / 121.92 m 17.00 ft / 5.18 m
 Ends: Unarmoured
   Main Belt covers 82 % of normal length
   Main belt does not fully cover magazines and engineering spaces

   - Torpedo Bulkhead:
  2.00" / 51 mm 400.00 ft / 121.92 m 30.00 ft / 9.14 m

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

   - Armour deck: 5.00" / 127 mm, Conning tower: 8.00" / 203 mm

Machinery:
 Oil fired boilers, steam turbines, 
 Geared drive, 4 shafts, 282,829 shp / 210,990 Kw = 36.00 kts
 Range 7,500nm at 18.00 kts
 Bunker at max displacement = 5,236 tons

Complement:
 1,263 - 1,643

Cost:
 £2.831 million / $11.322 million

Distribution of weights at normal displacement:
 Armament: 1,354 tons, 3.9 %
 Armour: 8,751 tons, 25.4 %
    - Belts: 1,822 tons, 5.3 %
    - Torpedo bulkhead: 888 tons, 2.6 %
    - Armament: 1,080 tons, 3.1 %
    - Armour Deck: 4,779 tons, 13.9 %
    - Conning Tower: 183 tons, 0.5 %
 Machinery: 7,839 tons, 22.7 %
 Hull, fittings & equipment: 13,128 tons, 38.1 %
 Fuel, ammunition & stores: 3,947 tons, 11.5 %
 Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
 Survivability (Non-critical penetrating hits needed to sink ship):
   48,548 lbs / 22,021 Kg = 56.2 x 12.0 " / 305 mm shells or 5.9 torpedoes
 Stability (Unstable if below 1.00): 1.28
 Metacentric height 7.8 ft / 2.4 m
 Roll period: 15.0 seconds
 Steadiness - As gun platform (Average = 50 %): 54 %
   - Recoil effect (Restricted arc if above 1.00): 0.33
 Seaboat quality  (Average = 1.00): 1.09

Hull form characteristics:
 Hull has a flush deck,
   a normal bow and a cruiser stern
 Block coefficient (normal/deep): 0.536 / 0.544
 Length to Beam Ratio: 7.50 : 1
 'Natural speed' for length: 27.39 kts
 Power going to wave formation at top speed: 62 %
 Trim (Max stability = 0, Max steadiness = 100): 50
 Bow angle (Positive = bow angles forward): 0.00 degrees
 Stern overhang: 3.00 ft / 0.91 m
 Freeboard (% = length of deck as a percentage of waterline length):
    Fore end,  Aft end
    - Forecastle: 25.00 %,  35.00 ft / 10.67 m,  31.00 ft / 9.45 m
    - Forward deck: 30.00 %,  31.00 ft / 9.45 m,  29.00 ft / 8.84 m
    - Aft deck: 30.00 %,  29.00 ft / 8.84 m,  30.00 ft / 9.14 m
    - Quarter deck: 15.00 %,  30.00 ft / 9.14 m,  31.00 ft / 9.45 m
    - Average freeboard:  30.58 ft / 9.32 m

Ship space, strength and comments:
 Space - Hull below water (magazines/engines, low = better): 114.3 %
  - Above water (accommodation/working, high = better): 231.8 %
 Waterplane Area: 51,661 Square feet or 4,799 Square metres
 Displacement factor (Displacement / loading): 112 %
 Structure weight / hull surface area: 167 lbs/sq ft or 816 Kg/sq metre
 Hull strength (Relative):
  - Cross-sectional: 0.93
  - Longitudinal: 1.90
  - Overall: 1.00
 Hull space for machinery, storage, compartmentation is cramped
 Room for accommodation and workspaces is excellent

By lightening the Repulse, it could reach 34 knots

I did the experiment that I proposed and lightened the Repulse, along with reducing fuel and ammunition. The ship, in Springsharp 3.0b1 Beta, could make 34 knots:

Repulse, lightened, Great Britain Battlecruiser laid down 1915 (Engine 1919)

Displacement:
 29,493 t light; 30,397 t standard; 31,450 t normal; 32,293 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
 (800.00 ft / 794.00 ft) x 89.00 ft x (29.67 / 30.28 ft)
 (243.84 m / 242.01 m) x 27.13 m  x (9.04 / 9.23 m)

Armament:
      6 - 15.00" / 381 mm 42.0 cal guns - 1,920.00lbs / 870.90kg shells, 40 per gun
   Breech loading guns in turret on barbette mounts , 1915 Model
   3 x Twin mounts on centreline ends, majority forward
  1 raised mount - superfiring
      17 - 4.00" / 102 mm 45.0 cal guns - 32.27lbs / 14.64kg shells, 60 per gun
   Quick firing guns in deck and hoist mounts , 1915 Model
   4 x Twin mounts on sides, evenly spread
   3 x Triple mounts on centreline, aft deck forward
  2 raised mounts - superfiring
 Weight of broadside 12,069 lbs / 12,069 kg

Armour:
   - Belts:  Width (max) Length (avg)  Height (avg)
 Main: 6.00" / 152 mm 490.00 ft / 149.35 m 16.00 ft / 4.88 m
 Ends: 4.00" / 102 mm 300.00 ft / 91.44 m 12.00 ft / 3.66 m
   4.00 ft / 1.22 m Unarmoured ends
   Main Belt covers 95 % of normal length
   Main belt does not fully cover magazines and engineering spaces

   - Torpedo Bulkhead:
  1.50" / 38 mm 490.00 ft / 149.35 m 29.00 ft / 8.84 m

   - Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
 Main: 9.00" / 229 mm 5.00" / 127 mm  7.00" / 178 mm
 2nd: 3.00" / 76 mm       -   2.00" / 51 mm

   - Armour deck: 3.00" / 76 mm, Conning tower: 9.00" / 229 mm

Machinery:
 Oil fired boilers, steam turbines, 
 Geared drive, 4 shafts, 199,422 shp / 148,769 Kw = 34.00 kts
 Range 3,200nm at 15.00 kts
 Bunker at max displacement = 1,896 tons

Complement:
 1,180 - 1,535

Cost:
 £4.263 million / $17.054 million

Distribution of weights at normal displacement:
 Armament: 1,642 tons, 5.2 %
 Armour: 7,645 tons, 24.3 %
    - Belts: 2,531 tons, 8.0 %
    - Torpedo bulkhead: 789 tons, 2.5 %
    - Armament: 1,458 tons, 4.6 %
    - Armour Deck: 2,674 tons, 8.5 %
    - Conning Tower: 193 tons, 0.6 %
 Machinery: 7,082 tons, 22.5 %
 Hull, fittings & equipment: 13,687 tons, 43.5 %
 Fuel, ammunition & stores: 1,957 tons, 6.2 %
 Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
 Survivability (Non-critical penetrating hits needed to sink ship):
   37,330 lbs / 16,933 Kg = 22.1 x 15.0 " / 381 mm shells or 4.2 torpedoes
 Stability (Unstable if below 1.00): 1.13
 Metacentric height 5.3 ft / 1.6 m
 Roll period: 16.2 seconds
 Steadiness - As gun platform (Average = 50 %): 52 %
   - Recoil effect (Restricted arc if above 1.00): 0.92
 Seaboat quality  (Average = 1.00): 1.03

Hull form characteristics:
 Hull has low quarterdeck ,
   a ram bow and a cruiser stern
 Block coefficient (normal/deep): 0.525 / 0.528
 Length to Beam Ratio: 8.92 : 1
 'Natural speed' for length: 28.18 kts
 Power going to wave formation at top speed: 55 %
 Trim (Max stability = 0, Max steadiness = 100): 50
 Bow angle (Positive = bow angles forward): -3.00 degrees
 Stern overhang: -4.00 ft / -1.22 m
 Freeboard (% = length of deck as a percentage of waterline length):
    Fore end,  Aft end
    - Forecastle: 20.00 %,  31.00 ft / 9.45 m,  28.00 ft / 8.53 m
    - Forward deck: 30.00 %,  28.00 ft / 8.53 m,  27.00 ft / 8.23 m
    - Aft deck: 18.00 %,  27.00 ft / 8.23 m,  27.00 ft / 8.23 m
    - Quarter deck: 32.00 %,  19.00 ft / 5.79 m,  19.00 ft / 5.79 m
    - Average freeboard:  25.03 ft / 7.63 m

Ship space, strength and comments:
 Space - Hull below water (magazines/engines, low = better): 126.8 %
  - Above water (accommodation/working, high = better): 212.4 %
 Waterplane Area: 48,179 Square feet or 4,476 Square metres
 Displacement factor (Displacement / loading): 103 %
 Structure weight / hull surface area: 186 lbs/sq ft or 907 Kg/sq metre
 Hull strength (Relative):
  - Cross-sectional: 0.97
  - Longitudinal: 1.35
  - Overall: 1.00
 Hull space for machinery, storage, compartmentation is cramped
 Room for accommodation and workspaces is excellent

So, as built, what speed could the Renown and Repulse make?

I did an experiment to see what the Renown and Repulse, as built, might have been able to make in 1916. My guess is about 33 knots, if the machinery was pressed hard. The report in the 1919 Jane's Fighting Ships that they had reached 41 knots is a joke. Even if they were extremely light, I find that sort of speed to be very doubtful. I might try reducing ammunition supply and fuel to see if they might have been able to faster, without compromising strength too severely. This is the Springsharp report:

Repulse, Great Britain Battlecruiser laid down 1915 (Engine 1919)

Displacement:
 28,729 t light; 29,990 t standard; 31,989 t normal; 33,588 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
 (800.00 ft / 794.00 ft) x 89.00 ft x (29.67 / 30.82 ft)
 (243.84 m / 242.01 m) x 27.13 m  x (9.04 / 9.39 m)

Armament:
      6 - 15.00" / 381 mm 42.0 cal guns - 1,920.00lbs / 870.90kg shells, 90 per gun
   Breech loading guns in turret on barbette mounts , 1915 Model
   3 x Twin mounts on centreline ends, majority forward
  1 raised mount - superfiring
      17 - 4.00" / 102 mm 45.0 cal guns - 32.27lbs / 14.64kg shells, 150 per gun
   Quick firing guns in deck and hoist mounts , 1915 Model
   4 x Twin mounts on sides, evenly spread
   3 x Triple mounts on centreline, aft deck forward
  2 raised mounts - superfiring
 Weight of broadside 12,069 lbs / 12,069 kg

Armour:
   - Belts:  Width (max) Length (avg)  Height (avg)
 Main: 6.00" / 152 mm 490.00 ft / 149.35 m 16.00 ft / 4.88 m
 Ends: 4.00" / 102 mm 300.00 ft / 91.44 m 12.00 ft / 3.66 m
   4.00 ft / 1.22 m Unarmoured ends
   Main Belt covers 95 % of normal length
   Main belt does not fully cover magazines and engineering spaces

   - Torpedo Bulkhead:
  1.50" / 38 mm 490.00 ft / 149.35 m 29.00 ft / 8.84 m

   - Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
 Main: 9.00" / 229 mm 5.00" / 127 mm  7.00" / 178 mm
 2nd: 3.00" / 76 mm       -   2.00" / 51 mm

   - Armour deck: 3.00" / 76 mm, Conning tower: 9.00" / 229 mm

Machinery:
 Oil fired boilers, steam turbines, 
 Geared drive, 4 shafts, 179,547 shp / 133,942 Kw = 33.00 kts
 Range 6,500nm at 15.00 kts
 Bunker at max displacement = 3,598 tons

Complement:
 1,195 - 1,554

Cost:
 £4.081 million / $16.323 million

Distribution of weights at normal displacement:
 Armament: 1,642 tons, 5.1 %
 Armour: 7,670 tons, 24.0 %
    - Belts: 2,532 tons, 7.9 %
    - Torpedo bulkhead: 789 tons, 2.5 %
    - Armament: 1,458 tons, 4.6 %
    - Armour Deck: 2,696 tons, 8.4 %
    - Conning Tower: 195 tons, 0.6 %
 Machinery: 6,376 tons, 19.9 %
 Hull, fittings & equipment: 13,602 tons, 42.5 %
 Fuel, ammunition & stores: 3,260 tons, 10.2 %
 Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
 Survivability (Non-critical penetrating hits needed to sink ship):
   41,011 lbs / 18,602 Kg = 24.3 x 15.0 " / 381 mm shells or 4.8 torpedoes
 Stability (Unstable if below 1.00): 1.14
 Metacentric height 5.4 ft / 1.6 m
 Roll period: 16.1 seconds
 Steadiness - As gun platform (Average = 50 %): 55 %
   - Recoil effect (Restricted arc if above 1.00): 0.93
 Seaboat quality  (Average = 1.00): 1.11

Hull form characteristics:
 Hull has low quarterdeck ,
   a ram bow and a cruiser stern
 Block coefficient (normal/deep): 0.534 / 0.540
 Length to Beam Ratio: 8.92 : 1
 'Natural speed' for length: 28.18 kts
 Power going to wave formation at top speed: 53 %
 Trim (Max stability = 0, Max steadiness = 100): 50
 Bow angle (Positive = bow angles forward): -3.00 degrees
 Stern overhang: -4.00 ft / -1.22 m
 Freeboard (% = length of deck as a percentage of waterline length):
    Fore end,  Aft end
    - Forecastle: 20.00 %,  31.00 ft / 9.45 m,  28.00 ft / 8.53 m
    - Forward deck: 30.00 %,  28.00 ft / 8.53 m,  27.00 ft / 8.23 m
    - Aft deck: 18.00 %,  27.00 ft / 8.23 m,  27.00 ft / 8.23 m
    - Quarter deck: 32.00 %,  19.00 ft / 5.79 m,  19.00 ft / 5.79 m
    - Average freeboard:  25.03 ft / 7.63 m

Ship space, strength and comments:
 Space - Hull below water (magazines/engines, low = better): 117.1 %
  - Above water (accommodation/working, high = better): 211.5 %
 Waterplane Area: 48,585 Square feet or 4,514 Square metres
 Displacement factor (Displacement / loading): 110 %
 Structure weight / hull surface area: 183 lbs/sq ft or 896 Kg/sq metre
 Hull strength (Relative):
  - Cross-sectional: 0.96
  - Longitudinal: 1.34
  - Overall: 1.00
 Hull space for machinery, storage, compartmentation is cramped
 Room for accommodation and workspaces is excellent

The Ger/BB/1907 in Springsharp 3.0b1 Beta

The Ger/BB/1907 design works very well in Springsharp 3.0b1 Beta. The design apparently had more capacity than I would have guessed in 1971. This is my original pencil drawing:

The ship has 8-12in/50 BLR and 12-4in/50 QF guns. The armour basis is 13in with a 3in deck. This is the Springsharp report:

Ger/BB/1907, Germany Battleship laid down 1907 (Engine 1909)

Displacement:
 23,045 t light; 23,941 t standard; 26,598 t normal; 28,724 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
 (628.00 ft / 620.00 ft) x 105.00 ft x (26.00 / 27.64 ft)
 (191.41 m / 188.98 m) x 32.00 m  x (7.92 / 8.42 m)

Armament:
      8 - 12.00" / 305 mm 50.0 cal guns - 910.00lbs / 412.77kg shells, 90 per gun
   Quick firing guns in turret on barbette mounts , 1907 Model
   2 x Single mounts on centreline, evenly spread
  2 raised mounts
   2 x Single mounts on sides, forward evenly spread
   Aft Main mounts separated by engine room
      12 - 4.00" / 102 mm 50.0 cal guns - 33.88lbs / 15.37kg shells, 0 per gun
   Quick firing guns in deck and hoist mounts , 1907 Model
   12 x Twin mounts on sides, evenly spread
 Weight of broadside 7,687 lbs / 7,687 kg
 2 - 18.0" / 457 mm above water torpedoes

Armour:
   - Belts:  Width (max) Length (avg)  Height (avg)
 Main: 13.0" / 330 mm 330.00 ft / 100.58 m 8.00 ft / 2.44 m
 Ends: Unarmoured
 Upper: 8.00" / 203 mm 330.00 ft / 100.58 m 8.00 ft / 2.44 m
   Main Belt covers 82 % of normal length
   Main belt does not fully cover magazines and engineering spaces

   - Torpedo Bulkhead:
  1.50" / 38 mm 330.00 ft / 100.58 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 1.00" / 25 mm  4.00" / 102 mm

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

Machinery:
 Oil fired boilers, steam turbines, 
 Direct drive, 4 shafts, 84,887 shp / 63,325 Kw = 27.00 kts
 Range 6,500nm at 15.00 kts
 Bunker at max displacement = 4,782 tons

Complement:
 1,040 - 1,353

Cost:
 £2.149 million / $8.598 million

Distribution of weights at normal displacement:
 Armament: 1,876 tons, 7.1 %
 Armour: 7,890 tons, 29.7 %
    - Belts: 2,568 tons, 9.7 %
    - Torpedo bulkhead: 476 tons, 1.8 %
    - Armament: 2,132 tons, 8.0 %
    - Armour Deck: 2,522 tons, 9.5 %
    - Conning Tower: 192 tons, 0.7 %
 Machinery: 3,858 tons, 14.5 %
 Hull, fittings & equipment: 10,342 tons, 38.9 %
 Fuel, ammunition & stores: 3,553 tons, 13.4 %
 Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
 Survivability (Non-critical penetrating hits needed to sink ship):
   45,206 lbs / 20,505 Kg = 52.3 x 12.0 " / 305 mm shells or 6.8 torpedoes
 Stability (Unstable if below 1.00): 1.33
 Metacentric height 8.9 ft / 2.7 m
 Roll period: 14.8 seconds
 Steadiness - As gun platform (Average = 50 %): 64 %
   - Recoil effect (Restricted arc if above 1.00): 0.31
 Seaboat quality  (Average = 1.00): 1.27

Hull form characteristics:
 Hull has rise forward of midbreak,
   a ram bow and a cruiser stern
 Block coefficient (normal/deep): 0.550 / 0.559
 Length to Beam Ratio: 5.90 : 1
 'Natural speed' for length: 24.90 kts
 Power going to wave formation at top speed: 55 %
 Trim (Max stability = 0, Max steadiness = 100): 50
 Bow angle (Positive = bow angles forward): -3.00 degrees
 Stern overhang: -3.00 ft / -0.91 m
 Freeboard (% = length of deck as a percentage of waterline length):
    Fore end,  Aft end
    - Forecastle: 28.00 %,  28.00 ft / 8.53 m,  27.00 ft / 8.23 m
    - Forward deck: 40.00 %,  27.00 ft / 8.23 m,  27.00 ft / 8.23 m
    - Aft deck: 17.00 %,  19.00 ft / 5.79 m,  19.00 ft / 5.79 m
    - Quarter deck: 15.00 %,  19.00 ft / 5.79 m,  20.00 ft / 6.10 m
    - Average freeboard:  24.63 ft / 7.51 m

Ship space, strength and comments:
 Space - Hull below water (magazines/engines, low = better): 91.8 %
  - Above water (accommodation/working, high = better): 201.6 %
 Waterplane Area: 45,433 Square feet or 4,221 Square metres
 Displacement factor (Displacement / loading): 114 %
 Structure weight / hull surface area: 166 lbs/sq ft or 813 Kg/sq metre
 Hull strength (Relative):
  - Cross-sectional: 0.93
  - Longitudinal: 1.79
  - Overall: 1.00
 Hull space for machinery, storage, compartmentation is adequate
 Room for accommodation and workspaces is excellent
 Good seaboat, rides out heavy weather easily

"Wish List" for Springsharp

Top on my "Wish List" for Springsharp is better power calculations for small, fast ships like destroyers. Next on my list is to have some other mechanism for setting power per machinery weight other than setting the machinery date. The British super destroyer Swift, designed in 1905 was able to achieve a peak power output of 60 SHP/ton of machinery. The British Arethusa class light cruisers designed in 1912 had a power output of 40 SHP/ton of machinery. The power output of the Swift probably can't be reproduced in Springsharp, even with a 1950 machinery date. I would still like the ability to arbitrarily set power for machinery weight, perhaps with an indication of just how radical the figure that I choose is.

Another attempt at the Ger/CS/1905 scout cruiser

I just used Springsharp 3.0b1 Beta to do a design for the Ger/CS/1905 scout cruiser, which was my attempt at a "Super Swift", except for 1905 for the Germans. My version that I intended to produce in numbers was to have 2in armour over the machinery spaces. I could only manage 34 knots, rather than the hoped for 36 knots. The problem was seakeeping, primarily. This is my drawing of one of the ships:

This is the Springsharp report:

Ger/CS/1905, Germany Scout Cruiser laid down 1905 (Engine 1945)

Displacement:
 2,073 t light; 2,133 t standard; 2,334 t normal; 2,495 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
 (372.10 ft / 370.00 ft) x 38.00 ft x (14.00 / 14.65 ft)
 (113.42 m / 112.78 m) x 11.58 m  x (4.27 / 4.46 m)

Armament:
      5 - 4.00" / 102 mm 50.0 cal guns - 32.00lbs / 14.51kg shells, 150 per gun
   Quick firing guns in deck and hoist mounts , 1905 Model
   3 x Single mounts on centreline, evenly spread
   2 x Single mounts on sides, forward evenly spread
 Weight of broadside 160 lbs / 160 kg
 2 - 18.0" / 457 mm above water torpedoes

Armour:
   - Belts:  Width (max) Length (avg)  Height (avg)
 Main: 2.00" / 51 mm 240.00 ft / 73.15 m 8.00 ft / 2.44 m
 Ends: Unarmoured
 Upper: 2.00" / 51 mm 150.00 ft / 45.72 m 8.00 ft / 2.44 m
   Main Belt covers 100 % of normal length
   Main belt does not fully cover magazines and engineering spaces

   - Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
 Main: 3.00" / 76 mm       -   3.00" / 76 mm

Machinery:
 Oil fired boilers, steam turbines, 
 Direct drive, 2 shafts, 52,833 shp / 39,413 Kw = 34.00 kts
 Range 4,200nm at 15.00 kts
 Bunker at max displacement = 362 tons

Complement:
 167 - 218

Cost:
 £0.250 million / $1.000 million

Distribution of weights at normal displacement:
 Armament: 52 tons, 2.2 %
 Armour: 305 tons, 13.1 %
    - Belts: 269 tons, 11.5 %
    - Torpedo bulkhead: 0 tons, 0.0 %
    - Armament: 37 tons, 1.6 %
    - Armour Deck: 0 tons, 0.0 %
    - Conning Tower: 0 tons, 0.0 %
 Machinery: 1,138 tons, 48.7 %
 Hull, fittings & equipment: 608 tons, 26.1 %
 Fuel, ammunition & stores: 261 tons, 11.2 %
 Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
 Survivability (Non-critical penetrating hits needed to sink ship):
   681 lbs / 309 Kg = 21.3 x 4.0 " / 102 mm shells or 0.4 torpedoes
 Stability (Unstable if below 1.00): 1.30
 Metacentric height 1.9 ft / 0.6 m
 Roll period: 11.7 seconds
 Steadiness - As gun platform (Average = 50 %): 53 %
   - Recoil effect (Restricted arc if above 1.00): 0.15
 Seaboat quality  (Average = 1.00): 1.02

Hull form characteristics:
 Hull has raised forecastle,
   a normal bow and a round stern
 Block coefficient (normal/deep): 0.415 / 0.424
 Length to Beam Ratio: 9.74 : 1
 'Natural speed' for length: 19.24 kts
 Power going to wave formation at top speed: 68 %
 Trim (Max stability = 0, Max steadiness = 100): 52
 Bow angle (Positive = bow angles forward): 5.00 degrees
 Stern overhang: 0.00 ft / 0.00 m
 Freeboard (% = length of deck as a percentage of waterline length):
    Fore end,  Aft end
    - Forecastle: 28.00 %,  24.00 ft / 7.32 m,  22.00 ft / 6.71 m
    - Forward deck: 30.00 %,  14.00 ft / 4.27 m,  14.00 ft / 4.27 m
    - Aft deck: 27.00 %,  14.00 ft / 4.27 m,  14.00 ft / 4.27 m
    - Quarter deck: 15.00 %,  14.00 ft / 4.27 m,  14.00 ft / 4.27 m
    - Average freeboard:  16.46 ft / 5.02 m

Ship space, strength and comments:
 Space - Hull below water (magazines/engines, low = better): 164.6 %
  - Above water (accommodation/working, high = better): 129.4 %
 Waterplane Area: 8,736 Square feet or 812 Square metres
 Displacement factor (Displacement / loading): 74 %
 Structure weight / hull surface area: 35 lbs/sq ft or 170 Kg/sq metre
 Hull strength (Relative):
  - Cross-sectional: 0.49
  - Longitudinal: 1.87
  - Overall: 0.56
 Hull space for machinery, storage, compartmentation is cramped
 Room for accommodation and workspaces is excellent

An anachronistic King Edward VII design

I have a pencil drawing of an anchronistic King Edward VII class battleship that I probably drew in the latter 1980's:

It is a rather bad photograph, but you can get the general idea of what I was doing. The Springsharp design worked out amazingly well. I suppose it was because of the later engine date that made the weight lighter. This is the Springsharp 3.0b1 Beta report:

King Edward VII, anachronistic, Great Britain Battleship laid down 1907 (Engine 1909)

Displacement:
 14,175 t light; 15,000 t standard; 16,606 t normal; 17,890 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
 (451.75 ft / 450.00 ft) x 78.00 ft x (26.75 / 28.47 ft)
 (137.69 m / 137.16 m) x 23.77 m  x (8.15 / 8.68 m)

Armament:
      4 - 12.00" / 305 mm 45.0 cal guns - 850.00lbs / 385.55kg shells, 150 per gun
   Breech loading guns in turret on barbette mounts , 1907 Model
   2 x Twin mounts on centreline ends, evenly spread
      4 - 9.20" / 234 mm 45.0 cal guns - 380.00lbs / 172.37kg shells, 150 per gun
   Breech loading guns in turret on barbette mounts , 1907 Model
   2 x Twin mounts on centreline ends, evenly spread
  2 raised mounts
      10 - 6.00" / 152 mm 50.0 cal guns - 100.00lbs / 45.36kg shells, 150 per gun
   Quick firing guns in turret on barbette mounts , 1907 Model
   2 x Triple mounts on sides, forward deck aft
   2 x Twin mounts on sides, aft deck forward
 Weight of broadside 5,920 lbs / 5,920 kg
 4 - 18.0" / 457 mm above water torpedoes

Armour:
   - Belts:  Width (max) Length (avg)  Height (avg)
 Main: 9.00" / 229 mm 290.00 ft / 88.39 m 16.00 ft / 4.88 m
 Ends: 5.00" / 127 mm 160.00 ft / 48.77 m 12.00 ft / 3.66 m
   Main Belt covers 99 % of normal length
   Main belt does not fully cover magazines and engineering spaces

   - Torpedo Bulkhead:
  1.50" / 38 mm 290.00 ft / 88.39 m 26.75 ft / 8.15 m

   - Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
 Main: 9.00" / 229 mm 6.00" / 152 mm  12.0" / 305 mm
 2nd: 7.00" / 178 mm 4.00" / 102 mm  7.00" / 178 mm
 3rd: 5.00" / 127 mm 3.00" / 76 mm  5.00" / 127 mm

   - Armour deck: 2.00" / 51 mm, Conning tower: 9.00" / 229 mm

Machinery:
 Coal fired boilers, complex reciprocating steam engines, 
 Direct drive, 2 shafts, 26,827 ihp / 20,013 Kw = 21.00 kts
 Range 4,500nm at 14.00 kts
 Bunker at max displacement = 2,889 tons (100% coal)

Complement:
 730 - 950

Cost:
 £1.377 million / $5.510 million

Distribution of weights at normal displacement:
 Armament: 1,259 tons, 7.6 %
 Armour: 5,420 tons, 32.6 %
    - Belts: 2,211 tons, 13.3 %
    - Torpedo bulkhead: 431 tons, 2.6 %
    - Armament: 1,685 tons, 10.1 %
    - Armour Deck: 967 tons, 5.8 %
    - Conning Tower: 126 tons, 0.8 %
 Machinery: 2,064 tons, 12.4 %
 Hull, fittings & equipment: 5,986 tons, 36.0 %
 Fuel, ammunition & stores: 2,431 tons, 14.6 %
 Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
 Survivability (Non-critical penetrating hits needed to sink ship):
   23,439 lbs / 10,632 Kg = 27.1 x 12.0 " / 305 mm shells or 3.9 torpedoes
 Stability (Unstable if below 1.00): 1.13
 Metacentric height 4.4 ft / 1.3 m
 Roll period: 15.7 seconds
 Steadiness - As gun platform (Average = 50 %): 73 %
   - Recoil effect (Restricted arc if above 1.00): 0.76
 Seaboat quality  (Average = 1.00): 1.47

Hull form characteristics:
 Hull has a flush deck,
   a normal bow and a cruiser stern
 Block coefficient (normal/deep): 0.619 / 0.627
 Length to Beam Ratio: 5.77 : 1
 'Natural speed' for length: 21.21 kts
 Power going to wave formation at top speed: 53 %
 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 (% = length of deck as a percentage of waterline length):
    Fore end,  Aft end
    - Forecastle: 20.00 %,  25.00 ft / 7.62 m,  23.00 ft / 7.01 m
    - Forward deck: 30.00 %,  23.00 ft / 7.01 m,  21.00 ft / 6.40 m
    - Aft deck: 35.00 %,  21.00 ft / 6.40 m,  21.00 ft / 6.40 m
    - Quarter deck: 15.00 %,  21.00 ft / 6.40 m,  20.00 ft / 6.10 m
    - Average freeboard:  21.79 ft / 6.64 m

Ship space, strength and comments:
 Space - Hull below water (magazines/engines, low = better): 99.3 %
  - Above water (accommodation/working, high = better): 137.9 %
 Waterplane Area: 26,130 Square feet or 2,428 Square metres
 Displacement factor (Displacement / loading): 109 %
 Structure weight / hull surface area: 152 lbs/sq ft or 745 Kg/sq metre
 Hull strength (Relative):
  - Cross-sectional: 0.90
  - Longitudinal: 2.54
  - Overall: 1.00
 Hull space for machinery, storage, compartmentation is adequate
 Room for accommodation and workspaces is excellent
 Ship has slow, easy roll, a good, steady gun platform
 Good seaboat, rides out heavy weather easily

A rather edgy, anachronistic Invincible design

This is based on this pencil drawing that I believe dates from the latter 1980's:

The ship has 8-12in/45 guns in three turrets, the twin being superfiring. The hull is flush-decked and the ship has oil-fired boilers. As you can see, this drawing is extremely freehand. The date of the machinery and the oil-fired boilers makes for a much better ship than the original. This is the corresponding Springsharp report:

Invincible, Great Britain Battlecruiser laid down 1912 (Engine 1914)

Displacement:
 16,178 t light; 16,942 t standard; 18,398 t normal; 19,563 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
 (567.91 ft / 567.00 ft) x 78.00 ft x (26.00 / 27.31 ft)
 (173.10 m / 172.82 m) x 23.77 m  x (7.92 / 8.32 m)

Armament:
      8 - 12.00" / 305 mm 45.0 cal guns - 871.37lbs / 395.24kg shells, 90 per gun
   Breech loading guns in turret on barbette mounts , 1912 Model
   2 x Triple mounts on centreline ends, majority forward
   1 x Twin mount on centreline, forward evenly spread
  1 raised mount
      16 - 4.00" / 102 mm 45.0 cal guns - 32.27lbs / 14.64kg shells, 150 per gun
   Quick firing guns in deck and hoist mounts , 1912 Model
   8 x Twin mounts on sides, forward deck aft
  8 raised mounts
      4 - 3.00" / 76.2 mm 45.0 cal guns - 13.62lbs / 6.18kg shells, 150 per gun
   Anti-air guns in deck and hoist mounts , 1912 Model
   4 x 2 row sextuple mounts on sides, aft deck forward
 Weight of broadside 7,542 lbs / 7,542 kg

Armour:
   - Belts:  Width (max) Length (avg)  Height (avg)
 Main: 6.00" / 152 mm 370.00 ft / 112.78 m 16.00 ft / 4.88 m
 Ends: 4.00" / 102 mm 190.00 ft / 57.91 m 16.00 ft / 4.88 m
   7.00 ft / 2.13 m Unarmoured ends
   Main Belt covers 100 % of normal length
   Main belt does not fully cover magazines and engineering spaces

   - Torpedo Bulkhead:
  1.50" / 38 mm 370.00 ft / 112.78 m 26.00 ft / 7.92 m

   - Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
 Main: 7.00" / 178 mm 5.00" / 127 mm  7.00" / 178 mm
 2nd: 4.00" / 102 mm 1.00" / 25 mm  4.00" / 102 mm

   - Armour deck: 2.00" / 51 mm, Conning tower: 7.00" / 178 mm

Machinery:
 Oil fired boilers, steam turbines, 
 Direct drive, 4 shafts, 78,432 shp / 58,510 Kw = 28.00 kts
 Range 5,600nm at 15.00 kts
 Bunker at max displacement = 2,621 tons

Complement:
 789 - 1,026

Cost:
 £1.695 million / $6.781 million

Distribution of weights at normal displacement:
 Armament: 1,369 tons, 7.4 %
 Armour: 4,864 tons, 26.4 %
    - Belts: 1,978 tons, 10.8 %
    - Torpedo bulkhead: 534 tons, 2.9 %
    - Armament: 1,095 tons, 5.9 %
    - Armour Deck: 1,153 tons, 6.3 %
    - Conning Tower: 105 tons, 0.6 %
 Machinery: 3,021 tons, 16.4 %
 Hull, fittings & equipment: 7,452 tons, 40.5 %
 Fuel, ammunition & stores: 2,220 tons, 12.1 %
 Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
 Survivability (Non-critical penetrating hits needed to sink ship):
   23,010 lbs / 10,437 Kg = 26.6 x 12.0 " / 305 mm shells or 3.3 torpedoes
 Stability (Unstable if below 1.00): 1.14
 Metacentric height 4.4 ft / 1.3 m
 Roll period: 15.6 seconds
 Steadiness - As gun platform (Average = 50 %): 52 %
   - Recoil effect (Restricted arc if above 1.00): 0.82
 Seaboat quality  (Average = 1.00): 1.04

Hull form characteristics:
 Hull has a flush deck,
   a normal bow and a cruiser stern
 Block coefficient (normal/deep): 0.560 / 0.567
 Length to Beam Ratio: 7.27 : 1
 'Natural speed' for length: 23.81 kts
 Power going to wave formation at top speed: 57 %
 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 (% = length of deck as a percentage of waterline length):
    Fore end,  Aft end
    - Forecastle: 20.00 %,  26.00 ft / 7.92 m,  23.00 ft / 7.01 m
    - Forward deck: 30.00 %,  23.00 ft / 7.01 m,  22.00 ft / 6.71 m
    - Aft deck: 35.00 %,  22.00 ft / 6.71 m,  21.00 ft / 6.40 m
    - Quarter deck: 15.00 %,  21.00 ft / 6.40 m,  20.00 ft / 6.10 m
    - Average freeboard:  22.19 ft / 6.76 m
 Ship tends to be wet forward

Ship space, strength and comments:
 Space - Hull below water (magazines/engines, low = better): 118.3 %
  - Above water (accommodation/working, high = better): 165.2 %
 Waterplane Area: 31,156 Square feet or 2,894 Square metres
 Displacement factor (Displacement / loading): 104 %
 Structure weight / hull surface area: 157 lbs/sq ft or 768 Kg/sq metre
 Hull strength (Relative):
  - Cross-sectional: 0.93
  - Longitudinal: 1.81
  - Overall: 1.00
 Hull space for machinery, storage, compartmentation is cramped
 Room for accommodation and workspaces is excellent

My Queen Elizabeth-looking Dreadnought design

I have a series of anachronistic designs that resemble something like the Queen Elizabeth, as remodelled in 1940, except for having a flush deck and straight stem. This is my original pencil drawing:

We shall see if this is too large for the blog layout I am using. This is the accompanying Springsharp report:

Dreadnought, Great Britain Battleship laid down 1907 (Engine 1909)

Displacement:
 16,570 t light; 17,695 t standard; 19,627 t normal; 21,173 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
 (525.00 ft / 525.00 ft) x 82.00 ft x (27.00 / 28.73 ft)
 (160.02 m / 160.02 m) x 24.99 m  x (8.23 / 8.76 m)

Armament:
      10 - 12.00" / 305 mm 45.0 cal guns - 850.00lbs / 385.55kg shells, 150 per gun
   Breech loading guns in turret on barbette mounts , 1907 Model
   2 x Triple mounts on centreline ends, evenly spread
   2 x Twin mounts on centreline ends, evenly spread
  2 raised mounts
      24 - 3.00" / 76.2 mm 50.0 cal guns - 12.00lbs / 5.44kg shells, 150 per gun
   Breech loading guns in deck and hoist mounts , 1907 Model
   8 x Twin mounts on sides, forward deck aft
  8 raised mounts
   4 x Twin mounts on sides, aft deck forward
  4 raised mounts
 Weight of broadside 8,788 lbs / 8,788 kg

Armour:
   - Belts:  Width (max) Length (avg)  Height (avg)
 Main: 11.0" / 279 mm 355.00 ft / 108.20 m 8.00 ft / 2.44 m
 Ends: 8.00" / 203 mm 355.00 ft / 108.20 m 8.00 ft / 2.44 m
   Main Belt covers 104 % of normal length

   - Torpedo Bulkhead:
  2.00" / 51 mm 355.00 ft / 108.20 m 27.00 ft / 8.23 m

   - Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
 Main: 11.0" / 279 mm 7.00" / 178 mm  11.0" / 279 mm
 2nd: 2.00" / 51 mm 1.00" / 25 mm  2.00" / 51 mm

   - Armour deck: 3.00" / 76 mm, Conning tower: 11.00" / 279 mm

Machinery:
 Coal fired boilers, steam turbines, 
 Direct drive, 4 shafts, 27,672 shp / 20,644 Kw = 21.00 kts
 Range 4,800nm at 14.00 kts
 Bunker at max displacement = 3,477 tons (100% coal)

Complement:
 828 - 1,077

Cost:
 £1.625 million / $6.501 million

Distribution of weights at normal displacement:
 Armament: 1,637 tons, 8.3 %
 Armour: 6,757 tons, 34.4 %
    - Belts: 2,195 tons, 11.2 %
    - Torpedo bulkhead: 709 tons, 3.6 %
    - Armament: 1,947 tons, 9.9 %
    - Armour Deck: 1,733 tons, 8.8 %
    - Conning Tower: 172 tons, 0.9 %
 Machinery: 1,384 tons, 7.0 %
 Hull, fittings & equipment: 7,416 tons, 37.8 %
 Fuel, ammunition & stores: 3,057 tons, 15.6 %
 Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
 Survivability (Non-critical penetrating hits needed to sink ship):
   29,537 lbs / 13,398 Kg = 34.2 x 12.0 " / 305 mm shells or 5.5 torpedoes
 Stability (Unstable if below 1.00): 1.09
 Metacentric height 4.4 ft / 1.3 m
 Roll period: 16.4 seconds
 Steadiness - As gun platform (Average = 50 %): 70 %
   - Recoil effect (Restricted arc if above 1.00): 0.85
 Seaboat quality  (Average = 1.00): 1.40

Hull form characteristics:
 Hull has a flush deck,
   a normal bow and a cruiser stern
 Block coefficient (normal/deep): 0.591 / 0.599
 Length to Beam Ratio: 6.40 : 1
 'Natural speed' for length: 22.91 kts
 Power going to wave formation at top speed: 46 %
 Trim (Max stability = 0, Max steadiness = 100): 50
 Bow angle (Positive = bow angles forward): 0.00 degrees
 Stern overhang: -2.00 ft / -0.61 m
 Freeboard (% = length of deck as a percentage of waterline length):
    Fore end,  Aft end
    - Forecastle: 20.00 %,  24.00 ft / 7.32 m,  20.00 ft / 6.10 m
    - Forward deck: 30.00 %,  20.00 ft / 6.10 m,  18.00 ft / 5.49 m
    - Aft deck: 35.00 %,  18.00 ft / 5.49 m,  18.00 ft / 5.49 m
    - Quarter deck: 15.00 %,  18.00 ft / 5.49 m,  19.00 ft / 5.79 m
    - Average freeboard:  19.10 ft / 5.82 m
 Ship tends to be wet forward

Ship space, strength and comments:
 Space - Hull below water (magazines/engines, low = better): 84.3 %
  - Above water (accommodation/working, high = better): 132.6 %
 Waterplane Area: 31,222 Square feet or 2,901 Square metres
 Displacement factor (Displacement / loading): 111 %
 Structure weight / hull surface area: 165 lbs/sq ft or 805 Kg/sq metre
 Hull strength (Relative):
  - Cross-sectional: 0.94
  - Longitudinal: 1.68
  - Overall: 1.00
 Hull space for machinery, storage, compartmentation is adequate
 Room for accommodation and workspaces is excellent
 Ship has slow, easy roll, a good, steady gun platform
 Good seaboat, rides out heavy weather easily

The GB/CS/1915 works extremely well in Springsharp 3.0b1 Beta

I am really pleased with how well that the GB/CS/1915 works in Springsharp 3.0b1 Beta. My friend Cliff's original concept from 1971 is vindicated by what I am seeing. This is a photo of one of the ships at sea:

This photo gives a very good idea of the original sketch design, as I tried very hard to give an accurate presentation. One of the ships has a length of 405ft, a speed of 32 knots, and an armament of 4-6in/50 QF guns with 4-21in TT. This is the Springsharp report:

GB/CS/1915, Great Britain Scout Cruiser laid down 1915 (Engine 1941)

Displacement:
 3,270 t light; 3,382 t standard; 3,736 t normal; 4,019 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
 (413.76 ft / 405.00 ft) x 41.00 ft x (15.00 / 15.87 ft)
 (126.11 m / 123.44 m) x 12.50 m  x (4.57 / 4.84 m)

Armament:
      4 - 6.00" / 152 mm 50.0 cal guns - 114.33lbs / 51.86kg shells, 150 per gun
   Quick firing guns in deck and hoist mounts , 1915 Model
   4 x Single mounts on centreline ends, evenly spread
  2 raised mounts - superfiring
 Weight of broadside 457 lbs / 457 kg
 4 - 21.0" / 533 mm above water torpedoes

Armour:
   - Belts:  Width (max) Length (avg)  Height (avg)
 Main: 2.00" / 51 mm 270.00 ft / 82.30 m 12.00 ft / 3.66 m
 Ends: Unarmoured
   Main Belt covers 103 % of normal length
   Main belt does not fully cover magazines and engineering spaces

   - Torpedo Bulkhead:
  0.50" / 13 mm 270.00 ft / 82.30 m 15.00 ft / 4.57 m

   - Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
 Main: 4.00" / 102 mm 1.00" / 25 mm  4.00" / 102 mm

   - Armour deck: 2.00" / 51 mm, Conning tower: 4.00" / 102 mm

Machinery:
 Oil fired boilers, steam turbines, 
 Geared drive, 2 shafts, 55,669 shp / 41,529 Kw = 32.00 kts
 Range 5,400nm at 15.00 kts
 Bunker at max displacement = 637 tons

Complement:
 238 - 310

Cost:
 £0.527 million / $2.106 million

Distribution of weights at normal displacement:
 Armament: 135 tons, 3.6 %
 Armour: 830 tons, 22.2 %
    - Belts: 269 tons, 7.2 %
    - Torpedo bulkhead: 75 tons, 2.0 %
    - Armament: 46 tons, 1.2 %
    - Armour Deck: 419 tons, 11.2 %
    - Conning Tower: 21 tons, 0.6 %
 Machinery: 1,426 tons, 38.2 %
 Hull, fittings & equipment: 957 tons, 25.6 %
 Fuel, ammunition & stores: 467 tons, 12.5 %
 Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
 Survivability (Non-critical penetrating hits needed to sink ship):
   1,625 lbs / 737 Kg = 15.0 x 6.0 " / 152 mm shells or 0.6 torpedoes
 Stability (Unstable if below 1.00): 1.15
 Metacentric height 1.7 ft / 0.5 m
 Roll period: 13.2 seconds
 Steadiness - As gun platform (Average = 50 %): 64 %
   - Recoil effect (Restricted arc if above 1.00): 0.56
 Seaboat quality  (Average = 1.00): 1.13

Hull form characteristics:
 Hull has a flush deck,
   a normal bow and a cruiser stern
 Block coefficient (normal/deep): 0.525 / 0.534
 Length to Beam Ratio: 9.88 : 1
 'Natural speed' for length: 20.12 kts
 Power going to wave formation at top speed: 66 %
 Trim (Max stability = 0, Max steadiness = 100): 57
 Bow angle (Positive = bow angles forward): 10.00 degrees
 Stern overhang: 4.00 ft / 1.22 m
 Freeboard (% = length of deck as a percentage of waterline length):
    Fore end,  Aft end
    - Forecastle: 20.00 %,  27.00 ft / 8.23 m,  22.00 ft / 6.71 m
    - Forward deck: 30.00 %,  22.00 ft / 6.71 m,  18.00 ft / 5.49 m
    - Aft deck: 35.00 %,  18.00 ft / 5.49 m,  15.00 ft / 4.57 m
    - Quarter deck: 15.00 %,  15.00 ft / 4.57 m,  14.00 ft / 4.27 m
    - Average freeboard:  18.75 ft / 5.72 m

Ship space, strength and comments:
 Space - Hull below water (magazines/engines, low = better): 264.4 %
  - Above water (accommodation/working, high = better): 136.9 %
 Waterplane Area: 11,321 Square feet or 1,052 Square metres
 Displacement factor (Displacement / loading): 88 %
 Structure weight / hull surface area: 42 lbs/sq ft or 204 Kg/sq metre
 Hull strength (Relative):
  - Cross-sectional: 0.51
  - Longitudinal: 1.82
  - Overall: 0.58
 Hull space for machinery, storage, compartmentation is extremely poor
 Room for accommodation and workspaces is excellent

A Super Lion battlecruiser design with Springsharp 3.0b1 Beta

I tried a Super Lion design with Springsharp 3.0b1 Beta, and was pleased with the result. A purist might complain that I am going too large for the date, but I think that a 30-knot ship with 10-15in guns needs to be large. I went with Admiral Fisher's "limited armour", as well. For those not familiar with the Super Lion, Winston Churchill discusses Admiral Fisher's concept in Vol.I of The World Crisis. This is my favorite photograph of a Super Lion:

This is the Springsharp report:

GB/CB/1912 Super Lion, Great Britain Battlecruiser laid down 1912

Displacement:
 33,912 t light; 35,772 t standard; 39,169 t normal; 41,886 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
 (792.00 ft / 785.00 ft) x 97.00 ft x (28.00 / 29.64 ft)
 (241.40 m / 239.27 m) x 29.57 m  x (8.53 / 9.03 m)

Armament:
      10 - 15.00" / 381 mm 42.0 cal guns - 1,920.00lbs / 870.90kg shells, 90 per gun
   Breech loading guns in turret on barbette mounts , 1912 Model
   4 x Twin mounts on centreline ends, majority forward
  2 raised mounts - superfiring
   1 x Twin mount on centreline, aft deck forward
      14 - 6.00" / 152 mm 45.0 cal guns - 100.00lbs / 45.36kg shells, 150 per gun
   Quick firing guns in casemate mounts , 1912 Model
   14 x Single mounts on sides, evenly spread
  14 hull mounts in casemates- Limited use in heavy seas
 Weight of broadside 20,600 lbs / 20,600 kg
 4 - 21.0" / 533 mm above water torpedoes

Armour:
   - Belts:  Width (max) Length (avg)  Height (avg)
 Main: 8.00" / 203 mm 490.00 ft / 149.35 m 8.00 ft / 2.44 m
 Ends: Unarmoured
 Upper: 6.00" / 152 mm 490.00 ft / 149.35 m 8.00 ft / 2.44 m
   Main Belt covers 96 % of normal length
   Main belt does not fully cover magazines and engineering spaces

   - Torpedo Bulkhead:
  2.00" / 51 mm 490.00 ft / 149.35 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: 6.00" / 152 mm 4.00" / 102 mm  6.00" / 152 mm

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

Machinery:
 Oil fired boilers, steam turbines, 
 Direct drive, 4 shafts, 149,032 shp / 111,178 Kw = 30.00 kts
 Range 7,500nm at 15.00 kts
 Bunker at max displacement = 6,114 tons

Complement:
 1,391 - 1,809

Cost:
 £3.515 million / $14.059 million

Distribution of weights at normal displacement:
 Armament: 2,794 tons, 7.1 %
 Armour: 9,743 tons, 24.9 %
    - Belts: 2,363 tons, 6.0 %
    - Torpedo bulkhead: 1,015 tons, 2.6 %
    - Armament: 2,949 tons, 7.5 %
    - Armour Deck: 3,217 tons, 8.2 %
    - Conning Tower: 199 tons, 0.5 %
 Machinery: 5,942 tons, 15.2 %
 Hull, fittings & equipment: 16,446 tons, 42.0 %
 Fuel, ammunition & stores: 5,257 tons, 13.4 %
 Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
 Survivability (Non-critical penetrating hits needed to sink ship):
   54,691 lbs / 24,808 Kg = 32.4 x 15.0 " / 381 mm shells or 6.8 torpedoes
 Stability (Unstable if below 1.00): 1.21
 Metacentric height 6.8 ft / 2.1 m
 Roll period: 15.6 seconds
 Steadiness - As gun platform (Average = 50 %): 51 %
   - Recoil effect (Restricted arc if above 1.00): 0.99
 Seaboat quality  (Average = 1.00): 1.15

Hull form characteristics:
 Hull has low quarterdeck ,
   a ram bow and a cruiser stern
 Block coefficient (normal/deep): 0.643 / 0.650
 Length to Beam Ratio: 8.09 : 1
 'Natural speed' for length: 28.02 kts
 Power going to wave formation at top speed: 52 %
 Trim (Max stability = 0, Max steadiness = 100): 44
 Bow angle (Positive = bow angles forward): -2.00 degrees
 Stern overhang: -2.00 ft / -0.61 m
 Freeboard (% = length of deck as a percentage of waterline length):
    Fore end,  Aft end
    - Forecastle: 20.00 %,  31.00 ft / 9.45 m,  27.00 ft / 8.23 m
    - Forward deck: 30.00 %,  27.00 ft / 8.23 m,  27.00 ft / 8.23 m
    - Aft deck: 17.00 %,  27.00 ft / 8.23 m,  27.00 ft / 8.23 m
    - Quarter deck: 33.00 %,  19.00 ft / 5.79 m,  20.00 ft / 6.10 m
    - Average freeboard:  24.85 ft / 7.57 m

Ship space, strength and comments:
 Space - Hull below water (magazines/engines, low = better): 106.4 %
  - Above water (accommodation/working, high = better): 206.5 %
 Waterplane Area: 57,958 Square feet or 5,384 Square metres
 Displacement factor (Displacement / loading): 109 %
 Structure weight / hull surface area: 201 lbs/sq ft or 981 Kg/sq metre
 Hull strength (Relative):
  - Cross-sectional: 0.98
  - Longitudinal: 1.26
  - Overall: 1.00
 Hull space for machinery, storage, compartmentation is adequate
 Room for accommodation and workspaces is excellent

I am having Springsharp 3.0b1 Beta troubles

I am seeing the sort of problems that exist with Springsharp 3.0b1 Beta. They seem to center around the "Speed, Range, and Power" page and what shows up in the "Performance" and "Report" pages. I am trying to do a BB-27 Michigan design (photo from this New York Shipbuilding site), and odd things are happening. The "Composite Strength" is bouncing around with what I would expect to be only marginally related changes. The Michigan is interesting to me because it was very small, but had 8-12in guns, with superfiring turrets. It is the earliest example of a more modern layout. The Dreadnought was still using a pre-Dreadnought layout, in may ways (oddly enough). This is the Springsharp report:

BB-27 Michigan, United States Battleship laid down 1905 (Engine 1908)

Displacement:
 14,612 t light; 15,311 t standard; 16,457 t normal; 17,374 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
 (458.00 ft / 450.00 ft) x 80.00 ft x (25.00 / 26.17 ft)
 (139.60 m / 137.16 m) x 24.38 m  x (7.62 / 7.98 m)

Armament:
      8 - 12.00" / 305 mm 45.0 cal guns - 860.00lbs / 390.09kg shells, 90 per gun
   Breech loading guns in turret on barbette mounts , 1905 Model
   8 x Twin mounts on centreline ends, evenly spread
  4 raised mounts - superfiring
      22 - 3.00" / 76.2 mm 45.0 cal guns - 13.62lbs / 6.18kg shells, 150 per gun
   Quick firing guns in casemate mounts , 1905 Model
   22 x Single mounts on sides, evenly spread
  10 raised mounts
 Weight of broadside 7,180 lbs / 7,180 kg
 2 - 21.0" / 533 mm above water torpedoes

Armour:
   - Belts:  Width (max) Length (avg)  Height (avg)
 Main: 12.0" / 305 mm 300.00 ft / 91.44 m 8.00 ft / 2.44 m
 Ends: Unarmoured
 Upper: 8.00" / 203 mm 300.00 ft / 91.44 m 8.00 ft / 2.44 m
   Main Belt covers 103 % of normal length

   - Torpedo Bulkhead:
  1.50" / 38 mm 300.00 ft / 91.44 m 24.50 ft / 7.47 m

   - Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
 Main: 12.0" / 305 mm 8.00" / 203 mm  10.0" / 254 mm
 2nd: 8.00" / 203 mm 2.00" / 51 mm  8.00" / 203 mm

   - Armour deck: 2.00" / 51 mm, Conning tower: 12.00" / 305 mm

Machinery:
 Coal fired boilers, complex reciprocating steam engines, 
 ERROR: Revise drives, 2 shafts, 16,498 ihp / 12,308 Kw = 18.50 kts
 Range 4,500nm at 12.00 kts
 Bunker at max displacement = 2,064 tons (100% coal)

Complement:
 726 - 944

Cost:
 £1.387 million / $5.548 million

Distribution of weights at normal displacement:
 Armament: 1,296 tons, 7.9 %
 Armour: 6,184 tons, 37.6 %
    - Belts: 2,126 tons, 12.9 %
    - Torpedo bulkhead: 408 tons, 2.5 %
    - Armament: 2,472 tons, 15.0 %
    - Armour Deck: 1,011 tons, 6.1 %
    - Conning Tower: 167 tons, 1.0 %
 Machinery: 1,500 tons, 9.1 %
 Hull, fittings & equipment: 6,137 tons, 37.3 %
 Fuel, ammunition & stores: 1,845 tons, 11.2 %
 Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
 Survivability (Non-critical penetrating hits needed to sink ship):
   22,926 lbs / 10,399 Kg = 26.5 x 12.0 " / 305 mm shells or 4.4 torpedoes
 Stability (Unstable if below 1.00): 1.02
 Metacentric height 3.7 ft / 1.1 m
 Roll period: 17.4 seconds
 Steadiness - As gun platform (Average = 50 %): 59 %
   - Recoil effect (Restricted arc if above 1.00): 0.88
 Seaboat quality  (Average = 1.00): 1.38

Hull form characteristics:
 Hull has rise forward of midbreak,
   a ram bow and a cruiser stern
 Block coefficient (normal/deep): 0.640 / 0.645
 Length to Beam Ratio: 5.63 : 1
 'Natural speed' for length: 21.21 kts
 Power going to wave formation at top speed: 46 %
 Trim (Max stability = 0, Max steadiness = 100): 43
 Bow angle (Positive = bow angles forward): 0.00 degrees
 Stern overhang: -2.00 ft / -0.61 m
 Freeboard (% = length of deck as a percentage of waterline length):
    Fore end,  Aft end
    - Forecastle: 20.00 %,  20.00 ft / 6.10 m,  20.00 ft / 6.10 m
    - Forward deck: 45.00 %,  20.00 ft / 6.10 m,  20.00 ft / 6.10 m
    - Aft deck: 20.00 %,  12.00 ft / 3.66 m,  12.00 ft / 3.66 m
    - Quarter deck: 15.00 %,  12.00 ft / 3.66 m,  12.00 ft / 3.66 m
    - Average freeboard:  17.20 ft / 5.24 m
 Ship tends to be wet forward

Ship space, strength and comments:
 Space - Hull below water (magazines/engines, low = better): 88.5 %
  - Above water (accommodation/working, high = better): 120.9 %
 Waterplane Area: 27,326 Square feet or 2,539 Square metres
 Displacement factor (Displacement / loading): 106 %
 Structure weight / hull surface area: 162 lbs/sq ft or 790 Kg/sq metre
 Hull strength (Relative):
  - Cross-sectional: 0.95
  - Longitudinal: 1.72
  - Overall: 1.00
 Hull space for machinery, storage, compartmentation is adequate
 Room for accommodation and workspaces is excellent
 Good seaboat, rides out heavy weather easily

The GB/CL/1941, a 6in gun cruiser

The GB/CL/1941 design worked reasonably well in Springsharp, except that 35 knots was not readily achievable, at least with the specified power. The ship has a 3in armour basis and a 2in deck. The armament is 12-6in/45 QF, 8-4in AA, and 30-40mm AA guns. This is the original pencil drawing:

I have this near-fatal attraction to freehand, pencil drawings. There are tradeoffs, and the curve is due to the lense distortion, as the picture is off-center, due to trying to reduce flash glare. This is the Springsharp 3.0b1 Beta report:

GB/CL/1941, Great Britain Light Cruiser laid down 1941 (Engine 1945)

Displacement:
 10,440 t light; 10,805 t standard; 11,496 t normal; 12,048 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
 (646.22 ft / 640.00 ft) x 64.00 ft x (19.00 / 19.70 ft)
 (196.97 m / 195.07 m) x 19.51 m  x (5.79 / 6.00 m)

Armament:
      12 - 6.00" / 152 mm 45.0 cal guns - 108.92lbs / 49.41kg shells, 150 per gun
   Quick firing guns in turret on barbette mounts , 1941 Model
   4 x Triple mounts on centreline ends, evenly spread
  2 raised mounts - superfiring
      8 - 4.00" / 102 mm 45.0 cal guns - 32.27lbs / 14.64kg shells, 150 per gun
   Anti-air guns in deck and hoist mounts , 1941 Model
   4 x Twin mounts on sides, forward deck aft
  4 raised mounts
      30 - 1.57" / 40.0 mm 45.0 cal guns - 2.00lbs / 0.91kg shells, 150 per gun
   Anti-air guns in deck mounts , 1941 Model
   4 x 2 row sextuple mounts on sides, evenly spread
  4 raised mounts
   1 x 2 row sextuple mount on centreline, aft deck aft
 Weight of broadside 1,625 lbs / 1,625 kg

Armour:
   - Belts:  Width (max) Length (avg)  Height (avg)
 Main: 3.00" / 76 mm 425.00 ft / 129.54 m 12.00 ft / 3.66 m
 Ends: Unarmoured
   Main Belt covers 102 % of normal length
   Main belt does not fully cover magazines and engineering spaces

   - Torpedo Bulkhead:
  0.75" / 19 mm 425.00 ft / 129.54 m 19.00 ft / 5.79 m

   - Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
 Main: 4.00" / 102 mm 2.00" / 51 mm  3.00" / 76 mm
 2nd: 1.00" / 25 mm 1.00" / 25 mm  1.00" / 25 mm
 3rd: 1.00" / 25 mm       -         -

   - Armour deck: 2.00" / 51 mm, Conning tower: 3.00" / 76 mm

Machinery:
 Oil fired boilers, steam turbines, 
 Geared drive, 4 shafts, 115,092 shp / 85,858 Kw = 34.00 kts
 Range 5,400nm at 15.00 kts
 Bunker at max displacement = 1,243 tons

Complement:
 554 - 721

Cost:
 £5.715 million / $22.860 million

Distribution of weights at normal displacement:
 Armament: 370 tons, 3.2 %
 Armour: 2,271 tons, 19.8 %
    - Belts: 635 tons, 5.5 %
    - Torpedo bulkhead: 224 tons, 1.9 %
    - Armament: 353 tons, 3.1 %
    - Armour Deck: 1,026 tons, 8.9 %
    - Conning Tower: 33 tons, 0.3 %
 Machinery: 2,906 tons, 25.3 %
 Hull, fittings & equipment: 5,082 tons, 44.2 %
 Fuel, ammunition & stores: 1,056 tons, 9.2 %
 Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
 Survivability (Non-critical penetrating hits needed to sink ship):
   16,754 lbs / 7,600 Kg = 155.1 x 6.0 " / 152 mm shells or 2.3 torpedoes
 Stability (Unstable if below 1.00): 1.11
 Metacentric height 3.1 ft / 0.9 m
 Roll period: 15.3 seconds
 Steadiness - As gun platform (Average = 50 %): 65 %
   - Recoil effect (Restricted arc if above 1.00): 0.48
 Seaboat quality  (Average = 1.00): 1.31

Hull form characteristics:
 Hull has a flush deck,
   a normal bow and a cruiser stern
 Block coefficient (normal/deep): 0.517 / 0.523
 Length to Beam Ratio: 10.00 : 1
 'Natural speed' for length: 25.30 kts
 Power going to wave formation at top speed: 57 %
 Trim (Max stability = 0, Max steadiness = 100): 50
 Bow angle (Positive = bow angles forward): 8.00 degrees
 Stern overhang: 2.00 ft / 0.61 m
 Freeboard (% = length of deck as a percentage of waterline length):
    Fore end,  Aft end
    - Forecastle: 20.00 %,  30.00 ft / 9.14 m,  26.00 ft / 7.92 m
    - Forward deck: 30.00 %,  26.00 ft / 7.92 m,  23.00 ft / 7.01 m
    - Aft deck: 35.00 %,  23.00 ft / 7.01 m,  23.00 ft / 7.01 m
    - Quarter deck: 15.00 %,  23.00 ft / 7.01 m,  24.00 ft / 7.32 m
    - Average freeboard:  24.45 ft / 7.45 m

Ship space, strength and comments:
 Space - Hull below water (magazines/engines, low = better): 137.9 %
  - Above water (accommodation/working, high = better): 225.8 %
 Waterplane Area: 27,720 Square feet or 2,575 Square metres
 Displacement factor (Displacement / loading): 121 %
 Structure weight / hull surface area: 108 lbs/sq ft or 527 Kg/sq metre
 Hull strength (Relative):
  - Cross-sectional: 0.94
  - Longitudinal: 1.73
  - Overall: 1.00
 Hull space for machinery, storage, compartmentation is cramped
 Room for accommodation and workspaces is excellent
 Good seaboat, rides out heavy weather easily

Ships at sea: a CG, a BB, and a CVN

Black Five has a nice pic of three ships steaming in column: a CG, the Lake Champlain, the BB New Jersey, and the CVN Enterprise.

A nice version of the GB/CB/1941 design

I tried a new version of the GB/CB/1941 design in Springsharp 3.0b1 Beta. The design turned out very well. This is a 31 knot ship that has 9-16in/45, 20-4.5in DP, and 42-40mm AA guns. The armour basis is 12in with a 5in deck. The speed is 31 knots. The ship is somewhat like an updated Hood, with 16in guns. I probably should have some miscellaneous weights, but I am not sure how large they should be, for the aircraft capability. I would welcome some suggestions. This is the photo of the pencil drawing:

This is the Springsharp report:

GB/CB/1941, Great Britain Battlecruiser laid down 1941 (Engine 1945)

Displacement:
 46,658 t light; 49,024 t standard; 52,055 t normal; 54,480 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
 (864.78 ft / 860.00 ft) x 108.00 ft x (32.00 / 33.23 ft)
 (263.58 m / 262.13 m) x 32.92 m  x (9.75 / 10.13 m)

Armament:
      9 - 16.00" / 406 mm 45.0 cal guns - 2,065.46lbs / 936.88kg shells, 120 per gun
   Breech loading guns in turret on barbette mounts , 1941 Model
   3 x Triple mounts on centreline ends, majority forward
  3 raised mounts
      20 - 4.50" / 114 mm 45.0 cal guns - 45.00lbs / 20.41kg shells, 150 per gun
   Dual purpose guns in turret on barbette mounts , 1941 Model
   6 x Twin mounts on sides, forward deck aft
  6 raised mounts
   4 x Twin mounts on sides, aft deck forward
  4 raised mounts
      42 - 1.57" / 40.0 mm 45.0 cal guns - 1.97lbs / 0.89kg shells, 240 per gun
   Anti-air guns in deck and hoist mounts , 1941 Model
   4 x Twin mounts on sides, evenly spread
  4 raised mounts
   3 x Twin mounts on centreline ends, majority aft
  2 raised mounts - superfiring
 Weight of broadside 19,572 lbs / 19,572 kg

Armour:
   - Belts:  Width (max) Length (avg)  Height (avg)
 Main: 12.0" / 305 mm 570.00 ft / 173.74 m 16.00 ft / 4.88 m
 Ends: Unarmoured
   Main Belt covers 102 % of normal length

   - Torpedo Bulkhead:
  2.00" / 51 mm 570.00 ft / 173.74 m 32.00 ft / 9.75 m

   - Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
 Main: 14.0" / 356 mm 8.00" / 203 mm  12.0" / 305 mm
 2nd: 4.00" / 102 mm 3.00" / 76 mm  4.00" / 102 mm

   - Armour deck: 5.00" / 127 mm, Conning tower: 12.00" / 305 mm

Machinery:
 Oil fired boilers, steam turbines, 
 Geared drive, 4 shafts, 193,176 shp / 144,109 Kw = 31.00 kts
 Range 9,600nm at 15.00 kts
 Bunker at max displacement = 5,455 tons

Complement:
 1,723 - 2,240

Cost:
 £25.636 million / $102.545 million

Distribution of weights at normal displacement:
 Armament: 3,267 tons, 6.3 %
 Armour: 17,270 tons, 33.2 %
    - Belts: 4,663 tons, 9.0 %
    - Torpedo bulkhead: 1,350 tons, 2.6 %
    - Armament: 4,536 tons, 8.7 %
    - Armour Deck: 6,360 tons, 12.2 %
    - Conning Tower: 360 tons, 0.7 %
 Machinery: 4,878 tons, 9.4 %
 Hull, fittings & equipment: 22,330 tons, 42.9 %
 Fuel, ammunition & stores: 5,397 tons, 10.4 %
 Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
 Survivability (Non-critical penetrating hits needed to sink ship):
   85,333 lbs / 38,706 Kg = 41.7 x 16.0 " / 406 mm shells or 13.2 torpedoes
 Stability (Unstable if below 1.00): 1.06
 Metacentric height 6.3 ft / 1.9 m
 Roll period: 18.1 seconds
 Steadiness - As gun platform (Average = 50 %): 54 %
   - Recoil effect (Restricted arc if above 1.00): 0.91
 Seaboat quality  (Average = 1.00): 1.20

Hull form characteristics:
 Hull has a flush deck,
   a normal bow and a cruiser stern
 Block coefficient (normal/deep): 0.613 / 0.618
 Length to Beam Ratio: 7.96 : 1
 'Natural speed' for length: 29.33 kts
 Power going to wave formation at top speed: 52 %
 Trim (Max stability = 0, Max steadiness = 100): 45
 Bow angle (Positive = bow angles forward): 8.00 degrees
 Stern overhang: 0.00 ft / 0.00 m
 Freeboard (% = length of deck as a percentage of waterline length):
    Fore end,  Aft end
    - Forecastle: 20.00 %,  34.00 ft / 10.36 m,  30.00 ft / 9.14 m
    - Forward deck: 30.00 %,  30.00 ft / 9.14 m,  26.00 ft / 7.92 m
    - Aft deck: 35.00 %,  26.00 ft / 7.92 m,  26.00 ft / 7.92 m
    - Quarter deck: 15.00 %,  26.00 ft / 7.92 m,  26.00 ft / 7.92 m
    - Average freeboard:  27.72 ft / 8.45 m

Ship space, strength and comments:
 Space - Hull below water (magazines/engines, low = better): 77.6 %
  - Above water (accommodation/working, high = better): 204.7 %
 Waterplane Area: 68,759 Square feet or 6,388 Square metres
 Displacement factor (Displacement / loading): 117 %
 Structure weight / hull surface area: 227 lbs/sq ft or 1,109 Kg/sq metre
 Hull strength (Relative):
  - Cross-sectional: 0.97
  - Longitudinal: 1.32
  - Overall: 1.00
 Hull space for machinery, storage, compartmentation is excellent
 Room for accommodation and workspaces is excellent
 Good seaboat, rides out heavy weather easily

An anachronistic Minotaur design

I had an anachronistic drawing of a Minotaur armoured cruiser, dating the the 1980's that I decided to do in Springsharp 3.0b1 Beta. This is a photograph of the pencil drawing:

The design works reasonably well in Springsharp. Probably, if had used turbines and oil fuel, it would have been very good. I may try that, yet. The ship has 4-9.2in/50, 10-7.5in/50, and 16-12pdr QF guns. The armour basis is 6in. The displacement is a bit high, but other wise, the ship is reasonably good. Of course, the machinery is light, although the boilers are coal-fired and the machinery is reciprocating. This is the Springsharp report:

Minotaur class, anchronistic, Great Britain Armoured Cruiser laid down 1908 (Engine 1912)

Displacement:
 13,162 t light; 13,784 t standard; 15,600 t normal; 17,053 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
 (526.43 ft / 520.00 ft) x 75.00 ft x (25.00 / 26.85 ft)
 (160.46 m / 158.50 m) x 22.86 m  x (7.62 / 8.18 m)

Armament:
      4 - 9.20" / 234 mm 50.0 cal guns - 380.00lbs / 172.37kg shells, 150 per gun
   Breech loading guns in turret on barbette mounts , 1908 Model
   2 x Twin mounts on centreline ends, evenly spread
      10 - 7.50" / 191 mm 50.0 cal guns - 200.00lbs / 90.72kg shells, 150 per gun
   Breech loading guns in turret on barbette mounts , 1908 Model
   2 x Triple mounts on centreline ends, evenly spread
  2 raised mounts - superfiring
   2 x Twin mounts on sides, forward deck aft
      16 - 3.00" / 76.2 mm 45.0 cal guns - 12.00lbs / 5.44kg shells, 150 per gun
   Quick firing guns in deck and hoist mounts , 1908 Model
   4 x Twin mounts on sides, forward deck aft
  4 raised mounts
   4 x Twin mounts on sides, aft deck forward
  4 raised mounts
 Weight of broadside 3,712 lbs / 3,712 kg

Armour:
   - Belts:  Width (max) Length (avg)  Height (avg)
 Main: 6.00" / 152 mm 330.00 ft / 100.58 m 16.00 ft / 4.88 m
 Ends: 4.00" / 102 mm 190.00 ft / 57.91 m 16.00 ft / 4.88 m
   Main Belt covers 98 % of normal length
   Main belt does not fully cover magazines and engineering spaces

   - Torpedo Bulkhead:
  1.00" / 25 mm 330.00 ft / 100.58 m 25.00 ft / 7.62 m

   - Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
 Main: 6.00" / 152 mm 4.00" / 102 mm  6.00" / 152 mm
 2nd: 5.00" / 127 mm 4.00" / 102 mm  5.00" / 127 mm
 3rd: 3.00" / 76 mm 1.00" / 25 mm  3.00" / 76 mm

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

Machinery:
 Coal fired boilers, complex reciprocating steam engines, 
 Direct drive, 2 shafts, 39,750 ihp / 29,653 Kw = 24.00 kts
 Range 4,800nm at 15.00 kts
 Bunker at max displacement = 3,269 tons (100% coal)

Complement:
 697 - 907

Cost:
 £1.256 million / $5.022 million

Distribution of weights at normal displacement:
 Armament: 1,017 tons, 6.5 %
 Armour: 4,305 tons, 27.6 %
    - Belts: 1,828 tons, 11.7 %
    - Torpedo bulkhead: 305 tons, 2.0 %
    - Armament: 1,075 tons, 6.9 %
    - Armour Deck: 1,017 tons, 6.5 %
    - Conning Tower: 81 tons, 0.5 %
 Machinery: 2,632 tons, 16.9 %
 Hull, fittings & equipment: 5,718 tons, 36.7 %
 Fuel, ammunition & stores: 2,438 tons, 15.6 %
 Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
 Survivability (Non-critical penetrating hits needed to sink ship):
   22,306 lbs / 10,118 Kg = 57.3 x 9.2 " / 234 mm shells or 3.3 torpedoes
 Stability (Unstable if below 1.00): 1.15
 Metacentric height 4.2 ft / 1.3 m
 Roll period: 15.4 seconds
 Steadiness - As gun platform (Average = 50 %): 75 %
   - Recoil effect (Restricted arc if above 1.00): 0.60
 Seaboat quality  (Average = 1.00): 1.50

Hull form characteristics:
 Hull has a flush deck,
   a normal bow and a cruiser stern
 Block coefficient (normal/deep): 0.560 / 0.570
 Length to Beam Ratio: 6.93 : 1
 'Natural speed' for length: 22.80 kts
 Power going to wave formation at top speed: 52 %
 Trim (Max stability = 0, Max steadiness = 100): 50
 Bow angle (Positive = bow angles forward): 9.00 degrees
 Stern overhang: 2.00 ft / 0.61 m
 Freeboard (% = length of deck as a percentage of waterline length):
    Fore end,  Aft end
    - Forecastle: 20.00 %,  28.00 ft / 8.53 m,  25.00 ft / 7.62 m
    - Forward deck: 30.00 %,  25.00 ft / 7.62 m,  22.00 ft / 6.71 m
    - Aft deck: 35.00 %,  22.00 ft / 6.71 m,  22.00 ft / 6.71 m
    - Quarter deck: 15.00 %,  22.00 ft / 6.71 m,  23.00 ft / 7.01 m
    - Average freeboard:  23.37 ft / 7.12 m

Ship space, strength and comments:
 Space - Hull below water (magazines/engines, low = better): 109.4 %
  - Above water (accommodation/working, high = better): 170.4 %
 Waterplane Area: 27,474 Square feet or 2,552 Square metres
 Displacement factor (Displacement / loading): 114 %
 Structure weight / hull surface area: 134 lbs/sq ft or 653 Kg/sq metre
 Hull strength (Relative):
  - Cross-sectional: 0.93
  - Longitudinal: 1.97
  - Overall: 1.00
 Hull space for machinery, storage, compartmentation is adequate
 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

A new Ideal Battleship design

I have changed my mind about one aspect of Colonel Cuniberti's Ideal Battleship design. If built, they would have had turbine machinery, not reciprocating. They also would have been started about the date that construction of the Dreadnought commenced. The one other aspect that I was not able to reproduce is that to achieve adequate characteristics, the displacement has to be much larger than 17,000 tons. The dimensions were retained: 521-1/2ft x 82ft x 27-1/2ft. The armament is the original 12-12in, but 40 caliber, not 45 caliber. The secondary armament is the 12-12pdr QF guns in casemates, with 6-47mm 3pdr pom-poms. There is the amazing 12in complete belt and 24 knot speed. I have assumed that the machinery would have to have been very light, and therefore, a possible weakness, rather than the usual heavy and robust machinery usually specified. This is the Springsharp 3.0b1 Beta report:

Ideal Battleship, Great Britain Battleship laid down 1905 (Engine 1912)

Displacement:
 18,945 t light; 19,960 t standard; 20,832 t normal; 21,529 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
 (533.50 ft / 521.50 ft) x 82.00 ft x (27.50 / 28.27 ft)
 (162.61 m / 158.95 m) x 24.99 m  x (8.38 / 8.62 m)

Armament:
      8 - 12.00" / 305 mm 40.0 cal guns - 850.00lbs / 385.55kg shells, 80 per gun
   Breech loading guns in turret on barbette mounts , 1905 Model
   2 x Twin mounts on centreline ends, evenly spread
   2 x Twin mounts on sides, forward deck aft
  2 raised mounts
      4 - 12.00" / 305 mm 40.0 cal guns - 850.00lbs / 385.55kg shells, 150 per gun
   Breech loading guns in turret on barbette mounts , 1905 Model
   2 x Single mounts on sides, forward evenly spread
   2 x Single mounts on sides, aft deck forward
      12 - 3.00" / 76.2 mm 45.0 cal guns - 12.00lbs / 5.44kg shells, 150 per gun
   Quick firing guns in casemate mounts , 1905 Model
   12 x Single mounts on sides, forward deck aft
      6 - 1.85" / 47.0 mm 45.0 cal guns - 3.00lbs / 1.36kg shells, 150 per gun
   Quick firing guns in deck mounts , 1905 Model
   6 x Single mounts on sides, evenly spread
  6 raised mounts
 Weight of broadside 10,362 lbs / 10,362 kg

Armour:
   - Belts:  Width (max) Length (avg)  Height (avg)
 Main: 12.0" / 305 mm 350.00 ft / 106.68 m 8.00 ft / 2.44 m
 Ends: 12.0" / 305 mm 171.50 ft / 52.27 m 8.00 ft / 2.44 m
 Upper: 12.0" / 305 mm 280.00 ft / 85.34 m 8.00 ft / 2.44 m
   Main Belt covers 103 % of normal length

   - Torpedo Bulkhead:
  1.00" / 25 mm 350.00 ft / 106.68 m 27.50 ft / 8.38 m

   - Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
 Main: 12.0" / 305 mm 7.00" / 178 mm  12.0" / 305 mm
 2nd: 12.0" / 305 mm 7.00" / 178 mm  12.0" / 305 mm
 3rd: 4.00" / 102 mm 3.00" / 76 mm  4.00" / 102 mm

   - Armour deck: 2.00" / 51 mm, Conning tower: 12.00" / 305 mm

Machinery:
 Coal and oil fired boilers, steam turbines, 
 ERROR: Revise drives, 4 shafts, 49,144 shp / 36,662 Kw = 24.00 kts
 Range 4,500nm at 12.00 kts
 Bunker at max displacement = 1,569 tons

Complement:
 866 - 1,127

Cost:
 £1.771 million / $7.085 million

Distribution of weights at normal displacement:
 Armament: 1,725 tons, 8.3 %
 Armour: 8,006 tons, 38.4 %
    - Belts: 3,304 tons, 15.9 %
    - Torpedo bulkhead: 356 tons, 1.7 %
    - Armament: 2,971 tons, 14.3 %
    - Armour Deck: 1,179 tons, 5.7 %
    - Conning Tower: 196 tons, 0.9 %
 Machinery: 1,960 tons, 9.4 %
 Hull, fittings & equipment: 7,987 tons, 38.3 %
 Fuel, ammunition & stores: 1,887 tons, 9.1 %
 Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
 Survivability (Non-critical penetrating hits needed to sink ship):
   28,458 lbs / 12,908 Kg = 32.9 x 12.0 " / 305 mm shells or 4.7 torpedoes
 Stability (Unstable if below 1.00): 1.02
 Metacentric height 3.9 ft / 1.2 m
 Roll period: 17.5 seconds
 Steadiness - As gun platform (Average = 50 %): 51 %
   - Recoil effect (Restricted arc if above 1.00): 0.89
 Seaboat quality  (Average = 1.00): 1.04

Hull form characteristics:
 Hull has raised forecastle,
   a ram bow and a cruiser stern
 Block coefficient (normal/deep): 0.620 / 0.623
 Length to Beam Ratio: 6.36 : 1
 'Natural speed' for length: 22.84 kts
 Power going to wave formation at top speed: 55 %
 Trim (Max stability = 0, Max steadiness = 100): 49
 Bow angle (Positive = bow angles forward): -2.00 degrees
 Stern overhang: 4.00 ft / 1.22 m
 Freeboard (% = length of deck as a percentage of waterline length):
    Fore end,  Aft end
    - Forecastle: 15.00 %,  27.00 ft / 8.23 m,  27.00 ft / 8.23 m
    - Forward deck: 30.00 %,  19.00 ft / 5.79 m,  19.00 ft / 5.79 m
    - Aft deck: 40.00 %,  19.00 ft / 5.79 m,  19.00 ft / 5.79 m
    - Quarter deck: 15.00 %,  19.00 ft / 5.79 m,  19.00 ft / 5.79 m
    - Average freeboard:  20.20 ft / 6.16 m

Ship space, strength and comments:
 Space - Hull below water (magazines/engines, low = better): 89.5 %
  - Above water (accommodation/working, high = better): 133.2 %
 Waterplane Area: 31,864 Square feet or 2,960 Square metres
 Displacement factor (Displacement / loading): 105 %
 Structure weight / hull surface area: 172 lbs/sq ft or 841 Kg/sq metre
 Hull strength (Relative):
  - Cross-sectional: 0.93
  - Longitudinal: 1.82
  - Overall: 1.00
 Hull space for machinery, storage, compartmentation is adequate
 Room for accommodation and workspaces is excellent

Another attempt at a photo of Colonel Cunibert's "Ideal Battleship"

I keep trying to improve my photo of Colonel Cuniberti's "Ideal Battleship for the British Fleet" from the 1903 Jane's All the World's Fighting Ships. This is my latest attempt. I will probably see if I can do a better Springsharp design than I could with the earlier version of Springsharp.

Speaking of fast ships: the Capitani Romani class

Frank Fox has told me that he now believes that the Italians treated the high-speed run of the Capitani Romani class light cruisers as a trial, and may have lightened the ships, so that the extreme speed (43 knots?) was possible and achieved.

A extremely fast ship: GB/CB/1921

I apologize for beating on the large, fast ship topic so hard, but what I have today explores the outer limits of what is possible. I actually suspect that even faster is possible. This is a 42-knot design, with the lightest machinery, that has an 8in armour basis and 6-14in/50, 16-5.5in QF, 6-4.7in AA, and 32-40mm AA guns. The freeboard is quite high and the displacement was reduced. I was pleasantly surprised that the protection and machinery size are as good as they are. This is the Springsharp 3.0b1 Beta report:

GB/CB/1921, Great Britain Battlecruiser laid down 1921 (Engine 1950)

Displacement:
 45,537 t light; 47,389 t standard; 49,064 t normal; 50,405 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
 (929.48 ft / 924.00 ft) x 118.00 ft x (35.00 / 35.65 ft)
 (283.31 m / 281.64 m) x 35.97 m  x (10.67 / 10.87 m)

Armament:
      6 - 14.00" / 356 mm 50.0 cal guns - 1,452.00lbs / 658.62kg shells, 150 per gun
   Breech loading guns in turret on barbette mounts , 1921 Model
   2 x Triple mounts on centreline, forward evenly spread
  1 raised mount
      16 - 5.50" / 140 mm 45.0 cal guns - 85.00lbs / 38.56kg shells, 150 per gun
   Quick firing guns in turret on barbette mounts , 1921 Model
   8 x Twin mounts on sides, evenly spread
  4 raised mounts
      6 - 4.70" / 119 mm 45.0 cal guns - 52.35lbs / 23.75kg shells, 150 per gun
   Anti-air guns in deck and hoist mounts , 1921 Model
   6 x Single mounts on sides, aft deck forward
  6 raised mounts
      32 - 1.57" / 40.0 mm 45.0 cal guns - 2.00lbs / 0.91kg shells, 150 per gun
   Anti-air guns in deck mounts , 1921 Model
   8 x 4 row quad mounts on sides, evenly spread
  6 raised mounts
 Weight of broadside 10,450 lbs / 10,450 kg

Armour:
   - Belts:  Width (max) Length (avg)  Height (avg)
 Main: 8.00" / 203 mm 570.00 ft / 173.74 m 16.00 ft / 4.88 m
 Ends: Unarmoured
   Main Belt covers 95 % of normal length
   Main belt does not fully cover magazines and engineering spaces

   - Torpedo Bulkhead:
  2.00" / 51 mm 570.00 ft / 173.74 m 35.00 ft / 10.67 m

   - Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
 Main: 8.00" / 203 mm 5.00" / 127 mm  8.00" / 203 mm
 2nd: 4.00" / 102 mm 4.00" / 102 mm  4.00" / 102 mm

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

Machinery:
 Oil fired boilers, steam turbines, 
 Geared drive, 8 shafts, 476,598 shp / 355,542 Kw = 42.00 kts
 Range 5,600nm at 15.00 kts
 Bunker at max displacement = 3,015 tons

Complement:
 1,647 - 2,142

Cost:
 £10.829 million / $43.317 million

Distribution of weights at normal displacement:
 Armament: 2,054 tons, 4.2 %
 Armour: 11,064 tons, 22.5 %
    - Belts: 3,125 tons, 6.4 %
    - Torpedo bulkhead: 1,476 tons, 3.0 %
    - Armament: 2,222 tons, 4.5 %
    - Armour Deck: 4,010 tons, 8.2 %
    - Conning Tower: 231 tons, 0.5 %
 Machinery: 11,402 tons, 23.2 %
 Hull, fittings & equipment: 21,804 tons, 44.4 %
 Fuel, ammunition & stores: 3,527 tons, 7.2 %
 Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
 Survivability (Non-critical penetrating hits needed to sink ship):
   67,884 lbs / 30,792 Kg = 49.5 x 14.0 " / 356 mm shells or 8.2 torpedoes
 Stability (Unstable if below 1.00): 1.22
 Metacentric height 9.3 ft / 2.8 m
 Roll period: 16.3 seconds
 Steadiness - As gun platform (Average = 50 %): 51 %
   - Recoil effect (Restricted arc if above 1.00): 0.34
 Seaboat quality  (Average = 1.00): 1.02

Hull form characteristics:
 Hull has raised forecastle, rise forward of midbreak,
   a normal bow and large transom stern
 Block coefficient (normal/deep): 0.450 / 0.454
 Length to Beam Ratio: 7.83 : 1
 'Natural speed' for length: 35.64 kts
 Power going to wave formation at top speed: 61 %
 Trim (Max stability = 0, Max steadiness = 100): 50
 Bow angle (Positive = bow angles forward): 8.00 degrees
 Stern overhang: 0.00 ft / 0.00 m
 Freeboard (% = length of deck as a percentage of waterline length):
    Fore end,  Aft end
    - Forecastle: 20.00 %,  39.00 ft / 11.89 m,  34.00 ft / 10.36 m
    - Forward deck: 30.00 %,  33.00 ft / 10.06 m,  34.00 ft / 10.36 m
    - Aft deck: 35.00 %,  33.00 ft / 10.06 m,  33.00 ft / 10.06 m
    - Quarter deck: 15.00 %,  33.00 ft / 10.06 m,  34.00 ft / 10.36 m
    - Average freeboard:  33.83 ft / 10.31 m

Ship space, strength and comments:
 Space - Hull below water (magazines/engines, low = better): 115.3 %
  - Above water (accommodation/working, high = better): 277.6 %
 Waterplane Area: 72,244 Square feet or 6,712 Square metres
 Displacement factor (Displacement / loading): 112 %
 Structure weight / hull surface area: 205 lbs/sq ft or 999 Kg/sq metre
 Hull strength (Relative):
  - Cross-sectional: 0.93
  - Longitudinal: 1.83
  - Overall: 1.00
 Hull space for machinery, storage, compartmentation is cramped
 Room for accommodation and workspaces is excellent

Near the limits of what is possible: a 40-knot GB/CB/1905

This is probably not a desirable thing to do, but I had wondered what was possible with the GB/CB/1905 design. It may be that by increasing the freeboard, I might have gotten another knot or two from the ship, but settled for 40 knots. I implemented various weight-saving measures and went to six shafts. Six shafts on a ship with an 85ft beam is not very practical, to say the least. The power plant must use the lightest machinery possible, and really, this is an anachronistic design, as it seems necessary to use geared turbines before their time, to satisfy Springsharp 3.0b1 Beta. Yesterday's design is probably more like what is practically achievable with acceptable protection (if you don't mind a 4in belt, at least). This is an older photo of a ship of the class:

By clicking on the image, you can pop the larger version of the photo. This is the Springsharp report:

GB/CB/1905 very extreme, Great Britain Battlecruiser laid down 1905 (Engine 1950)

Displacement:
 21,902 t light; 22,620 t standard; 23,667 t normal; 24,504 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
 (778.00 ft / 770.00 ft) x 85.00 ft x (28.00 / 28.70 ft)
 (237.13 m / 234.70 m) x 25.91 m  x (8.53 / 8.75 m)

Armament:
      4 - 12.00" / 305 mm 45.0 cal guns - 850.00lbs / 385.55kg shells, 90 per gun
   Breech loading guns in turret on barbette mounts , 1905 Model
   2 x Twin mounts on centreline ends, evenly spread
      9 - 6.00" / 152 mm 50.0 cal guns - 100.00lbs / 45.36kg shells, 150 per gun
   Quick firing guns in deck and hoist mounts , 1905 Model
   8 x Single mounts on sides, evenly spread
   1 x Single mount on centreline, aft evenly spread
 Weight of broadside 4,300 lbs / 4,300 kg

Armour:
   - Belts:  Width (max) Length (avg)  Height (avg)
 Main: 4.00" / 102 mm 410.00 ft / 124.97 m 12.00 ft / 3.66 m
 Ends: Unarmoured
   Main Belt covers 82 % of normal length
   Main belt does not fully cover magazines and engineering spaces

   - Torpedo Bulkhead:
  1.00" / 25 mm 410.00 ft / 124.97 m 28.00 ft / 8.53 m

   - Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
 Main: 4.00" / 102 mm 3.00" / 76 mm  4.00" / 102 mm
 2nd: 3.00" / 76 mm 1.00" / 25 mm  3.00" / 76 mm

   - Armour deck: 2.00" / 51 mm, Conning tower: 4.00" / 102 mm

Machinery:
 Oil fired boilers, steam turbines, 
 Geared drive, 6 shafts, 316,443 shp / 236,066 Kw = 40.00 kts
 Range 5,400nm at 15.00 kts
 Bunker at max displacement = 1,883 tons

Complement:
 953 - 1,240

Cost:
 £2.260 million / $9.039 million

Distribution of weights at normal displacement:
 Armament: 923 tons, 3.9 %
 Armour: 3,389 tons, 14.3 %
    - Belts: 854 tons, 3.6 %
    - Torpedo bulkhead: 425 tons, 1.8 %
    - Armament: 492 tons, 2.1 %
    - Armour Deck: 1,547 tons, 6.5 %
    - Conning Tower: 71 tons, 0.3 %
 Machinery: 7,570 tons, 32.0 %
 Hull, fittings & equipment: 10,427 tons, 44.1 %
 Fuel, ammunition & stores: 1,765 tons, 7.5 %
 Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
 Survivability (Non-critical penetrating hits needed to sink ship):
   22,968 lbs / 10,418 Kg = 26.6 x 12.0 " / 305 mm shells or 2.6 torpedoes
 Stability (Unstable if below 1.00): 1.21
 Metacentric height 5.6 ft / 1.7 m
 Roll period: 15.1 seconds
 Steadiness - As gun platform (Average = 50 %): 53 %
   - Recoil effect (Restricted arc if above 1.00): 0.39
 Seaboat quality  (Average = 1.00): 1.01

Hull form characteristics:
 Hull has low quarterdeck ,
   a ram bow and a cruiser stern
 Block coefficient (normal/deep): 0.452 / 0.457
 Length to Beam Ratio: 9.06 : 1
 'Natural speed' for length: 27.75 kts
 Power going to wave formation at top speed: 61 %
 Trim (Max stability = 0, Max steadiness = 100): 52
 Bow angle (Positive = bow angles forward): -2.00 degrees
 Stern overhang: 0.00 ft / 0.00 m
 Freeboard (% = length of deck as a percentage of waterline length):
    Fore end,  Aft end
    - Forecastle: 20.00 %,  34.00 ft / 10.36 m,  32.00 ft / 9.75 m
    - Forward deck: 30.00 %,  32.00 ft / 9.75 m,  30.00 ft / 9.14 m
    - Aft deck: 20.00 %,  30.00 ft / 9.14 m,  30.00 ft / 9.14 m
    - Quarter deck: 30.00 %,  22.00 ft / 6.71 m,  23.00 ft / 7.01 m
    - Average freeboard:  28.61 ft / 8.72 m

Ship space, strength and comments:
 Space - Hull below water (magazines/engines, low = better): 157.1 %
  - Above water (accommodation/working, high = better): 255.8 %
 Waterplane Area: 41,817 Square feet or 3,885 Square metres
 Displacement factor (Displacement / loading): 104 %
 Structure weight / hull surface area: 153 lbs/sq ft or 748 Kg/sq metre
 Hull strength (Relative):
  - Cross-sectional: 0.94
  - Longitudinal: 1.80
  - Overall: 1.00
 Hull space for machinery, storage, compartmentation is cramped
 Room for accommodation and workspaces is excellent

An extreme sports GB/CB/1905 battlecruiser

Since I can run Springsharp 3.0b1 Beta here at lunch, I thought that I would see just how much speed I could achieve, through really radical measures. The answer is 38.5 knots is what is achievable, doing what I just did. The design is very extreme, as I use very lightweight machinery. To optimize power and strength, I lowered the displacement considerably, so that there is no excess weight going into the hull. As you may recall, this is the best photo:

We could probably achieve some monster speed by allowing for more than four shafts and raising total power about 300,000 SHP. In any case, to not have an error, Springsharp required me to use geared turbines, which is not very likely in real life. Of course, the whole idea of a ship like this would never have been accepted. This is the Springsharp report:

GB/CB/1905 extreme, Great Britain Battlecruiser laid down 1905 (Engine 1941)

Displacement:
 22,731 t light; 23,472 t standard; 24,838 t normal; 25,931 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
 (778.00 ft / 770.00 ft) x 85.00 ft x (27.50 / 28.39 ft)
 (237.13 m / 234.70 m) x 25.91 m  x (8.38 / 8.65 m)

Armament:
      4 - 12.00" / 305 mm 45.0 cal guns - 850.00lbs / 385.55kg shells, 90 per gun
   Breech loading guns in turret on barbette mounts , 1905 Model
   2 x Twin mounts on centreline ends, evenly spread
      9 - 6.00" / 152 mm 50.0 cal guns - 100.00lbs / 45.36kg shells, 150 per gun
   Quick firing guns in deck and hoist mounts , 1905 Model
   8 x Single mounts on sides, evenly spread
   1 x Single mount on centreline, aft evenly spread
 Weight of broadside 4,300 lbs / 4,300 kg

Armour:
   - Belts:  Width (max) Length (avg)  Height (avg)
 Main: 4.00" / 102 mm 420.00 ft / 128.02 m 16.00 ft / 4.88 m
 Ends: Unarmoured
   Main Belt covers 84 % of normal length
   Main belt does not fully cover magazines and engineering spaces

   - Torpedo Bulkhead:
  1.50" / 38 mm 420.00 ft / 128.02 m 27.50 ft / 8.38 m

   - Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
 Main: 6.00" / 152 mm 4.00" / 102 mm  6.00" / 152 mm
 2nd: 4.00" / 102 mm 2.00" / 51 mm  4.00" / 102 mm

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

Machinery:
 Oil fired boilers, steam turbines, 
 Geared drive, 4 shafts, 283,267 shp / 211,317 Kw = 38.50 kts
 Range 6,500nm at 15.00 kts
 Bunker at max displacement = 2,458 tons

Complement:
 989 - 1,286

Cost:
 £2.277 million / $9.108 million

Distribution of weights at normal displacement:
 Armament: 923 tons, 3.7 %
 Armour: 4,252 tons, 17.1 %
    - Belts: 1,163 tons, 4.7 %
    - Torpedo bulkhead: 641 tons, 2.6 %
    - Armament: 750 tons, 3.0 %
    - Armour Deck: 1,589 tons, 6.4 %
    - Conning Tower: 110 tons, 0.4 %
 Machinery: 7,486 tons, 30.1 %
 Hull, fittings & equipment: 10,477 tons, 42.2 %
 Fuel, ammunition & stores: 2,108 tons, 8.5 %
 Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
 Survivability (Non-critical penetrating hits needed to sink ship):
   26,479 lbs / 12,011 Kg = 30.6 x 12.0 " / 305 mm shells or 3.0 torpedoes
 Stability (Unstable if below 1.00): 1.20
 Metacentric height 5.5 ft / 1.7 m
 Roll period: 15.3 seconds
 Steadiness - As gun platform (Average = 50 %): 56 %
   - Recoil effect (Restricted arc if above 1.00): 0.40
 Seaboat quality  (Average = 1.00): 1.05

Hull form characteristics:
 Hull has low quarterdeck ,
   a ram bow and a cruiser stern
 Block coefficient (normal/deep): 0.483 / 0.488
 Length to Beam Ratio: 9.06 : 1
 'Natural speed' for length: 27.75 kts
 Power going to wave formation at top speed: 60 %
 Trim (Max stability = 0, Max steadiness = 100): 53
 Bow angle (Positive = bow angles forward): -2.00 degrees
 Stern overhang: 0.00 ft / 0.00 m
 Freeboard (% = length of deck as a percentage of waterline length):
    Fore end,  Aft end
    - Forecastle: 20.00 %,  34.00 ft / 10.36 m,  32.00 ft / 9.75 m
    - Forward deck: 30.00 %,  32.00 ft / 9.75 m,  30.00 ft / 9.14 m
    - Aft deck: 20.00 %,  30.00 ft / 9.14 m,  30.00 ft / 9.14 m
    - Quarter deck: 30.00 %,  22.00 ft / 6.71 m,  23.00 ft / 7.01 m
    - Average freeboard:  28.61 ft / 8.72 m

Ship space, strength and comments:
 Space - Hull below water (magazines/engines, low = better): 148.4 %
  - Above water (accommodation/working, high = better): 253.1 %
 Waterplane Area: 42,946 Square feet or 3,990 Square metres
 Displacement factor (Displacement / loading): 106 %
 Structure weight / hull surface area: 151 lbs/sq ft or 739 Kg/sq metre
 Hull strength (Relative):
  - Cross-sectional: 0.94
  - Longitudinal: 1.67
  - Overall: 1.00
 Hull space for machinery, storage, compartmentation is cramped
 Room for accommodation and workspaces is excellent

waddya know? I can run Springsharp 3.0b1 Beta at work, after all

Because Springsharp 3.0b1 Beta doesn't have to be installed, and therefore doesn't mess with the registry, I can run it at work! I have a little project for lunchtime...

Speed and protection

I have some of my photographs on my cube walls at work. My latest GB/CB/1905 photo is prominently placed:

The two main criticisms of the design, by several prominent authors, have been that the ship needed to have eight guns, so that it could fire alternate four gun salvos, as was the British practice. The other is that the belt is too thin, at four inches. One author is prepared to sacrifice speed to achieve better protection while another told me that 6in would be adequate to protect against splinters. He would have an armament of 8-12in/45 guns and a 6in belt. He also told me that Sir Philip Watts would have approved of my design.

(notice the date on the drawing)

My anachronistic Hood design

My latest design, an anchronistic Hood, is based on a new quick-and-dirty pencil sketch:

The superfiring turret is twin while the others are triple. This is the Springsharp report:

Hood, anachronistic, Great Britain Battlecruiser laid down 1918 (Engine 1923)

Displacement:
 39,971 t light; 41,702 t standard; 44,036 t normal; 45,903 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
 (861.23 ft / 855.00 ft) x 105.00 ft x (29.00 / 30.00 ft)
 (262.50 m / 260.60 m) x 32.00 m  x (8.84 / 9.14 m)

Armament:
      9 - 15.00" / 381 mm 42.0 cal guns - 1,636.38lbs / 742.25kg shells, 90 per gun
   Breech loading guns in turret on barbette mounts , 1918 Model
   2 x Triple mounts on centreline, forward evenly spread
   1 x Twin mount on centreline, forward evenly spread
  1 raised mount
      16 - 5.50" / 140 mm 50.0 cal guns - 85.00lbs / 38.56kg shells, 150 per gun
   Quick firing guns in turret on barbette mounts , 1918 Model
   8 x Twin mounts on sides, forward deck aft
  8 raised mounts
 Weight of broadside 16,087 lbs / 16,087 kg

Armour:
   - Belts:  Width (max) Length (avg)  Height (avg)
 Main: 12.0" / 305 mm 425.00 ft / 129.54 m 8.00 ft / 2.44 m
 Ends: 4.00" / 102 mm 430.00 ft / 131.06 m 16.00 ft / 4.88 m
 Upper: 8.00" / 203 mm 425.00 ft / 129.54 m 8.00 ft / 2.44 m
   Main Belt covers 76 % of normal length
   Main belt does not fully cover magazines and engineering spaces

   - Torpedo Bulkhead:
  2.00" / 51 mm 425.00 ft / 129.54 m 29.00 ft / 8.84 m

   - Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
 Main: 13.0" / 330 mm 9.00" / 229 mm  13.0" / 330 mm
 2nd: 5.00" / 127 mm 4.00" / 102 mm  5.00" / 127 mm

   - Armour deck: 4.00" / 102 mm, Conning tower: 13.00" / 330 mm

Machinery:
 Oil fired boilers, steam turbines, 
 Geared drive, 4 shafts, 173,386 shp / 129,346 Kw = 31.00 kts
 Range 6,500nm at 15.00 kts
 Bunker at max displacement = 4,202 tons

Complement:
 1,519 - 1,975

Cost:
 £7.280 million / $29.122 million

Distribution of weights at normal displacement:
 Armament: 2,640 tons, 6.0 %
 Armour: 14,096 tons, 32.0 %
    - Belts: 4,072 tons, 9.2 %
    - Torpedo bulkhead: 912 tons, 2.1 %
    - Armament: 3,940 tons, 8.9 %
    - Armour Deck: 4,823 tons, 11.0 %
    - Conning Tower: 349 tons, 0.8 %
 Machinery: 5,795 tons, 13.2 %
 Hull, fittings & equipment: 18,378 tons, 41.7 %
 Fuel, ammunition & stores: 4,065 tons, 9.2 %
 Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
 Survivability (Non-critical penetrating hits needed to sink ship):
   65,791 lbs / 29,842 Kg = 39.0 x 15.0 " / 381 mm shells or 9.1 torpedoes
 Stability (Unstable if below 1.00): 1.12
 Metacentric height 6.7 ft / 2.0 m
 Roll period: 17.0 seconds
 Steadiness - As gun platform (Average = 50 %): 58 %
   - Recoil effect (Restricted arc if above 1.00): 0.65
 Seaboat quality  (Average = 1.00): 1.16

Hull form characteristics:
 Hull has a flush deck,
   a normal bow and a cruiser stern
 Block coefficient (normal/deep): 0.592 / 0.596
 Length to Beam Ratio: 8.14 : 1
 'Natural speed' for length: 29.24 kts
 Power going to wave formation at top speed: 50 %
 Trim (Max stability = 0, Max steadiness = 100): 50
 Bow angle (Positive = bow angles forward): 9.00 degrees
 Stern overhang: 1.00 ft / 0.30 m
 Freeboard (% = length of deck as a percentage of waterline length):
    Fore end,  Aft end
    - Forecastle: 20.00 %,  33.00 ft / 10.06 m,  27.00 ft / 8.23 m
    - Forward deck: 30.00 %,  27.00 ft / 8.23 m,  24.00 ft / 7.32 m
    - Aft deck: 35.00 %,  24.00 ft / 7.32 m,  24.00 ft / 7.32 m
    - Quarter deck: 15.00 %,  24.00 ft / 7.32 m,  26.00 ft / 7.92 m
    - Average freeboard:  25.68 ft / 7.83 m

Ship space, strength and comments:
 Space - Hull below water (magazines/engines, low = better): 89.6 %
  - Above water (accommodation/working, high = better): 201.8 %
 Waterplane Area: 65,170 Square feet or 6,055 Square metres
 Displacement factor (Displacement / loading): 112 %
 Structure weight / hull surface area: 201 lbs/sq ft or 983 Kg/sq metre
 Hull strength (Relative):
  - Cross-sectional: 0.99
  - Longitudinal: 1.14
  - Overall: 1.00
 Hull space for machinery, storage, compartmentation is adequate
 Room for accommodation and workspaces is excellent

The drawing of the anachronistic Repulse

This is the quick drawing I made of the anachronistic Repulse. I find that having a sketch results in a better design, as things such as the belt length have a more reasonable basis.

I had to reduce to image size to work in Internet Explorer (which most people use). I use Mozilla Firefox, and the larger size worked just fine with it.