The Ger/DD/1915 design

The Ger/DD/1915 is one of the last designs in the "Blue Book" from the early 1970's. This is the original specification:

Ger/DD/1915 

800 tons   20,000 SHP at 45 SHP/ton

240ft x 26ft  Depth = 20ft
Cp = 0.58   Cm = 0.80

Weights:
Armament       20 tons
Machinery     444 tons
Hull          272 tons
Miscellaneous  64 tons
Oil fuel      200 tons
Feedwater      50 tons    Full load 1050 tons

2-4in guns (1.7 ton) and 4-21in TT   20 mines on deck

This is the Springsharp report for what I was actually able to implement:

Ger/DD/1915, Germany Destroyer laid down 1915 (Engine 1950)

Displacement:
 762 t light; 790 t standard; 880 t normal; 952 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
 (248.31 ft / 240.00 ft) x 26.00 ft x (12.50 / 13.16 ft)
 (75.69 m / 73.15 m) x 7.92 m  x (3.81 / 4.01 m)

Armament:
      2 - 4.00" / 102 mm 45.0 cal guns - 32.00lbs / 14.51kg shells, 150 per gun
   Quick firing guns in deck and hoist mounts, 1915 Model
   2 x Single mounts on centreline ends, evenly spread
      Weight of broadside 64 lbs / 29 kg
      4 - 21.0" / 533 mm, 21.00 ft / 6.40 m torpedoes - 1.342 t each, 5.368 t total
 In 2 sets of deck mounted centre rotating tubes

Armour:
   - Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
 Main: 3.00" / 76 mm 2.00" / 51 mm  3.00" / 76 mm

Machinery:
 Oil fired boilers, steam turbines, 
 Geared drive, 2 shafts, 28,525 shp / 21,279 Kw = 32.00 kts
 Range 4,000nm at 14.00 kts
 Bunker at max displacement = 162 tons

Complement:
 80 - 105

Cost:
 £0.139 million / $0.556 million

Distribution of weights at normal displacement:
 Armament: 23 tons, 2.6 %
    - Guns: 18 tons, 2.0 %
    - Torpedoes: 5 tons, 0.6 %
 Armour: 26 tons, 3.0 %
    - Armament: 26 tons, 3.0 %
 Machinery: 447 tons, 50.8 %
 Hull, fittings & equipment: 245 tons, 27.9 %
 Fuel, ammunition & stores: 118 tons, 13.4 %
 Miscellaneous weights: 20 tons, 2.3 %
    - On freeboard deck: 20 tons

Overall survivability and seakeeping ability:
 Survivability (Non-critical penetrating hits needed to sink ship):
   216 lbs / 98 Kg = 6.8 x 4.0 " / 102 mm shells or 0.2 torpedoes
 Stability (Unstable if below 1.00): 1.15
 Metacentric height 0.9 ft / 0.3 m
 Roll period: 11.8 seconds
 Steadiness - As gun platform (Average = 50 %): 50 %
   - Recoil effect (Restricted arc if above 1.00): 0.27
 Seaboat quality  (Average = 1.00): 1.01

Hull form characteristics:
 Hull has raised forecastle,
   a normal bow and a cruiser stern
 Block coefficient (normal/deep): 0.395 / 0.406
 Length to Beam Ratio: 9.23 : 1
 'Natural speed' for length: 15.49 kts
 Power going to wave formation at top speed: 74 %
 Trim (Max stability = 0, Max steadiness = 100): 50
 Bow angle (Positive = bow angles forward): 6.00 degrees
 Stern overhang: 6.00 ft / 1.83 m
 Freeboard (% = length of deck as a percentage of waterline length):
    Fore end,  Aft end
    - Forecastle: 20.00 %,  22.00 ft / 6.71 m,  21.00 ft / 6.40 m
    - Forward deck: 30.00 %,  13.00 ft / 3.96 m,  13.00 ft / 3.96 m
    - Aft deck: 35.00 %,  13.00 ft / 3.96 m,  13.00 ft / 3.96 m
    - Quarter deck: 15.00 %,  13.00 ft / 3.96 m,  13.00 ft / 3.96 m
    - Average freeboard:  14.68 ft / 4.47 m

Ship space, strength and comments:
 Space - Hull below water (magazines/engines, low = better): 170.6 %
  - Above water (accommodation/working, high = better): 84.1 %
 Waterplane Area: 3,828 Square feet or 356 Square metres
 Displacement factor (Displacement / loading): 60 %
 Structure weight / hull surface area: 25 lbs/sq ft or 120 Kg/sq metre
 Hull strength (Relative):
  - Cross-sectional: 0.39
  - Longitudinal: 5.29
  - Overall: 0.51
 Hull space for machinery, storage, compartmentation is cramped
 Room for accommodation and workspaces is cramped

My most successful Ger/DM/1913 design

My Ger/DM/1913 design would have had one ship built to it, named the Meteor, after the real German minelayer. The specifications are very demanding for the current state of the art Springsharp:

Ger/DM/1913  Meteor  

1600 tons   350ft x 36ft

2-6in guns and 250 mines   40,000 SHP = 35 knots

I had to have a draft that is too deep for a ship of that size and a freeboard that is rather high. Still, I have never been able to do this well:

Ger/DM/1913 Meteor, Germany Destroyer Minelayer laid down 1913 (Engine 1950)

Displacement:
 1,822 t light; 1,879 t standard; 2,022 t normal; 2,136 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
 (352.52 ft / 350.00 ft) x 36.00 ft x (13.00 / 13.49 ft)
 (107.45 m / 106.68 m) x 10.97 m  x (3.96 / 4.11 m)

Armament:
      2 - 6.00" / 152 mm 45.0 cal guns - 100.00lbs / 45.36kg shells, 150 per gun
   Breech loading guns in deck and hoist mounts, 1913 Model
   1 x Single mount on centreline, forward deck forward
   1 x Single mount on centreline, aft deck forward
      Weight of broadside 200 lbs / 91 kg

Armour:
   - Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
 Main: 3.00" / 76 mm 2.00" / 51 mm  3.00" / 76 mm

Machinery:
 Oil fired boilers, steam turbines, 
 Direct drive, 2 shafts, 47,138 shp / 35,165 Kw = 35.00 kts
 Range 3,500nm at 14.00 kts
 Bunker at max displacement = 257 tons

Complement:
 149 - 195

Cost:
 £0.236 million / $0.943 million

Distribution of weights at normal displacement:
 Armament: 58 tons, 2.9 %
 Armour: 34 tons, 1.7 %
    - Armament: 34 tons, 1.7 %
 Machinery: 942 tons, 46.6 %
 Hull, fittings & equipment: 538 tons, 26.6 %
 Fuel, ammunition & stores: 200 tons, 9.9 %
 Miscellaneous weights: 250 tons, 12.4 %
    - On freeboard deck: 250 tons

Overall survivability and seakeeping ability:
 Survivability (Non-critical penetrating hits needed to sink ship):
   628 lbs / 285 Kg = 5.8 x 6.0 " / 152 mm shells or 0.4 torpedoes
 Stability (Unstable if below 1.00): 1.10
 Metacentric height 1.3 ft / 0.4 m
 Roll period: 13.3 seconds
 Steadiness - As gun platform (Average = 50 %): 50 %
   - Recoil effect (Restricted arc if above 1.00): 0.32
 Seaboat quality  (Average = 1.00): 1.01

Hull form characteristics:
 Hull has rise forward of midbreak,
   a normal bow and large transom stern
 Block coefficient (normal/deep): 0.432 / 0.440
 Length to Beam Ratio: 9.72 : 1
 'Natural speed' for length: 21.59 kts
 Power going to wave formation at top speed: 71 %
 Trim (Max stability = 0, Max steadiness = 100): 50
 Bow angle (Positive = bow angles forward): 6.00 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 %,  24.00 ft / 7.32 m,  22.00 ft / 6.71 m
    - Forward deck: 15.00 %,  22.00 ft / 6.71 m,  22.00 ft / 6.71 m
    - Aft deck: 50.00 %,  15.00 ft / 4.57 m,  15.00 ft / 4.57 m
    - Quarter deck: 15.00 %,  15.00 ft / 4.57 m,  15.00 ft / 4.57 m
    - Average freeboard:  17.61 ft / 5.37 m

Ship space, strength and comments:
 Space - Hull below water (magazines/engines, low = better): 159.9 %
  - Above water (accommodation/working, high = better): 174.8 %
 Waterplane Area: 8,228 Square feet or 764 Square metres
 Displacement factor (Displacement / loading): 74 %
 Structure weight / hull surface area: 32 lbs/sq ft or 158 Kg/sq metre
 Hull strength (Relative):
  - Cross-sectional: 0.43
  - Longitudinal: 2.76
  - Overall: 0.52
 Hull space for machinery, storage, compartmentation is cramped
 Room for accommodation and workspaces is excellent

An "alternate" Ger/CL/1914 design

I have long admired the Russian light cruisers built right before and during the Great War. They seemed to have some German influence. I thought that I would try designing a German ship along those lines, although persisting in using English units for torpedos and guns. I wanted to keep using coal-fired boilers, as that would have been what would have been actually used. This is my Springsharp design:

Ger/CL/1914 Alternate, Germany Light Cruiser laid down 1914 (Engine 1937)

Displacement:
 6,627 t light; 6,853 t standard; 7,494 t normal; 8,007 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
 (524.10 ft / 518.00 ft) x 53.00 ft x (17.00 / 17.93 ft)
 (159.75 m / 157.89 m) x 16.15 m  x (5.18 / 5.46 m)

Armament:
      12 - 5.10" / 130 mm 50.0 cal guns - 70.00lbs / 31.75kg shells, 150 per gun
   Quick firing guns in deck and hoist mounts, 1914 Model
   2 x Single mounts on centreline ends, evenly spread
   10 x Single mounts on sides, evenly spread
      Weight of broadside 840 lbs / 381 kg
      4 - 21.0" / 533 mm, 22.00 ft / 6.71 m torpedoes - 1.397 t each, 5.589 t total
 In 2 sets of deck mounted side rotating tubes

Armour:
   - Belts:  Width (max) Length (avg)  Height (avg)
 Main: 4.00" / 102 mm 370.00 ft / 112.78 m 12.00 ft / 3.66 m
 Ends: Unarmoured
   Main Belt covers 110 % of normal length
   Main belt does not fully cover magazines and engineering spaces

   - Torpedo Bulkhead:
  0.70" / 18 mm 370.00 ft / 112.78 m 16.00 ft / 4.88 m

   - Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
 Main: 3.00" / 76 mm 2.00" / 51 mm  3.00" / 76 mm

   - Protected deck - single deck: 2.00" / 51 mm For and Aft decks
 Forecastle: 2.00" / 51 mm  Quarter deck: 2.00" / 51 mm

   - Conning towers: Forward 5.00" / 127 mm,  Aft 0.00" / 0 mm

Machinery:
 Coal fired boilers, steam turbines, 
 Geared drive, 2 shafts, 59,473 shp / 44,367 Kw = 30.00 kts
 Range 5,200nm at 14.00 kts
 Bunker at max displacement = 1,155 tons (100% coal)

Complement:
 402 - 523

Cost:
 £0.732 million / $2.927 million

Distribution of weights at normal displacement:
 Armament: 257 tons, 3.4 %
    - Guns: 252 tons, 3.4 %
    - Torpedoes: 6 tons, 0.1 %
 Armour: 1,822 tons, 24.3 %
    - Belts: 722 tons, 9.6 %
    - Torpedo bulkhead: 153 tons, 2.0 %
    - Armament: 183 tons, 2.4 %
    - Armour Deck: 722 tons, 9.6 %
    - Conning Tower: 41 tons, 0.6 %
 Machinery: 1,813 tons, 24.2 %
 Hull, fittings & equipment: 2,734 tons, 36.5 %
 Fuel, ammunition & stores: 867 tons, 11.6 %
 Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
 Survivability (Non-critical penetrating hits needed to sink ship):
   12,041 lbs / 5,462 Kg = 181.5 x 5.1 " / 130 mm shells or 1.8 torpedoes
 Stability (Unstable if below 1.00): 1.15
 Metacentric height 2.5 ft / 0.8 m
 Roll period: 14.1 seconds
 Steadiness - As gun platform (Average = 50 %): 69 %
   - Recoil effect (Restricted arc if above 1.00): 0.42
 Seaboat quality  (Average = 1.00): 1.38

Hull form characteristics:
 Hull has low quarterdeck ,
   a normal bow and a cruiser stern
 Block coefficient (normal/deep): 0.562 / 0.569
 Length to Beam Ratio: 9.77 : 1
 'Natural speed' for length: 22.76 kts
 Power going to wave formation at top speed: 58 %
 Trim (Max stability = 0, Max steadiness = 100): 50
 Bow angle (Positive = bow angles forward): 5.00 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 %,  24.00 ft / 7.32 m,  23.00 ft / 7.01 m
    - Forward deck: 30.00 %,  23.00 ft / 7.01 m,  23.00 ft / 7.01 m
    - Aft deck: 23.00 %,  23.00 ft / 7.01 m,  23.00 ft / 7.01 m
    - Quarter deck: 27.00 %,  15.00 ft / 4.57 m,  15.00 ft / 4.57 m
    - Average freeboard:  20.92 ft / 6.38 m
 Ship tends to be wet forward

Ship space, strength and comments:
 Space - Hull below water (magazines/engines, low = better): 144.5 %
  - Above water (accommodation/working, high = better): 206.4 %
 Waterplane Area: 19,377 Square feet or 1,800 Square metres
 Displacement factor (Displacement / loading): 119 %
 Structure weight / hull surface area: 86 lbs/sq ft or 418 Kg/sq metre
 Hull strength (Relative):
  - Cross-sectional: 0.93
  - Longitudinal: 1.91
  - 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

A conservative Ger/DL/1912 design (but not real)

This is a conservative Ger/DL/1912 design that is not intended to be "real German", but more like our alternate history German designs. The main thing is that is more realistic is using coal-fired boilers. The speed is 33 knots, which is not too extreme. The guns are heavier than you might expect, at 4-5.1in QF. The tubes are not a German size. They are 6-21in TT in three twin mounts. This sort of ship is not able to take much damage, which is the downside of all of these designs. This is the Springsharp report:

Ger/DL/1912, Germany Destroyer laid down 1912 (Engine 1950)

Displacement:
 1,536 t light; 1,602 t standard; 1,802 t normal; 1,961 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
 (357.42 ft / 350.00 ft) x 35.00 ft x (11.00 / 11.70 ft)
 (108.94 m / 106.68 m) x 10.67 m  x (3.35 / 3.57 m)

Armament:
      4 - 5.10" / 130 mm 45.0 cal guns - 65.00lbs / 29.48kg shells, 150 per gun
   Quick firing guns in deck and hoist mounts, 1912 Model
   4 x Single mounts on centreline, evenly spread
   Aft Main mounts separated by engine room
      Weight of broadside 260 lbs / 118 kg
      6 - 21.0" / 533 mm, 22.00 ft / 6.71 m torpedoes - 1.389 t each, 8.335 t total
 In 3 sets of deck mounted carriage/fixed tubes

Armour:
   - Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
 Main: 3.00" / 76 mm 2.00" / 51 mm  3.00" / 76 mm

Machinery:
 Coal fired boilers, steam turbines, 
 Direct drive, 2 shafts, 41,996 shp / 31,329 Kw = 33.00 kts
 Range 4,300nm at 14.00 kts
 Bunker at max displacement = 359 tons (100% coal)

Complement:
 137 - 179

Cost:
 £0.203 million / $0.813 million

Distribution of weights at normal displacement:
 Armament: 80 tons, 4.5 %
    - Guns: 72 tons, 4.0 %
    - Torpedoes: 8 tons, 0.5 %
 Armour: 60 tons, 3.3 %
    - Armament: 60 tons, 3.3 %
 Machinery: 887 tons, 49.2 %
 Hull, fittings & equipment: 479 tons, 26.6 %
 Fuel, ammunition & stores: 266 tons, 14.7 %
 Miscellaneous weights: 30 tons, 1.7 %
    - On freeboard deck: 30 tons

Overall survivability and seakeeping ability:
 Survivability (Non-critical penetrating hits needed to sink ship):
   499 lbs / 226 Kg = 7.5 x 5.1 " / 130 mm shells or 0.3 torpedoes
 Stability (Unstable if below 1.00): 1.25
 Metacentric height 1.6 ft / 0.5 m
 Roll period: 11.8 seconds
 Steadiness - As gun platform (Average = 50 %): 51 %
   - Recoil effect (Restricted arc if above 1.00): 0.35
 Seaboat quality  (Average = 1.00): 1.02

Hull form characteristics:
 Hull has raised forecastle,
   a normal bow and a cruiser stern
 Block coefficient (normal/deep): 0.468 / 0.479
 Length to Beam Ratio: 10.00 : 1
 'Natural speed' for length: 18.71 kts
 Power going to wave formation at top speed: 69 %
 Trim (Max stability = 0, Max steadiness = 100): 50
 Bow angle (Positive = bow angles forward): 6.00 degrees
 Stern overhang: 5.00 ft / 1.52 m
 Freeboard (% = length of deck as a percentage of waterline length):
    Fore end,  Aft end
    - Forecastle: 28.00 %,  23.00 ft / 7.01 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:  16.35 ft / 4.98 m

Ship space, strength and comments:
 Space - Hull below water (magazines/engines, low = better): 171.9 %
  - Above water (accommodation/working, high = better): 149.9 %
 Waterplane Area: 7,933 Square feet or 737 Square metres
 Displacement factor (Displacement / loading): 71 %
 Structure weight / hull surface area: 32 lbs/sq ft or 157 Kg/sq metre
 Hull strength (Relative):
  - Cross-sectional: 0.46
  - Longitudinal: 1.97
  - Overall: 0.53
 Hull space for machinery, storage, compartmentation is cramped
 Room for accommodation and workspaces is excellent

"www.the-blueprints.com" has a good Novik drawing

"www.the-blueprints.com" has an impressive sideview and planview of the Russian destroyer Novik (1913). My best coverage is form the 1919 Jane's Fighting Ships, although Conway's might be good, as well.

The famous Russian destroyer Novik

The destroyer Novik was the first of the new generation ships built for the Russian navy prior to the Great War. This is a photograph of indeterminate date (at least for me).

The Ger/DD/1914 design

This is the original specification for the Ger/DD/1914, probably dating from 1971:

Ger/DD/1914

2-4in QF guns, 6-21in TT  20 mines
265ft x 27ft  900 tons
200 tons of oil fuel  18,000 SHP = 32 knots
Cost: £81,000

I tried very hard to come close to this specification. The resulting design has a very high freeboard for the size of the ship:

Ger/DD/1914, Germany Destroyer laid down 1914 (Engine 1950)

Displacement:
 861 t light; 895 t standard; 1,009 t normal; 1,100 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
 (272.10 ft / 265.00 ft) x 27.00 ft x (10.50 / 11.19 ft)
 (82.94 m / 80.77 m) x 8.23 m  x (3.20 / 3.41 m)

Armament:
      2 - 4.00" / 102 mm 50.0 cal guns - 32.00lbs / 14.51kg shells, 150 per gun
   Quick firing guns in deck and hoist mounts, 1914 Model
   2 x Single mounts on centreline ends, evenly spread
      Weight of broadside 64 lbs / 29 kg
      6 - 21.0" / 533 mm, 22.00 ft / 6.71 m torpedoes - 1.397 t each, 8.383 t total
 In 3 sets of deck mounted carriage/fixed tubes

Armour:
   - Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
 Main: 2.00" / 51 mm 1.00" / 25 mm  1.00" / 25 mm

Machinery:
 Oil fired boilers, steam turbines, 
 Geared drive, 2 shafts, 30,310 shp / 22,611 Kw = 32.00 kts
 Range 4,000nm at 15.00 kts
 Bunker at max displacement = 205 tons

Complement:
 89 - 116

Cost:
 £0.139 million / $0.557 million

Distribution of weights at normal displacement:
 Armament: 29 tons, 2.9 %
    - Guns: 21 tons, 2.1 %
    - Torpedoes: 8 tons, 0.8 %
 Armour: 14 tons, 1.4 %
    - Armament: 14 tons, 1.4 %
 Machinery: 514 tons, 50.9 %
 Hull, fittings & equipment: 284 tons, 28.2 %
 Fuel, ammunition & stores: 148 tons, 14.7 %
 Miscellaneous weights: 20 tons, 2.0 %
    - On freeboard deck: 20 tons

Overall survivability and seakeeping ability:
 Survivability (Non-critical penetrating hits needed to sink ship):
   286 lbs / 130 Kg = 8.9 x 4.0 " / 102 mm shells or 0.2 torpedoes
 Stability (Unstable if below 1.00): 1.22
 Metacentric height 1.0 ft / 0.3 m
 Roll period: 11.3 seconds
 Steadiness - As gun platform (Average = 50 %): 51 %
   - Recoil effect (Restricted arc if above 1.00): 0.24
 Seaboat quality  (Average = 1.00): 1.02

Hull form characteristics:
 Hull has raised forecastle,
   a normal bow and a cruiser stern
 Block coefficient (normal/deep): 0.470 / 0.481
 Length to Beam Ratio: 9.81 : 1
 'Natural speed' for length: 16.28 kts
 Power going to wave formation at top speed: 74 %
 Trim (Max stability = 0, Max steadiness = 100): 50
 Bow angle (Positive = bow angles forward): 6.00 degrees
 Stern overhang: 5.00 ft / 1.52 m
 Freeboard (% = length of deck as a percentage of waterline length):
    Fore end,  Aft end
    - Forecastle: 23.00 %,  20.00 ft / 6.10 m,  19.00 ft / 5.79 m
    - Forward deck: 30.00 %,  14.00 ft / 4.27 m,  14.00 ft / 4.27 m
    - Aft deck: 32.00 %,  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:  15.24 ft / 4.65 m

Ship space, strength and comments:
 Space - Hull below water (magazines/engines, low = better): 171.1 %
  - Above water (accommodation/working, high = better): 132.2 %
 Waterplane Area: 4,642 Square feet or 431 Square metres
 Displacement factor (Displacement / loading): 65 %
 Structure weight / hull surface area: 25 lbs/sq ft or 123 Kg/sq metre
 Hull strength (Relative):
  - Cross-sectional: 0.42
  - Longitudinal: 4.35
  - Overall: 0.53
 Hull space for machinery, storage, compartmentation is cramped
 Room for accommodation and workspaces is excellent

The Ger/DL/1914 design

I tried a different tact with my Ger/DL/1914 design, dating from the early 1970's. This is my original specification:

Ger/DL/1914

4-4in QF guns and 6-21in TT   32 knots  25,000 SHP
320ft x 33ft   30 mines  1250 tons
250 tons of oil fuel

I took that as my starting point for a Springsharp design. My design actually ended up having a smaller displacement:

Ger/DL/1914, Germany Destroyer Leader laid down 1914 (Engine 1950)

Displacement:
 1,029 t light; 1,072 t standard; 1,208 t normal; 1,318 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
 (327.84 ft / 320.00 ft) x 33.00 ft x (9.00 / 9.57 ft)
 (99.92 m / 97.54 m) x 10.06 m  x (2.74 / 2.92 m)

Armament:
      4 - 4.00" / 102 mm 50.0 cal guns - 32.00lbs / 14.51kg shells, 150 per gun
   Quick firing guns in deck and hoist mounts, 1914 Model
   4 x Single mounts on centreline, evenly spread
   Aft Main mounts separated by engine room
      Weight of broadside 128 lbs / 58 kg
      6 - 21.0" / 533 mm, 22.00 ft / 6.71 m torpedoes - 1.397 t each, 8.383 t total
 In 3 sets of deck mounted centre rotating tubes

Armour:
   - Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
 Main: 2.00" / 51 mm 1.00" / 25 mm  2.00" / 51 mm

Machinery:
 Oil fired boilers, steam turbines, 
 Geared drive, 2 shafts, 29,839 shp / 22,260 Kw = 32.00 kts
 Range 5,200nm at 14.00 kts
 Bunker at max displacement = 246 tons

Complement:
 102 - 133

Cost:
 £0.166 million / $0.664 million

Distribution of weights at normal displacement:
 Armament: 50 tons, 4.1 %
    - Guns: 42 tons, 3.4 %
    - Torpedoes: 8 tons, 0.7 %
 Armour: 28 tons, 2.3 %
    - Armament: 28 tons, 2.3 %
 Machinery: 570 tons, 47.2 %
 Hull, fittings & equipment: 350 tons, 29.0 %
 Fuel, ammunition & stores: 180 tons, 14.9 %
 Miscellaneous weights: 30 tons, 2.5 %
    - On freeboard deck: 30 tons

Overall survivability and seakeeping ability:
 Survivability (Non-critical penetrating hits needed to sink ship):
   423 lbs / 192 Kg = 13.2 x 4.0 " / 102 mm shells or 0.3 torpedoes
 Stability (Unstable if below 1.00): 1.28
 Metacentric height 1.5 ft / 0.5 m
 Roll period: 11.4 seconds
 Steadiness - As gun platform (Average = 50 %): 51 %
   - Recoil effect (Restricted arc if above 1.00): 0.23
 Seaboat quality  (Average = 1.00): 1.02

Hull form characteristics:
 Hull has raised forecastle,
   a normal bow and a cruiser stern
 Block coefficient (normal/deep): 0.445 / 0.456
 Length to Beam Ratio: 9.70 : 1
 'Natural speed' for length: 17.89 kts
 Power going to wave formation at top speed: 68 %
 Trim (Max stability = 0, Max steadiness = 100): 50
 Bow angle (Positive = bow angles forward): 5.00 degrees
 Stern overhang: 6.00 ft / 1.83 m
 Freeboard (% = length of deck as a percentage of waterline length):
    Fore end,  Aft end
    - Forecastle: 20.00 %,  21.00 ft / 6.40 m,  20.00 ft / 6.10 m
    - Forward deck: 30.00 %,  14.00 ft / 4.27 m,  14.00 ft / 4.27 m
    - Aft deck: 35.00 %,  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:  15.28 ft / 4.66 m

Ship space, strength and comments:
 Space - Hull below water (magazines/engines, low = better): 163.5 %
  - Above water (accommodation/working, high = better): 117.5 %
 Waterplane Area: 6,709 Square feet or 623 Square metres
 Displacement factor (Displacement / loading): 74 %
 Structure weight / hull surface area: 28 lbs/sq ft or 137 Kg/sq metre
 Hull strength (Relative):
  - Cross-sectional: 0.44
  - Longitudinal: 2.09
  - Overall: 0.51
 Hull space for machinery, storage, compartmentation is cramped
 Room for accommodation and workspaces is adequate

An even older turret ship: the GB/BB/1868

I thought that the next step could be an even older turret ship, a contemporary to the Monarch and Captain: the GB/BB/1868. There is the minor detail that I didn't try to deal with masts and rigging. Unless such a feature were added to Springsharp, to be able to handle rigged ships, I wouldn't even attempt such a thing. This ship has 4-12 guns and 6-4in guns. The armour basis is 12in and the deck is 3in. The belt is complete, although the ends are thinner. The speed is low: just 12 knots. This is the Springsharp report:

GB/BB/1868 turret ship, Great Britain Battleship laid down 1868
Central citadel ship

Displacement:
 9,298 t light; 9,649 t standard; 10,570 t normal; 11,307 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
 (339.00 ft / 325.00 ft) x 68.00 ft x (27.00 / 28.60 ft)
 (103.33 m / 99.06 m) x 20.73 m  x (8.23 / 8.72 m)

Armament:
      4 - 12.00" / 305 mm 25.0 cal guns - 642.00lbs / 291.21kg shells, 90 per gun
   Breech loading guns in Coles/Ericsson turret mounts, 1868 Model
   1 x Twin mount on centreline, forward evenly spread
   1 x Twin mount on centreline, aft deck centre
      6 - 4.00" / 102 mm 25.0 cal guns - 23.79lbs / 10.79kg shells, 150 per gun
   Breech loading guns in casemate mounts, 1868 Model
   6 x Single mounts on sides amidships
      Weight of broadside 2,711 lbs / 1,230 kg

Armour:
   - Belts:  Width (max) Length (avg)  Height (avg)
 Main: 12.0" / 305 mm 240.00 ft / 73.15 m 16.00 ft / 4.88 m
 Ends: 8.00" / 203 mm   85.00 ft / 25.91 m 16.00 ft / 4.88 m
   Main Belt covers 114 % of normal length

   - Torpedo Bulkhead:
  1.00" / 25 mm 240.00 ft / 73.15 m 27.00 ft / 8.23 m

   - Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
 Main: 12.0" / 305 mm 8.00" / 203 mm        -
 2nd: 8.00" / 203 mm 5.00" / 127 mm  8.00" / 203 mm

   - Armoured deck - multiple decks: 3.00" / 76 mm For and Aft decks
 Forecastle: 3.00" / 76 mm  Quarter deck: 3.00" / 76 mm

   - Conning towers: Forward 12.00" / 305 mm,  Aft 0.00" / 0 mm

Machinery:
 Coal fired boilers, simple reciprocating steam engines, 
 Direct drive, 1 shaft, 4,411 ihp / 3,290 Kw = 13.00 kts
 Range 4,200nm at 8.00 kts
 Bunker at max displacement = 1,657 tons (100% coal)

Complement:
 520 - 677

Cost:
 £0.621 million / $2.483 million

Distribution of weights at normal displacement:
 Armament: 266 tons, 2.5 %
 Armour: 4,179 tons, 39.5 %
    - Belts: 2,444 tons, 23.1 %
    - Torpedo bulkhead: 240 tons, 2.3 %
    - Armament: 468 tons, 4.4 %
    - Armour Deck: 903 tons, 8.5 %
    - Conning Tower: 125 tons, 1.2 %
 Machinery: 1,130 tons, 10.7 %
 Hull, fittings & equipment: 3,723 tons, 35.2 %
 Fuel, ammunition & stores: 1,272 tons, 12.0 %
 Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
 Survivability (Non-critical penetrating hits needed to sink ship):
   14,603 lbs / 6,624 Kg = 25.2 x 12.0 " / 305 mm shells or 2.8 torpedoes
 Stability (Unstable if below 1.00): 1.40
 Metacentric height 5.0 ft / 1.5 m
 Roll period: 12.7 seconds
 Steadiness - As gun platform (Average = 50 %): 95 %
   - Recoil effect (Restricted arc if above 1.00): 0.36
 Seaboat quality  (Average = 1.00): 1.89

Hull form characteristics:
 Hull has raised forecastle, rise aft of midbreak, low quarterdeck ,
   a ram bow and a cruiser stern
 Block coefficient (normal/deep): 0.620 / 0.626
 Length to Beam Ratio: 4.78 : 1
 'Natural speed' for length: 18.03 kts
 Power going to wave formation at top speed: 39 %
 Trim (Max stability = 0, Max steadiness = 100): 50
 Bow angle (Positive = bow angles forward): -3.00 degrees
 Stern overhang: 5.00 ft / 1.52 m
 Freeboard (% = length of deck as a percentage of waterline length):
    Fore end,  Aft end
    - Forecastle: 15.00 %,  19.00 ft / 5.79 m,  19.00 ft / 5.79 m
    - Forward deck: 20.00 %,  11.00 ft / 3.35 m,  11.00 ft / 3.35 m
    - Aft deck: 28.00 %,  19.00 ft / 5.79 m,  19.00 ft / 5.79 m
    - Quarter deck: 37.00 %,  11.00 ft / 3.35 m,  11.00 ft / 3.35 m
    - Average freeboard:  14.44 ft / 4.40 m
 Ship tends to be wet forward

Ship space, strength and comments:
 Space - Hull below water (magazines/engines, low = better): 68.2 %
  - Above water (accommodation/working, high = better): 92.7 %
 Waterplane Area: 16,161 Square feet or 1,501 Square metres
 Displacement factor (Displacement / loading): 136 %
 Structure weight / hull surface area: 158 lbs/sq ft or 772 Kg/sq metre
 Hull strength (Relative):
  - Cross-sectional: 0.88
  - Longitudinal: 2.90
  - Overall: 1.00
 Hull space for machinery, storage, compartmentation is excellent
 Room for accommodation and workspaces is adequate
 Ship has slow, easy roll, a good, steady gun platform
 Excellent seaboat, comfortable, can fire her guns in the heaviest weather

How about an 1876 battleship?

Just for fun, I thought that I would try an 1876 battleship: the GB/BB/1876. This is intended to be a sort of breastwork monitor type, similar to the Devastation type. My freeboard may actually be higher than than the Devastation. My ship has 4-12.5in and 6-6in guns. The armour basis is 14 inches with unarmoured ends. They have 4in deck protection, only. My main battery is in Coles turrets. The speed is 14 knots, which I would think would be reasonable for the date. This is the Springsharp report:

GB/BB/1876, Great Britain Battleship laid down 1876

Displacement:
 10,604 t light; 11,044 t standard; 11,996 t normal; 12,757 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
 (358.00 ft / 345.00 ft) x 72.00 ft x (27.00 / 28.43 ft)
 (109.12 m / 105.16 m) x 21.95 m  x (8.23 / 8.67 m)

Armament:
      4 - 12.50" / 318 mm 25.0 cal guns - 785.00lbs / 356.07kg shells, 90 per gun
   Breech loading guns in Coles/Ericsson turret mounts, 1876 Model
   2 x Single mounts on centreline ends, evenly spread
      6 - 6.00" / 152 mm 26.0 cal guns - 87.43lbs / 39.66kg shells, 150 per gun
   Breech loading guns in casemate mounts, 1876 Model
   6 x Single mounts on sides amidships
      Weight of broadside 3,665 lbs / 1,662 kg

Armour:
   - Belts:  Width (max) Length (avg)  Height (avg)
 Main: 14.0" / 356 mm 270.00 ft / 82.30 m 16.00 ft / 4.88 m
 Ends: Unarmoured
   Main Belt covers 120 % of normal length

   - Torpedo Bulkhead:
  1.00" / 25 mm 270.00 ft / 82.30 m 27.00 ft / 8.23 m

   - Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
 Main: 14.0" / 356 mm 7.00" / 178 mm        -
 2nd: 8.00" / 203 mm 5.00" / 127 mm  8.00" / 203 mm

   - Armoured deck - multiple decks: 3.00" / 76 mm For and Aft decks
 Forecastle: 4.00" / 102 mm  Quarter deck: 4.00" / 102 mm

   - Conning towers: Forward 14.00" / 356 mm,  Aft 0.00" / 0 mm

Machinery:
 Coal fired boilers, simple reciprocating steam engines, 
 Direct drive, 2 shafts, 5,796 ihp / 4,324 Kw = 14.00 kts
 Range 4,200nm at 9.00 kts
 Bunker at max displacement = 1,712 tons (100% coal)

Complement:
 573 - 745

Cost:
 £0.727 million / $2.908 million

Distribution of weights at normal displacement:
 Armament: 423 tons, 3.5 %
 Armour: 4,746 tons, 39.6 %
    - Belts: 2,645 tons, 22.0 %
    - Torpedo bulkhead: 270 tons, 2.2 %
    - Armament: 538 tons, 4.5 %
    - Armour Deck: 1,136 tons, 9.5 %
    - Conning Tower: 158 tons, 1.3 %
 Machinery: 1,271 tons, 10.6 %
 Hull, fittings & equipment: 4,163 tons, 34.7 %
 Fuel, ammunition & stores: 1,392 tons, 11.6 %
 Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
 Survivability (Non-critical penetrating hits needed to sink ship):
   22,047 lbs / 10,000 Kg = 28.6 x 12.5 " / 318 mm shells or 3.9 torpedoes
 Stability (Unstable if below 1.00): 1.37
 Metacentric height 5.3 ft / 1.6 m
 Roll period: 13.1 seconds
 Steadiness - As gun platform (Average = 50 %): 100 %
   - Recoil effect (Restricted arc if above 1.00): 0.58
 Seaboat quality  (Average = 1.00): 2.00

Hull form characteristics:
 Hull has low forecastle, low quarterdeck ,
   a ram bow and a cruiser stern
 Block coefficient (normal/deep): 0.626 / 0.632
 Length to Beam Ratio: 4.79 : 1
 'Natural speed' for length: 18.57 kts
 Power going to wave formation at top speed: 41 %
 Trim (Max stability = 0, Max steadiness = 100): 50
 Bow angle (Positive = bow angles forward): -4.00 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 %,  14.00 ft / 4.27 m,  14.00 ft / 4.27 m
    - Forward deck: 30.00 %,  22.00 ft / 6.71 m,  22.00 ft / 6.71 m
    - Aft deck: 25.00 %,  22.00 ft / 6.71 m,  22.00 ft / 6.71 m
    - Quarter deck: 25.00 %,  12.00 ft / 3.66 m,  12.00 ft / 3.66 m
    - Average freeboard:  17.90 ft / 5.46 m
 Ship tends to be wet forward

Ship space, strength and comments:
 Space - Hull below water (magazines/engines, low = better): 68.9 %
  - Above water (accommodation/working, high = better): 136.1 %
 Waterplane Area: 18,613 Square feet or 1,729 Square metres
 Displacement factor (Displacement / loading): 134 %
 Structure weight / hull surface area: 157 lbs/sq ft or 767 Kg/sq metre
 Hull strength (Relative):
  - Cross-sectional: 0.87
  - Longitudinal: 3.74
  - 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 generic 1905 Tribal class destroyer

I am shocked. I was able to make a generic 1905 British Tribal class destroyer work in Springsharp 3.0b2 Beta. This is a class of ship that eventually carried 2-4in QF guns and 2-18in TT. They were originally intended to have a speed of 33 knots and carry 90 tons of oil fuel. I have done pretty well, I think, except that my ship is very light, and depends on the lightest weight machinery:

GB/DD/1905 generic Tribal class, Great Britain Destroyer laid down 1905 (Engine 1950)

Displacement:
 633 t light; 655 t standard; 723 t normal; 777 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
 (276.84 ft / 275.00 ft) x 28.00 ft x (9.00 / 9.41 ft)
 (84.38 m / 83.82 m) x 8.53 m  x (2.74 / 2.87 m)

Armament:
      2 - 4.00" / 102 mm 45.0 cal guns - 32.27lbs / 14.64kg shells, 150 per gun
   Quick firing guns in deck mounts, 1905 Model
   2 x Single mounts on centreline ends, evenly spread
      Weight of broadside 65 lbs / 29 kg
      2 - 18.0" / 457 mm, 20.00 ft / 6.10 m torpedoes - 0.865 t each, 1.729 t total
 In 2 sets of deck mounted centre rotating tubes

Machinery:
 Oil fired boilers, steam turbines, 
 Direct drive, 2 shafts, 25,253 shp / 18,839 Kw = 33.00 kts
 Range 3,500nm at 14.00 kts
 Bunker at max displacement = 123 tons

Complement:
 69 - 90

Cost:
 £0.079 million / $0.315 million

Distribution of weights at normal displacement:
 Armament: 13 tons, 1.8 %
    - Guns: 12 tons, 1.6 %
    - Torpedoes: 2 tons, 0.2 %
 Machinery: 381 tons, 52.7 %
 Hull, fittings & equipment: 239 tons, 33.0 %
 Fuel, ammunition & stores: 90 tons, 12.4 %
 Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
 Survivability (Non-critical penetrating hits needed to sink ship):
   242 lbs / 110 Kg = 7.6 x 4.0 " / 102 mm shells or 0.2 torpedoes
 Stability (Unstable if below 1.00): 1.37
 Metacentric height 1.3 ft / 0.4 m
 Roll period: 10.4 seconds
 Steadiness - As gun platform (Average = 50 %): 52 %
   - Recoil effect (Restricted arc if above 1.00): 0.10
 Seaboat quality  (Average = 1.00): 1.04

Hull form characteristics:
 Hull has rise forward of midbreak,
   a normal bow and a round stern
 Block coefficient (normal/deep): 0.365 / 0.375
 Length to Beam Ratio: 9.82 : 1
 'Natural speed' for length: 16.58 kts
 Power going to wave formation at top speed: 70 %
 Trim (Max stability = 0, Max steadiness = 100): 50
 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: 14.00 %,  21.00 ft / 6.40 m,  19.00 ft / 5.79 m
    - Forward deck: 15.00 %,  19.00 ft / 5.79 m,  19.00 ft / 5.79 m
    - Aft deck: 56.00 %,  11.00 ft / 3.35 m,  11.00 ft / 3.35 m
    - Quarter deck: 15.00 %,  11.00 ft / 3.35 m,  11.00 ft / 3.35 m
    - Average freeboard:  13.43 ft / 4.09 m

Ship space, strength and comments:
 Space - Hull below water (magazines/engines, low = better): 174.8 %
  - Above water (accommodation/working, high = better): 123.0 %
 Waterplane Area: 4,635 Square feet or 431 Square metres
 Displacement factor (Displacement / loading): 58 %
 Structure weight / hull surface area: 25 lbs/sq ft or 121 Kg/sq metre
 Hull strength (Relative):
  - Cross-sectional: 0.43
  - Longitudinal: 3.07
  - Overall: 0.53
 Hull space for machinery, storage, compartmentation is cramped
 Room for accommodation and workspaces is excellent

We should be able to do better: GB/DD/1921 small and somewhat fast

I wanted to see what could be done with a smaller British destroyer for 1921. I was able to achieve a 35 knot speed with 4-4.7in QF, 6-2pdr AA guns, and 6-21in TT. We should be able to achieve a higher speed than this. This is the Springsharp report:

GB/DD/1921 small and fast, Great Britain Destroyer laid down 1921 (Engine 1950)

Displacement:
 1,251 t light; 1,306 t standard; 1,429 t normal; 1,527 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
 (358.23 ft / 355.00 ft) x 33.00 ft x (11.00 / 11.46 ft)
 (109.19 m / 108.20 m) x 10.06 m  x (3.35 / 3.49 m)

Armament:
      4 - 4.70" / 119 mm 45.0 cal guns - 52.35lbs / 23.75kg shells, 150 per gun
   Quick firing guns in deck and hoist mounts, 1921 Model
   4 x Single mounts on centreline ends, evenly spread
  2 raised mounts - superfiring
      6 - 1.57" / 40.0 mm 45.0 cal guns - 1.97lbs / 0.89kg shells, 150 per gun
   Anti-air guns in deck mounts, 1921 Model
   6 x Single mounts on sides, forward deck aft
      Weight of broadside 221 lbs / 100 kg
      6 - 21.0" / 533 mm, 20.00 ft / 6.10 m torpedoes - 1.307 t each, 7.841 t total
 In 2 sets of deck mounted carriage/fixed tubes

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

Machinery:
 Oil fired boilers, steam turbines, 
 Geared drive, 2 shafts, 36,069 shp / 26,907 Kw = 35.00 kts
 Range 3,800nm at 14.00 kts
 Bunker at max displacement = 221 tons

Complement:
 116 - 151

Cost:
 £0.410 million / $1.642 million

Distribution of weights at normal displacement:
 Armament: 68 tons, 4.7 %
    - Guns: 60 tons, 4.2 %
    - Torpedoes: 8 tons, 0.5 %
 Armour: 27 tons, 1.9 %
    - Armament: 27 tons, 1.9 %
 Machinery: 691 tons, 48.4 %
 Hull, fittings & equipment: 465 tons, 32.6 %
 Fuel, ammunition & stores: 178 tons, 12.4 %
 Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
 Survivability (Non-critical penetrating hits needed to sink ship):
   455 lbs / 206 Kg = 8.8 x 4.7 " / 119 mm shells or 0.3 torpedoes
 Stability (Unstable if below 1.00): 1.16
 Metacentric height 1.3 ft / 0.4 m
 Roll period: 12.4 seconds
 Steadiness - As gun platform (Average = 50 %): 53 %
   - Recoil effect (Restricted arc if above 1.00): 0.54
 Seaboat quality  (Average = 1.00): 1.06

Hull form characteristics:
 Hull has rise forward of midbreak,
   a normal bow and large transom stern
 Block coefficient (normal/deep): 0.388 / 0.398
 Length to Beam Ratio: 10.76 : 1
 'Natural speed' for length: 21.70 kts
 Power going to wave formation at top speed: 67 %
 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: 16.00 %,  23.00 ft / 7.01 m,  21.00 ft / 6.40 m
    - Forward deck: 16.00 %,  21.00 ft / 6.40 m,  21.00 ft / 6.40 m
    - Aft deck: 53.00 %,  13.00 ft / 3.96 m,  13.00 ft / 3.96 m
    - Quarter deck: 15.00 %,  13.00 ft / 3.96 m,  13.00 ft / 3.96 m
    - Average freeboard:  15.69 ft / 4.78 m

Ship space, strength and comments:
 Space - Hull below water (magazines/engines, low = better): 169.6 %
  - Above water (accommodation/working, high = better): 176.0 %
 Waterplane Area: 7,425 Square feet or 690 Square metres
 Displacement factor (Displacement / loading): 73 %
 Structure weight / hull surface area: 33 lbs/sq ft or 159 Kg/sq metre
 Hull strength (Relative):
  - Cross-sectional: 0.45
  - Longitudinal: 2.25
  - Overall: 0.53
 Hull space for machinery, storage, compartmentation is cramped
 Room for accommodation and workspaces is excellent

A very fast destroyer for 1921

I thought that the next design should be a very fast destroyer to be laid down in 1921. With the present Springsharp program, the ship has to quite long. Still, I have not done any as well as 36.5 knots for a destroyer before. The British had wanted to develop both 5in and 5.1in guns, but never got around do finalizing either caliber. This design has 4-5in guns, as this ship needs a substantial armament. This is the Springsharp report:

GB/DD/1921 very fast, Great Britain Destroyer laid down 1921 (Engine 1950)

Displacement:
 1,717 t light; 1,788 t standard; 1,970 t normal; 2,116 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
 (389.52 ft / 387.00 ft) x 36.00 ft x (12.50 / 13.07 ft)
 (118.73 m / 117.96 m) x 10.97 m  x (3.81 / 3.99 m)

Armament:
      4 - 5.00" / 127 mm 55.0 cal guns - 65.00lbs / 29.48kg shells, 150 per gun
   Quick firing guns in deck and hoist mounts, 1921 Model
   4 x Single mounts on centreline ends, evenly spread
  2 raised mounts - superfiring
      8 - 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
   4 x Twin mounts on sides, forward deck aft
  4 raised mounts
      Weight of broadside 276 lbs / 125 kg
      6 - 21.0" / 533 mm, 22.00 ft / 6.71 m torpedoes - 1.425 t each, 8.551 t total
 In 2 sets of deck mounted centre rotating tubes

Armour:
   - Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
 Main: 2.00" / 51 mm 1.00" / 25 mm  2.00" / 51 mm

Machinery:
 Oil fired boilers, steam turbines, 
 Geared drive, 2 shafts, 50,701 shp / 37,823 Kw = 36.50 kts
 Range 4,700nm at 14.00 kts
 Bunker at max displacement = 328 tons

Complement:
 147 - 192

Cost:
 £0.587 million / $2.349 million

Distribution of weights at normal displacement:
 Armament: 101 tons, 5.1 %
    - Guns: 92 tons, 4.7 %
    - Torpedoes: 9 tons, 0.4 %
 Armour: 32 tons, 1.6 %
    - Armament: 32 tons, 1.6 %
 Machinery: 987 tons, 50.1 %
 Hull, fittings & equipment: 597 tons, 30.3 %
 Fuel, ammunition & stores: 253 tons, 12.8 %
 Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
 Survivability (Non-critical penetrating hits needed to sink ship):
   554 lbs / 251 Kg = 8.9 x 5.0 " / 127 mm shells or 0.3 torpedoes
 Stability (Unstable if below 1.00): 1.18
 Metacentric height 1.5 ft / 0.4 m
 Roll period: 12.5 seconds
 Steadiness - As gun platform (Average = 50 %): 52 %
   - Recoil effect (Restricted arc if above 1.00): 0.49
 Seaboat quality  (Average = 1.00): 1.02

Hull form characteristics:
 Hull has rise forward of midbreak,
   a normal bow and large transom stern
 Block coefficient (normal/deep): 0.396 / 0.407
 Length to Beam Ratio: 10.75 : 1
 'Natural speed' for length: 22.63 kts
 Power going to wave formation at top speed: 68 %
 Trim (Max stability = 0, Max steadiness = 100): 51
 Bow angle (Positive = bow angles forward): 6.00 degrees
 Stern overhang: 0.00 ft / 0.00 m
 Freeboard (% = length of deck as a percentage of waterline length):
    Fore end,  Aft end
    - Forecastle: 18.00 %,  24.00 ft / 7.32 m,  22.00 ft / 6.71 m
    - Forward deck: 17.00 %,  22.00 ft / 6.71 m,  22.00 ft / 6.71 m
    - Aft deck: 50.00 %,  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:  16.94 ft / 5.16 m

Ship space, strength and comments:
 Space - Hull below water (magazines/engines, low = better): 176.6 %
  - Above water (accommodation/working, high = better): 150.2 %
 Waterplane Area: 8,877 Square feet or 825 Square metres
 Displacement factor (Displacement / loading): 71 %
 Structure weight / hull surface area: 35 lbs/sq ft or 173 Kg/sq metre
 Hull strength (Relative):
  - Cross-sectional: 0.45
  - Longitudinal: 2.11
  - Overall: 0.53
 Hull space for machinery, storage, compartmentation is cramped
 Room for accommodation and workspaces is excellent

A very fast British super-destroyer: GB/DL/1921

I wanted to have a very fast British super-destroyer to work with the very fast heavy and light cruisers. I suspect that this ship is much larger than it should be, due to limitations with the current Springsharp 3.0b2 Beta. My ship has 6-5.1in QF guns in turrets, with one forward and two aft. There are also 2-4in AA and 8-2pdr AA guns, with 6-21in TT. The top speed is 37 knots and I made the ship large and long enough so that the design works well. This is the Springsharp report:

GB/DL/1921 very fast, Great Britain Destroyer Leader laid down 1921 (Engine 1950)

Displacement:
 2,176 t light; 2,276 t standard; 2,464 t normal; 2,614 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
 (411.65 ft / 408.00 ft) x 37.00 ft x (14.00 / 14.54 ft)
 (125.47 m / 124.36 m) x 11.28 m  x (4.27 / 4.43 m)

Armament:
      6 - 5.10" / 130 mm 55.0 cal guns - 72.00lbs / 32.66kg shells, 150 per gun
   Quick firing guns in turret on barbette mounts, 1921 Model
   3 x Twin mounts on centreline ends, majority aft
  1 raised mount aft - superfiring
      2 - 4.00" / 102 mm 45.0 cal guns - 32.00lbs / 14.51kg shells, 150 per gun
   Anti-air guns in deck and hoist mount, 1921 Model
   1 x Single mount on centreline, aft deck forward
      8 - 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
   2 x 2 row quad mounts on sides, forward deck aft
      Weight of broadside 512 lbs / 232 kg
      6 - 21.0" / 533 mm, 22.00 ft / 6.71 m torpedoes - 1.425 t each, 8.551 t total
 In 2 sets of deck mounted carriage/fixed tubes

Armour:
   - Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
 Main: 2.00" / 51 mm 1.00" / 25 mm  2.00" / 51 mm

Machinery:
 Oil fired boilers, steam turbines, 
 Geared drive, 2 shafts, 60,696 shp / 45,280 Kw = 37.00 kts
 Range 4,200nm at 14.00 kts
 Bunker at max displacement = 337 tons

Complement:
 174 - 227

Cost:
 £0.771 million / $3.083 million

Distribution of weights at normal displacement:
 Armament: 152 tons, 6.2 %
    - Guns: 143 tons, 5.8 %
    - Torpedoes: 9 tons, 0.3 %
 Armour: 78 tons, 3.2 %
    - Armament: 78 tons, 3.2 %
 Machinery: 1,211 tons, 49.1 %
 Hull, fittings & equipment: 736 tons, 29.9 %
 Fuel, ammunition & stores: 288 tons, 11.7 %
 Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
 Survivability (Non-critical penetrating hits needed to sink ship):
   590 lbs / 267 Kg = 8.9 x 5.1 " / 130 mm shells or 0.3 torpedoes
 Stability (Unstable if below 1.00): 1.09
 Metacentric height 1.3 ft / 0.4 m
 Roll period: 13.5 seconds
 Steadiness - As gun platform (Average = 50 %): 52 %
   - Recoil effect (Restricted arc if above 1.00): 0.83
 Seaboat quality  (Average = 1.00): 1.04

Hull form characteristics:
 Hull has rise forward of midbreak,
   a normal bow and large transom stern
 Block coefficient (normal/deep): 0.408 / 0.417
 Length to Beam Ratio: 11.03 : 1
 'Natural speed' for length: 23.15 kts
 Power going to wave formation at top speed: 67 %
 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: 18.00 %,  26.00 ft / 7.92 m,  24.00 ft / 7.32 m
    - Forward deck: 16.00 %,  24.00 ft / 7.32 m,  23.00 ft / 7.01 m
    - Aft deck: 51.00 %,  15.00 ft / 4.57 m,  15.00 ft / 4.57 m
    - Quarter deck: 15.00 %,  15.00 ft / 4.57 m,  15.00 ft / 4.57 m
    - Average freeboard:  18.12 ft / 5.52 m

Ship space, strength and comments:
 Space - Hull below water (magazines/engines, low = better): 179.6 %
  - Above water (accommodation/working, high = better): 176.4 %
 Waterplane Area: 9,691 Square feet or 900 Square metres
 Displacement factor (Displacement / loading): 70 %
 Structure weight / hull surface area: 38 lbs/sq ft or 187 Kg/sq metre
 Hull strength (Relative):
  - Cross-sectional: 0.43
  - Longitudinal: 2.20
  - Overall: 0.51
 Hull space for machinery, storage, compartmentation is cramped
 Room for accommodation and workspaces is excellent

The Ger/CL1914 light cruiser design

I had decided to build some more conventional light cruisers for the Germans in our war game. These look pretty "German", with three funnels and a short forecastle. Three 5in guns are mounted on the centerline, with one at the rear in superfiring position. Two are on the sides at the rear of the forecastle and four more are on the sides. One pair is between the second and third funnels and the last pair is just forward of the rear superstructure. The ships were designed to carry forty mines on rails. They also have 4-21in TT in single, rotating tubes on the sides. This is the Springsharp report:

Ger/CL/1914, Germany Light Cruiser laid down 1914 (Engine 1927)

Displacement:
 3,006 t light; 3,125 t standard; 3,499 t normal; 3,798 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
 (434.51 ft / 430.00 ft) x 40.00 ft x (16.00 / 16.96 ft)
 (132.44 m / 131.06 m) x 12.19 m  x (4.88 / 5.17 m)

Armament:
      9 - 5.00" / 127 mm 50.0 cal guns - 65.00lbs / 29.48kg shells, 150 per gun
   Quick firing guns in deck and hoist mounts, 1914 Model
   3 x Single mounts on centreline ends, majority aft
  1 raised mount aft - superfiring
   6 x Single mounts on sides, evenly spread
      Weight of broadside 585 lbs / 265 kg
      4 - 21.0" / 533 mm, 21.00 ft / 6.40 m torpedoes - 1.338 t each, 5.352 t total
 In 4 sets of deck mounted side rotating tubes

Armour:
   - Belts:  Width (max) Length (avg)  Height (avg)
 Ends: Unarmoured

   - Torpedo Bulkhead:
  0.50" / 13 mm 300.00 ft / 91.44 m 16.00 ft / 4.88 m

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

   - Protected deck - single deck: 1.00" / 25 mm For and Aft decks

   - Conning towers: Forward 4.00" / 102 mm,  Aft 0.00" / 0 mm

Machinery:
 Oil fired boilers, steam turbines, 
 Geared drive, 2 shafts, 48,853 shp / 36,444 Kw = 32.00 kts
 Range 4,500nm at 16.00 kts
 Bunker at max displacement = 673 tons

Complement:
 226 - 295

Cost:
 £0.474 million / $1.897 million

Distribution of weights at normal displacement:
 Armament: 184 tons, 5.2 %
    - Guns: 178 tons, 5.1 %
    - Torpedoes: 5 tons, 0.2 %
 Armour: 474 tons, 13.6 %
    - Torpedo bulkhead: 89 tons, 2.5 %
    - Armament: 197 tons, 5.6 %
    - Armour Deck: 169 tons, 4.8 %
    - Conning Tower: 20 tons, 0.6 %
 Machinery: 1,460 tons, 41.7 %
 Hull, fittings & equipment: 854 tons, 24.4 %
 Fuel, ammunition & stores: 493 tons, 14.1 %
 Miscellaneous weights: 40 tons, 1.1 %
    - On freeboard deck: 40 tons

Overall survivability and seakeeping ability:
 Survivability (Non-critical penetrating hits needed to sink ship):
   1,140 lbs / 517 Kg = 18.2 x 5.0 " / 127 mm shells or 0.5 torpedoes
 Stability (Unstable if below 1.00): 1.10
 Metacentric height 1.5 ft / 0.5 m
 Roll period: 13.6 seconds
 Steadiness - As gun platform (Average = 50 %): 52 %
   - Recoil effect (Restricted arc if above 1.00): 0.57
 Seaboat quality  (Average = 1.00): 1.03

Hull form characteristics:
 Hull has rise forward of midbreak,
   a normal bow and a round stern
 Block coefficient (normal/deep): 0.445 / 0.456
 Length to Beam Ratio: 10.75 : 1
 'Natural speed' for length: 20.74 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: 1.00 ft / 0.30 m
 Freeboard (% = length of deck as a percentage of waterline length):
    Fore end,  Aft end
    - Forecastle: 18.00 %,  25.00 ft / 7.62 m,  22.00 ft / 6.71 m
    - Forward deck: 14.00 %,  22.00 ft / 6.71 m,  22.00 ft / 6.71 m
    - Aft deck: 53.00 %,  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:  16.78 ft / 5.11 m

Ship space, strength and comments:
 Space - Hull below water (magazines/engines, low = better): 302.7 %
  - Above water (accommodation/working, high = better): 139.5 %
 Waterplane Area: 10,927 Square feet or 1,015 Square metres
 Displacement factor (Displacement / loading): 83 %
 Structure weight / hull surface area: 44 lbs/sq ft or 216 Kg/sq metre
 Hull strength (Relative):
  - Cross-sectional: 0.55
  - Longitudinal: 1.14
  - Overall: 0.59
 Hull space for machinery, storage, compartmentation is extremely poor
 Room for accommodation and workspaces is excellent

A very fast British heavy cruiser

I intended that this be a companion design for the very fast light cruiser that I designed. This is a 37 knot heavy cruiser with 9-8in/55 BLR, 6-4.7in AA, and 24-2pdr AA guns. The belt is 4in, the deck is 2in, and there is a 1in torpedo bulkhead. That makes for a very well-protected ship. I suspect that given how easy this design was, that an even faster ship is possible. This is the Springsharp report:

GB/CA/1921 very fast, Great Britain Heavy Cruiser laid down 1921 (Engine 1950)

Displacement:
 15,751 t light; 16,324 t standard; 17,757 t normal; 18,903 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
 (744.54 ft / 734.00 ft) x 72.00 ft x (21.00 / 22.04 ft)
 (226.94 m / 223.72 m) x 21.95 m  x (6.40 / 6.72 m)

Armament:
      9 - 8.00" / 203 mm 55.0 cal guns - 250.00lbs / 113.40kg shells, 150 per gun
   Breech loading guns in turret on barbette mounts, 1921 Model
   3 x Triple mounts on centreline ends, majority forward
  1 raised mount - superfiring
      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, forward deck aft
      24 - 1.57" / 40.0 mm 45.0 cal guns - 1.97lbs / 0.89kg shells, 150 per gun
   Anti-air guns in deck mounts, 1921 Model
   6 x 2 row quad mounts on sides, aft deck forward
  6 raised mounts
      Weight of broadside 2,611 lbs / 1,185 kg

Armour:
   - Belts:  Width (max) Length (avg)  Height (avg)
 Main: 4.00" / 102 mm 460.00 ft / 140.21 m 12.00 ft / 3.66 m
 Ends: Unarmoured
   Main Belt covers 96 % of normal length
   Main belt does not fully cover magazines and engineering spaces

   - Torpedo Bulkhead:
  1.00" / 25 mm 460.00 ft / 140.21 m 21.00 ft / 6.40 m

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

   - Armoured deck - multiple decks: 2.00" / 51 mm For and Aft decks
 Forecastle: 2.00" / 51 mm  Quarter deck: 2.00" / 51 mm

   - Conning towers: Forward 4.00" / 102 mm,  Aft 0.00" / 0 mm

Machinery:
 Oil fired boilers, steam turbines, 
 Geared drive, 4 shafts, 177,809 shp / 132,646 Kw = 37.00 kts
 Range 7,500nm at 16.00 kts
 Bunker at max displacement = 2,580 tons

Complement:
 768 - 999

Cost:
 £3.729 million / $14.915 million

Distribution of weights at normal displacement:
 Armament: 779 tons, 4.4 %
 Armour: 3,242 tons, 18.3 %
    - Belts: 915 tons, 5.2 %
    - Torpedo bulkhead: 357 tons, 2.0 %
    - Armament: 466 tons, 2.6 %
    - Armour Deck: 1,445 tons, 8.1 %
    - Conning Tower: 59 tons, 0.3 %
 Machinery: 4,254 tons, 24.0 %
 Hull, fittings & equipment: 7,476 tons, 42.1 %
 Fuel, ammunition & stores: 2,006 tons, 11.3 %
 Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
 Survivability (Non-critical penetrating hits needed to sink ship):
   26,675 lbs / 12,099 Kg = 104.2 x 8.0 " / 203 mm shells or 3.1 torpedoes
 Stability (Unstable if below 1.00): 1.10
 Metacentric height 3.7 ft / 1.1 m
 Roll period: 15.8 seconds
 Steadiness - As gun platform (Average = 50 %): 64 %
   - Recoil effect (Restricted arc if above 1.00): 0.50
 Seaboat quality  (Average = 1.00): 1.28

Hull form characteristics:
 Hull has rise forward of midbreak,
   an extended bulbous bow and large transom stern
 Block coefficient (normal/deep): 0.560 / 0.568
 Length to Beam Ratio: 10.19 : 1
 'Natural speed' for length: 30.68 kts
 Power going to wave formation at top speed: 59 %
 Trim (Max stability = 0, Max steadiness = 100): 50
 Bow angle (Positive = bow angles forward): 13.00 degrees
 Stern overhang: 2.00 ft / 0.61 m
 Freeboard (% = length of deck as a percentage of waterline length):
    Fore end,  Aft end
    - Forecastle: 30.00 %,  37.00 ft / 11.28 m,  31.00 ft / 9.45 m
    - Forward deck: 30.00 %,  31.00 ft / 9.45 m,  31.00 ft / 9.45 m
    - Aft deck: 25.00 %,  23.00 ft / 7.01 m,  23.00 ft / 7.01 m
    - Quarter deck: 15.00 %,  23.00 ft / 7.01 m,  23.00 ft / 7.01 m
    - Average freeboard:  28.52 ft / 8.69 m

Ship space, strength and comments:
 Space - Hull below water (magazines/engines, low = better): 130.7 %
  - Above water (accommodation/working, high = better): 263.1 %
 Waterplane Area: 38,768 Square feet or 3,602 Square metres
 Displacement factor (Displacement / loading): 120 %
 Structure weight / hull surface area: 122 lbs/sq ft or 597 Kg/sq metre
 Hull strength (Relative):
  - Cross-sectional: 0.94
  - Longitudinal: 1.84
  - 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

This hardly seems super fast, but it is a 37 knot cruiser

I wanted to see how fast a fairly well-protected cruiser could be. This one is a 37 knot light cruiser that has only 9-6in/55 QF, 6-4.7in AA, and 16-2pdr AA guns. The design does have a torpedo bulkhead and a 2in deck. This is the Springsharp report:

GB/CL/1921 very fast, Great Britain Light Cruiser laid down 1921 (Engine 1950)

Displacement:
 14,253 t light; 14,669 t standard; 15,603 t normal; 16,351 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
 (724.65 ft / 714.00 ft) x 68.00 ft x (19.00 / 19.74 ft)
 (220.87 m / 217.63 m) x 20.73 m  x (5.79 / 6.02 m)

Armament:
      9 - 6.00" / 152 mm 55.0 cal guns - 100.00lbs / 45.36kg shells, 150 per gun
   Quick firing guns in turret on barbette mounts, 1921 Model
   3 x Single mounts on centreline ends, majority forward
  1 raised mount - superfiring
      6 - 4.70" / 119 mm 45.0 cal guns - 52.35lbs / 23.75kg shells, 150 per gun
   Anti-air guns in deck mounts, 1921 Model
   6 x Single mounts on sides, forward deck aft
  6 raised mounts
      16 - 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
   4 x 2 row twin mounts on sides amidships
  4 raised mounts
      Weight of broadside 1,246 lbs / 565 kg

Armour:
   - Belts:  Width (max) Length (avg)  Height (avg)
 Main: 3.00" / 76 mm 480.00 ft / 146.30 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:
  0.80" / 20 mm 480.00 ft / 146.30 m 19.00 ft / 5.79 m

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

   - Armoured deck - multiple decks: 2.00" / 51 mm For and Aft decks
 Forecastle: 2.00" / 51 mm  Quarter deck: 2.00" / 51 mm

   - Conning towers: Forward 4.00" / 102 mm,  Aft 0.00" / 0 mm

Machinery:
 Oil fired boilers, steam turbines, 
 Geared drive, 4 shafts, 193,743 shp / 144,532 Kw = 37.00 kts
 Range 5,400nm at 16.00 kts
 Bunker at max displacement = 1,682 tons

Complement:
 697 - 907

Cost:
 £3.273 million / $13.093 million

Distribution of weights at normal displacement:
 Armament: 430 tons, 2.8 %
 Armour: 2,744 tons, 17.6 %
    - Belts: 706 tons, 4.5 %
    - Torpedo bulkhead: 270 tons, 1.7 %
    - Armament: 400 tons, 2.6 %
    - Armour Deck: 1,314 tons, 8.4 %
    - Conning Tower: 54 tons, 0.3 %
 Machinery: 4,635 tons, 29.7 %
 Hull, fittings & equipment: 6,443 tons, 41.3 %
 Fuel, ammunition & stores: 1,351 tons, 8.7 %
 Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
 Survivability (Non-critical penetrating hits needed to sink ship):
   20,829 lbs / 9,448 Kg = 192.9 x 6.0 " / 152 mm shells or 2.4 torpedoes
 Stability (Unstable if below 1.00): 1.12
 Metacentric height 3.5 ft / 1.1 m
 Roll period: 15.3 seconds
 Steadiness - As gun platform (Average = 50 %): 66 %
   - Recoil effect (Restricted arc if above 1.00): 0.27
 Seaboat quality  (Average = 1.00): 1.32

Hull form characteristics:
 Hull has rise forward of midbreak,
   an extended bulbous bow and a round stern
 Block coefficient (normal/deep): 0.592 / 0.597
 Length to Beam Ratio: 10.50 : 1
 'Natural speed' for length: 26.72 kts
 Power going to wave formation at top speed: 60 %
 Trim (Max stability = 0, Max steadiness = 100): 50
 Bow angle (Positive = bow angles forward): 12.00 degrees
 Stern overhang: 3.00 ft / 0.91 m
 Freeboard (% = length of deck as a percentage of waterline length):
    Fore end,  Aft end
    - Forecastle: 30.00 %,  36.00 ft / 10.97 m,  31.00 ft / 9.45 m
    - Forward deck: 30.00 %,  31.00 ft / 9.45 m,  31.00 ft / 9.45 m
    - Aft deck: 25.00 %,  23.00 ft / 7.01 m,  23.00 ft / 7.01 m
    - Quarter deck: 15.00 %,  23.00 ft / 7.01 m,  23.00 ft / 7.01 m
    - Average freeboard:  28.40 ft / 8.66 m

Ship space, strength and comments:
 Space - Hull below water (magazines/engines, low = better): 148.5 %
  - Above water (accommodation/working, high = better): 263.6 %
 Waterplane Area: 35,245 Square feet or 3,274 Square metres
 Displacement factor (Displacement / loading): 117 %
 Structure weight / hull surface area: 109 lbs/sq ft or 532 Kg/sq metre
 Hull strength (Relative):
  - Cross-sectional: 0.93
  - Longitudinal: 1.93
  - 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

Another Ger/CB/1912 version

Late in the Blue Book, there is another specification for the Ger/CB/1912 design. This version works extremely well in Springsharp 3.0b2 Beta. There are some questions that are unanswered, so I took artistic license to make up the missing pieces. This is what one of the ships looks like:

This is a fast ship with 6-15in guns and a speed of 35 knots, in this version:

Ger/CB/1912, Germany Battlecruiser laid down 1912 (Engine 1941)

Displacement:
 37,864 t light; 39,459 t standard; 41,948 t normal; 43,939 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
 (824.00 ft / 820.00 ft) x 105.00 ft x (29.40 / 30.53 ft)
 (251.16 m / 249.94 m) x 32.00 m  x (8.96 / 9.30 m)

Armament:
      6 - 15.00" / 381 mm 45.0 cal guns - 1,700.00lbs / 771.11kg shells, 120 per gun
   Breech loading guns in turret on barbette mounts, 1912 Model
   2 x Triple mounts on centreline, forward deck forward
  1 raised mount - superfiring
      8 - 6.00" / 152 mm 50.0 cal guns - 114.00lbs / 51.71kg shells, 150 per gun
   Quick firing guns in deck and hoist mounts, 1912 Model
   8 x Single mounts on sides, forward deck aft
  2 raised mounts - superfiring
      Weight of broadside 11,112 lbs / 5,040 kg

Armour:
   - Belts:  Width (max) Length (avg)  Height (avg)
 Main: 6.00" / 152 mm 400.00 ft / 121.92 m 16.00 ft / 4.88 m
 Ends: Unarmoured
   Main Belt covers 75 % 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 29.40 ft / 8.96 m

   - Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
 Main: 10.0" / 254 mm 6.00" / 152 mm  10.0" / 254 mm
 2nd: 4.00" / 102 mm 2.00" / 51 mm  4.00" / 102 mm

   - Armoured deck - multiple decks: 9.00" / 229 mm For and Aft decks

   - Conning towers: Forward 8.00" / 203 mm,  Aft 0.00" / 0 mm

Machinery:
 Oil fired boilers, steam turbines, 
 Direct drive, 4 shafts, 278,113 shp / 207,472 Kw = 35.00 kts
 Range 7,500nm at 16.00 kts
 Bunker at max displacement = 4,479 tons

Complement:
 1,465 - 1,905

Cost:
 £3.402 million / $13.609 million

Distribution of weights at normal displacement:
 Armament: 1,964 tons, 4.7 %
 Armour: 12,459 tons, 29.7 %
    - Belts: 1,730 tons, 4.1 %
    - Torpedo bulkhead: 870 tons, 2.1 %
    - Armament: 1,975 tons, 4.7 %
    - Armour Deck: 7,675 tons, 18.3 %
    - Conning Tower: 208 tons, 0.5 %
 Machinery: 7,350 tons, 17.5 %
 Hull, fittings & equipment: 16,092 tons, 38.4 %
 Fuel, ammunition & stores: 4,084 tons, 9.7 %
 Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
 Survivability (Non-critical penetrating hits needed to sink ship):
   62,710 lbs / 28,445 Kg = 37.2 x 15.0 " / 381 mm shells or 8.0 torpedoes
 Stability (Unstable if below 1.00): 1.23
 Metacentric height 7.8 ft / 2.4 m
 Roll period: 15.7 seconds
 Steadiness - As gun platform (Average = 50 %): 53 %
   - Recoil effect (Restricted arc if above 1.00): 0.45
 Seaboat quality  (Average = 1.00): 1.06

Hull form characteristics:
 Hull has rise forward of midbreak,
   a normal bow and a cruiser stern
 Block coefficient (normal/deep): 0.580 / 0.585
 Length to Beam Ratio: 7.81 : 1
 'Natural speed' for length: 28.64 kts
 Power going to wave formation at top speed: 58 %
 Trim (Max stability = 0, Max steadiness = 100): 50
 Bow angle (Positive = bow angles forward): 0.00 degrees
 Stern overhang: 4.00 ft / 1.22 m
 Freeboard (% = length of deck as a percentage of waterline length):
    Fore end,  Aft end
    - Forecastle: 30.00 %,  37.00 ft / 11.28 m,  32.00 ft / 9.75 m
    - Forward deck: 30.00 %,  32.00 ft / 9.75 m,  31.00 ft / 9.45 m
    - Aft deck: 25.00 %,  23.00 ft / 7.01 m,  23.00 ft / 7.01 m
    - Quarter deck: 15.00 %,  23.00 ft / 7.01 m,  23.00 ft / 7.01 m
    - Average freeboard:  28.85 ft / 8.79 m

Ship space, strength and comments:
 Space - Hull below water (magazines/engines, low = better): 99.1 %
  - Above water (accommodation/working, high = better): 222.1 %
 Waterplane Area: 61,804 Square feet or 5,742 Square metres
 Displacement factor (Displacement / loading): 113 %
 Structure weight / hull surface area: 188 lbs/sq ft or 919 Kg/sq metre
 Hull strength (Relative):
  - Cross-sectional: 0.96
  - Longitudinal: 1.51
  - Overall: 1.00
 Hull space for machinery, storage, compartmentation is adequate
 Room for accommodation and workspaces is excellent

A Hood-like Super Lion

If we were building Super Lion battlecruiser, then our emergency war program for 1915 should include such a ship, albeit one that is Hood-like. I wanted 10-15in/42, 16-5.5in QF, an 8 inch belt, and 33 knots of speed. This is such a ship:

GB/CB/1915 Super Lion, Great Britain Battlecruiser laid down 1915 (Engine 1919)

Displacement:
 42,088 t light; 44,118 t standard; 47,086 t normal; 49,460 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
 (860.06 ft / 855.00 ft) x 105.00 ft x (29.00 / 30.23 ft)
 (262.15 m / 260.60 m) x 32.00 m  x (8.84 / 9.21 m)

Armament:
      10 - 15.00" / 381 mm 42.0 cal guns - 1,950.00lbs / 884.51kg shells, 90 per gun
   Breech loading guns in turret on barbette mounts, 1915 Model
   4 x Twin mounts on centreline ends, evenly spread
  2 raised mounts - superfiring
   1 x Twin mount on centreline, aft deck forward
      16 - 5.50" / 140 mm 50.0 cal guns - 85.00lbs / 38.56kg shells, 150 per gun
   Quick firing guns in deck and hoist mount, 1915 Model
   1 x Single mount on sides amidships
  4 raised mounts
      Weight of broadside 20,860 lbs / 9,462 kg

Armour:
   - Belts:  Width (max) Length (avg)  Height (avg)
 Main: 8.00" / 203 mm 535.00 ft / 163.07 m 9.00 ft / 2.74 m
 Ends: 4.00" / 102 mm 320.00 ft / 97.54 m 12.00 ft / 3.66 m
 Upper: 5.00" / 127 mm 535.00 ft / 163.07 m 9.00 ft / 2.74 m
   Main Belt covers 96 % of normal length
   Main belt does not fully cover magazines and engineering spaces

   - Torpedo Bulkhead:
  2.00" / 51 mm 535.00 ft / 163.07 m 29.00 ft / 8.84 m

   - Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
 Main: 10.0" / 254 mm 7.00" / 178 mm  10.0" / 254 mm
 2nd: 5.00" / 127 mm 3.00" / 76 mm  5.00" / 127 mm

   - Armoured deck - multiple decks: 3.00" / 76 mm For and Aft decks
 Forecastle: 3.00" / 76 mm  Quarter deck: 3.00" / 76 mm

   - Conning towers: Forward 10.00" / 254 mm,  Aft 0.00" / 0 mm

Machinery:
 Oil fired boilers, steam turbines, 
 Geared drive, 4 shafts, 235,775 shp / 175,888 Kw = 33.00 kts
 Range 6,500nm at 16.00 kts
 Bunker at max displacement = 5,341 tons

Complement:
 1,597 - 2,077

Cost:
 £6.135 million / $24.539 million

Distribution of weights at normal displacement:
 Armament: 2,953 tons, 6.3 %
 Armour: 11,629 tons, 24.7 %
    - Belts: 3,234 tons, 6.9 %
    - Torpedo bulkhead: 1,148 tons, 2.4 %
    - Armament: 3,181 tons, 6.8 %
    - Armour Deck: 3,785 tons, 8.0 %
    - Conning Tower: 281 tons, 0.6 %
 Machinery: 8,373 tons, 17.8 %
 Hull, fittings & equipment: 19,133 tons, 40.6 %
 Fuel, ammunition & stores: 4,998 tons, 10.6 %
 Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
 Survivability (Non-critical penetrating hits needed to sink ship):
   61,615 lbs / 27,948 Kg = 36.5 x 15.0 " / 381 mm shells or 7.5 torpedoes
 Stability (Unstable if below 1.00): 1.15
 Metacentric height 7.0 ft / 2.1 m
 Roll period: 16.6 seconds
 Steadiness - As gun platform (Average = 50 %): 53 %
   - Recoil effect (Restricted arc if above 1.00): 0.89
 Seaboat quality  (Average = 1.00): 1.06

Hull form characteristics:
 Hull has rise forward of midbreak,
   a normal bow and a cruiser stern
 Block coefficient (normal/deep): 0.633 / 0.638
 Length to Beam Ratio: 8.14 : 1
 'Natural speed' for length: 29.24 kts
 Power going to wave formation at top speed: 55 %
 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: 30.00 %,  36.00 ft / 10.97 m,  30.00 ft / 9.14 m
    - Forward deck: 42.00 %,  30.00 ft / 9.14 m,  30.00 ft / 9.14 m
    - Aft deck: 13.00 %,  22.00 ft / 6.71 m,  22.00 ft / 6.71 m
    - Quarter deck: 15.00 %,  22.00 ft / 6.71 m,  22.00 ft / 6.71 m
    - Average freeboard:  28.48 ft / 8.68 m

Ship space, strength and comments:
 Space - Hull below water (magazines/engines, low = better): 109.2 %
  - Above water (accommodation/working, high = better): 227.0 %
 Waterplane Area: 67,705 Square feet or 6,290 Square metres
 Displacement factor (Displacement / loading): 109 %
 Structure weight / hull surface area: 210 lbs/sq ft or 1,026 Kg/sq metre
 Hull strength (Relative):
  - Cross-sectional: 0.98
  - Longitudinal: 1.24
  - Overall: 1.00
 Hull space for machinery, storage, compartmentation is adequate
 Room for accommodation and workspaces is excellent

The long version of my Super Lion design from yesterday

In my specification for the Super Lion version that I designed yesterday, there was an alternate set of dimensions for a longer and narrower version: 814ft x 95ft x 28ft. I already knew, last night, that I wanted to try that version today:

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

Displacement:
 30,659 t light; 33,045 t standard; 36,376 t normal; 39,041 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
 (821.00 ft / 814.00 ft) x 95.00 ft x (28.00 / 29.67 ft)
 (250.24 m / 248.11 m) x 28.96 m  x (8.53 / 9.04 m)

Armament:
      10 - 15.00" / 381 mm 42.0 cal guns - 1,950.00lbs / 884.51kg shells, 150 per gun
   Breech loading guns in turret on barbette mounts, 1912 Model
   4 x Single mounts on centreline ends, evenly spread
  2 raised mounts - superfiring
   1 x Twin mount on centreline, aft deck forward
      12 - 4.00" / 102 mm 50.0 cal guns - 33.88lbs / 15.37kg shells, 150 per gun
   Quick firing guns in deck and hoist mounts, 1912 Model
   6 x Twin mounts on sides, forward deck aft
      Weight of broadside 19,907 lbs / 9,029 kg

Armour:
   - Belts:  Width (max) Length (avg)  Height (avg)
 Main: 6.00" / 152 mm 530.00 ft / 161.54 m 9.00 ft / 2.74 m
 Ends: 4.00" / 102 mm 220.00 ft / 67.06 m 9.00 ft / 2.74 m
   64.00 ft / 19.51 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 530.00 ft / 161.54 m 28.00 ft / 8.53 m

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

   - Protected deck - multiple decks: 3.00" / 76 mm For and Aft decks
 Forecastle: 3.00" / 76 mm  Quarter deck: 3.00" / 76 mm

   - Conning towers: Forward 8.00" / 203 mm,  Aft 0.00" / 0 mm

Machinery:
 Oil fired boilers, steam turbines, 
 Direct drive, 4 shafts, 136,470 shp / 101,807 Kw = 30.00 kts
 Range 6,700nm at 16.00 kts
 Bunker at max displacement = 5,995 tons

Complement:
 1,316 - 1,712

Cost:
 £3.302 million / $13.210 million

Distribution of weights at normal displacement:
 Armament: 3,085 tons, 8.5 %
 Armour: 7,796 tons, 21.4 %
    - Belts: 1,494 tons, 4.1 %
    - Torpedo bulkhead: 824 tons, 2.3 %
    - Armament: 2,164 tons, 5.9 %
    - Armour Deck: 3,125 tons, 8.6 %
    - Conning Tower: 189 tons, 0.5 %
 Machinery: 5,441 tons, 15.0 %
 Hull, fittings & equipment: 14,337 tons, 39.4 %
 Fuel, ammunition & stores: 5,717 tons, 15.7 %
 Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
 Survivability (Non-critical penetrating hits needed to sink ship):
   45,700 lbs / 20,729 Kg = 27.1 x 15.0 " / 381 mm shells or 5.7 torpedoes
 Stability (Unstable if below 1.00): 1.20
 Metacentric height 6.5 ft / 2.0 m
 Roll period: 15.7 seconds
 Steadiness - As gun platform (Average = 50 %): 56 %
   - Recoil effect (Restricted arc if above 1.00): 0.95
 Seaboat quality  (Average = 1.00): 1.19

Hull form characteristics:
 Hull has rise forward of midbreak,
   a ram bow and a cruiser stern
 Block coefficient (normal/deep): 0.588 / 0.596
 Length to Beam Ratio: 8.57 : 1
 'Natural speed' for length: 28.53 kts
 Power going to wave formation at top speed: 49 %
 Trim (Max stability = 0, Max steadiness = 100): 47
 Bow angle (Positive = bow angles forward): -2.00 degrees
 Stern overhang: -3.00 ft / -0.91 m
 Freeboard (% = length of deck as a percentage of waterline length):
    Fore end,  Aft end
    - Forecastle: 36.00 %,  28.00 ft / 8.53 m,  25.00 ft / 7.62 m
    - Forward deck: 36.00 %,  25.00 ft / 7.62 m,  25.00 ft / 7.62 m
    - Aft deck: 13.00 %,  17.00 ft / 5.18 m,  17.00 ft / 5.18 m
    - Quarter deck: 15.00 %,  17.00 ft / 5.18 m,  17.00 ft / 5.18 m
    - Average freeboard:  23.19 ft / 7.07 m
 Ship tends to be wet forward

Ship space, strength and comments:
 Space - Hull below water (magazines/engines, low = better): 110.7 %
  - Above water (accommodation/working, high = better): 185.2 %
 Waterplane Area: 55,926 Square feet or 5,196 Square metres
 Displacement factor (Displacement / loading): 111 %
 Structure weight / hull surface area: 197 lbs/sq ft or 964 Kg/sq metre
 Hull strength (Relative):
  - Cross-sectional: 0.99
  - Longitudinal: 1.11
  - Overall: 1.00
 Hull space for machinery, storage, compartmentation is adequate
 Room for accommodation and workspaces is excellent

A small "Super Lion" (GB/CB/1912)

I have this small Super Lion specification from the early 1970's:

"Super Lion"  10-15in/42  12-4in QF
SHP=120,000   14 SHP/ton 

Displacement = 33,710 tons
Dimensions = 750ft x 100ft x 28.9ft

Armament      =  2,210 tons 
Machinery     =  8,570 tons
Miscellaneous =  3,000 tons
Hull          = 13,930 tons
Protection    =  6,000 tons

This is my actual Springsharp report:

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

Displacement:
 30,539 t light; 32,922 t standard; 36,228 t normal; 38,873 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
 (757.00 ft / 750.00 ft) x 100.00 ft x (28.90 / 30.61 ft)
 (230.73 m / 228.60 m) x 30.48 m  x (8.81 / 9.33 m)

Armament:
      10 - 15.00" / 381 mm 42.0 cal guns - 1,950.00lbs / 884.51kg shells, 150 per gun
   Breech loading guns in turret on barbette mounts, 1912 Model
   4 x Single mounts on centreline ends, evenly spread
  2 raised mounts - superfiring
   1 x Twin mount on centreline, aft deck forward
      12 - 4.00" / 102 mm 50.0 cal guns - 33.88lbs / 15.37kg shells, 150 per gun
   Quick firing guns in deck and hoist mounts, 1912 Model
   6 x Twin mounts on sides, forward deck aft
      Weight of broadside 19,907 lbs / 9,029 kg

Armour:
   - Belts:  Width (max) Length (avg)  Height (avg)
 Main: 6.00" / 152 mm 530.00 ft / 161.54 m 9.00 ft / 2.74 m
 Ends: 4.00" / 102 mm 220.00 ft / 67.06 m 9.00 ft / 2.74 m
   Main Belt covers 109 % of normal length
   Main belt does not fully cover magazines and engineering spaces

   - Torpedo Bulkhead:
  1.50" / 38 mm 530.00 ft / 161.54 m 28.90 ft / 8.81 m

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

   - Protected deck - multiple decks: 3.00" / 76 mm For and Aft decks
 Forecastle: 3.00" / 76 mm  Quarter deck: 3.00" / 76 mm

   - Conning towers: Forward 8.00" / 203 mm,  Aft 0.00" / 0 mm

Machinery:
 Oil fired boilers, steam turbines, 
 Direct drive, 4 shafts, 142,243 shp / 106,113 Kw = 30.00 kts
 Range 6,700nm at 16.00 kts
 Bunker at max displacement = 5,951 tons

Complement:
 1,312 - 1,706

Cost:
 £3.330 million / $13.322 million

Distribution of weights at normal displacement:
 Armament: 3,085 tons, 8.5 %
 Armour: 7,792 tons, 21.5 %
    - Belts: 1,494 tons, 4.1 %
    - Torpedo bulkhead: 850 tons, 2.3 %
    - Armament: 2,237 tons, 6.2 %
    - Armour Deck: 3,023 tons, 8.3 %
    - Conning Tower: 189 tons, 0.5 %
 Machinery: 5,672 tons, 15.7 %
 Hull, fittings & equipment: 13,991 tons, 38.6 %
 Fuel, ammunition & stores: 5,689 tons, 15.7 %
 Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
 Survivability (Non-critical penetrating hits needed to sink ship):
   45,165 lbs / 20,486 Kg = 26.8 x 15.0 " / 381 mm shells or 5.7 torpedoes
 Stability (Unstable if below 1.00): 1.23
 Metacentric height 7.3 ft / 2.2 m
 Roll period: 15.5 seconds
 Steadiness - As gun platform (Average = 50 %): 55 %
   - Recoil effect (Restricted arc if above 1.00): 0.83
 Seaboat quality  (Average = 1.00): 1.11

Hull form characteristics:
 Hull has rise forward of midbreak,
   a ram bow and a cruiser stern
 Block coefficient (normal/deep): 0.585 / 0.593
 Length to Beam Ratio: 7.50 : 1
 'Natural speed' for length: 27.39 kts
 Power going to wave formation at top speed: 53 %
 Trim (Max stability = 0, Max steadiness = 100): 50
 Bow angle (Positive = bow angles forward): -2.00 degrees
 Stern overhang: -3.00 ft / -0.91 m
 Freeboard (% = length of deck as a percentage of waterline length):
    Fore end,  Aft end
    - Forecastle: 36.00 %,  27.00 ft / 8.23 m,  26.00 ft / 7.92 m
    - Forward deck: 36.00 %,  26.00 ft / 7.92 m,  26.00 ft / 7.92 m
    - Aft deck: 13.00 %,  18.00 ft / 5.49 m,  18.00 ft / 5.49 m
    - Quarter deck: 15.00 %,  18.00 ft / 5.49 m,  18.00 ft / 5.49 m
    - Average freeboard:  23.90 ft / 7.29 m
 Ship tends to be wet forward

Ship space, strength and comments:
 Space - Hull below water (magazines/engines, low = better): 112.2 %
  - Above water (accommodation/working, high = better): 187.5 %
 Waterplane Area: 54,089 Square feet or 5,025 Square metres
 Displacement factor (Displacement / loading): 109 %
 Structure weight / hull surface area: 201 lbs/sq ft or 982 Kg/sq metre
 Hull strength (Relative):
  - Cross-sectional: 0.97
  - Longitudinal: 1.36
  - Overall: 1.00
 Hull space for machinery, storage, compartmentation is cramped
 Room for accommodation and workspaces is excellent

It takes a big ship: the GB/BB/1905 Battleship-Cruiser

This is a design study for a 1905 British battleship-cruiser (or fast battleship). I had decided that I wanted an armament with 10-12in/45 and 12-6in QF guns with an armour basis of 11in. That, with a 25 knot speed means a larger ship. Still, the displacement is not too out of hand. As you would hope, this is a smaller ship than a Queen Elizabeth class ship from 1912. I am going with the anachronistic all oil fuel in 1905, so that is open for debate. Otherwise, the design is pretty straight forward, although it depends on lightweight machinery. This is the Springsharp report:

GB/BB/1905, Great Britain Battleship-Cruiser laid down 1905 (Engine 1909)

Displacement:
 22,961 t light; 24,321 t standard; 26,272 t normal; 27,832 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
 (641.00 ft / 634.00 ft) x 89.00 ft x (28.00 / 29.35 ft)
 (195.38 m / 193.24 m) x 27.13 m  x (8.53 / 8.94 m)

Armament:
      10 - 12.00" / 305 mm 45.0 cal guns - 871.37lbs / 395.24kg shells, 150 per gun
   Breech loading guns in turret on barbette mounts, 1905 Model
   4 x Twin mounts on centreline ends, evenly spread
  2 raised mounts - superfiring
   1 x Twin mount on centreline, aft deck forward
      12 - 6.00" / 152 mm 45.0 cal guns - 108.92lbs / 49.41kg shells, 150 per gun
   Quick firing guns in casemate mounts, 1905 Model
   8 x Single mounts on sides, forward deck aft
   4 x Single mounts on sides, aft evenly spread
      Weight of broadside 10,021 lbs / 4,545 kg

Armour:
   - Belts:  Width (max) Length (avg)  Height (avg)
 Main: 11.0" / 279 mm 430.00 ft / 131.06 m 8.00 ft / 2.44 m
 Ends: 4.00" / 102 mm 200.00 ft / 60.96 m 12.00 ft / 3.66 m
   4.00 ft / 1.22 m Unarmoured ends
 Upper: 9.00" / 229 mm 430.00 ft / 131.06 m 8.00 ft / 2.44 m
   Main Belt covers 104 % of normal length

   - Torpedo Bulkhead:
  2.00" / 51 mm 390.00 ft / 118.87 m 28.00 ft / 8.53 m

   - Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
 Main: 11.0" / 279 mm 8.00" / 203 mm  11.0" / 279 mm
 2nd: 6.00" / 152 mm 5.00" / 127 mm  5.00" / 127 mm

   - Protected deck - multiple decks: 3.00" / 76 mm For and Aft decks
 Forecastle: 3.00" / 76 mm  Quarter deck: 3.00" / 76 mm

   - Conning towers: Forward 11.00" / 279 mm,  Aft 0.00" / 0 mm

Machinery:
 Oil fired boilers, steam turbines, 
 Direct drive, 4 shafts, 60,472 shp / 45,112 Kw = 25.00 kts
 Range 5,600nm at 14.00 kts
 Bunker at max displacement = 3,511 tons

Complement:
 1,031 - 1,341

Cost:
 £2.064 million / $8.254 million

Distribution of weights at normal displacement:
 Armament: 1,771 tons, 6.7 %
 Armour: 9,297 tons, 35.4 %
    - Belts: 3,283 tons, 12.5 %
    - Torpedo bulkhead: 808 tons, 3.1 %
    - Armament: 2,726 tons, 10.4 %
    - Armour Deck: 2,270 tons, 8.6 %
    - Conning Tower: 209 tons, 0.8 %
 Machinery: 2,749 tons, 10.5 %
 Hull, fittings & equipment: 9,144 tons, 34.8 %
 Fuel, ammunition & stores: 3,311 tons, 12.6 %
 Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
 Survivability (Non-critical penetrating hits needed to sink ship):
   41,765 lbs / 18,944 Kg = 48.3 x 12.0 " / 305 mm shells or 6.8 torpedoes
 Stability (Unstable if below 1.00): 1.10
 Metacentric height 5.0 ft / 1.5 m
 Roll period: 16.6 seconds
 Steadiness - As gun platform (Average = 50 %): 76 %
   - Recoil effect (Restricted arc if above 1.00): 0.79
 Seaboat quality  (Average = 1.00): 1.52

Hull form characteristics:
 Hull has rise forward of midbreak,
   a ram bow and a cruiser stern
 Block coefficient (normal/deep): 0.582 / 0.588
 Length to Beam Ratio: 7.12 : 1
 'Natural speed' for length: 25.18 kts
 Power going to wave formation at top speed: 49 %
 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: 25.00 %,  29.00 ft / 8.84 m,  29.00 ft / 8.84 m
    - Forward deck: 12.00 %,  29.00 ft / 8.84 m,  29.00 ft / 8.84 m
    - Aft deck: 48.00 %,  21.00 ft / 6.40 m,  21.00 ft / 6.40 m
    - Quarter deck: 15.00 %,  21.00 ft / 6.40 m,  21.00 ft / 6.40 m
    - Average freeboard:  23.96 ft / 7.30 m

Ship space, strength and comments:
 Space - Hull below water (magazines/engines, low = better): 85.0 %
  - Above water (accommodation/working, high = better): 169.4 %
 Waterplane Area: 40,579 Square feet or 3,770 Square metres
 Displacement factor (Displacement / loading): 114 %
 Structure weight / hull surface area: 165 lbs/sq ft or 806 Kg/sq metre
 Hull strength (Relative):
  - Cross-sectional: 0.95
  - Longitudinal: 1.64
  - 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

The 1903 Battleship-Cruiser with superfiring guns

I was looking at my photo of the GB/BB/1903 battleship-cruiser and was dissatisfied with the version that had guns in echelon. I decided to see what could be done with superfiring turrets. I did slightly lengthen the ship as well as change the gun layout. The result was very much to my liking:

GB/BB/1903, Great Britain Battleship-Cruiser laid down 1903 (Engine 1908)

Displacement:
 21,737 t light; 22,682 t standard; 25,251 t normal; 27,307 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
 (593.00 ft / 585.00 ft) x 82.00 ft x (28.00 / 29.94 ft)
 (180.75 m / 178.31 m) x 24.99 m  x (8.53 / 9.13 m)

Armament:
      8 - 12.00" / 305 mm 45.0 cal guns - 850.00lbs / 385.55kg shells, 90 per gun
   Breech loading guns in turret on barbette mounts, 1903 Model
   4 x Twin mounts on centreline ends, evenly spread
  2 raised mounts - superfiring
      12 - 6.00" / 152 mm 45.0 cal guns - 100.00lbs / 45.36kg shells, 150 per gun
   Quick firing guns in casemate mounts, 1903 Model
   6 x Single mounts on sides, forward deck aft
   6 x Single mounts on sides, aft deck forward
      Weight of broadside 8,000 lbs / 3,629 kg

Armour:
   - Belts:  Width (max) Length (avg)  Height (avg)
 Main: 11.0" / 279 mm 380.00 ft / 115.82 m 8.00 ft / 2.44 m
 Ends: 4.00" / 102 mm 120.00 ft / 36.58 m 12.00 ft / 3.66 m
   85.00 ft / 25.91 m Unarmoured ends
 Upper: 8.00" / 203 mm 380.00 ft / 115.82 m 8.00 ft / 2.44 m
   Main Belt covers 100 % of normal length
   Main belt does not fully cover magazines and engineering spaces

   - Torpedo Bulkhead:
  2.00" / 51 mm 380.00 ft / 115.82 m 26.00 ft / 7.92 m

   - Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
 Main: 11.0" / 279 mm 8.00" / 203 mm  11.0" / 279 mm
 2nd: 5.00" / 127 mm 4.00" / 102 mm  5.00" / 127 mm

   - Protected deck - single deck: 3.00" / 76 mm For and Aft decks
 Forecastle: 3.00" / 76 mm  Quarter deck: 3.00" / 76 mm

   - Conning towers: Forward 11.00" / 279 mm,  Aft 0.00" / 0 mm

Machinery:
 Coal fired boilers, complex reciprocating steam engines, 
 Direct drive, 4 shafts, 52,999 ihp / 39,537 Kw = 24.00 kts
 Range 5,600nm at 14.00 kts
 Bunker at max displacement = 4,625 tons (100% coal)

Complement:
 1,001 - 1,302

Cost:
 £2.148 million / $8.591 million

Distribution of weights at normal displacement:
 Armament: 1,462 tons, 5.8 %
 Armour: 7,770 tons, 30.8 %
    - Belts: 2,712 tons, 10.7 %
    - Torpedo bulkhead: 731 tons, 2.9 %
    - Armament: 2,053 tons, 8.1 %
    - Armour Deck: 2,070 tons, 8.2 %
    - Conning Tower: 204 tons, 0.8 %
 Machinery: 4,818 tons, 19.1 %
 Hull, fittings & equipment: 7,687 tons, 30.4 %
 Fuel, ammunition & stores: 3,515 tons, 13.9 %
 Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
 Survivability (Non-critical penetrating hits needed to sink ship):
   29,490 lbs / 13,376 Kg = 34.1 x 12.0 " / 305 mm shells or 4.0 torpedoes
 Stability (Unstable if below 1.00): 1.15
 Metacentric height 4.8 ft / 1.5 m
 Roll period: 15.7 seconds
 Steadiness - As gun platform (Average = 50 %): 68 %
   - Recoil effect (Restricted arc if above 1.00): 0.73
 Seaboat quality  (Average = 1.00): 1.36

Hull form characteristics:
 Hull has rise forward of midbreak,
   a ram bow and a cruiser stern
 Block coefficient (normal/deep): 0.658 / 0.665
 Length to Beam Ratio: 7.13 : 1
 'Natural speed' for length: 24.19 kts
 Power going to wave formation at top speed: 51 %
 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: 30.00 %,  25.00 ft / 7.62 m,  25.00 ft / 7.62 m
    - Forward deck: 33.00 %,  25.00 ft / 7.62 m,  25.00 ft / 7.62 m
    - Aft deck: 22.00 %,  17.00 ft / 5.18 m,  17.00 ft / 5.18 m
    - Quarter deck: 15.00 %,  17.00 ft / 5.18 m,  17.00 ft / 5.18 m
    - Average freeboard:  22.04 ft / 6.72 m
 Ship tends to be wet forward

Ship space, strength and comments:
 Space - Hull below water (magazines/engines, low = better): 116.0 %
  - Above water (accommodation/working, high = better): 153.6 %
 Waterplane Area: 37,018 Square feet or 3,439 Square metres
 Displacement factor (Displacement / loading): 104 %
 Structure weight / hull surface area: 152 lbs/sq ft or 743 Kg/sq metre
 Hull strength (Relative):
  - Cross-sectional: 0.96
  - Longitudinal: 1.52
  - 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

An "Unlimited" Italian light cruiser

I decided to see what could be done with a fast Italian light cruiser, using the Springsharp we have now. I increased the size and length to see how fast the ship could be. Without too much trouble, I was able to achieve 39 knots, with an armament of 9-5.3in/45 DP, 8-37mm AA guns, and 8-21in TT in two mounts. The size necessarily ballooned. I did a second version with a wide transom stern, and that made a big difference. This is the Springsharp report:

It/CL/1939 fast design study, Italy Light Cruiser laid down 1939 (Engine 1950)

Displacement:
 6,796 t light; 7,014 t standard; 7,447 t normal; 7,793 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
 (625.97 ft / 614.00 ft) x 56.00 ft x (20.00 / 20.56 ft)
 (190.79 m / 187.15 m) x 17.07 m  x (6.10 / 6.27 m)

Armament:
      9 - 5.30" / 135 mm 45.0 cal guns - 75.00lbs / 34.02kg shells, 150 per gun
   Dual purpose guns in turret on barbette mounts, 1939 Model
   3 x Triple mounts on centreline ends, majority forward
  1 raised mount - superfiring
      8 - 1.46" / 37.0 mm 55.0 cal guns - 1.67lbs / 0.76kg shells, 150 per gun
   Anti-air guns in deck mounts, 1939 Model
   8 x Single mounts on sides, evenly spread
  8 raised mounts
      Weight of broadside 688 lbs / 312 kg
      8 - 21.0" / 533 mm, 21.00 ft / 6.40 m torpedoes - 1.438 t each, 11.504 t total
 In 2 sets of deck mounted side rotating tubes

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

   - Armoured deck - multiple decks: 0.70" / 18 mm For and Aft decks

   - Conning towers: Forward 1.00" / 25 mm,  Aft 0.00" / 0 mm

Machinery:
 Oil fired boilers, steam turbines, 
 Geared drive, 4 shafts, 122,654 shp / 91,500 Kw = 39.00 kts
 Range 4,200nm at 15.00 kts
 Bunker at max displacement = 779 tons

Complement:
 400 - 521

Cost:
 £4.154 million / $16.615 million

Distribution of weights at normal displacement:
 Armament: 181 tons, 2.4 %
    - Guns: 170 tons, 2.3 %
    - Torpedoes: 12 tons, 0.2 %
 Armour: 291 tons, 3.9 %
    - Armament: 64 tons, 0.9 %
    - Armour Deck: 219 tons, 2.9 %
    - Conning Tower: 8 tons, 0.1 %
 Machinery: 2,934 tons, 39.4 %
 Hull, fittings & equipment: 3,389 tons, 45.5 %
 Fuel, ammunition & stores: 651 tons, 8.7 %
 Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
 Survivability (Non-critical penetrating hits needed to sink ship):
   5,758 lbs / 2,612 Kg = 77.4 x 5.3 " / 135 mm shells or 0.9 torpedoes
 Stability (Unstable if below 1.00): 1.21
 Metacentric height 3.0 ft / 0.9 m
 Roll period: 13.6 seconds
 Steadiness - As gun platform (Average = 50 %): 51 %
   - Recoil effect (Restricted arc if above 1.00): 0.23
 Seaboat quality  (Average = 1.00): 1.02

Hull form characteristics:
 Hull has a flush deck,
   an extended bulbous bow and large transom stern
 Block coefficient (normal/deep): 0.379 / 0.386
 Length to Beam Ratio: 10.96 : 1
 'Natural speed' for length: 28.54 kts
 Power going to wave formation at top speed: 59 %
 Trim (Max stability = 0, Max steadiness = 100): 50
 Bow angle (Positive = bow angles forward): 15.00 degrees
 Stern overhang: 5.00 ft / 1.52 m
 Freeboard (% = length of deck as a percentage of waterline length):
    Fore end,  Aft end
    - Forecastle: 25.00 %,  26.00 ft / 7.92 m,  21.00 ft / 6.40 m
    - Forward deck: 30.00 %,  21.00 ft / 6.40 m,  19.00 ft / 5.79 m
    - Aft deck: 30.00 %,  19.00 ft / 5.79 m,  18.00 ft / 5.49 m
    - Quarter deck: 15.00 %,  18.00 ft / 5.49 m,  18.00 ft / 5.49 m
    - Average freeboard:  20.00 ft / 6.10 m
 Ship tends to be wet forward

Ship space, strength and comments:
 Space - Hull below water (magazines/engines, low = better): 135.8 %
  - Above water (accommodation/working, high = better): 194.1 %
 Waterplane Area: 21,671 Square feet or 2,013 Square metres
 Displacement factor (Displacement / loading): 110 %
 Structure weight / hull surface area: 95 lbs/sq ft or 465 Kg/sq metre
 Hull strength (Relative):
  - Cross-sectional: 0.94
  - Longitudinal: 1.70
  - Overall: 1.00
 Hull space for machinery, storage, compartmentation is cramped
 Room for accommodation and workspaces is excellent

An attempt at a faster Italian light cruiser: It/CL/1939 Fast

We will have trouble doing too much better than this with the current version of Springsharp 3.0b2 Beta. There may actually be two issues at work, not just the machinery weight. The other is the formula used to calculate power for a hull model to make a given speed. I have suspected that for smaller ships, what Springsharp is currently using requires too much power for a given speed. I base that on comparisons with real ships. We know, for example, that the Italian Capitani Romani class ships could make 41 knots on trials. I had to warp the design to get 35 knots:

It/CL/1939 fast, Italy Light Cruiser laid down 1939 (Engine 1950)

Displacement:
 4,381 t light; 4,542 t standard; 4,917 t normal; 5,217 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
 (470.62 ft / 462.50 ft) x 47.25 ft x (17.50 / 18.25 ft)
 (143.44 m / 140.97 m) x 14.40 m  x (5.33 / 5.56 m)

Armament:
      8 - 5.30" / 135 mm 45.0 cal guns - 75.07lbs / 34.05kg shells, 150 per gun
   Dual purpose guns in turret on barbette mounts, 1939 Model
   4 x Single mounts on centreline ends, evenly spread
      8 - 1.46" / 37.0 mm 55.0 cal guns - 1.67lbs / 0.76kg shells, 150 per gun
   Breech loading guns in deck mounts, 1939 Model
   8 x Single mounts on sides, evenly spread
  8 raised mounts
      Weight of broadside 614 lbs / 278 kg
      8 - 21.0" / 533 mm, 21.00 ft / 6.40 m torpedoes - 1.438 t each, 11.504 t total
 In 2 sets of deck mounted carriage/fixed tubes

Armour:
   - Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
 Main: 0.70" / 18 mm 0.70" / 18 mm  0.70" / 18 mm

   - Conning towers: Forward 0.70" / 18 mm,  Aft 0.00" / 0 mm

Machinery:
 Oil fired boilers, steam turbines, 
 Geared drive, 2 shafts, 86,370 shp / 64,432 Kw = 35.00 kts
 Range 4,500nm at 16.00 kts
 Bunker at max displacement = 676 tons

Complement:
 293 - 381

Cost:
 £2.913 million / $11.653 million

Distribution of weights at normal displacement:
 Armament: 200 tons, 4.1 %
    - Guns: 189 tons, 3.8 %
    - Torpedoes: 12 tons, 0.2 %
 Armour: 53 tons, 1.1 %
    - Armament: 49 tons, 1.0 %
    - Conning Tower: 4 tons, 0.1 %
 Machinery: 2,066 tons, 42.0 %
 Hull, fittings & equipment: 2,061 tons, 41.9 %
 Fuel, ammunition & stores: 536 tons, 10.9 %
 Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
 Survivability (Non-critical penetrating hits needed to sink ship):
   3,131 lbs / 1,420 Kg = 42.1 x 5.3 " / 135 mm shells or 0.7 torpedoes
 Stability (Unstable if below 1.00): 1.19
 Metacentric height 2.3 ft / 0.7 m
 Roll period: 13.2 seconds
 Steadiness - As gun platform (Average = 50 %): 53 %
   - Recoil effect (Restricted arc if above 1.00): 0.34
 Seaboat quality  (Average = 1.00): 1.03

Hull form characteristics:
 Hull has a flush deck,
   a normal bow and a round stern
 Block coefficient (normal/deep): 0.450 / 0.458
 Length to Beam Ratio: 9.79 : 1
 'Natural speed' for length: 21.51 kts
 Power going to wave formation at top speed: 65 %
 Trim (Max stability = 0, Max steadiness = 100): 51
 Bow angle (Positive = bow angles forward): 9.00 degrees
 Stern overhang: 4.00 ft / 1.22 m
 Freeboard (% = length of deck as a percentage of waterline length):
    Fore end,  Aft end
    - Forecastle: 22.00 %,  26.00 ft / 7.92 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: 33.00 %,  18.00 ft / 5.49 m,  18.00 ft / 5.49 m
    - Quarter deck: 15.00 %,  18.00 ft / 5.49 m,  18.00 ft / 5.49 m
    - Average freeboard:  19.55 ft / 5.96 m

Ship space, strength and comments:
 Space - Hull below water (magazines/engines, low = better): 146.9 %
  - Above water (accommodation/working, high = better): 166.0 %
 Waterplane Area: 13,939 Square feet or 1,295 Square metres
 Displacement factor (Displacement / loading): 104 %
 Structure weight / hull surface area: 81 lbs/sq ft or 398 Kg/sq metre
 Hull strength (Relative):
  - Cross-sectional: 0.89
  - Longitudinal: 2.87
  - Overall: 1.00
 Hull space for machinery, storage, compartmentation is cramped
 Room for accommodation and workspaces is excellent

Springsharp 3.0b2 Beta can't deal with the Italian Capitani Romani class

I was disappointed that the Italian Captani Romani class doesn't work in Springsharp 3.0b2. I would have to alter the design a great deal to have acceptable performance. I believe that the issue is machinery that is too heavy for the power. By radically reducing the speed and displacement, I was able to have adequate strength and seakeeping, but the speed is a ridiculous 32 knots. If someone has a magic formula to make the design work, I would be interested. I already increased the draft to help. This is a good data and picture page. This is the Springsharp report:

It/CL/1939 Capitani Romani, Enter country Enter ship type laid down 1939 (Engine 1950)

Displacement:
 3,001 t light; 3,142 t standard; 3,830 t normal; 4,381 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
 (460.88 ft / 455.18 ft) x 47.24 ft x (16.40 / 17.88 ft)
 (140.48 m / 138.74 m) x 14.40 m  x (5.00 / 5.45 m)

Armament:
      8 - 5.31" / 135 mm 45.0 cal guns - 75.71lbs / 34.34kg shells, 150 per gun
   Dual purpose guns in turret on barbette mounts, 1938 Model
   4 x Single mounts on centreline ends, evenly spread
      8 - 1.46" / 37.0 mm 54.0 cal guns - 1.66lbs / 0.75kg shells, 150 per gun
   Anti-air guns in deck mounts, 1939 Model
   8 x Single mounts on sides, evenly spread
  8 raised mounts
      8 - 0.79" / 20.0 mm 65.0 cal guns - 0.27lbs / 0.12kg shells, 150 per gun
   Anti-air guns in deck mounts, 1939 Model
   4 x Twin mounts on sides, evenly spread
  4 raised mounts
      Weight of broadside 621 lbs / 282 kg
      8 - 21.0" / 533 mm, 22.97 ft / 7.00 m torpedoes - 1.552 t each, 12.418 t total
 In 2 sets of deck mounted side rotating tubes

Armour:
   - Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
 Main: 0.71" / 18 mm 0.71" / 18 mm  0.71" / 18 mm

   - Conning towers: Forward 0.55" / 14 mm,  Aft 0.00" / 0 mm

Machinery:
 Oil fired boilers, steam turbines, 
 Geared drive, 2 shafts, 49,208 shp / 36,709 Kw = 32.00 kts
 Range 4,000nm at 23.00 kts
 Bunker at max displacement = 1,239 tons

Complement:
 243 - 316

Cost:
 £1.913 million / $7.652 million

Distribution of weights at normal displacement:
 Armament: 204 tons, 5.3 %
    - Guns: 191 tons, 5.0 %
    - Torpedoes: 12 tons, 0.3 %
 Armour: 46 tons, 1.2 %
    - Armament: 43 tons, 1.1 %
    - Conning Tower: 3 tons, 0.1 %
 Machinery: 1,177 tons, 30.7 %
 Hull, fittings & equipment: 1,574 tons, 41.1 %
 Fuel, ammunition & stores: 829 tons, 21.7 %
 Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
 Survivability (Non-critical penetrating hits needed to sink ship):
   4,062 lbs / 1,842 Kg = 54.1 x 5.3 " / 135 mm shells or 0.9 torpedoes
 Stability (Unstable if below 1.00): 1.31
 Metacentric height 2.6 ft / 0.8 m
 Roll period: 12.2 seconds
 Steadiness - As gun platform (Average = 50 %): 51 %
   - Recoil effect (Restricted arc if above 1.00): 0.26
 Seaboat quality  (Average = 1.00): 1.02

Hull form characteristics:
 Hull has a flush deck,
   a normal bow and a round stern
 Block coefficient (normal/deep): 0.380 / 0.399
 Length to Beam Ratio: 9.63 : 1
 'Natural speed' for length: 21.34 kts
 Power going to wave formation at top speed: 58 %
 Trim (Max stability = 0, Max steadiness = 100): 50
 Bow angle (Positive = bow angles forward): 6.00 degrees
 Stern overhang: 3.28 ft / 1.00 m
 Freeboard (% = length of deck as a percentage of waterline length):
    Fore end,  Aft end
    - Forecastle: 25.00 %,  22.97 ft / 7.00 m,  16.73 ft / 5.10 m
    - Forward deck: 30.00 %,  16.73 ft / 5.10 m,  13.78 ft / 4.20 m
    - Aft deck: 30.00 %,  13.78 ft / 4.20 m,  13.78 ft / 4.20 m
    - Quarter deck: 15.00 %,  13.78 ft / 4.20 m,  13.78 ft / 4.20 m
    - Average freeboard:  15.58 ft / 4.75 m
 Ship tends to be wet forward

Ship space, strength and comments:
 Space - Hull below water (magazines/engines, low = better): 114.1 %
  - Above water (accommodation/working, high = better): 142.2 %
 Waterplane Area: 13,062 Square feet or 1,213 Square metres
 Displacement factor (Displacement / loading): 129 %
 Structure weight / hull surface area: 79 lbs/sq ft or 385 Kg/sq metre
 Hull strength (Relative):
  - Cross-sectional: 0.94
  - Longitudinal: 1.74
  - Overall: 1.00
 Hull space for machinery, storage, compartmentation is cramped
 Room for accommodation and workspaces is excellent