The G3 Battlecruiser as a desktop on your PC

You might have to make an adjustment, but this should work as your desktop, with it centered. Stretched will always work, but it will distort the picture.

My answer to Alt_Naval's G3 battlecruiser

I am a fan of the Alt_Naval web site. Alt_Naval was one of my inspirations in early 2005 to try my hand at ship photographs. Alt_Naval has a G3 battlecruiser photograph, but to my taste, it is too close to the Nelson and Rodney and not close enough to the G3 look. I thought that I could get closer, although my photographs has some rough edges.

An 8-gun GB/CB/1909 design

I thought that the next step would be an 8-gun GB/CB/1909 design. The main problem with the design is the large size and cost. What you have, though, is essentially a fast battleship. This is the Springsharp report:

GB/CB/1909, Great Britain Battlecruiser laid down 1909

Displacement:
 29,288 t light; 30,599 t standard; 35,272 t normal; 39,010 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
 (736.00 ft / 728.00 ft) x 95.00 ft x (30.00 / 32.60 ft)
 (224.33 m / 221.89 m) x 28.96 m  x (9.14 / 9.94 m)

Armament:
      8 - 13.50" / 343 mm 45.0 cal guns - 1,240.67lbs / 562.76kg shells, 90 per gun
   Breech loading guns in turret on barbette mounts, 1909 Model
   4 x Twin mounts on centreline ends, evenly spread
  1 raised mount - superfiring
      12 - 6.00" / 152 mm 45.0 cal guns - 108.93lbs / 49.41kg shells, 150 per gun
   Quick firing guns in casemate mounts, 1909 Model
   12 x Single mounts on sides, forward deck aft
      Weight of broadside 11,233 lbs / 5,095 kg

Armour:
   - Belts:  Width (max) Length (avg)  Height (avg)
 Main: 12.0" / 305 mm 475.00 ft / 144.78 m 9.00 ft / 2.74 m
 Ends: Unarmoured
 Upper: 10.0" / 254 mm 475.00 ft / 144.78 m 8.00 ft / 2.44 m
   Main Belt covers 100 % of normal length

   - Torpedo Bulkhead - Strengthened structural bulkheads:
  2.00" / 51 mm 455.00 ft / 138.68 m 30.00 ft / 9.14 m
 Beam between torpedo bulkheads 95.00 ft / 28.96 m

   - Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
 Main: 12.0" / 305 mm 9.00" / 229 mm  12.0" / 305 mm
 2nd: 4.00" / 102 mm 3.00" / 76 mm  4.00" / 102 mm

   - Protected deck - multiple decks:
 For and Aft decks: 4.00" / 102 mm
 Forecastle: 4.00" / 102 mm  Quarter deck: 4.00" / 102 mm

   - Conning towers: Forward 12.00" / 305 mm, Aft 9.00" / 229 mm

Machinery:
 Oil fired boilers, steam turbines, 
 Direct drive, 4 shafts, 93,167 shp / 69,503 Kw = 27.00 kts
 Range 8,500nm at 16.00 kts
 Bunker at max displacement = 8,411 tons

Complement:
 1,286 - 1,672

Cost:
 £2.606 million / $10.422 million

Distribution of weights at normal displacement:
 Armament: 1,928 tons, 5.5 %
    - Guns: 1,928 tons, 5.5 %
 Armour: 11,946 tons, 33.9 %
    - Belts: 3,799 tons, 10.8 %
    - Torpedo bulkhead: 1,010 tons, 2.9 %
    - Armament: 2,902 tons, 8.2 %
    - Armour Deck: 3,747 tons, 10.6 %
    - Conning Towers: 487 tons, 1.4 %
 Machinery: 4,235 tons, 12.0 %
 Hull, fittings & equipment: 11,180 tons, 31.7 %
 Fuel, ammunition & stores: 5,983 tons, 17.0 %
 Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
 Survivability (Non-critical penetrating hits needed to sink ship):
   62,433 lbs / 28,319 Kg = 50.8 x 13.5 " / 343 mm shells or 9.2 torpedoes
 Stability (Unstable if below 1.00): 1.15
 Metacentric height 6.0 ft / 1.8 m
 Roll period: 16.2 seconds
 Steadiness - As gun platform (Average = 50 %): 80 %
   - Recoil effect (Restricted arc if above 1.00): 0.78
 Seaboat quality  (Average = 1.00): 1.60

Hull form characteristics:
 Hull has low quarterdeck ,
   a ram bow and a cruiser stern
 Block coefficient (normal/deep): 0.595 / 0.606
 Length to Beam Ratio: 7.66 : 1
 'Natural speed' for length: 26.98 kts
 Power going to wave formation at top speed: 49 %
 Trim (Max stability = 0, Max steadiness = 100): 50
 Bow angle (Positive = bow angles forward): -2.00 degrees
 Stern overhang: -2.00 ft / -0.61 m
 Freeboard (% = length of deck as a percentage of waterline length):
    Fore end,  Aft end
    - Forecastle: 28.00 %,  30.00 ft / 9.14 m,  28.00 ft / 8.53 m
    - Forward deck: 30.00 %,  28.00 ft / 8.53 m,  28.00 ft / 8.53 m
    - Aft deck: 9.00 %,  28.00 ft / 8.53 m,  28.00 ft / 8.53 m
    - Quarter deck: 33.00 %,  20.00 ft / 6.10 m,  20.00 ft / 6.10 m
    - Average freeboard:  25.58 ft / 7.80 m

Ship space, strength and comments:
 Space - Hull below water (magazines/engines, low = better): 65.0 %
  - Above water (accommodation/working, high = better): 208.8 %
 Waterplane Area: 50,347 Square feet or 4,677 Square metres
 Displacement factor (Displacement / loading): 118 %
 Structure weight / hull surface area: 175 lbs/sq ft or 853 Kg/sq metre
 Hull strength (Relative):
  - Cross-sectional: 0.95
  - Longitudinal: 1.57
  - Overall: 1.00
 Excellent machinery, storage, compartmentation space
 Excellent accommodation and workspace room
 Ship has slow, easy roll, a good, steady gun platform
 Excellent seaboat, comfortable, can fire her guns in the heaviest weather

The GB/CB/1909 design

I thought that it would be interesting to see the battlecruiser analog to the GB/BB/1905 design. The battlecruiser is also well-protected and only marginally faster at 27.5 knots:

GB/CB/1909, Great Britain Battlecruiser laid down 1909

Displacement:
 26,817 t light; 27,945 t standard; 32,366 t normal; 35,903 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
 (703.00 ft / 695.00 ft) x 94.00 ft x (30.00 / 32.64 ft)
 (214.27 m / 211.84 m) x 28.65 m  x (9.14 / 9.95 m)

Armament:
      6 - 13.50" / 343 mm 45.0 cal guns - 1,240.67lbs / 562.76kg shells, 90 per gun
   Breech loading guns in turret on barbette mounts, 1909 Model
   3 x Twin mounts on centreline ends, majority forward
  1 raised mount - superfiring
      12 - 6.00" / 152 mm 45.0 cal guns - 108.93lbs / 49.41kg shells, 150 per gun
   Quick firing guns in casemate mounts, 1909 Model
   12 x Single mounts on sides, forward deck aft
      Weight of broadside 8,751 lbs / 3,969 kg

Armour:
   - Belts:  Width (max) Length (avg)  Height (avg)
 Main: 12.0" / 305 mm 455.00 ft / 138.68 m 9.00 ft / 2.74 m
 Ends: Unarmoured
 Upper: 10.0" / 254 mm 455.00 ft / 138.68 m 8.00 ft / 2.44 m
   Main Belt covers 101 % of normal length

   - Torpedo Bulkhead - Strengthened structural bulkheads:
  2.00" / 51 mm 455.00 ft / 138.68 m 30.00 ft / 9.14 m
 Beam between torpedo bulkheads 62.00 ft / 18.90 m

   - Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
 Main: 12.0" / 305 mm 9.00" / 229 mm  12.0" / 305 mm
 2nd: 4.00" / 102 mm 3.00" / 76 mm  4.00" / 102 mm

   - Protected deck - multiple decks:
 For and Aft decks: 4.00" / 102 mm
 Forecastle: 4.00" / 102 mm  Quarter deck: 4.00" / 102 mm

   - Conning towers: Forward 12.00" / 305 mm, Aft 9.00" / 229 mm

Machinery:
 Oil fired boilers, steam turbines, 
 Direct drive, 4 shafts, 96,148 shp / 71,727 Kw = 27.50 kts
 Range 8,500nm at 16.00 kts
 Bunker at max displacement = 7,958 tons

Complement:
 1,206 - 1,568

Cost:
 £2.307 million / $9.226 million

Distribution of weights at normal displacement:
 Armament: 1,501 tons, 4.6 %
    - Guns: 1,501 tons, 4.6 %
 Armour: 10,858 tons, 33.5 %
    - Belts: 3,649 tons, 11.3 %
    - Torpedo bulkhead: 1,010 tons, 3.1 %
    - Armament: 2,256 tons, 7.0 %
    - Armour Deck: 3,484 tons, 10.8 %
    - Conning Towers: 459 tons, 1.4 %
 Machinery: 4,370 tons, 13.5 %
 Hull, fittings & equipment: 10,087 tons, 31.2 %
 Fuel, ammunition & stores: 5,549 tons, 17.1 %
 Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
 Survivability (Non-critical penetrating hits needed to sink ship):
   57,968 lbs / 26,294 Kg = 47.1 x 13.5 " / 343 mm shells or 8.7 torpedoes
 Stability (Unstable if below 1.00): 1.19
 Metacentric height 6.3 ft / 1.9 m
 Roll period: 15.7 seconds
 Steadiness - As gun platform (Average = 50 %): 75 %
   - Recoil effect (Restricted arc if above 1.00): 0.61
 Seaboat quality  (Average = 1.00): 1.50

Hull form characteristics:
 Hull has low quarterdeck ,
   a ram bow and a cruiser stern
 Block coefficient (normal/deep): 0.578 / 0.589
 Length to Beam Ratio: 7.39 : 1
 'Natural speed' for length: 26.36 kts
 Power going to wave formation at top speed: 51 %
 Trim (Max stability = 0, Max steadiness = 100): 50
 Bow angle (Positive = bow angles forward): -2.00 degrees
 Stern overhang: -2.00 ft / -0.61 m
 Freeboard (% = length of deck as a percentage of waterline length):
    Fore end,  Aft end
    - Forecastle: 28.00 %,  30.00 ft / 9.14 m,  28.00 ft / 8.53 m
    - Forward deck: 30.00 %,  28.00 ft / 8.53 m,  28.00 ft / 8.53 m
    - Aft deck: 9.00 %,  28.00 ft / 8.53 m,  28.00 ft / 8.53 m
    - Quarter deck: 33.00 %,  20.00 ft / 6.10 m,  20.00 ft / 6.10 m
    - Average freeboard:  25.58 ft / 7.80 m

Ship space, strength and comments:
 Space - Hull below water (magazines/engines, low = better): 99.7 %
  - Above water (accommodation/working, high = better): 207.0 %
 Waterplane Area: 46,807 Square feet or 4,349 Square metres
 Displacement factor (Displacement / loading): 121 %
 Structure weight / hull surface area: 168 lbs/sq ft or 822 Kg/sq metre
 Hull strength (Relative):
  - Cross-sectional: 0.95
  - Longitudinal: 1.63
  - Overall: 1.00
 Adequate machinery, storage, compartmentation space
 Excellent accommodation and workspace room
 Ship has slow, easy roll, a good, steady gun platform
 Good seaboat, rides out heavy weather easily

The GB/BB/1909 battleship design

This is a design that my friend Cliff had considered building as part of his program. It is just a 620ft long ship and has only 6-13.5in/45 and 12-6in QF guns. For a 29,000 ton ship (nominally), the ship is underarmed but well-protected, despite the belt being short. The real question is why the ship is as good as it is. I backed off coal-fired boilers as my photo is clearly an oil-fired ship, which is consistent with Cliff's plans. He often opted for speed and armour and sacrificed armament. Did I overlook something? In any case, here is the Springsharp report for those with sharp eyes to peruse:

GB/BB/1909, Great Britain Battleship laid down 1909

Displacement:
 23,901 t light; 24,964 t standard; 29,121 t normal; 32,447 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
 (628.00 ft / 620.00 ft) x 95.00 ft x (30.20 / 32.97 ft)
 (191.41 m / 188.98 m) x 28.96 m  x (9.20 / 10.05 m)

Armament:
      6 - 13.50" / 343 mm 45.0 cal guns - 1,240.67lbs / 562.76kg shells, 90 per gun
   Breech loading guns in turret on barbette mounts, 1909 Model
   3 x Twin mounts on centreline ends, majority forward
  1 raised mount - superfiring
      12 - 6.00" / 152 mm 45.0 cal guns - 108.93lbs / 49.41kg shells, 150 per gun
   Quick firing guns in casemate mounts, 1909 Model
   12 x Single mounts on sides, forward deck aft
      Weight of broadside 8,751 lbs / 3,969 kg

Armour:
   - Belts:  Width (max) Length (avg)  Height (avg)
 Main: 13.0" / 330 mm 385.00 ft / 117.35 m 9.00 ft / 2.74 m
 Ends: Unarmoured
 Upper: 10.0" / 254 mm 385.00 ft / 117.35 m 8.00 ft / 2.44 m
   Main Belt covers 96 % of normal length
   Main belt does not fully cover magazines and engineering spaces

   - Torpedo Bulkhead - Strengthened structural bulkheads:
  2.00" / 51 mm 385.00 ft / 117.35 m 30.20 ft / 9.20 m
 Beam between torpedo bulkheads 62.00 ft / 18.90 m

   - Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
 Main: 12.0" / 305 mm 9.00" / 229 mm  12.0" / 305 mm
 2nd: 4.00" / 102 mm 3.00" / 76 mm  4.00" / 102 mm

   - Protected deck - multiple decks:
 For and Aft decks: 4.00" / 102 mm
 Forecastle: 4.00" / 102 mm  Quarter deck: 4.00" / 102 mm

   - Conning towers: Forward 12.00" / 305 mm, Aft 9.00" / 229 mm

Machinery:
 Oil fired boilers, steam turbines, 
 Direct drive, 4 shafts, 76,183 shp / 56,832 Kw = 26.00 kts
 Range 8,500nm at 16.00 kts
 Bunker at max displacement = 7,482 tons

Complement:
 1,114 - 1,449

Cost:
 £2.077 million / $8.310 million

Distribution of weights at normal displacement:
 Armament: 1,501 tons, 5.2 %
    - Guns: 1,501 tons, 5.2 %
 Armour: 9,945 tons, 34.1 %
    - Belts: 3,325 tons, 11.4 %
    - Torpedo bulkhead: 860 tons, 3.0 %
    - Armament: 2,204 tons, 7.6 %
    - Armour Deck: 3,126 tons, 10.7 %
    - Conning Towers: 428 tons, 1.5 %
 Machinery: 3,463 tons, 11.9 %
 Hull, fittings & equipment: 8,992 tons, 30.9 %
 Fuel, ammunition & stores: 5,220 tons, 17.9 %
 Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
 Survivability (Non-critical penetrating hits needed to sink ship):
   54,031 lbs / 24,508 Kg = 43.9 x 13.5 " / 343 mm shells or 8.6 torpedoes
 Stability (Unstable if below 1.00): 1.22
 Metacentric height 6.7 ft / 2.0 m
 Roll period: 15.5 seconds
 Steadiness - As gun platform (Average = 50 %): 74 %
   - Recoil effect (Restricted arc if above 1.00): 0.57
 Seaboat quality  (Average = 1.00): 1.47

Hull form characteristics:
 Hull has low quarterdeck ,
   a ram bow and a cruiser stern
 Block coefficient (normal/deep): 0.573 / 0.585
 Length to Beam Ratio: 6.53 : 1
 'Natural speed' for length: 24.90 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: -2.00 ft / -0.61 m
 Freeboard (% = length of deck as a percentage of waterline length):
    Fore end,  Aft end
    - Forecastle: 28.00 %,  29.00 ft / 8.84 m,  27.00 ft / 8.23 m
    - Forward deck: 30.00 %,  27.00 ft / 8.23 m,  27.00 ft / 8.23 m
    - Aft deck: 9.00 %,  27.00 ft / 8.23 m,  27.00 ft / 8.23 m
    - Quarter deck: 33.00 %,  19.00 ft / 5.79 m,  19.00 ft / 5.79 m
    - Average freeboard:  24.58 ft / 7.49 m

Ship space, strength and comments:
 Space - Hull below water (magazines/engines, low = better): 96.3 %
  - Above water (accommodation/working, high = better): 193.9 %
 Waterplane Area: 42,002 Square feet or 3,902 Square metres
 Displacement factor (Displacement / loading): 121 %
 Structure weight / hull surface area: 170 lbs/sq ft or 828 Kg/sq metre
 Hull strength (Relative):
  - Cross-sectional: 0.93
  - Longitudinal: 1.95
  - Overall: 1.00
 Adequate machinery, storage, compartmentation space
 Excellent accommodation and workspace room
 Ship has slow, easy roll, a good, steady gun platform
 Good seaboat, rides out heavy weather easily

A rather unsatisfactory Viper design

I am not sure if it is possible to achieve a good result for an 1898 destroyer in Springsharp. We are going with the very low, but realistic freeboard. This is my rather lame attempt at HMS Viper, the turbine destroyer:

Viper, Great Britain Torpedo Boat Destroyer laid down 1898 (Engine 1917)

Displacement:
 284 t light; 295 t standard; 333 t normal; 365 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
 (210.00 ft / 210.00 ft) x 21.00 ft x (7.25 / 7.66 ft)
 (64.01 m / 64.01 m) x 6.40 m  x (2.21 / 2.33 m)

Armament:
      1 - 3.00" / 76.2 mm 45.0 cal gun - 13.62lbs / 6.18kg shells, 150 per gun
   Quick firing gun in deck mounts, 1898 Model
   2 x Single mounts on centreline, forward deck forward
  1 raised mount - superfiring
      5 - 2.24" / 57.0 mm 45.0 cal guns - 5.70lbs / 2.58kg shells, 150 per gun
   Quick firing guns in deck mounts, 1898 Model
   4 x Single mounts on sides, forward deck aft
   1 x Single mount on centreline, aft deck aft
      Weight of broadside 42 lbs / 19 kg
      Main Torpedoes
      2 - 17.7" / 450 mm, 20.00 ft / 6.10 m torpedoes - 0.650 t each, 1.300 t total
 In 2 sets of deck mounted centre rotating tubes

Machinery:
 Coal fired boilers, steam turbines, 
 Direct drive, 2 shafts, 11,992 shp / 8,946 Kw = 30.00 kts
 Range 2,200nm at 12.00 kts
 Bunker at max displacement = 70 tons (100% coal)
   Caution: Delicate, lightweight machinery

Complement:
 38 - 50

Cost:
 £0.038 million / $0.153 million

Distribution of weights at normal displacement:
 Armament: 11 tons, 3.3 %
    - Guns: 8 tons, 2.5 %
    - Weapons: 3 tons, 0.8 %
 Machinery: 186 tons, 55.7 %
 Hull, fittings & equipment: 87 tons, 26.2 %
 Fuel, ammunition & stores: 49 tons, 14.7 %
 Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
 Survivability (Non-critical penetrating hits needed to sink ship):
   69 lbs / 31 Kg = 5.1 x 3.0 " / 76 mm shells or 0.3 torpedoes
 Stability (Unstable if below 1.00): 1.06
 Metacentric height 0.5 ft / 0.2 m
 Roll period: 12.0 seconds
 Steadiness - As gun platform (Average = 50 %): 51 %
   - Recoil effect (Restricted arc if above 1.00): 0.18
 Seaboat quality  (Average = 1.00): 0.51

Hull form characteristics:
 Hull has a flush deck,
   a normal bow and a round stern
 Block coefficient (normal/deep): 0.365 / 0.378
 Length to Beam Ratio: 10.00 : 1
 'Natural speed' for length: 14.49 kts
 Power going to wave formation at top speed: 71 %
 Trim (Max stability = 0, Max steadiness = 100): 100
 Bow angle (Positive = bow angles forward): 0.00 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 %,  9.00 ft / 2.74 m,  8.00 ft / 2.44 m
    - Forward deck: 30.00 %,  8.00 ft / 2.44 m,  7.00 ft / 2.13 m
    - Aft deck: 35.00 %,  7.00 ft / 2.13 m,  7.00 ft / 2.13 m
    - Quarter deck: 15.00 %,  7.00 ft / 2.13 m,  7.00 ft / 2.13 m
    - Average freeboard:  7.43 ft / 2.26 m
 Ship tends to be wet forward

Ship space, strength and comments:
 Space - Hull below water (magazines/engines, low = better): 186.5 %
  - Above water (accommodation/working, high = better): 65.7 %
 Waterplane Area: 2,654 Square feet or 247 Square metres
 Displacement factor (Displacement / loading): 34 %
 Structure weight / hull surface area: 21 lbs/sq ft or 100 Kg/sq metre
 Hull strength (Relative):
  - Cross-sectional: 0.48
  - Longitudinal: 1.19
  - Overall: 0.53
 Cramped machinery, storage, compartmentation space
 Cramped accommodation and workspace room
 Caution: Lacks seaworthiness - very limited seakeeping ability

HMS Viper

When I first saw the photograph of the torpedo boat destroyer HMS Viper making 36 knots on trials in Marsh's book, it really captured my imagination. When I was in Minnesota in 2003, I painted this picture, based on the photograph, as I thought it would be colored. This is a slightly edited version of the painting.

A new GB/CB/1905 photograph

This photograph is a departure for me. It did not originate with a photograph that I edited but with a drawing that is posted to KentishKnock.com. The drawing originated from a pencil drawing that I originally did in May 2001. I did graphic editing on the drawing later. I took that drawing, which shows the ship in perspective and "flattened" it. I used the GIMP and the pespective transformation along with some further editing. I have a new design to go with the photograph. The photograph is scaled from my only surviving pencil drawing, dating from the early 1970's. The original only had 4in side armour, because we assumed that it would be necessary to obtain a 33 knot speed. This design shows that with the same armour coverage as the original drawing, that the side armour can be upgraded to 6in thickness:

GB/CB/1905 Uparmoured, Great Britain Battlecruiser laid down 1905 (Engine 1908)

Displacement:
 24,410 t light; 25,246 t standard; 29,225 t normal; 32,408 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
 (776.00 ft / 770.00 ft) x 80.00 ft x (27.00 / 29.44 ft)
 (236.52 m / 234.70 m) x 24.38 m  x (8.23 / 8.97 m)

Armament:
      4 - 12.00" / 305 mm 45.0 cal guns - 850.00lbs / 385.55kg shells, 90 per gun
   Breech loading guns in turret on barbette mounts, 1905 Model
   2 x Twin mounts on centreline ends, evenly spread
      9 - 6.00" / 152 mm 45.0 cal guns - 108.92lbs / 49.41kg shells, 150 per gun
   Quick firing guns in deck and hoist mounts, 1905 Model
   8 x Single mounts on sides, evenly spread
   1 x Single mount on centreline, aft deck forward
  1 raised mount
      Weight of broadside 4,380 lbs / 1,987 kg

Armour:
   - Belts:  Width (max) Length (avg)  Height (avg)
 Main: 6.00" / 152 mm 470.00 ft / 143.26 m 9.00 ft / 2.74 m
 Ends: Unarmoured
 Upper: 6.00" / 152 mm 340.00 ft / 103.63 m 8.00 ft / 2.44 m
   Main Belt covers 94 % of normal length
   Main belt does not fully cover magazines and engineering spaces

   - Torpedo Bulkhead - Additional damage containing bulkheads:
  1.00" / 25 mm 555.00 ft / 169.16 m 27.00 ft / 8.23 m
 Beam between torpedo bulkheads 56.00 ft / 17.07 m

   - Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
 Main: 8.00" / 203 mm 5.00" / 127 mm  8.00" / 203 mm
 2nd: 4.00" / 102 mm 3.00" / 76 mm  4.00" / 102 mm

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

   - Conning towers: Forward 8.00" / 203 mm, Aft 5.00" / 127 mm

Machinery:
 Oil fired boilers, steam turbines, 
 Direct drive, 4 shafts, 176,160 shp / 131,415 Kw = 33.00 kts
 Range 5,800nm at 18.00 kts
 Bunker at max displacement = 7,162 tons

Complement:
 1,116 - 1,452

Cost:
 £2.518 million / $10.072 million

Distribution of weights at normal displacement:
 Armament: 880 tons, 3.0 %
    - Guns: 880 tons, 3.0 %
 Armour: 5,227 tons, 17.9 %
    - Belts: 1,790 tons, 6.1 %
    - Torpedo bulkhead: 554 tons, 1.9 %
    - Armament: 915 tons, 3.1 %
    - Armour Deck: 1,703 tons, 5.8 %
    - Conning Towers: 266 tons, 0.9 %
 Machinery: 8,897 tons, 30.4 %
 Hull, fittings & equipment: 9,406 tons, 32.2 %
 Fuel, ammunition & stores: 4,815 tons, 16.5 %
 Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
 Survivability (Non-critical penetrating hits needed to sink ship):
   28,878 lbs / 13,099 Kg = 33.4 x 12.0 " / 305 mm shells or 3.0 torpedoes
 Stability (Unstable if below 1.00): 1.28
 Metacentric height 5.6 ft / 1.7 m
 Roll period: 14.2 seconds
 Steadiness - As gun platform (Average = 50 %): 57 %
   - Recoil effect (Restricted arc if above 1.00): 0.39
 Seaboat quality  (Average = 1.00): 1.15

Hull form characteristics:
 Hull has low quarterdeck ,
   a ram bow and a cruiser stern
 Block coefficient (normal/deep): 0.615 / 0.625
 Length to Beam Ratio: 9.63 : 1
 'Natural speed' for length: 27.75 kts
 Power going to wave formation at top speed: 55 %
 Trim (Max stability = 0, Max steadiness = 100): 50
 Bow angle (Positive = bow angles forward): -2.00 degrees
 Stern overhang: -2.00 ft / -0.61 m
 Freeboard (% = length of deck as a percentage of waterline length):
    Fore end,  Aft end
    - Forecastle: 20.00 %,  30.00 ft / 9.14 m,  28.00 ft / 8.53 m
    - Forward deck: 30.00 %,  28.00 ft / 8.53 m,  26.00 ft / 7.92 m
    - Aft deck: 25.00 %,  26.00 ft / 7.92 m,  26.00 ft / 7.92 m
    - Quarter deck: 25.00 %,  18.00 ft / 5.49 m,  18.00 ft / 5.49 m
    - Average freeboard:  24.86 ft / 7.58 m
 Ship tends to be wet forward

Ship space, strength and comments:
 Space - Hull below water (magazines/engines, low = better): 159.7 %
  - Above water (accommodation/working, high = better): 207.0 %
 Waterplane Area: 45,688 Square feet or 4,245 Square metres
 Displacement factor (Displacement / loading): 108 %
 Structure weight / hull surface area: 139 lbs/sq ft or 681 Kg/sq metre
 Hull strength (Relative):
  - Cross-sectional: 0.99
  - Longitudinal: 1.12
  - Overall: 1.00
 Cramped machinery, storage, compartmentation space
 Excellent accommodation and workspace room

The GB/CA/1921 New Armoured Cruiser (Updated)

This is my current concept for a British 1921-style armoured cruiser. Since the battlecruisers will be carrying larger guns, the armoured cruiser can use the 12in/50 gun. This is the updated Springsharp report which includes a range, which had been inadvertently omitted:

GB/CA/1921 New, Great Britain Armoured Cruiser laid down 1921 (Engine 1927)

Displacement:
 26,936 t light; 28,084 t standard; 29,813 t normal; 31,196 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
 (770.82 ft / 765.00 ft) x 87.00 ft x (26.00 / 26.97 ft)
 (234.95 m / 233.17 m) x 26.52 m  x (7.92 / 8.22 m)

Armament:
      9 - 12.00" / 305 mm 50.0 cal guns - 915.01lbs / 415.04kg shells, 90 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
      16 - 5.50" / 140 mm 50.0 cal guns - 85.01lbs / 38.56kg shells, 150 per gun
   Quick firing guns in turret on barbette mounts, 1921 Model
   8 x Twin mounts on sides, forward deck aft
      6 - 4.70" / 119 mm 45.0 cal guns - 52.36lbs / 23.75kg shells, 150 per gun
   Anti-air guns in deck and hoist mounts, 1921 Model
   6 x Single mounts on sides, aft deck forward
  6 raised mounts
      Weight of broadside 9,909 lbs / 4,495 kg

Armour:
   - Belts:  Width (max) Length (avg)  Height (avg)
 Main: 9.00" / 229 mm 520.00 ft / 158.50 m 8.00 ft / 2.44 m
 Ends: Unarmoured
 Upper: 7.00" / 178 mm 520.00 ft / 158.50 m 8.00 ft / 2.44 m
   Main Belt covers 105 % of normal length
   Main belt does not fully cover magazines and engineering spaces

   - Torpedo Bulkhead - Additional damage containing bulkheads:
  1.50" / 38 mm 520.00 ft / 158.50 m 26.00 ft / 7.92 m
 Beam between torpedo bulkheads 55.00 ft / 16.76 m

   - Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
 Main: 9.00" / 229 mm 7.00" / 178 mm  9.00" / 229 mm
 2nd: 4.00" / 102 mm 4.00" / 102 mm  4.00" / 102 mm

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

   - Conning towers: Forward 9.00" / 229 mm, Aft 7.00" / 178 mm

Machinery:
 Oil fired boilers, steam turbines, 
 Geared drive, 4 shafts, 167,706 shp / 125,109 Kw = 33.00 kts
 Range 5,400nm at 16.00 kts
 Bunker at max displacement = 3,112 tons

Complement:
 1,133 - 1,474

Cost:
 £6.914 million / $27.655 million

Distribution of weights at normal displacement:
 Armament: 2,070 tons, 6.9 %
    - Guns: 2,070 tons, 6.9 %
 Armour: 7,938 tons, 26.6 %
    - Belts: 2,770 tons, 9.3 %
    - Torpedo bulkhead: 750 tons, 2.5 %
    - Armament: 2,220 tons, 7.4 %
    - Armour Deck: 1,867 tons, 6.3 %
    - Conning Towers: 331 tons, 1.1 %
 Machinery: 5,294 tons, 17.8 %
 Hull, fittings & equipment: 11,634 tons, 39.0 %
 Fuel, ammunition & stores: 2,876 tons, 9.6 %
 Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
 Survivability (Non-critical penetrating hits needed to sink ship):
   38,164 lbs / 17,311 Kg = 44.2 x 12.0 " / 305 mm shells or 4.7 torpedoes
 Stability (Unstable if below 1.00): 1.07
 Metacentric height 4.6 ft / 1.4 m
 Roll period: 16.9 seconds
 Steadiness - As gun platform (Average = 50 %): 51 %
   - Recoil effect (Restricted arc if above 1.00): 0.77
 Seaboat quality  (Average = 1.00): 1.01

Hull form characteristics:
 Hull has a flush deck,
   an extended bulbous bow and small transom stern
 Block coefficient (normal/deep): 0.603 / 0.608
 Length to Beam Ratio: 8.79 : 1
 'Natural speed' for length: 29.66 kts
 Power going to wave formation at top speed: 56 %
 Trim (Max stability = 0, Max steadiness = 100): 50
 Bow angle (Positive = bow angles forward): 10.00 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 %,  33.00 ft / 10.06 m,  28.00 ft / 8.53 m
    - Forward deck: 30.00 %,  28.00 ft / 8.53 m,  24.00 ft / 7.32 m
    - Aft deck: 35.00 %,  24.00 ft / 7.32 m,  24.00 ft / 7.32 m
    - Quarter deck: 15.00 %,  24.00 ft / 7.32 m,  24.00 ft / 7.32 m
    - Average freeboard:  25.80 ft / 7.86 m

Ship space, strength and comments:
 Space - Hull below water (magazines/engines, low = better): 140.5 %
  - Above water (accommodation/working, high = better): 209.7 %
 Waterplane Area: 50,052 Square feet or 4,650 Square metres
 Displacement factor (Displacement / loading): 105 %
 Structure weight / hull surface area: 171 lbs/sq ft or 835 Kg/sq metre
 Hull strength (Relative):
  - Cross-sectional: 0.98
  - Longitudinal: 1.19
  - Overall: 1.00
 Cramped machinery, storage, compartmentation space
 Excellent accommodation and workspace room

My Ger/BB/1905 Flush Decked picture is getting better

I have done more work on my photograph of a Ger/BB/1905 Flush-Decked battleship. This was a concept that I had in the early 1970's for a German ship with 8-12in/45 and 12-6in QF guns.

The GB/CB/1916 with a long belt

With a long belt, the GB/CB/1916 can still make 34 knots. The original concept for the design was to use a very short armour belt so as to make the maximum speed. This is a version with a longer belt (110% of normal). This is the Springsharp report:

GB/CB/1916 Protected, Great Britain Battlecruiser laid down 1916 (Engine 1921)

Displacement:
 42,841 t light; 44,542 t standard; 46,914 t normal; 48,811 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
 (862.86 ft / 855.00 ft) x 105.00 ft x (31.00 / 32.02 ft)
 (263.00 m / 260.60 m) x 32.00 m  x (9.45 / 9.76 m)

Armament:
      6 - 16.50" / 419 mm 45.0 cal guns - 2,265.01lbs / 1,027.39kg shells, 90 per gun
   Breech loading guns in turret on barbette mounts, 1916 Model
   2 x Triple mounts on centreline, forward deck forward
  1 raised mount - superfiring
      10 - 6.00" / 152 mm 45.0 cal guns - 100.00lbs / 45.36kg shells, 150 per gun
   Quick firing guns in deck and hoist mounts, 1916 Model
   10 x Single mounts on sides, forward deck aft
  2 raised mounts - superfiring
      Weight of broadside 14,590 lbs / 6,618 kg

Armour:
   - Belts:  Width (max) Length (avg)  Height (avg)
 Main: 12.0" / 305 mm 610.00 ft / 185.93 m 8.00 ft / 2.44 m
 Ends: Unarmoured
 Upper: 8.00" / 203 mm 610.00 ft / 185.93 m 8.00 ft / 2.44 m
   Main Belt covers 110 % of normal length
   Main belt does not fully cover magazines and engineering spaces
   Main Belt inclined -12.00 degrees (positive = in)

   - Torpedo Bulkhead - Additional damage containing bulkheads:
  2.00" / 51 mm 610.00 ft / 185.93 m 31.00 ft / 9.45 m
 Beam between torpedo bulkheads 64.00 ft / 19.51 m

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

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

   - Conning towers: Forward 12.00" / 305 mm, Aft 8.00" / 203 mm

Machinery:
 Oil fired boilers, steam turbines, 
 Geared drive, 4 shafts, 259,314 shp / 193,448 Kw = 34.00 kts
 Range 5,400nm at 16.00 kts
 Bunker at max displacement = 4,269 tons

Complement:
 1,593 - 2,071

Cost:
 £6.740 million / $26.962 million

Distribution of weights at normal displacement:
 Armament: 2,467 tons, 5.3 %
    - Guns: 2,467 tons, 5.3 %
 Armour: 12,455 tons, 26.5 %
    - Belts: 4,052 tons, 8.6 %
    - Torpedo bulkhead: 1,399 tons, 3.0 %
    - Armament: 2,808 tons, 6.0 %
    - Armour Deck: 3,635 tons, 7.7 %
    - Conning Towers: 560 tons, 1.2 %
 Machinery: 8,930 tons, 19.0 %
 Hull, fittings & equipment: 18,989 tons, 40.5 %
 Fuel, ammunition & stores: 4,073 tons, 8.7 %
 Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
 Survivability (Non-critical penetrating hits needed to sink ship):
   62,606 lbs / 28,398 Kg = 27.9 x 16.5 " / 419 mm shells or 7.7 torpedoes
 Stability (Unstable if below 1.00): 1.13
 Metacentric height 6.8 ft / 2.1 m
 Roll period: 16.9 seconds
 Steadiness - As gun platform (Average = 50 %): 56 %
   - Recoil effect (Restricted arc if above 1.00): 0.71
 Seaboat quality  (Average = 1.00): 1.12

Hull form characteristics:
 Hull has low quarterdeck ,
   an extended bulbous bow and a cruiser stern
 Block coefficient (normal/deep): 0.590 / 0.594
 Length to Beam Ratio: 8.14 : 1
 'Natural speed' for length: 29.24 kts
 Power going to wave formation at top speed: 56 %
 Trim (Max stability = 0, Max steadiness = 100): 50
 Bow angle (Positive = bow angles forward): 12.00 degrees
 Stern overhang: -2.00 ft / -0.61 m
 Freeboard (% = length of deck as a percentage of waterline length):
    Fore end,  Aft end
    - Forecastle: 20.00 %,  37.00 ft / 11.28 m,  32.00 ft / 9.75 m
    - Forward deck: 30.00 %,  32.00 ft / 9.75 m,  30.00 ft / 9.14 m
    - Aft deck: 22.00 %,  30.00 ft / 9.14 m,  30.00 ft / 9.14 m
    - Quarter deck: 28.00 %,  22.00 ft / 6.71 m,  23.00 ft / 7.01 m
    - Average freeboard:  29.00 ft / 8.84 m

Ship space, strength and comments:
 Space - Hull below water (magazines/engines, low = better): 144.8 %
  - Above water (accommodation/working, high = better): 237.8 %
 Waterplane Area: 65,049 Square feet or 6,043 Square metres
 Displacement factor (Displacement / loading): 108 %
 Structure weight / hull surface area: 209 lbs/sq ft or 1,020 Kg/sq metre
 Hull strength (Relative):
  - Cross-sectional: 0.97
  - Longitudinal: 1.41
  - Overall: 1.00
 Cramped machinery, storage, compartmentation space
 Excellent accommodation and workspace room

A GB/CB/1916 design with better protection

This design is to answer the question about how fast a GB/CB/1916 design ship could be with 12in armour. This is the Springsharp report:

GB/CB/1916 Protected, Great Britain Battlecruiser laid down 1916 (Engine 1921)

Displacement:
 42,991 t light; 44,696 t standard; 47,073 t normal; 48,975 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
 (862.86 ft / 855.00 ft) x 105.00 ft x (31.00 / 32.02 ft)
 (263.00 m / 260.60 m) x 32.00 m  x (9.45 / 9.76 m)

Armament:
      6 - 16.50" / 419 mm 45.0 cal guns - 2,265.00lbs / 1,027.39kg shells, 90 per gun
   Breech loading guns in turret on barbette mounts, 1916 Model
   2 x Triple mounts on centreline, forward deck forward
  1 raised mount - superfiring
      10 - 6.00" / 152 mm 45.0 cal guns - 100.00lbs / 45.36kg shells, 150 per gun
   Quick firing guns in deck and hoist mounts, 1916 Model
   10 x Single mounts on sides, forward deck aft
  2 raised mounts - superfiring
      Weight of broadside 14,590 lbs / 6,618 kg

Armour:
   - Belts:  Width (max) Length (avg)  Height (avg)
 Main: 12.0" / 305 mm 485.00 ft / 147.83 m 8.00 ft / 2.44 m
 Ends: Unarmoured
 Upper: 8.00" / 203 mm 485.00 ft / 147.83 m 8.00 ft / 2.44 m
   Main Belt covers 87 % of normal length
   Main belt does not fully cover magazines and engineering spaces
   Main Belt inclined -12.00 degrees (positive = in)

   - Torpedo Bulkhead - Additional damage containing bulkheads:
  2.00" / 51 mm 485.00 ft / 147.83 m 31.00 ft / 9.45 m
 Beam between torpedo bulkheads 64.00 ft / 19.51 m

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

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

   - Conning towers: Forward 12.00" / 305 mm, Aft 8.00" / 203 mm

Machinery:
 Oil fired boilers, steam turbines, 
 Geared drive, 4 shafts, 292,552 shp / 218,244 Kw = 35.00 kts
 Range 5,400nm at 16.00 kts
 Bunker at max displacement = 4,279 tons

Complement:
 1,597 - 2,077

Cost:
 £7.011 million / $28.045 million

Distribution of weights at normal displacement:
 Armament: 2,467 tons, 5.2 %
    - Guns: 2,467 tons, 5.2 %
 Armour: 11,486 tons, 24.4 %
    - Belts: 3,362 tons, 7.1 %
    - Torpedo bulkhead: 1,113 tons, 2.4 %
    - Armament: 2,808 tons, 6.0 %
    - Armour Deck: 3,642 tons, 7.7 %
    - Conning Towers: 562 tons, 1.2 %
 Machinery: 10,074 tons, 21.4 %
 Hull, fittings & equipment: 18,964 tons, 40.3 %
 Fuel, ammunition & stores: 4,082 tons, 8.7 %
 Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
 Survivability (Non-critical penetrating hits needed to sink ship):
   57,998 lbs / 26,307 Kg = 25.8 x 16.5 " / 419 mm shells or 6.6 torpedoes
 Stability (Unstable if below 1.00): 1.15
 Metacentric height 6.9 ft / 2.1 m
 Roll period: 16.7 seconds
 Steadiness - As gun platform (Average = 50 %): 52 %
   - Recoil effect (Restricted arc if above 1.00): 0.68
 Seaboat quality  (Average = 1.00): 1.03

Hull form characteristics:
 Hull has low quarterdeck ,
   an extended bulbous bow and a cruiser stern
 Block coefficient (normal/deep): 0.592 / 0.596
 Length to Beam Ratio: 8.14 : 1
 'Natural speed' for length: 29.24 kts
 Power going to wave formation at top speed: 57 %
 Trim (Max stability = 0, Max steadiness = 100): 50
 Bow angle (Positive = bow angles forward): 12.00 degrees
 Stern overhang: -2.00 ft / -0.61 m
 Freeboard (% = length of deck as a percentage of waterline length):
    Fore end,  Aft end
    - Forecastle: 20.00 %,  37.00 ft / 11.28 m,  32.00 ft / 9.75 m
    - Forward deck: 30.00 %,  32.00 ft / 9.75 m,  30.00 ft / 9.14 m
    - Aft deck: 22.00 %,  30.00 ft / 9.14 m,  30.00 ft / 9.14 m
    - Quarter deck: 28.00 %,  22.00 ft / 6.71 m,  23.00 ft / 7.01 m
    - Average freeboard:  29.00 ft / 8.84 m

Ship space, strength and comments:
 Space - Hull below water (magazines/engines, low = better): 157.1 %
  - Above water (accommodation/working, high = better): 237.7 %
 Waterplane Area: 65,170 Square feet or 6,055 Square metres
 Displacement factor (Displacement / loading): 105 %
 Structure weight / hull surface area: 208 lbs/sq ft or 1,017 Kg/sq metre
 Hull strength (Relative):
  - Cross-sectional: 0.96
  - Longitudinal: 1.39
  - Overall: 1.00
 Cramped machinery, storage, compartmentation space
 Excellent accommodation and workspace room

A better Ger/BB/1905 (yes, that was the designation)

My original concept was that this ship would be designated the Ger/BB/1905, although I have had second thoughts about that. That is why I did the Ger/BB/1906 Springsharp design. I just did some GIMP hacking on the picture, in hopes of making it better.

The next step

The next step in this design sequence is likely to be a somewhat larger ship with a "1921-style" bridge structure, a pole foremast, and flatter, wider turrets. We would attempt to obtain an even higher speed. The secondary armament would likely be the same, to keep the weight down. The target speed would be 40 knots. Oh, and the main armament would be 6-17in/45 guns firing 2,850 pound shot.

A new GB/CB/1916 Fast battlecruiser concept

I had a concept that has been developing for a few days for a new British fast battlecruiser. As you can see, the photograph is derived from that for the Ger/CB/1912 design. I found that I can run Springsharp 3.0 Beta 3 at my desk, so I developed my initial cut at a design:

GB/CB/1916 Fast, Great Britain Battlecruiser laid down 1916 (Engine 1923)

Displacement:
 42,316 t light; 43,995 t standard; 45,802 t normal; 47,248 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
 (885.86 ft / 878.00 ft) x 104.00 ft x (33.00 / 33.81 ft)
 (270.01 m / 267.61 m) x 31.70 m  x (10.06 / 10.30 m)

Armament:
      6 - 16.50" / 419 mm 45.0 cal guns - 2,265.21lbs / 1,027.48kg shells, 90 per gun
   Breech loading guns in turret on barbette mounts, 1916 Model
   2 x Triple mounts on centreline, forward deck forward
  1 raised mount - superfiring
      10 - 6.00" / 152 mm 45.0 cal guns - 100.00lbs / 45.36kg shells, 150 per gun
   Quick firing guns in deck and hoist mounts, 1916 Model
   10 x Single mounts on sides, forward deck aft
  2 raised mounts - superfiring
      Weight of broadside 14,591 lbs / 6,618 kg

Armour:
   - Belts:  Width (max) Length (avg)  Height (avg)
 Main: 6.00" / 152 mm 480.00 ft / 146.30 m 12.00 ft / 3.66 m
 Ends: Unarmoured
   Main Belt covers 84 % of normal length
   Main belt does not fully cover magazines and engineering spaces
   Main Belt inclined -12.00 degrees (positive = in)

   - Torpedo Bulkhead - Additional damage containing bulkheads:
  2.00" / 51 mm 480.00 ft / 146.30 m 33.00 ft / 10.06 m
 Beam between torpedo bulkheads 74.00 ft / 22.56 m

   - Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
 Main: 8.00" / 203 mm 6.00" / 152 mm  8.00" / 203 mm
 2nd: 4.00" / 102 mm 3.00" / 76 mm  4.00" / 102 mm

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

   - Conning towers: Forward 8.00" / 203 mm, Aft 6.00" / 152 mm

Machinery:
 Oil fired boilers, steam turbines, 
 Geared drive, 6 shafts, 383,549 shp / 286,127 Kw = 38.00 kts
 Range 4,800nm at 15.00 kts
 Bunker at max displacement = 3,253 tons

Complement:
 1,565 - 2,035

Cost:
 £7.601 million / $30.406 million

Distribution of weights at normal displacement:
 Armament: 2,467 tons, 5.4 %
    - Guns: 2,467 tons, 5.4 %
 Armour: 7,463 tons, 16.3 %
    - Belts: 1,495 tons, 3.3 %
    - Torpedo bulkhead: 1,172 tons, 2.6 %
    - Armament: 2,075 tons, 4.5 %
    - Armour Deck: 2,334 tons, 5.1 %
    - Conning Towers: 386 tons, 0.8 %
 Machinery: 12,819 tons, 28.0 %
 Hull, fittings & equipment: 19,567 tons, 42.7 %
 Fuel, ammunition & stores: 3,486 tons, 7.6 %
 Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
 Survivability (Non-critical penetrating hits needed to sink ship):
   41,045 lbs / 18,618 Kg = 18.3 x 16.5 " / 419 mm shells or 4.4 torpedoes
 Stability (Unstable if below 1.00): 1.16
 Metacentric height 7.0 ft / 2.1 m
 Roll period: 16.5 seconds
 Steadiness - As gun platform (Average = 50 %): 51 %
   - Recoil effect (Restricted arc if above 1.00): 0.75
 Seaboat quality  (Average = 1.00): 1.02

Hull form characteristics:
 Hull has low quarterdeck ,
   an extended bulbous bow and a cruiser stern
 Block coefficient (normal/deep): 0.532 / 0.536
 Length to Beam Ratio: 8.44 : 1
 'Natural speed' for length: 29.63 kts
 Power going to wave formation at top speed: 59 %
 Trim (Max stability = 0, Max steadiness = 100): 50
 Bow angle (Positive = bow angles forward): 12.00 degrees
 Stern overhang: -2.00 ft / -0.61 m
 Freeboard (% = length of deck as a percentage of waterline length):
    Fore end,  Aft end
    - Forecastle: 20.00 %,  37.00 ft / 11.28 m,  34.00 ft / 10.36 m
    - Forward deck: 30.00 %,  34.00 ft / 10.36 m,  33.00 ft / 10.06 m
    - Aft deck: 22.00 %,  33.00 ft / 10.06 m,  33.00 ft / 10.06 m
    - Quarter deck: 28.00 %,  25.00 ft / 7.62 m,  25.00 ft / 7.62 m
    - Average freeboard:  31.35 ft / 9.56 m

Ship space, strength and comments:
 Space - Hull below water (magazines/engines, low = better): 165.1 %
  - Above water (accommodation/working, high = better): 253.9 %
 Waterplane Area: 62,662 Square feet or 5,822 Square metres
 Displacement factor (Displacement / loading): 99 %
 Structure weight / hull surface area: 212 lbs/sq ft or 1,035 Kg/sq metre
 Hull strength (Relative):
  - Cross-sectional: 0.95
  - Longitudinal: 1.64
  - Overall: 1.00
 Cramped machinery, storage, compartmentation space
 Excellent accommodation and workspace room

I still like the Ger/CB/1912 photograph

I am using this picture as the desktop background on my work laptop. I had forgotten how much I like the picture.

A tweaked version of the Ger/BB/1906 photo

This is a slightly updated version of the Ger/BB/1906 (or is it 1905?) photo.

Oops, the Ger/BB/1906 with coal on board

I reader pointed out that I had neglected to give the Ger/BB/1906 battleship design a range and the associated coal in bunkers. Last night, I reran Springsharp to correct the problem:

Ger/BB/1906, Germany Battleship laid down 1906

Displacement:
 17,607 t light; 18,485 t standard; 21,014 t normal; 23,038 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
 (489.00 ft / 489.00 ft) x 89.00 ft x (26.00 / 28.12 ft)
 (149.05 m / 149.05 m) x 27.13 m  x (7.92 / 8.57 m)

Armament:
      8 - 12.00" / 305 mm 45.0 cal guns - 871.38lbs / 395.25kg shells, 90 per gun
   Breech loading guns in turret on barbette mounts, 1906 Model
   4 x Twin mounts on centreline ends, evenly spread
  2 raised mounts - superfiring
      12 - 6.00" / 152 mm 45.0 cal guns - 108.93lbs / 49.41kg shells, 150 per gun
   Quick firing guns in casemate mounts, 1906 Model
   12 x Single mounts on sides, evenly spread
      Weight of broadside 8,278 lbs / 3,755 kg

Armour:
   - Belts:  Width (max) Length (avg)  Height (avg)
 Main: 12.0" / 305 mm 325.00 ft / 99.06 m 8.00 ft / 2.44 m
 Ends: 5.00" / 127 mm 164.00 ft / 49.99 m 12.00 ft / 3.66 m
 Upper: 8.00" / 203 mm 325.00 ft / 99.06 m 8.00 ft / 2.44 m
   Main Belt covers 102 % of normal length

   - Torpedo Bulkhead - Additional damage containing bulkheads:
  1.50" / 38 mm 320.00 ft / 97.54 m 26.00 ft / 7.92 m
 Beam between torpedo bulkheads 59.00 ft / 17.98 m

   - Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
 Main: 12.0" / 305 mm 8.00" / 203 mm  12.0" / 305 mm
 2nd: 6.00" / 152 mm 4.00" / 102 mm  6.00" / 152 mm

   - Armoured deck - multiple decks:
 For and Aft decks: 3.00" / 76 mm
 Forecastle: 2.00" / 51 mm  Quarter deck: 2.00" / 51 mm

   - Conning towers: Forward 12.00" / 305 mm, Aft 8.00" / 203 mm

Machinery:
 Coal fired boilers, steam turbines, 
 Direct drive, 4 shafts, 30,859 shp / 23,021 Kw = 21.00 kts
 Range 4,200nm at 15.00 kts
 Bunker at max displacement = 4,553 tons (100% coal)

Complement:
 872 - 1,134

Cost:
 £1.637 million / $6.549 million

Distribution of weights at normal displacement:
 Armament: 1,462 tons, 7.0 %
    - Guns: 1,462 tons, 7.0 %
 Armour: 7,294 tons, 34.7 %
    - Belts: 2,691 tons, 12.8 %
    - Torpedo bulkhead: 462 tons, 2.2 %
    - Armament: 2,112 tons, 10.1 %
    - Armour Deck: 1,701 tons, 8.1 %
    - Conning Towers: 328 tons, 1.6 %
 Machinery: 2,204 tons, 10.5 %
 Hull, fittings & equipment: 6,647 tons, 31.6 %
 Fuel, ammunition & stores: 3,407 tons, 16.2 %
 Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
 Survivability (Non-critical penetrating hits needed to sink ship):
   33,257 lbs / 15,085 Kg = 38.5 x 12.0 " / 305 mm shells or 5.7 torpedoes
 Stability (Unstable if below 1.00): 1.23
 Metacentric height 6.1 ft / 1.9 m
 Roll period: 15.1 seconds
 Steadiness - As gun platform (Average = 50 %): 68 %
   - Recoil effect (Restricted arc if above 1.00): 0.53
 Seaboat quality  (Average = 1.00): 1.35

Hull form characteristics:
 Hull has a flush deck,
   a normal bow and a cruiser stern
 Block coefficient (normal/deep): 0.650 / 0.659
 Length to Beam Ratio: 5.49 : 1
 'Natural speed' for length: 22.11 kts
 Power going to wave formation at top speed: 52 %
 Trim (Max stability = 0, Max steadiness = 100): 50
 Bow angle (Positive = bow angles forward): 0.00 degrees
 Stern overhang: -3.00 ft / -0.91 m
 Freeboard (% = length of deck as a percentage of waterline length):
    Fore end,  Aft end
    - Forecastle: 25.00 %,  24.00 ft / 7.32 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: 25.00 %,  19.00 ft / 5.79 m,  18.00 ft / 5.49 m
    - Quarter deck: 20.00 %,  18.00 ft / 5.49 m,  17.50 ft / 5.33 m
    - Average freeboard:  19.73 ft / 6.01 m
 Ship tends to be wet forward

Ship space, strength and comments:
 Space - Hull below water (magazines/engines, low = better): 98.7 %
  - Above water (accommodation/working, high = better): 140.7 %
 Waterplane Area: 33,340 Square feet or 3,097 Square metres
 Displacement factor (Displacement / loading): 114 %
 Structure weight / hull surface area: 159 lbs/sq ft or 774 Kg/sq metre
 Hull strength (Relative):
  - Cross-sectional: 0.93
  - Longitudinal: 1.85
  - Overall: 1.00
 Adequate machinery, storage, compartmentation space
 Excellent accommodation and workspace room
 Good seaboat, rides out heavy weather easily

Why does this look so good? The Ger/BB/1906 design

The flush-decked, imaginery German battleship Ger/BB/1906 is still one of my favorite designs. I just tried the ship in Springsharp and I was surprised how good the ship is:

Ger/BB/1906, Germany Battleship laid down 1906

Displacement:
 17,273 t light; 18,095 t standard; 18,186 t normal; 18,258 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
 (489.00 ft / 489.00 ft) x 89.00 ft x (25.00 / 25.08 ft)
 (149.05 m / 149.05 m) x 27.13 m  x (7.62 / 7.64 m)

Armament:
      8 - 12.00" / 305 mm 45.0 cal guns - 871.37lbs / 395.24kg shells, 90 per gun
   Breech loading guns in turret on barbette mounts, 1906 Model
   4 x Twin mounts on centreline ends, evenly spread
  2 raised mounts - superfiring
      12 - 6.00" / 152 mm 45.0 cal guns - 108.92lbs / 49.41kg shells, 150 per gun
   Quick firing guns in casemate mounts, 1906 Model
   12 x Single mounts on sides, evenly spread
      Weight of broadside 8,278 lbs / 3,755 kg

Armour:
   - Belts:  Width (max) Length (avg)  Height (avg)
 Main: 12.0" / 305 mm 325.00 ft / 99.06 m 8.00 ft / 2.44 m
 Ends: 5.00" / 127 mm 164.00 ft / 49.99 m 12.00 ft / 3.66 m
 Upper: 8.00" / 203 mm 325.00 ft / 99.06 m 8.00 ft / 2.44 m
   Main Belt covers 102 % of normal length
   Main belt does not fully cover magazines and engineering spaces

   - Torpedo Bulkhead - Additional damage containing bulkheads:
  1.50" / 38 mm 320.00 ft / 97.54 m 25.00 ft / 7.62 m
 Beam between torpedo bulkheads 59.00 ft / 17.98 m

   - Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
 Main: 12.0" / 305 mm 8.00" / 203 mm  12.0" / 305 mm
 2nd: 6.00" / 152 mm 4.00" / 102 mm  6.00" / 152 mm

   - Armoured deck - multiple decks:
 For and Aft decks: 3.00" / 76 mm
 Forecastle: 2.00" / 51 mm  Quarter deck: 2.00" / 51 mm

   - Conning towers: Forward 12.00" / 305 mm, Aft 8.00" / 203 mm

Machinery:
 Coal fired boilers, steam turbines, 
 Direct drive, 4 shafts, 27,560 shp / 20,560 Kw = 21.00 kts
 Range 0nm at 15.00 kts
 Bunker at max displacement = 164 tons (100% coal)

Complement:
 782 - 1,017

Cost:
 £1.593 million / $6.370 million

Distribution of weights at normal displacement:
 Armament: 1,462 tons, 8.0 %
    - Guns: 1,462 tons, 8.0 %
 Armour: 7,192 tons, 39.5 %
    - Belts: 2,678 tons, 14.7 %
    - Torpedo bulkhead: 444 tons, 2.4 %
    - Armament: 2,173 tons, 11.9 %
    - Armour Deck: 1,600 tons, 8.8 %
    - Conning Towers: 298 tons, 1.6 %
 Machinery: 1,969 tons, 10.8 %
 Hull, fittings & equipment: 6,651 tons, 36.6 %
 Fuel, ammunition & stores: 912 tons, 5.0 %
 Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
 Survivability (Non-critical penetrating hits needed to sink ship):
   27,378 lbs / 12,418 Kg = 31.7 x 12.0 " / 305 mm shells or 4.8 torpedoes
 Stability (Unstable if below 1.00): 1.15
 Metacentric height 5.5 ft / 1.7 m
 Roll period: 16.0 seconds
 Steadiness - As gun platform (Average = 50 %): 71 %
   - Recoil effect (Restricted arc if above 1.00): 0.63
 Seaboat quality  (Average = 1.00): 1.43

Hull form characteristics:
 Hull has a flush deck,
   a normal bow and a cruiser stern
 Block coefficient (normal/deep): 0.585 / 0.585
 Length to Beam Ratio: 5.49 : 1
 'Natural speed' for length: 22.11 kts
 Power going to wave formation at top speed: 50 %
 Trim (Max stability = 0, Max steadiness = 100): 50
 Bow angle (Positive = bow angles forward): 0.00 degrees
 Stern overhang: -3.00 ft / -0.91 m
 Freeboard (% = length of deck as a percentage of waterline length):
    Fore end,  Aft end
    - Forecastle: 25.00 %,  25.00 ft / 7.62 m,  22.00 ft / 6.71 m
    - Forward deck: 30.00 %,  22.00 ft / 6.71 m,  20.00 ft / 6.10 m
    - Aft deck: 25.00 %,  20.00 ft / 6.10 m,  19.00 ft / 5.79 m
    - Quarter deck: 20.00 %,  19.00 ft / 5.79 m,  18.50 ft / 5.64 m
    - Average freeboard:  20.73 ft / 6.32 m

Ship space, strength and comments:
 Space - Hull below water (magazines/engines, low = better): 107.3 %
  - Above water (accommodation/working, high = better): 155.3 %
 Waterplane Area: 31,387 Square feet or 2,916 Square metres
 Displacement factor (Displacement / loading): 102 %
 Structure weight / hull surface area: 166 lbs/sq ft or 812 Kg/sq metre
 Hull strength (Relative):
  - Cross-sectional: 0.92
  - Longitudinal: 2.00
  - Overall: 1.00
 Adequate machinery, storage, compartmentation space
 Excellent accommodation and workspace room
 Ship has slow, easy roll, a good, steady gun platform
 Good seaboat, rides out heavy weather easily

My 1905 British fast battleship

Instead of building 21 knot battleships and 25 knot armoured cruisers, why not just build 24 knot fast battleships? That is the premise of my GB/BB/1905 design that has 8-12in/45 and 16-4in QF guns and a 11in belt. "Just for fun," I have a photograph of one, as well! This is the Springsharp report:

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

Displacement:
 19,173 t light; 20,005 t standard; 22,462 t normal; 24,429 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
 (613.00 ft / 605.00 ft) x 84.00 ft x (26.00 / 27.86 ft)
 (186.84 m / 184.40 m) x 25.60 m  x (7.92 / 8.49 m)

Armament:
      8 - 12.00" / 305 mm 45.0 cal guns - 849.99lbs / 385.55kg shells, 90 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
      16 - 4.00" / 102 mm 45.0 cal guns - 32.00lbs / 14.51kg shells, 150 per gun
   Quick firing guns in deck and hoist mounts, 1905 Model
   16 x Single mounts on sides, evenly spread
  8 raised mounts
      Weight of broadside 7,312 lbs / 3,317 kg

Armour:
   - Belts:  Width (max) Length (avg)  Height (avg)
 Main: 11.0" / 279 mm 400.00 ft / 121.92 m 9.00 ft / 2.74 m
 Ends: 4.00" / 102 mm 180.00 ft / 54.86 m 12.00 ft / 3.66 m
   25.00 ft / 7.62 m Unarmoured ends
 Upper: 8.00" / 203 mm 400.00 ft / 121.92 m 8.00 ft / 2.44 m
   Main Belt covers 102 % of normal length

   - Torpedo Bulkhead - Strengthened structural bulkheads:
  1.50" / 38 mm 400.00 ft / 121.92 m 27.00 ft / 8.23 m
 Beam between torpedo bulkheads 58.00 ft / 17.68 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: 4.00" / 102 mm 3.00" / 76 mm  4.00" / 102 mm

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

   - Conning towers: Forward 11.00" / 279 mm, Aft 8.00" / 203 mm

Machinery:
 Coal fired boilers, steam turbines, 
 Direct drive, 4 shafts, 47,823 shp / 35,676 Kw = 24.00 kts
 Range 4,800nm at 15.00 kts
 Bunker at max displacement = 4,424 tons (100% coal)

Complement:
 916 - 1,192

Cost:
 £1.706 million / $6.826 million

Distribution of weights at normal displacement:
 Armament: 1,382 tons, 6.2 %
    - Guns: 1,382 tons, 6.2 %
 Armour: 7,774 tons, 34.6 %
    - Belts: 3,108 tons, 13.8 %
    - Torpedo bulkhead: 599 tons, 2.7 %
    - Armament: 2,362 tons, 10.5 %
    - Armour Deck: 1,378 tons, 6.1 %
    - Conning Towers: 326 tons, 1.5 %
 Machinery: 2,391 tons, 10.6 %
 Hull, fittings & equipment: 7,626 tons, 33.9 %
 Fuel, ammunition & stores: 3,290 tons, 14.6 %
 Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
 Survivability (Non-critical penetrating hits needed to sink ship):
   39,707 lbs / 18,011 Kg = 46.0 x 12.0 " / 305 mm shells or 6.4 torpedoes
 Stability (Unstable if below 1.00): 1.06
 Metacentric height 4.3 ft / 1.3 m
 Roll period: 16.9 seconds
 Steadiness - As gun platform (Average = 50 %): 76 %
   - Recoil effect (Restricted arc if above 1.00): 0.90
 Seaboat quality  (Average = 1.00): 1.51

Hull form characteristics:
 Hull has low quarterdeck ,
   a ram bow and a cruiser stern
 Block coefficient (normal/deep): 0.595 / 0.604
 Length to Beam Ratio: 7.20 : 1
 'Natural speed' for length: 24.60 kts
 Power going to wave formation at top speed: 48 %
 Trim (Max stability = 0, Max steadiness = 100): 50
 Bow angle (Positive = bow angles forward): -3.00 degrees
 Stern overhang: -2.00 ft / -0.61 m
 Freeboard (% = length of deck as a percentage of waterline length):
    Fore end,  Aft end
    - Forecastle: 20.00 %,  27.00 ft / 8.23 m,  25.00 ft / 7.62 m
    - Forward deck: 30.00 %,  25.00 ft / 7.62 m,  25.00 ft / 7.62 m
    - Aft deck: 22.00 %,  25.00 ft / 7.62 m,  25.00 ft / 7.62 m
    - Quarter deck: 28.00 %,  17.00 ft / 5.18 m,  17.00 ft / 5.18 m
    - Average freeboard:  22.92 ft / 6.99 m
 Ship tends to be wet forward

Ship space, strength and comments:
 Space - Hull below water (magazines/engines, low = better): 91.5 %
  - Above water (accommodation/working, high = better): 192.3 %
 Waterplane Area: 36,996 Square feet or 3,437 Square metres
 Displacement factor (Displacement / loading): 117 %
 Structure weight / hull surface area: 161 lbs/sq ft or 788 Kg/sq metre
 Hull strength (Relative):
  - Cross-sectional: 0.95
  - Longitudinal: 1.57
  - Overall: 1.00
 Adequate machinery, storage, compartmentation space
 Excellent accommodation and workspace room
 Ship has slow, easy roll, a good, steady gun platform
 Excellent seaboat, comfortable, can fire her guns in the heaviest weather