Another look at the British semi-Dreadnought: GB/BB/1903

The British almost built a class of battleships that were in the "semi-Dreadnought" category. They would have carried 4-12in and 12-9.2in guns. They were what the Lord Nelson and Agamenon should have been. This is the Springsharp report:

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

Displacement:
 18,189 t light; 19,180 t standard; 21,093 t normal; 22,623 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
 (483.00 ft / 475.00 ft) x 82.00 ft x (27.00 / 28.71 ft)
 (147.22 m / 144.78 m) x 24.99 m  x (8.23 / 8.75 m)

Armament:
      4 - 12.00" / 305 mm 45.0 cal guns - 850.00lbs / 385.55kg shells, 90 per gun
   Breech loading guns in turret on barbette mounts, 1903 Model
   2 x Twin mounts on centreline ends, evenly spread
      12 - 9.20" / 234 mm 50.0 cal guns - 380.00lbs / 172.37kg shells, 150 per gun
   Breech loading guns in turret on barbette mounts, 1903 Model
   6 x Twin mounts on sides, evenly spread
      16 - 3.00" / 76.2 mm 50.0 cal guns - 14.29lbs / 6.48kg shells, 150 per gun
   Quick firing guns in deck and hoist mounts, 1903 Model
   16 x Single mounts on sides, evenly spread
  16 raised mounts
      Weight of broadside 8,189 lbs / 3,714 kg

Armour:
   - Belts:  Width (max) Length (avg)  Height (avg)
 Main: 12.0" / 305 mm 315.00 ft / 96.01 m 9.00 ft / 2.74 m
 Ends: 5.00" / 127 mm 160.00 ft / 48.77 m 16.00 ft / 4.88 m
 Upper: 9.00" / 229 mm 315.00 ft / 96.01 m 8.00 ft / 2.44 m
   Main Belt covers 102 % of normal length

   - Torpedo Bulkhead - Additional damage containing bulkheads:
  2.00" / 51 mm 315.00 ft / 96.01 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: 12.0" / 305 mm 9.00" / 229 mm  12.0" / 305 mm
 2nd: 10.0" / 254 mm 7.00" / 178 mm  10.0" / 254 mm
 3rd: 2.00" / 51 mm 2.00" / 51 mm  2.00" / 51 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 9.00" / 229 mm

Machinery:
 Coal fired boilers, complex reciprocating steam engines, 
 Direct drive, 4 shafts, 21,257 ihp / 15,857 Kw = 19.00 kts
 Range 4,500nm at 14.00 kts
 Bunker at max displacement = 3,443 tons (100% coal)

Complement:
 874 - 1,137

Cost:
 £1.772 million / $7.089 million

Distribution of weights at normal displacement:
 Armament: 1,918 tons, 9.1 %
    - Guns: 1,918 tons, 9.1 %
 Armour: 8,378 tons, 39.7 %
    - Belts: 3,019 tons, 14.3 %
    - Torpedo bulkhead: 629 tons, 3.0 %
    - Armament: 2,635 tons, 12.5 %
    - Armour Deck: 1,749 tons, 8.3 %
    - Conning Towers: 345 tons, 1.6 %
 Machinery: 1,932 tons, 9.2 %
 Hull, fittings & equipment: 5,961 tons, 28.3 %
 Fuel, ammunition & stores: 2,904 tons, 13.8 %
 Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
 Survivability (Non-critical penetrating hits needed to sink ship):
   30,266 lbs / 13,728 Kg = 35.0 x 12.0 " / 305 mm shells or 5.1 torpedoes
 Stability (Unstable if below 1.00): 1.12
 Metacentric height 4.6 ft / 1.4 m
 Roll period: 16.1 seconds
 Steadiness - As gun platform (Average = 50 %): 79 %
   - Recoil effect (Restricted arc if above 1.00): 0.76
 Seaboat quality  (Average = 1.00): 1.59

Hull form characteristics:
 Hull has a flush deck,
   a ram bow and a cruiser stern
 Block coefficient (normal/deep): 0.702 / 0.708
 Length to Beam Ratio: 5.79 : 1
 'Natural speed' for length: 21.79 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 %,  22.00 ft / 6.71 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,  20.00 ft / 6.10 m
    - Quarter deck: 20.00 %,  20.00 ft / 6.10 m,  21.00 ft / 6.40 m
    - Average freeboard:  20.23 ft / 6.17 m
 Ship tends to be wet forward

Ship space, strength and comments:
 Space - Hull below water (magazines/engines, low = better): 95.4 %
  - Above water (accommodation/working, high = better): 134.6 %
 Waterplane Area: 31,275 Square feet or 2,906 Square metres
 Displacement factor (Displacement / loading): 103 %
 Structure weight / hull surface area: 154 lbs/sq ft or 752 Kg/sq metre
 Hull strength (Relative):
  - Cross-sectional: 0.93
  - Longitudinal: 1.93
  - 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

A well-protected battlecruiser: GB/CB/1905

I still do not see any reason why there could not be a well-protected British battlecruiser laid down in 1905. The ship has coal-fired boilers and direct-drive turbines. The belt is 10in and the deck in 3in. The four turrets are distributed on the centerline, with one forward and one aft. The 16-4in QF guns are stacked casemates with 4in protection. The speed is 25 knots. This is the Springsharp report:

GB/CB/1905, Great Britain Battlecruiser laid down 1905 (Engine 1909)

Displacement:
 20,474 t light; 21,583 t standard; 24,985 t normal; 27,707 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
 (642.00 ft / 634.00 ft) x 82.00 ft x (27.00 / 29.45 ft)
 (195.68 m / 193.24 m) x 24.99 m  x (8.23 / 8.98 m)

Armament:
      8 - 12.00" / 305 mm 45.0 cal guns - 850.00lbs / 385.55kg shells, 150 per gun
   Breech loading guns in turret on barbette mounts, 1905 Model
   4 x Twin mounts on centreline, evenly spread
      16 - 4.00" / 102 mm 45.0 cal guns - 32.00lbs / 14.51kg shells, 150 per gun
   Breech loading guns in casemate 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: 10.0" / 254 mm 420.00 ft / 128.02 m 9.00 ft / 2.74 m
 Ends: 4.00" / 102 mm 114.00 ft / 34.75 m 12.00 ft / 3.66 m
   100.00 ft / 30.48 m Unarmoured ends
 Upper: 7.00" / 178 mm 420.00 ft / 128.02 m 8.00 ft / 2.44 m
   Main Belt covers 102 % of normal length

   - Torpedo Bulkhead - Additional damage containing bulkheads:
  2.00" / 51 mm 420.00 ft / 128.02 m 27.00 ft / 8.23 m
 Beam between torpedo bulkheads 62.00 ft / 18.90 m

   - Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
 Main: 10.0" / 254 mm 8.00" / 203 mm  10.0" / 254 mm
 2nd: 4.00" / 102 mm 4.00" / 102 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 10.00" / 254 mm, Aft 7.00" / 178 mm

Machinery:
 Coal fired boilers, steam turbines, 
 Direct drive, 4 shafts, 58,942 shp / 43,971 Kw = 25.00 kts
 Range 5,400nm at 16.00 kts
 Bunker at max displacement = 6,124 tons (100% coal)

Complement:
 993 - 1,291

Cost:
 £1.805 million / $7.219 million

Distribution of weights at normal displacement:
 Armament: 1,320 tons, 5.3 %
    - Guns: 1,320 tons, 5.3 %
 Armour: 8,087 tons, 32.4 %
    - Belts: 2,801 tons, 11.2 %
    - Torpedo bulkhead: 839 tons, 3.4 %
    - Armament: 1,964 tons, 7.9 %
    - Armour Deck: 2,170 tons, 8.7 %
    - Conning Towers: 313 tons, 1.3 %
 Machinery: 2,947 tons, 11.8 %
 Hull, fittings & equipment: 8,119 tons, 32.5 %
 Fuel, ammunition & stores: 4,511 tons, 18.1 %
 Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
 Survivability (Non-critical penetrating hits needed to sink ship):
   45,024 lbs / 20,422 Kg = 52.1 x 12.0 " / 305 mm shells or 6.8 torpedoes
 Stability (Unstable if below 1.00): 1.16
 Metacentric height 4.9 ft / 1.5 m
 Roll period: 15.5 seconds
 Steadiness - As gun platform (Average = 50 %): 80 %
   - Recoil effect (Restricted arc if above 1.00): 0.77
 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): 0.623 / 0.633
 Length to Beam Ratio: 7.73 : 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: -2.00 ft / -0.61 m
 Freeboard (% = length of deck as a percentage of waterline length):
    Fore end,  Aft end
    - Forecastle: 25.00 %,  27.00 ft / 8.23 m,  26.00 ft / 7.92 m
    - Forward deck: 30.00 %,  26.00 ft / 7.92 m,  26.00 ft / 7.92 m
    - Aft deck: 17.00 %,  26.00 ft / 7.92 m,  26.00 ft / 7.92 m
    - Quarter deck: 28.00 %,  18.00 ft / 5.49 m,  18.00 ft / 5.49 m
    - Average freeboard:  23.86 ft / 7.27 m
 Ship tends to be wet forward

Ship space, strength and comments:
 Space - Hull below water (magazines/engines, low = better): 85.0 %
  - Above water (accommodation/working, high = better): 193.7 %
 Waterplane Area: 38,846 Square feet or 3,609 Square metres
 Displacement factor (Displacement / loading): 122 %
 Structure weight / hull surface area: 148 lbs/sq ft or 723 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

I am a bit disappointed with the latest Springsharp beta

The latest Springsharp beta still does not allow me to have higher power output machinery. As far back as a 1905 design (HMS Swift), the British were able to achieve a 60 SHP/ton of machinery weight propulsion plant. Admittedly, that was with the machinery being stressed, but I do not believe overly so. I cannot find a way to do better than 50 SHP/ton and I believe that the power required is too great for the size of ship. All you have to do is consult a Conways and look at the British Tribal class destroyerss bujild from 1937 and later. For a nominal 44,000 SHP, the could reach a nominal speed of 36.25 to 36.5 knots. For a comparably-sized ship, Springsharp requires an absurd 78,440 SHP to reach 37 knots. This is the Springsharp report:

Super Swift, Great Britain Scout Cruiser laid down 1912 (Engine 1950)

Displacement:
 2,225 t light; 2,291 t standard; 2,445 t normal; 2,568 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
 (380.73 ft / 378.00 ft) x 37.00 ft x (13.75 / 14.24 ft)
 (116.05 m / 115.21 m) x 11.28 m  x (4.19 / 4.34 m)

Armament:
      6 - 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
   2 x Single mounts on centreline ends, evenly spread
   4 x Single mounts on sides, forward deck aft
      Weight of broadside 203 lbs / 92 kg
      Main Torpedoes
      2 - 18.0" / 457 mm, 21.00 ft / 6.40 m torpedoes - 0.905 t each, 1.810 t total
 In 2 sets of deck mounted centre 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

Machinery:
 Oil fired boilers, steam turbines, 
 Direct drive, 2 shafts, 78,440 shp / 58,517 Kw = 37.00 kts
 Range 3,750nm at 14.00 kts
 Bunker at max displacement = 277 tons

Complement:
 173 - 226

Cost:
 £0.304 million / $1.216 million

Distribution of weights at normal displacement:
 Armament: 66 tons, 2.7 %
    - Guns: 62 tons, 2.6 %
    - Weapons: 4 tons, 0.1 %
 Armour: 37 tons, 1.5 %
    - Armament: 37 tons, 1.5 %
 Machinery: 1,460 tons, 59.7 %
 Hull, fittings & equipment: 662 tons, 27.1 %
 Fuel, ammunition & stores: 220 tons, 9.0 %
 Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
 Survivability (Non-critical penetrating hits needed to sink ship):
   510 lbs / 232 Kg = 15.9 x 4.0 " / 102 mm shells or 0.4 torpedoes
 Stability (Unstable if below 1.00): 1.31
 Metacentric height 1.8 ft / 0.6 m
 Roll period: 11.5 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 rise forward of midbreak,
   a normal bow and a round stern
 Block coefficient (normal/deep): 0.445 / 0.451
 Length to Beam Ratio: 10.22 : 1
 'Natural speed' for length: 19.44 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: 16.00 %,  26.00 ft / 7.92 m,  24.00 ft / 7.32 m
    - Forward deck: 18.00 %,  24.00 ft / 7.32 m,  24.00 ft / 7.32 m
    - Aft deck: 51.00 %,  16.00 ft / 4.88 m,  16.00 ft / 4.88 m
    - Quarter deck: 15.00 %,  16.00 ft / 4.88 m,  16.00 ft / 4.88 m
    - Average freeboard:  18.85 ft / 5.74 m

Ship space, strength and comments:
 Space - Hull below water (magazines/engines, low = better): 200.6 %
  - Above water (accommodation/working, high = better): 145.1 %
 Waterplane Area: 8,885 Square feet or 825 Square metres
 Displacement factor (Displacement / loading): 61 %
 Structure weight / hull surface area: 34 lbs/sq ft or 167 Kg/sq metre
 Hull strength (Relative):
  - Cross-sectional: 0.42
  - Longitudinal: 2.79
  - Overall: 0.51
 Extremely poor machinery, storage, compartmentation space
 Excellent accommodation and workspace room

The battlecruiser analog of the GB/BB/1906: the GB/CB/1906

The battlecruiser version of the GB/BB/1906 naturally has lighter armour and higher speed. The lower belt is still 8in thick, so it is not another Invincible. The speed is also higher at 27 knots (although I had heard that an invincible might be able to make higher speed). The ships have 8-12in/45 and 16-4in QF guns. This is the Springsharp report:

\GB/BB/1906, Great Britain Battlecruiser laid down 1906 (Engine 1911)

Displacement:
 20,854 t light; 21,808 t standard; 26,192 t normal; 29,700 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
 (645.00 ft / 638.00 ft) x 82.00 ft x (27.00 / 30.07 ft)
 (196.60 m / 194.46 m) x 24.99 m  x (8.23 / 9.16 m)

Armament:
      8 - 12.00" / 305 mm 45.0 cal guns - 871.37lbs / 395.24kg shells, 100 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
      16 - 4.00" / 102 mm 45.0 cal guns - 32.27lbs / 14.64kg shells, 150 per gun
   Quick firing guns in casemate mounts, 1906 Model
   16 x Single mounts on sides, evenly spread
  8 raised mounts
      Weight of broadside 7,487 lbs / 3,396 kg

Armour:
   - Belts:  Width (max) Length (avg)  Height (avg)
 Main: 8.00" / 203 mm 430.00 ft / 131.06 m 9.00 ft / 2.74 m
 Ends: Unarmoured
 Upper: 6.00" / 152 mm 430.00 ft / 131.06 m 8.00 ft / 2.44 m
   Main Belt covers 104 % of normal length

   - Torpedo Bulkhead - Additional damage containing bulkheads:
  2.00" / 51 mm 430.00 ft / 131.06 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: 10.0" / 254 mm 8.00" / 203 mm  10.0" / 254 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 11.00" / 279 mm, Aft 8.00" / 203 mm

Machinery:
 Coal fired boilers, steam turbines, 
 Direct drive, 4 shafts, 82,731 shp / 61,717 Kw = 27.00 kts
 Range 7,500nm at 16.00 kts
 Bunker at max displacement = 7,891 tons (100% coal)

Complement:
 1,029 - 1,338

Cost:
 £1.923 million / $7.691 million

Distribution of weights at normal displacement:
 Armament: 1,331 tons, 5.1 %
    - Guns: 1,331 tons, 5.1 %
 Armour: 7,070 tons, 27.0 %
    - Belts: 2,188 tons, 8.4 %
    - Torpedo bulkhead: 859 tons, 3.3 %
    - Armament: 2,171 tons, 8.3 %
    - Armour Deck: 1,491 tons, 5.7 %
    - Conning Towers: 361 tons, 1.4 %
 Machinery: 3,693 tons, 14.1 %
 Hull, fittings & equipment: 8,759 tons, 33.4 %
 Fuel, ammunition & stores: 5,338 tons, 20.4 %
 Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
 Survivability (Non-critical penetrating hits needed to sink ship):
   42,557 lbs / 19,303 Kg = 49.3 x 12.0 " / 305 mm shells or 6.1 torpedoes
 Stability (Unstable if below 1.00): 1.12
 Metacentric height 4.6 ft / 1.4 m
 Roll period: 16.0 seconds
 Steadiness - As gun platform (Average = 50 %): 65 %
   - Recoil effect (Restricted arc if above 1.00): 0.82
 Seaboat quality  (Average = 1.00): 1.29

Hull form characteristics:
 Hull has low quarterdeck ,
   a ram bow and a cruiser stern
 Block coefficient (normal/deep): 0.649 / 0.661
 Length to Beam Ratio: 7.78 : 1
 'Natural speed' for length: 25.26 kts
 Power going to wave formation at top speed: 53 %
 Trim (Max stability = 0, Max steadiness = 100): 50
 Bow angle (Positive = bow angles forward): -3.00 degrees
 Stern overhang: -2.00 ft / -0.61 m
 Freeboard (% = length of deck as a percentage of waterline length):
    Fore end,  Aft end
    - Forecastle: 25.00 %,  29.00 ft / 8.84 m,  27.00 ft / 8.23 m
    - Forward deck: 30.00 %,  27.00 ft / 8.23 m,  26.00 ft / 7.92 m
    - Aft deck: 14.00 %,  26.00 ft / 7.92 m,  26.00 ft / 7.92 m
    - Quarter deck: 31.00 %,  18.00 ft / 5.49 m,  18.00 ft / 5.49 m
    - Average freeboard:  24.12 ft / 7.35 m

Ship space, strength and comments:
 Space - Hull below water (magazines/engines, low = better): 102.2 %
  - Above water (accommodation/working, high = better): 195.2 %
 Waterplane Area: 40,040 Square feet or 3,720 Square metres
 Displacement factor (Displacement / loading): 125 %
 Structure weight / hull surface area: 155 lbs/sq ft or 758 Kg/sq metre
 Hull strength (Relative):
  - Cross-sectional: 0.95
  - Longitudinal: 1.52
  - Overall: 1.00
 Adequate machinery, storage, compartmentation space
 Excellent accommodation and workspace room
 Good seaboat, rides out heavy weather easily

My 1906 British fast battleship

I have had a concept for a British fast battleship for 1906. The boilers are coal-fired and the machinery is direct-drive turbines. I like to use a good bit of length to achieve speed, to keep other characteristics in check. This is a ship with 8-12in/45 and 16-4in QF guns. The armour basis is 10in with a 2in deck. Since the tiny Michigan and South Carolina had superfiring guns, I figure that the ships should have them as well. The "all-or-nothing" armour scheme is rather edgy, I admit. This is the Springsharp report:

GB/BB/1906, Great Britain Battleship laid down 1906 (Engine 1911)

Displacement:
 19,696 t light; 20,703 t standard; 24,948 t normal; 28,343 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
 (635.00 ft / 628.00 ft) x 82.00 ft x (27.00 / 30.07 ft)
 (193.55 m / 191.41 m) x 24.99 m  x (8.23 / 9.17 m)

Armament:
      8 - 12.00" / 305 mm 45.0 cal guns - 871.37lbs / 395.24kg shells, 120 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
      16 - 4.00" / 102 mm 45.0 cal guns - 32.27lbs / 14.64kg shells, 150 per gun
   Quick firing guns in casemate mounts, 1906 Model
   16 x Single mounts on sides, evenly spread
  8 raised mounts
      Weight of broadside 7,487 lbs / 3,396 kg

Armour:
   - Belts:  Width (max) Length (avg)  Height (avg)
 Main: 10.0" / 254 mm 410.00 ft / 124.97 m 9.00 ft / 2.74 m
 Ends: Unarmoured
 Upper: 8.00" / 203 mm 410.00 ft / 124.97 m 8.00 ft / 2.44 m
   Main Belt covers 100 % of normal length

   - Torpedo Bulkhead - Additional damage containing bulkheads:
  2.00" / 51 mm 410.00 ft / 124.97 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: 11.0" / 279 mm 9.00" / 229 mm  11.0" / 279 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 11.00" / 279 mm, Aft 8.00" / 203 mm

Machinery:
 Coal fired boilers, steam turbines, 
 Direct drive, 4 shafts, 50,568 shp / 37,724 Kw = 24.00 kts
 Range 7,500nm at 16.00 kts
 Bunker at max displacement = 7,640 tons (100% coal)

Complement:
 992 - 1,290

Cost:
 £1.681 million / $6.724 million

Distribution of weights at normal displacement:
 Armament: 1,331 tons, 5.3 %
    - Guns: 1,331 tons, 5.3 %
 Armour: 7,625 tons, 30.6 %
    - Belts: 2,694 tons, 10.8 %
    - Torpedo bulkhead: 819 tons, 3.3 %
    - Armament: 2,323 tons, 9.3 %
    - Armour Deck: 1,439 tons, 5.8 %
    - Conning Towers: 349 tons, 1.4 %
 Machinery: 2,257 tons, 9.0 %
 Hull, fittings & equipment: 8,483 tons, 34.0 %
 Fuel, ammunition & stores: 5,251 tons, 21.0 %
 Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
 Survivability (Non-critical penetrating hits needed to sink ship):
   50,065 lbs / 22,709 Kg = 57.9 x 12.0 " / 305 mm shells or 8.4 torpedoes
 Stability (Unstable if below 1.00): 1.09
 Metacentric height 4.4 ft / 1.3 m
 Roll period: 16.5 seconds
 Steadiness - As gun platform (Average = 50 %): 81 %
   - Recoil effect (Restricted arc if above 1.00): 0.95
 Seaboat quality  (Average = 1.00): 1.63

Hull form characteristics:
 Hull has low quarterdeck ,
   a ram bow and a cruiser stern
 Block coefficient (normal/deep): 0.628 / 0.641
 Length to Beam Ratio: 7.66 : 1
 'Natural speed' for length: 25.06 kts
 Power going to wave formation at top speed: 47 %
 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: 25.00 %,  28.00 ft / 8.53 m,  26.00 ft / 7.92 m
    - Forward deck: 30.00 %,  26.00 ft / 7.92 m,  25.00 ft / 7.62 m
    - Aft deck: 14.00 %,  25.00 ft / 7.62 m,  25.00 ft / 7.62 m
    - Quarter deck: 31.00 %,  17.00 ft / 5.18 m,  17.00 ft / 5.18 m
    - Average freeboard:  23.12 ft / 7.05 m

Ship space, strength and comments:
 Space - Hull below water (magazines/engines, low = better): 80.7 %
  - Above water (accommodation/working, high = better): 188.1 %
 Waterplane Area: 38,657 Square feet or 3,591 Square metres
 Displacement factor (Displacement / loading): 134 %
 Structure weight / hull surface area: 157 lbs/sq ft or 765 Kg/sq metre
 Hull strength (Relative):
  - Cross-sectional: 0.96
  - 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

GB/CB/1914: my first Springsharp 3.0 3rd Beta design

I finally downloaded the third Springsharp 3.0 3rd Beta version. I decided to try the large, fast battlecruiser with 12in armour: the GB/CB/1914. This is a design that is more archaic looking than the Hood, but a stronger and more heavily armed ship:

GB/CB/1914, Great Britain Battlecruiser laid down 1914 (Engine 1921)

Displacement:
 40,459 t light; 42,785 t standard; 45,940 t normal; 48,465 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
 (821.00 ft / 814.00 ft) x 108.00 ft x (31.00 / 32.39 ft)
 (250.24 m / 248.11 m) x 32.92 m  x (9.45 / 9.87 m)

Armament:
      10 - 15.00" / 381 mm 42.0 cal guns - 1,920.01lbs / 870.90kg shells, 120 per gun
   Breech loading guns in turret on barbette mounts, 1914 Model
   4 x Twin mounts on centreline ends, evenly spread
  2 raised mounts - superfiring
   1 x Twin mount on centreline, forward deck aft
      14 - 6.00" / 152 mm 45.0 cal guns - 108.93lbs / 49.41kg shells, 150 per gun
   Quick firing guns in casemate mounts, 1914 Model
   14 x Single mounts on sides, evenly spread
  14 hull mounts in casemates- Limited use in heavy seas
      Weight of broadside 20,725 lbs / 9,401 kg

Armour:
   - Belts:  Width (max) Length (avg)  Height (avg)
 Main: 12.0" / 305 mm 570.00 ft / 173.74 m 9.00 ft / 2.74 m
 Ends: Unarmoured
 Upper: 9.00" / 229 mm 570.00 ft / 173.74 m 8.00 ft / 2.44 m
   Main Belt covers 108 % of normal length

   - Torpedo Bulkhead - Additional damage containing bulkheads:
  2.00" / 51 mm 570.00 ft / 173.74 m 31.00 ft / 9.45 m
 Beam between torpedo bulkheads 86.00 ft / 26.21 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: 5.00" / 127 mm 4.00" / 102 mm  5.00" / 127 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 9.00" / 229 mm

Machinery:
 Oil fired boilers, steam turbines, 
 Geared drive, 4 shafts, 160,033 shp / 119,385 Kw = 30.00 kts
 Range 7,500nm at 16.00 kts
 Bunker at max displacement = 5,680 tons

Complement:
 1,568 - 2,039

Cost:
 £4.688 million / $18.752 million

Distribution of weights at normal displacement:
 Armament: 2,794 tons, 6.1 %
    - Guns: 2,794 tons, 6.1 %
 Armour: 14,133 tons, 30.8 %
    - Belts: 4,307 tons, 9.4 %
    - Torpedo bulkhead: 1,308 tons, 2.8 %
    - Armament: 4,380 tons, 9.5 %
    - Armour Deck: 3,557 tons, 7.7 %
    - Conning Towers: 580 tons, 1.3 %
 Machinery: 5,511 tons, 12.0 %
 Hull, fittings & equipment: 18,021 tons, 39.2 %
 Fuel, ammunition & stores: 5,481 tons, 11.9 %
 Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
 Survivability (Non-critical penetrating hits needed to sink ship):
   74,422 lbs / 33,757 Kg = 44.1 x 15.0 " / 381 mm shells or 11.0 torpedoes
 Stability (Unstable if below 1.00): 1.14
 Metacentric height 7.2 ft / 2.2 m
 Roll period: 16.9 seconds
 Steadiness - As gun platform (Average = 50 %): 62 %
   - Recoil effect (Restricted arc if above 1.00): 0.84
 Seaboat quality  (Average = 1.00): 1.25

Hull form characteristics:
 Hull has low quarterdeck ,
   a ram bow and a cruiser stern
 Block coefficient (normal/deep): 0.590 / 0.596
 Length to Beam Ratio: 7.54 : 1
 'Natural speed' for length: 28.53 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: -2.00 ft / -0.61 m
 Freeboard (% = length of deck as a percentage of waterline length):
    Fore end,  Aft end
    - Forecastle: 25.00 %,  31.00 ft / 9.45 m,  29.00 ft / 8.84 m
    - Forward deck: 30.00 %,  29.00 ft / 8.84 m,  28.00 ft / 8.53 m
    - Aft deck: 14.00 %,  28.00 ft / 8.53 m,  28.00 ft / 8.53 m
    - Quarter deck: 31.00 %,  20.00 ft / 6.10 m,  20.00 ft / 6.10 m
    - Average freeboard:  26.12 ft / 7.96 m
 Ship tends to be wet forward

Ship space, strength and comments:
 Space - Hull below water (magazines/engines, low = better): 88.0 %
  - Above water (accommodation/working, high = better): 219.3 %
 Waterplane Area: 63,699 Square feet or 5,918 Square metres
 Displacement factor (Displacement / loading): 117 %
 Structure weight / hull surface area: 212 lbs/sq ft or 1,036 Kg/sq metre
 Hull strength (Relative):
  - Cross-sectional: 0.97
  - Longitudinal: 1.37
  - Overall: 1.00
 Adequate machinery, storage, compartmentation space
 Excellent accommodation and workspace room
 Good seaboat, rides out heavy weather easily