Something I've been playing around w/ in my head

[Sachmle]

AC1914v2, Naciones Unidas Armoured Cruiser laid down 1914 (Engine 1912)

Displacement:
   19,500 t light; 20,350 t standard; 21,765 t normal; 22,897 t full load

Dimensions: Length overall / water x beam x draught
   557.00 ft / 557.00 ft x 92.91 ft x 28.75 ft (normal load)
   169.77 m / 169.77 m x 28.32 m  x 8.76 m

Armament:
      8 - 11.00" / 279 mm guns (4x2 guns), 666.00lbs / 302.09kg shells, 1914 Model
     Breech loading guns in turrets (on barbettes)
     on centreline ends, evenly spread, 2 raised mounts - superfiring
      10 - 6.00" / 152 mm guns in single mounts, 100.00lbs / 45.36kg shells, 1905 Model
     Breech loading guns in casemate mounts
     on side, all forward
      8 - 4.00" / 102 mm guns in single mounts, 30.00lbs / 13.61kg shells, 1906 Model
     Quick firing guns in deck mounts with hoists
     on side, all amidships
   Weight of broadside 6,568 lbs / 2,979 kg
   Shells per gun, main battery: 110
   4 - 18.0" / 457.2 mm submerged torpedo tubes

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   10.0" / 254 mm   362.00 ft / 110.34 m   16.00 ft / 4.88 m
   Ends:   5.00" / 127 mm   195.00 ft / 59.44 m   16.00 ft / 4.88 m
   Upper:   5.00" / 127 mm   362.00 ft / 110.34 m   8.00 ft / 2.44 m
     Main Belt covers 100 % of normal length

   - Torpedo Bulkhead:
      1.50" / 38 mm   362.00 ft / 110.34 m   40.00 ft / 12.19 m

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   12.0" / 305 mm   8.00" / 203 mm      10.0" / 254 mm
   2nd:   5.00" / 127 mm   2.00" / 51 mm      1.00" / 25 mm
   3rd:   1.00" / 25 mm   1.00" / 25 mm      1.00" / 25 mm

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

Machinery:
   Oil fired boilers, steam turbines,
   Electric motors, 4 shafts, 65,312 shp / 48,723 Kw = 26.00 kts
   Range 7,500nm at 12.00 kts
   Bunker at max displacement = 2,547 tons

Complement:
   895 - 1,164

Cost:
   £2.223 million / $8.891 million

Distribution of weights at normal displacement:
   Armament: 833 tons, 3.8 %
   Armour: 7,961 tons, 36.6 %
      - Belts: 3,748 tons, 17.2 %
      - Torpedo bulkhead: 804 tons, 3.7 %
      - Armament: 1,918 tons, 8.8 %
      - Armour Deck: 1,290 tons, 5.9 %
      - Conning Tower: 202 tons, 0.9 %
   Machinery: 2,604 tons, 12.0 %
   Hull, fittings & equipment: 7,802 tons, 35.8 %
   Fuel, ammunition & stores: 2,265 tons, 10.4 %
   Miscellaneous weights: 300 tons, 1.4 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     30,348 lbs / 13,766 Kg = 45.6 x 11.0 " / 279 mm shells or 5.5 torpedoes
   Stability (Unstable if below 1.00): 1.10
   Metacentric height 5.3 ft / 1.6 m
   Roll period: 16.9 seconds
   Steadiness   - As gun platform (Average = 50 %): 59 %
         - Recoil effect (Restricted arc if above 1.00): 0.39
   Seaboat quality  (Average = 1.00): 1.15

Hull form characteristics:
   Hull has raised forecastle, rise forward of midbreak
   Block coefficient: 0.512
   Length to Beam Ratio: 6.00 : 1
   'Natural speed' for length: 23.60 kts
   Power going to wave formation at top speed: 55 %
   Trim (Max stability = 0, Max steadiness = 100): 51
   Bow angle (Positive = bow angles forward): 0.00 degrees
   Stern overhang: 0.00 ft / 0.00 m
   Freeboard (% = measuring location as a percentage of overall length):
      - Stem:      30.00 ft / 9.14 m
      - Forecastle (20 %):   28.00 ft / 8.53 m (26.00 ft / 7.92 m aft of break)
      - Mid (50 %):      24.00 ft / 7.32 m (16.00 ft / 4.88 m aft of break)
      - Quarterdeck (15 %):   16.00 ft / 4.88 m
      - Stern:      16.00 ft / 4.88 m
      - Average freeboard:   21.26 ft / 6.48 m

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 91.6 %
      - Above water (accommodation/working, high = better): 149.5 %
   Waterplane Area: 34,861 Square feet or 3,239 Square metres
   Displacement factor (Displacement / loading): 108 %
   Structure weight / hull surface area: 156 lbs/sq ft or 760 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.93
      - Longitudinal: 1.83
      - Overall: 1.00
   Hull space for machinery, storage, compartmentation is adequate
   Room for accommodation and workspaces is excellent

[Jefgte]

That is difficult to have a correct BC with 26kts in 169m.

A good ship


Jef  ;)

[The Rock Doctor]

Looks okay.  At that point, you're not far off from the next engine tech, so it might be useful to consider a variant with 1916 engine year.

[Sachmle]

Good point. Will have to see what happens. Right now this is just another in the long line of ideas for the next capital ships. I'm tossing around 6 diff versions of Trituradora, this, and the other BB posted in the other thread. My head hurts.... :-\

[The Rock Doctor]

It's to be expected.  I usually go through ten or twenty variants of a major ship type before I settled on a final design.  Sometimes I end up using a spreadsheet to compare them all (and so I can keep straight which is which).

[Sachmle]

So here's the 1916 version.

AC1916v1, Naciones Unidas Armoured Cruiser laid down 1916

Displacement:
   25,000 t light; 26,021 t standard; 28,254 t normal; 30,040 t full load

Dimensions: Length overall / water x beam x draught
   672.00 ft / 672.00 ft x 96.00 ft x 30.00 ft (normal load)
   204.83 m / 204.83 m x 29.26 m  x 9.14 m

Armament:
      9 - 11.00" / 279 mm guns (3x3 guns), 666.00lbs / 302.09kg shells, 1916 Model
     Breech loading guns in turrets (on barbettes)
     on centreline ends, majority aft, 1 raised mount aft - superfiring
      10 - 6.00" / 152 mm guns in single mounts, 100.00lbs / 45.36kg shells, 1916 Model
     Breech loading guns in casemate mounts
     on side, all forward
      8 - 4.00" / 102 mm guns in single mounts, 30.00lbs / 13.61kg shells, 1916 Model
     Quick firing guns in deck mounts with hoists
     on side, all amidships
   Weight of broadside 7,234 lbs / 3,281 kg
   Shells per gun, main battery: 110
   4 - 18.0" / 457.2 mm submerged torpedo tubes

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   11.0" / 279 mm   437.00 ft / 133.20 m   16.00 ft / 4.88 m
   Ends:   5.00" / 127 mm   235.00 ft / 71.63 m   12.00 ft / 3.66 m
   Upper:   6.00" / 152 mm   437.00 ft / 133.20 m   8.00 ft / 2.44 m
     Main Belt covers 100 % of normal length

   - Torpedo Bulkhead:
      1.75" / 44 mm   437.00 ft / 133.20 m   44.00 ft / 13.41 m

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   12.0" / 305 mm   8.00" / 203 mm      10.0" / 254 mm
   2nd:   6.00" / 152 mm   2.00" / 51 mm      1.00" / 25 mm
   3rd:   2.00" / 51 mm   1.00" / 25 mm      1.00" / 25 mm

   - Armour deck: 2.50" / 64 mm, Conning tower: 12.00" / 305 mm

Machinery:
   Oil fired boilers, steam turbines,
   Electric motors, 4 shafts, 108,141 shp / 80,673 Kw = 29.00 kts
   Range 10,000nm at 13.00 kts
   Bunker at max displacement = 4,019 tons

Complement:
   1,089 - 1,416

Cost:
   £3.614 million / $14.454 million

Distribution of weights at normal displacement:
   Armament: 916 tons, 3.2 %
   Armour: 9,967 tons, 35.3 %
      - Belts: 4,737 tons, 16.8 %
      - Torpedo bulkhead: 1,245 tons, 4.4 %
      - Armament: 1,738 tons, 6.2 %
      - Armour Deck: 2,008 tons, 7.1 %
      - Conning Tower: 240 tons, 0.8 %
   Machinery: 4,029 tons, 14.3 %
   Hull, fittings & equipment: 9,788 tons, 34.6 %
   Fuel, ammunition & stores: 3,254 tons, 11.5 %
   Miscellaneous weights: 300 tons, 1.1 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     37,598 lbs / 17,054 Kg = 56.5 x 11.0 " / 279 mm shells or 6.4 torpedoes
   Stability (Unstable if below 1.00): 1.11
   Metacentric height 5.7 ft / 1.7 m
   Roll period: 16.9 seconds
   Steadiness   - As gun platform (Average = 50 %): 70 %
         - Recoil effect (Restricted arc if above 1.00): 0.36
   Seaboat quality  (Average = 1.00): 1.13

Hull form characteristics:
   Hull has raised forecastle, rise forward of midbreak
   Block coefficient: 0.511
   Length to Beam Ratio: 7.00 : 1
   'Natural speed' for length: 25.92 kts
   Power going to wave formation at top speed: 54 %
   Trim (Max stability = 0, Max steadiness = 100): 62
   Bow angle (Positive = bow angles forward): 0.00 degrees
   Stern overhang: 0.00 ft / 0.00 m
   Freeboard (% = measuring location as a percentage of overall length):
      - Stem:      30.00 ft / 9.14 m
      - Forecastle (20 %):   28.00 ft / 8.53 m (26.00 ft / 7.92 m aft of break)
      - Mid (50 %):      24.00 ft / 7.32 m (16.00 ft / 4.88 m aft of break)
      - Quarterdeck (15 %):   16.00 ft / 4.88 m
      - Stern:      16.00 ft / 4.88 m
      - Average freeboard:   21.26 ft / 6.48 m

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 93.7 %
      - Above water (accommodation/working, high = better): 153.0 %
   Waterplane Area: 43,416 Square feet or 4,033 Square metres
   Displacement factor (Displacement / loading): 110 %
   Structure weight / hull surface area: 157 lbs/sq ft or 769 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.96
      - Longitudinal: 1.38
      - 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

[Borys]

Frankly, I don't see much improvement of the 1916 version over the previous one. I don't think the 3 knots merit 5,500 more tonnes of steel.
Borys

[Sachmle]

Well the main and upper belts and the casemates are thicker by 1" each, the deck armor is .5" thicker, the TDS is .25" thicker and goes from the kiel to the weather deck, there is 1 more MB rifle and they are in triples instead of twins for one less turret. She also has more stability and steadiness for a loss of 0.01 seakeeping.  :P