Mini Battleship

[ledeper]

Mini bb Coastal/Colonoial type , B.C Coastal/Colonoial type Battleship laid down 1914

Displacement:
   16.486 t light; 17.396 t standard; 18.226 t normal; 18.889 t full load

Dimensions: Length overall / water x beam x draught
   528,80 ft / 524,93 ft x 78,74 ft x 22,97 ft (normal load)
   161,18 m / 160,00 m x 24,00 m  x 7,00 m

Armament:
      4 - 15,00" / 381 mm guns (2x2 guns), 1.687,50lbs / 765,44kg shells, 1914 Model
     Breech loading guns in turrets (on barbettes)
     on centreline, all forward, 1 raised mount - superfiring
      8 - 6,00" / 152 mm guns in single mounts, 108,00lbs / 48,99kg shells, 1914 Model
     Breech loading guns in deck mounts with hoists
     on side, all amidships
      10 - 4,00" / 102 mm guns in single mounts, 32,00lbs / 14,51kg shells, 1914 Model
     Quick firing guns in deck mounts
     on side, evenly spread
      10 - 1,57" / 40,0 mm guns in single mounts, 1,95lbs / 0,89kg shells, 1914 Model
     Quick firing guns in deck mounts
     on side, evenly spread
   Weight of broadside 7.954 lbs / 3.608 kg
   Shells per gun, main battery: 120

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   14,0" / 356 mm   341,21 ft / 104,00 m   10,65 ft / 3,25 m
   Ends:   Unarmoured
   Upper:   7,00" / 178 mm   341,21 ft / 104,00 m   8,00 ft / 2,44 m
     Main Belt covers 100 % of normal length

   - Torpedo Bulkhead:
      0,50" / 13 mm   341,21 ft / 104,00 m   20,59 ft / 6,28 m

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   14,0" / 356 mm   6,00" / 152 mm      12,0" / 305 mm
   2nd:   0,50" / 13 mm         -               -
   3rd:   0,50" / 13 mm         -               -
   4th:   0,50" / 13 mm         -               -

   - Armour deck: 5,00" / 127 mm, Conning tower: 14,00" / 356 mm

Machinery:
   Oil fired boilers, steam turbines,
   Electric motors, 2 shafts, 22.665 shp / 16.908 Kw = 20,00 kts
   Range 5.000nm at 12,00 kts
   Bunker at max displacement = 1.493 tons

Complement:
   783 - 1.019

Cost:
   £1,953 million / $7,811 million

Distribution of weights at normal displacement:
   Armament: 994 tons, 5,5 %
   Armour: 7.555 tons, 41,5 %
      - Belts: 3.053 tons, 16,8 %
      - Torpedo bulkhead: 130 tons, 0,7 %
      - Armament: 1.175 tons, 6,4 %
      - Armour Deck: 2.988 tons, 16,4 %
      - Conning Tower: 209 tons, 1,1 %
   Machinery: 873 tons, 4,8 %
   Hull, fittings & equipment: 6.713 tons, 36,8 %
   Fuel, ammunition & stores: 1.740 tons, 9,5 %
   Miscellaneous weights: 350 tons, 1,9 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     28.643 lbs / 12.992 Kg = 17,0 x 15,0 " / 381 mm shells or 4,8 torpedoes
   Stability (Unstable if below 1.00): 1,07
   Metacentric height 4,0 ft / 1,2 m
   Roll period: 16,5 seconds
   Steadiness   - As gun platform (Average = 50 %): 74 %
         - Recoil effect (Restricted arc if above 1.00): 0,78
   Seaboat quality  (Average = 1.00): 1,48

Hull form characteristics:
   Hull has a flush deck
   Block coefficient: 0,672
   Length to Beam Ratio: 6,67 : 1
   'Natural speed' for length: 22,91 kts
   Power going to wave formation at top speed: 44 %
   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 (% = measuring location as a percentage of overall length):
      - Stem:      21,92 ft / 6,68 m
      - Forecastle (20 %):   16,04 ft / 4,89 m
      - Mid (50 %):      16,04 ft / 4,89 m
      - Quarterdeck (15 %):   16,04 ft / 4,89 m
      - Stern:      16,04 ft / 4,89 m
      - Average freeboard:   16,51 ft / 5,03 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 80,1 %
      - Above water (accommodation/working, high = better): 126,1 %
   Waterplane Area: 32.305 Square feet or 3.001 Square metres
   Displacement factor (Displacement / loading): 104 %
   Structure weight / hull surface area: 154 lbs/sq ft or 750 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0,96
      - Longitudinal: 1,51
      - Overall: 1,00
   Hull space for machinery, storage, compartmentation is excellent
   Room for accommodation and workspaces is excellent
   Ship has slow, easy roll, a good, steady gun platform
   Good seaboat, rides out heavy weather easily

[Borys]

Ahoj!
Interesting.
I would not build it for myself.
But for either the Baltic, or Indian waters, why not?
Possible to decrease draught further?
Maybe bring up stability (survivability) a little?
Borys

[Korpen]

Mini bb Coastal/Colonoial type , B.C Coastal/Colonoial type Battleship laid down 1914

Displacement:
   16.486 t light; 17.396 t standard; 18.226 t normal; 18.889 t full load

My first reaction: Over-armoured and under-gunned.
While her armour is excellent (and the deck is excessive IMO) with just four main guns she will have trouble in a long range fight. I think four guns would have been alright for a ship half her size, but considering her size she would need more guns (or much smaller size).

- Torpedo Bulkhead:
      0,50" / 13 mm   341,21 ft / 104,00 m   20,59 ft / 6,28

On a detail: Her torpedo bulkhead is pretty useless, at only 13mm it will fail to all underwater explosion, and therefore only resulting in cramping the ship without adding any real protection. 

[Ithekro]

I wouldn't call four 15" guns under-gunned on a roughly 18,250 ton battleship  A lot of natons had a hard time gettting eight 12" guns on a platform that small.  Since it has decent secondary and teriatry batteries for its size in addition to the main guns, that is a lot of firepower for a "coastal battleship"  While all the currect Rohirrm battleships have more broadside weight than this ship (even the Theodens beat this by almost 1,000 pounds), the Rohirrim ships are Ocean going battleships...tend to be slower, and have more heavy guns for their size than most ships normally would.  By the Aldor class, the Rohirrim ships more than double the broadside weight of his ship, but they also nearly double the size of the ship as well. (30,500 ton battlships)

If you still consider in undergunned, add more secondaries of one type and drop the second type, replacing them with more of the lighter quick fires.  A good secondary broadside is six to seven guns on a side to handle torpedo boats and cruisers and even be able to do damage to a capital ship.  A larger battleship might have as many as ten seconday guns on a broadside by this point in time.

[P3D]

If you don't want to fight battleships, 15" guns are overkill. If you want to fight battleships, 4 guns are not enough. Any adversary would have to send the same ships against her even if armed with 12" guns (2 destroyer flotillas of similar displacement, knowing BC's almost complete lack of screening ships).
Armor is excessive, while underwater defense is useless. Considering mines and torpedoes as the main littoral threat, not the best idea.

The ship is economizing only on main armament and speed. It would have to face torpedo equipped light cruisers and destroyers.

BTW, has the Baltic Confederation start a program to build ships that are useful outside fleet action? Like destroyers, cruisers and such? ;)

I'd just relegate ships from the main battleline to India, and build new full-sized battlehips, after I'd have enough smaller combatants. Right now there's no naval powers that could not disrupt the trade of the Baltic Confederation with more than minimal effort.