Rohan Battleship design 1914-1915

[Ithekro]

This is an inbetween design.  The new 15.5" cannons will not be ready for the 1915 designs, so they will wait until the 1917 design.  However the Mark still wants to lay down two battleships before 1917.  Therefore the Mark has decided to invest in two large battleships designed as flagships from the start.  They also have longer range than previous battleships of the Mark.  Armed with the newest 14" guns in five turrets (2 twins and 3 triples), it will have the largest broadside in the fleet until the 15.5" guns are ready.  Both will be purchased in late 1914, though only one can be laid down due to a limited number of docks.  The second will be laid down as soon as a dock is cleared or enlarged to allow it to be laid down.

Eorl
Peregrin

Rohan Battleship laid down 1914 (Engine 1912)

Displacement:
   34,627 t light; 36,501 t standard; 38,500 t normal; 39,945 t full load

Dimensions: Length overall / water x beam x draught
   690.00 ft / 685.00 ft x 108.00 ft x 27.00 ft (normal load)
   210.31 m / 208.79 m x 32.92 m  x 8.23 m

Armament:
      13 - 14.00" / 356 mm guns (5 mounts), 1,372.00lbs / 622.33kg shells, 1914 Model
     Breech loading guns in turrets (on barbettes)
     on centreline ends, majority forward, 2 raised mounts - superfiring
      16 - 6.00" / 152 mm guns in single mounts, 108.00lbs / 48.99kg shells, 1914 Model
     Quick firing guns in casemate mounts
     on side, evenly spread, 4 raised mounts
      8 - 1.50" / 38.1 mm guns in single mounts, 1.69lbs / 0.77kg shells, 1914 Model
     Quick firing guns in deck mounts
     on side, evenly spread, all raised mounts
      8 - 0.75" / 19.1 mm guns in single mounts, 0.21lbs / 0.10kg shells, 1914 Model
     Machine guns in deck mounts
     on side, evenly spread
   Weight of broadside 19,579 lbs / 8,881 kg
   Shells per gun, main battery: 100

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   13.0" / 330 mm   390.00 ft / 118.87 m   11.00 ft / 3.35 m
   Ends:   5.00" / 127 mm   295.00 ft / 89.92 m   11.00 ft / 3.35 m
   Upper:   7.00" / 178 mm   390.00 ft / 118.87 m   11.00 ft / 3.35 m
     Main Belt covers 88 % of normal length

   - Torpedo Bulkhead:
      1.50" / 38 mm   390.00 ft / 118.87 m   27.00 ft / 8.23 m

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   14.0" / 356 mm   10.0" / 254 mm      14.0" / 356 mm
   2nd:   7.00" / 178 mm         -               -

   - Armour deck: 3.00" / 76 mm, Conning tower: 13.00" / 330 mm

Machinery:
   Oil fired boilers, steam turbines,
   Direct drive, 4 shafts, 45,000 shp / 33,570 Kw = 21.55 kts
   Range 7,000nm at 12.00 kts (Bunkerage = 3,598 tons)

Complement:
   1,373 - 1,786

Cost:
   £4.479 million / $17.915 million

Distribution of weights at normal displacement:
   Armament: 2,447 tons, 6.4 %
   Armour: 14,127 tons, 36.7 %
      - Belts: 4,497 tons, 11.7 %
      - Torpedo bulkhead: 584 tons, 1.5 %
      - Armament: 5,541 tons, 14.4 %
      - Armour Deck: 3,183 tons, 8.3 %
      - Conning Tower: 321 tons, 0.8 %
   Machinery: 1,794 tons, 4.7 %
   Hull, fittings & equipment: 15,858 tons, 41.2 %
   Fuel, ammunition & stores: 3,873 tons, 10.1 %
   Miscellaneous weights: 400 tons, 1.0 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     50,512 lbs / 22,912 Kg = 36.8 x 14.0 " / 356 mm shells or 7.2 torpedoes
   Stability (Unstable if below 1.00): 1.07
   Metacentric height 6.4 ft / 1.9 m
   Steadiness   - As gun platform (Average = 50 %): 71 %
         - Recoil effect (Restricted arc if above 1.00): 0.79
   Seaboat quality  (Average = 1.00): 1.45

Hull form characteristics:
   Hull has rise forward of midbreak
   Block coefficient: 0.675
   Length to Beam Ratio: 6.34 : 1
   'Natural speed' for length: 26.17 kts
   Power going to wave formation at top speed: 42 %
   Trim (Max stability = 0, Max steadiness = 100): 49
   Bow angle (Positive = bow angles forward): 9.46 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
      - Mid (50 %):      28.00 ft / 8.53 m (20.00 ft / 6.10 m aft of break)
      - Quarterdeck (15 %):   20.00 ft / 6.10 m
      - Stern:      20.00 ft / 6.10 m
      - Average freeboard:   24.16 ft / 7.36 m

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 79.1 %
      - Above water (accommodation/working, high = better): 188.5 %
   Waterplane Area: 57,359 Square feet or 5,329 Square metres
   Displacement factor (Displacement / loading): 102 %
   Structure weight / hull surface area: 207 lbs/sq ft or 1,009 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.97
      - Longitudinal: 1.39
      - 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

[Guinness]

So what's the turret layout? Is it ABC XY with Triples in A and Y positions, with B (or C) and X twins superfiring?

No matter what, this is a pretty neat ship.

[Ithekro]

The present thought is to have is be A (B) C   (X) Y with the twins superfiring at B and X.  Not sure if I want one of the triples pointed astern or not yet, or it I'd rather it be A B (C) with the C as the superfiring twin mount.

I originally was going to go for 5 triple mounts, but it was just too expensive for what I had in mind.

The question will be how this effect the 1917 15.5" design (originally going to be 4 twins or  a huge 4 triples).  How it could become a 4 twins ship, or if there is enough time (I think there is) a twin/triple ships with five turrets...but again...that would be huge and possibly bigger than I want to go (though I can go out to 720 feet still with a Type 3 slip)

[The Rock Doctor]

Nice. 

I think the A-Bs-C layout will be more space-efficient than A-B-Cs, particularly if C is pointing astern.

The freeboard is unusually high for a Rohirrim ship...

[Ithekro]

It seemed like the only way to keep her stable and a good firing platform.  13 guns takes a bit so she won't just sink in combat while also being able to (in theory) get shells on target.

[The Rock Doctor]

Fair enough.  I'm having a similar challenge with the Radiante class.

[Tanthalas]

I have had much the same issue with my 3X3 ship, the problem im dealing with is speed, I want a fast BB, and I will get it eventualy...