DKB BC

[Sachmle]

This design, barring input from others, will be laid down 1/19 as the first new DKB SK since the Moltke's in 1911.

SK H, Brandenburger Schlachtkreuzer laid down 1919 (Engine 1916)

Displacement:
   32,750 t light; 34,104 t standard; 36,905 t normal; 39,146 t full load

Dimensions: Length overall / water x beam x draught
   721.77 ft / 715.22 ft x 110.07 ft x 28.97 ft (normal load)
   220.00 m / 218.00 m x 33.55 m  x 8.83 m

Armament:
      8 - 13.78" / 350 mm guns (4x2 guns), 1,322.77lbs / 600.00kg shells, 1915 Model
     Breech loading guns in turrets (on barbettes)
     on centreline, evenly spread, 1 raised mount
     Aft Main mounts separated by engine room
      14 - 5.91" / 150 mm guns in single mounts, 99.21lbs / 45.00kg shells, 1918 Model
     Breech loading guns in casemate mounts
     on side, evenly spread
     14 guns in hull casemates - Limited use in heavy seas
      4 - 3.46" / 88.0 mm guns in single mounts, 22.05lbs / 10.00kg shells, 1919 Model
     Anti-aircraft guns in deck mounts
     on side, all amidships, all raised mounts - superfiring
      4 - 1.46" / 37.0 mm guns in single mounts, 1.55lbs / 0.70kg shells, 1919 Model
     Anti-aircraft guns in deck mounts
     on centreline ends, evenly spread, all raised mounts - superfiring
      4 - 0.30" / 7.7 mm guns in single mounts, 0.01lbs / 0.01kg shells, 1919 Model
     Machine guns in deck mounts
     on side ends, evenly spread, all raised mounts - superfiring
   Weight of broadside 12,066 lbs / 5,473 kg
   Shells per gun, main battery: 90
   6 - 19.7" / 500 mm submerged torpedo tubes

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   11.8" / 300 mm   465.06 ft / 141.75 m   16.40 ft / 5.00 m
   Ends:   2.95" / 75 mm   250.16 ft / 76.25 m   16.40 ft / 5.00 m
   Upper:   3.94" / 100 mm   465.06 ft / 141.75 m   16.40 ft / 5.00 m
     Main Belt covers 100 % of normal length

   - Torpedo Bulkhead:
      1.38" / 35 mm   465.06 ft / 141.75 m   37.17 ft / 11.33 m

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   11.8" / 300 mm   7.87" / 200 mm      11.8" / 300 mm
   2nd:   3.94" / 100 mm   1.97" / 50 mm      2.95" / 75 mm
   3rd:   1.97" / 50 mm         -               -
   4th:   0.98" / 25 mm         -               -

   - Armour deck: 2.95" / 75 mm, Conning tower: 11.81" / 300 mm

Machinery:
   Oil fired boilers, steam turbines,
   Electric motors, 4 shafts, 118,000 shp / 88,028 Kw = 28.32 kts
   Range 12,500nm at 12.00 kts
   Bunker at max displacement = 5,041 tons

Complement:
   1,330 - 1,730

Cost:
   £6.592 million / $26.368 million

Distribution of weights at normal displacement:
   Armament: 1,500 tons, 4.1 %
   Armour: 12,652 tons, 34.3 %
      - Belts: 5,685 tons, 15.4 %
      - Torpedo bulkhead: 881 tons, 2.4 %
      - Armament: 2,756 tons, 7.5 %
      - Armour Deck: 3,048 tons, 8.3 %
      - Conning Tower: 282 tons, 0.8 %
   Machinery: 4,396 tons, 11.9 %
   Hull, fittings & equipment: 13,641 tons, 37.0 %
   Fuel, ammunition & stores: 4,155 tons, 11.3 %
   Miscellaneous weights: 561 tons, 1.5 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     53,326 lbs / 24,188 Kg = 40.8 x 13.8 " / 350 mm shells or 8.4 torpedoes
   Stability (Unstable if below 1.00): 1.13
   Metacentric height 7.2 ft / 2.2 m
   Roll period: 17.2 seconds
   Steadiness   - As gun platform (Average = 50 %): 70 %
         - Recoil effect (Restricted arc if above 1.00): 0.41
   Seaboat quality  (Average = 1.00): 1.13

Hull form characteristics:
   Hull has rise forward of midbreak
   Block coefficient: 0.566
   Length to Beam Ratio: 6.50 : 1
   'Natural speed' for length: 26.74 kts
   Power going to wave formation at top speed: 53 %
   Trim (Max stability = 0, Max steadiness = 100): 62
   Bow angle (Positive = bow angles forward): 12.50 degrees
   Stern overhang: -4.10 ft / -1.25 m
   Freeboard (% = measuring location as a percentage of overall length):
      - Stem:      29.53 ft / 9.00 m
      - Forecastle (25 %):   24.61 ft / 7.50 m
      - Mid (74 %):      24.61 ft / 7.50 m (16.40 ft / 5.00 m aft of break)
      - Quarterdeck (15 %):   16.40 ft / 5.00 m
      - Stern:      16.40 ft / 5.00 m
      - Average freeboard:   22.97 ft / 7.00 m

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 89.7 %
      - Above water (accommodation/working, high = better): 184.6 %
   Waterplane Area: 55,792 Square feet or 5,183 Square metres
   Displacement factor (Displacement / loading): 109 %
   Structure weight / hull surface area: 181 lbs/sq ft or 886 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.97
      - Longitudinal: 1.33
      - 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

250t 1912 Entfernungsmesser-und Feuerkontrolle-Direktor
36t 1913 50cm 2t Torpedos. 18 total, 3 per tube
25t 1915 Sehendes Auge
25t 1912 Sternmuschel and 60cm Scheinwerfer
25t 1919 Großer Drahtloser Übermittler
200t Reserve

[mentat]

  - a beautifully balanced BC  :)

- my only minor query - would be looking forward - possibly more value in a slightly thicker main belt 13-14" vs. the value of the end belt?

[Sachmle]

  - a beautifully balanced BC  :)

- my only minor query - would be looking forward - possibly more value in a slightly thicker main belt 13-14" vs. the value of the end belt?

2 reasons:
1) The DKB does not appreciate the value of All-or-Nothing protections scheme yet.
2) Anything less then 75mm is pretty useless even against CL guns.

[maddox]

Those .32 kts over 28, what would those free up if in weight?

[Jefgte]

As usual, well balanced ship  ;)

...1) The DKB does not appreciate the value of All-or-Nothing protections scheme yet...

That's what I think too;
Bow armor is not made to stop heavy shells but for limit the damages & to have smaller holes.

That is usefull to limit the enter of water, pumps job is limited.
Maintain top speed & the place in the Battleline for a long time during action.

Remember Osliabia & Lutzow...

IMO, All or Nothing does'nt mean 340 & 20 but 340 & 100


Jef  ;)

[Sachmle]

Those .32 kts over 28, what would those free up if in weight?

375t

[mentat]

interesting - because that's about enough to raise belt thickness to around 340mm - abreast mags only

[Sachmle]

interesting - because that's about enough to raise belt thickness to around 340mm - abreast mags only

Which would be really cool, if you could do that in Springsharp.

[Guinness]

well, you could, sort of:

Calculate how long just your magazines are by setting speed to 0.
Then you can calculate how heavy your belt is by dividing it by height and thickness to get tons per square meter per cm (or whatever). You could then maybe add to the belt until you make up the difference for the extra area and thickness over the magazines, or if you aren't using end belt, add some to represent that additional thickness.

Make note of all these calculations in your notes.

If it's worth it that is. Adding end belt will likely decrease your stability slightly. Adding some thickness to your main belt shouldn't make much of a difference.

[Kaiser Kirk]

yes, but I'd much rather be allowed to do the same for deck armor, which takes increasing amounts of weight, a substantial amount of which covers the ends.
Any such formulation should be a formal thing IMHO.

[Sachmle]

yes, but I'd much rather be allowed to do the same for deck armor, which takes increasing amounts of weight, a substantial amount of which covers the ends.
Any such formulation should be a formal thing IMHO.

At least SS3b covers the deck armor thing, but not the belt.

[Kaiser Kirk]

It does, and RLBH had a excel sheet that calc'd it in Wesworld. 
For magazines, the upper belt is an easy way to figure weight calcs.
The main belt you have to remember there is a pair of transverse bulkheads included in the weight calc.

Anyhow, what I was trying to get at is if tweaking of armor is sanctioned, it, and the approved techniques, need to be posted in the rules, not squirreled away in a ship design thread , thats all :)

[mentat]

it's pretty easy to set the Belt thickness as an average of what's intended - then add a note e.g.  +10mm Mags - 10mm Machinery - the lengths are pretty equivalent in say a 28 knot BB - but Mags represent more in a slower BB - easy to check proportions vs. a few real life examples - to give rule of thumb

- i can't see any reason to make it more complicated  ;D