SMS Semana Santa II

[Carthaginian]

The CSA is currently debating on the continued existence of the 'three types' of cruisers.
In all likelihood, the 7.5" gun will be suspended for a time- it is too light for killing large cruisers, and too heavy to fit on a small cruiser. The 9.2" gun will be retained and developed to an obscene degree, however. Triples for that one will probably be coming soon.

[The Rock Doctor]

It will be interesting to see what the revamped Triunfante-class class looks like when this particular little European donnybrook runs it's course.

You'll find out when we eventually reach Q1/09.

What will the specifications look like when El Jefe commands his designers to create a 16-gun, 12" battleship design?

Replace the front half of a Triunfante with another back half of Triunfante and you might have it.

I did - briefly - tinker with a 6x3 12" follow-up, but Springstyle went into hysterical laughter at the thought.

[swamphen]

El Presidente: "We're going to need a bigger boat..."

[Carthaginian]

I did - briefly - tinker with a 6x3 12" follow-up, but Springstyle went into hysterical laughter at the thought.

Well, that's the nice thing about SpringSharp... it's easier to medicate into a stupor. ;)

[Borys]

Ahoj!
The SMS Siligia will be built with 12/40 guns firing 850 lbs APC shells.
However, an upgunning of the ship, and use of heavier shells is expected.
Thus the barbettes and magazines are designed with planned 1000 lbs shells in mind.
Also, the expected shell and charge sizes are already accommodated by the hoist arrangements.

Borys

[Borys]

Finalestest Final Version

NOTE:
Problems in obtaining manufacturing license for the 10,8" guns and lack of domestic capacity to manufacture 12" or 13,5" guns (the ersatz Tegetthoff ships are sucking up all available steel) lead to last minute deign changes.
So, actually, 90 shells of 850 lbs (APC) will be carried. Also, the gun will be an older 12"/L40 model. Due to difference in weights this drives up hull strenght to 1,04. This will be compensated by additional balast.


SMS Siligia, Habsburgs Schlachtschiff laid down 1909

Displacement:
   27 822 t light; 29 276 t standard; 31 223 t normal; 32 781 t full load

Dimensions: Length overall / water x beam x draught
   670,44 ft / 670,00 ft x 95,00 ft x 29,50 ft (normal load)
   204,35 m / 204,22 m x 28,96 m  x 8,99 m

Armament:
      10 - 12,00" / 305 mm guns (5x2 guns), 1 000,00lbs / 453,59kg shells, 1909 Model
     Breech loading guns in turrets (on barbettes)
     on centreline ends, majority aft, 2 raised mounts - superfiring
      4 - 12,00" / 305 mm guns (2x2 guns), 1 000,00lbs / 453,59kg shells, 1909 Model
     Breech loading guns in turrets (on barbettes)
     on side, all amidships
      18 - 6,00" / 152 mm guns in single mounts, 100,00lbs / 45,36kg shells, 1909 Model
     Breech loading guns in casemate mounts
     on side, evenly spread
     18 guns in hull casemates - Limited use in heavy seas
      8 - 3,00" / 76,2 mm guns in single mounts, 13,50lbs / 6,12kg shells, 1909 Model
     Quick firing guns in deck mounts
     on side, evenly spread, all raised mounts
   Weight of broadside 15 908 lbs / 7 216 kg
   Shells per gun, main battery: 90
   4 - 20,0" / 508 mm submerged torpedo tubes



Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   12,0" / 305 mm   450,00 ft / 137,16 m   17,00 ft / 5,18 m
   Ends:   4,00" / 102 mm   220,00 ft / 67,06 m   12,00 ft / 3,66 m
   Upper:   8,00" / 203 mm   450,00 ft / 137,16 m   8,00 ft / 2,44 m
     Main Belt covers 103% of normal length

   - Torpedo Bulkhead:
      1,50" / 38 mm   450,00 ft / 137,16 m   45,00 ft / 13,72 m

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   12,0" / 305 mm   7,00" / 178 mm      11,0" / 279 mm
   2nd:   12,0" / 305 mm   7,00" / 178 mm      11,0" / 279 mm
   3rd:   4,00" / 102 mm   1,00" / 25 mm      1,00" / 25 mm

   - Armour deck: 2,00" / 51 mm, Conning tower: 12,00" / 305 mm

Machinery:
   Coal fired boilers, steam turbines,
   Direct drive, 4 shafts, 48 127 shp / 35 903 Kw = 23,00 kts
   Range 5 000nm at 12,00 kts
   Bunker at max displacement = 3 506 tons (100% coal)

Complement:
   1 173 - 1 526

Cost:
   £2,796 million / $11,185 million

Distribution of weights at normal displacement:
   Armament: 1 769 tons, 5,7%
   Armour: 11 791 tons, 37,8%
      - Belts: 5 571 tons, 17,8%
      - Torpedo bulkhead: 1 124 tons, 3,6%
      - Armament: 3 146 tons, 10,1%
      - Armour Deck: 1 694 tons, 5,4%
      - Conning Tower: 256 tons, 0,8%
   Machinery: 2 406 tons, 7,7%
   Hull, fittings & equipment: 11 456 tons, 36,7%
   Fuel, ammunition & stores: 3 401 tons, 10,9%
   Miscellaneous weights: 400 tons, 1,3%

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     38 973 lbs / 17 678 Kg = 45,1 x 12,0 " / 305 mm shells or 6,6 torpedoes
   Stability (Unstable if below 1.00): 1,11
   Metacentric height 5,7 ft / 1,7 m
   Roll period: 16,8 seconds
   Steadiness   - As gun platform (Average = 50 %): 60 %
         - Recoil effect (Restricted arc if above 1.00): 0,60
   Seaboat quality  (Average = 1.00): 1,22

Hull form characteristics:
   Hull has a flush deck
   Block coefficient: 0,582
   Length to Beam Ratio: 7,05 : 1
   'Natural speed' for length: 25,88 kts
   Power going to wave formation at top speed: 43 %
   Trim (Max stability = 0, Max steadiness = 100): 49
   Bow angle (Positive = bow angles forward): 1,00 degrees
   Stern overhang: 0,00 ft / 0,00 m
   Freeboard (% = measuring location as a percentage of overall length):
      - Stem:      25,00 ft / 7,62 m
      - Forecastle (25%):   17,00 ft / 5,18 m
      - Mid (50%):      16,50 ft / 5,03 m
      - Quarterdeck (15%):   16,50 ft / 5,03 m
      - Stern:      16,50 ft / 5,03 m
      - Average freeboard:   17,49 ft / 5,33 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 90,3%
      - Above water (accommodation/working, high = better): 123,4%
   Waterplane Area: 45 775 Square feet or 4 253 Square metres
   Displacement factor (Displacement / loading): 100%
   Structure weight / hull surface area: 183 lbs/sq ft or 896 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0,98
      - Longitudinal: 1,16
      - Overall: 1,00
   Hull space for machinery, storage, compartmentation is adequate
   Room for accommodation and workspaces is excellent
   Good seaboat, rides out heavy weather easily

[P3D]

Problems in obtaining manufacturing license for the 10,8" guns and lack of domestic capacity to manufacture 12" or 13,5" guns (the ersatz Tegetthoff ships are sucking up all available steel) lead to last minute deign changes.
So, actually, 90 shells of 850 lbs (APC) will be carried. Also, the gun will be an older 12"/L40 model. Due to difference in weights this drives up hull strenght to 1,04. This will be compensated by additional balast.

That makes sure that the ship would become an obsolescent second-rate dreadnought even before laying down. Why not just design a 12"/50 gun, or buy designs from, an ally - say, the DKB?
You should write an article about some firms lobbying/bribing naval officers to build this contraption...

[Walter]

Why not just design a 12"/50 gun, or buy designs from, an ally - say, the DKB?

That might have something to do with the fact that the tech level required for a 12"/50 cal gun was orignally 1910 cutting edge (which was later changed to 1907).

[P3D]

Yes, but the 12"/45 should be available at every street corner arms dealer (according to rumors, M'sieur Kranitz might be able to provide), while the 12"/40 was relegated to secondary roles like coastal defence in some navies.

[Borys]

Ahoj!
Exactly. I'd have liked a 12"/50, but none is available. It is either develop a 12"/45, or use the true and trusted 12"/40.
Is there such a gap between the two?
But if you think there is an issue, and the 12"/45 is so much better, I can develop it. And I can even use the OTL Skoda gun here.
So the commentary is now moot - the SMS Siligia will have 12"/45 guns firing 1000 lbs APC shells.
Borys

[P3D]

The penetration performance difference is something like 10%.