Italia Class Battleships, Problematic

[Barcaii]

This has been bugging me for a while now, I just can't get the Italia to work in Springsharp. It is probably not possible as the ship is the oddball but I'm interested to hear if people have any suggestions for how she might work in springsharp.

Here(in addition to wikipedia) is where i got my specs:http://www.cityofart.net/bship/rn_italia.html#specs

And here is what I got in springsharp so far:

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Italia, Enter country Enter ship type laid down 1880
Barbette ship
Central citadel ship
DESIGN FAILURE: Overall load weight too much for hull

Displacement:
13 363 t light; 14 425 t standard; 15 900 t normal; 17 080 t full load

Dimensions: Length overall / water x beam x draught
409,12 ft / 409,12 ft x 73,82 ft x 28,87 ft (normal load)
124,70 m / 124,70 m x 22,50 m  x 8,80 m

Armament:
      4 - 17,01" / 432 mm guns (2x2 guns), 2 000,00lbs / 907,18kg shells, 1880 Model
  Muzzle loading guns in open barbettes
  on side, all amidships, all raised mounts
  Main guns limited to end-on fire
      7 - 5,91" / 150 mm guns in single mounts, 87,53lbs / 39,70kg shells, 1880 Model
  Breech loading guns in casemate mounts
  on side, all forward
  7 guns in hull casemates - Limited use in heavy seas
      4 - 4,69" / 119 mm guns in single mounts, 43,70lbs / 19,82kg shells, 1880 Model
  Breech loading guns in deck mounts
  on side, evenly spread
Weight of broadside 8 788 lbs / 3 986 kg
Shells per gun, main battery: 150
4 - 14,0" / 356 mm submerged torpedo tubes

Armour:
   - Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main:       -       - 18,0" / 457 mm

   - Armour deck: 4,02" / 102 mm, Conning tower: 4,02" / 102 mm

Machinery:
Coal fired boilers, simple reciprocating steam engines,
Direct drive, 2 shafts, 15 632 ihp / 11 661 Kw = 17,80 kts
Range 5 000nm at 10,00 kts
Bunker at max displacement = 2 655 tons (100% coal)

Complement:
707 - 920

Cost:
£1,881 million / $7,523 million

Distribution of weights at normal displacement:
Armament: 1 144 tons, 7,2 %
Armour: 5 081 tons, 32,0 %
   - Belts: 0 tons, 0,0 %
   - Torpedo bulkhead: 0 tons, 0,0 %
   - Armament: 3 326 tons, 20,9 %
   - Armour Deck: 1 700 tons, 10,7 %
   - Conning Tower: 55 tons, 0,3 %
Machinery: 3 230 tons, 20,3 %
Hull, fittings & equipment: 3 908 tons, 24,6 %
Fuel, ammunition & stores: 2 537 tons, 16,0 %
Miscellaneous weights: 0 tons, 0,0 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
  3 925 lbs / 1 780 Kg = 1,9 x 17,0 " / 432 mm shells or 0,9 torpedoes
Stability (Unstable if below 1.00): 0,98
Metacentric height 3,0 ft / 0,9 m
Roll period: 17,8 seconds
Steadiness - As gun platform (Average = 50 %): 100 %
- Recoil effect (Restricted arc if above 1.00): 1,89
Seaboat quality  (Average = 1.00): 2,00

Hull form characteristics:
Hull has a flush deck
Block coefficient: 0,638
Length to Beam Ratio: 5,54 : 1
'Natural speed' for length: 20,23 kts
Power going to wave formation at top speed: 48 %
Trim (Max stability = 0, Max steadiness = 100): 50
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: 25,00 ft / 7,62 m
   - Forecastle (20 %): 25,00 ft / 7,62 m
   - Mid (50 %): 25,00 ft / 7,62 m
   - Quarterdeck (15 %): 25,00 ft / 7,62 m
   - Stern: 25,00 ft / 7,62 m
   - Average freeboard: 25,00 ft / 7,62 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 125,6 %
- Above water (accommodation/working, high = better): 154,2 %
Waterplane Area: 22 887 Square feet or 2 126 Square metres
Displacement factor (Displacement / loading): 77 %
Structure weight / hull surface area: 105 lbs/sq ft or 515 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0,43
- Longitudinal: 1,95
- Overall: 0,50
Caution: Poor stability - excessive risk of capsizing
Hull space for machinery, storage, compartmentation is cramped
Room for accommodation and workspaces is excellent
Ship has slow, easy roll, a good, steady gun platform
Excellent seaboat, comfortable, can fire her guns in the heaviest weather

Capacity to transport an entire 10,000-man infantry division in a Mediterranean crossing.

As you can see, her hull can't stand the weight according to Springsharp. :/ I'm also quite unsure how well the central redoubt(2.4m above the freeboard) is represented by the just the raised barbettes.

Kind Regards,
Barcaii

[Jefgte]

...
- Reduce the qty of shells
150 is too much - 80 or 70 more réalist.

- Not all infos for the Belt...

- Reduce the range to 2000nm. enough for Mare Nostrum

- Reduce freeboard too

...


Jef  ;)

[Barcaii]

It does not have any armoured belt. At least not according to any of the sources I have seen.

I guess I could reduce both the range and freeboard but this was mostly an exercise to try and build a historical ship in SS2. If I change too much it turns into something quite different. Going to download SS3 and see how well it handles the Italia.

[TexanCowboy]

Cut the armour deck to 2''. SS thinks it's covering the whole deck, when in reality it's just covering the cital.

SS3 would work better for this sort of design, SS2 thinks this is a 45 cal gun when it's just a 26 cal gun.

[Barcaii]

Seems like it is very plausible to get this working in SS3. Trying it now, and I'm quite close to finished, might overshoot the composite strength by just a but some minor corrections are no problem. :)

[Carthaginian]

This is one of the reasons that I am for SS3 for this sim- it is especially good at designing early 'raft-body' type ships because it allows you to build a more realistic armored citadel... and this will again become useful when All-or-Nothing armor comes back into play.

The intermediate designs might come up a bit light... but if everyone is able to abuse physics in a consistant manner, then the problem of inconsistancy is no longer a problem.