Ship Design Guideline Test Ships

[Desertfox]

In the interest of simplicity, could we just stick with a flat 1.0 overall hull strength? Maybe give a bonus to those that go the 1.10/1.05/1.00 route? We are already going with SS3 and that's pretty complicated for starters.

[Tanthalas]

In the interest of simplicity, could we just stick with a flat 1.0 overall hull strength? Maybe give a bonus to those that go the 1.10/1.05/1.00 route? We are already going with SS3 and that's pretty complicated for starters.

Seriously... SS3 is not that hard man, and getting to even a 1.20 isnt to bad (although im all infavor of droping it to a 1.10)

[Sachmle]

Using Navypedia, Wikipedia, NavWeaps I get this. Had some extra strength to eat up so I put misc weight on.

Re Umberto, Italian Barbette Ship laid down 1884
Barbette ship

Displacement:
   11,349 t light; 12,006 t standard; 13,673 t normal; 15,006 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (418.64 ft / 407.15 ft) x 76.77 ft x (30.48 / 32.72 ft)
   (127.60 m / 124.10 m) x 23.40 m  x (9.29 / 9.97 m)

Armament:
      4 - 13.50" / 343 mm 30.0 cal guns - 1,322.77lbs / 600.00kg shells, 80 per gun
     Breech loading guns in open barbette mounts, 1880 Model
     2 x Twin mounts on centreline ends, evenly spread
      8 - 5.98" / 152 mm 40.0 cal guns - 99.87lbs / 45.30kg shells, 250 per gun
     Quick firing guns in deck mounts, 1884 Model
     8 x Single mounts on sides, evenly spread
      8 raised mounts
      16 - 2.24" / 57.0 mm 43.0 cal guns - 6.00lbs / 2.72kg shells, 500 per gun
     Quick firing guns in casemate mounts, 1883 Model
     16 x Single mounts on sides, evenly spread
      4 hull mounts in casemates- Limited use in any sea
      4 - 2.24" / 57.0 mm 43.0 cal guns - 6.00lbs / 2.72kg shells, 500 per gun
     Quick firing guns in deck mounts, 1883 Model
     4 x Single mounts on centreline ends, evenly spread
      4 raised mounts
      10 - 1.46" / 37.0 mm 30.0 cal guns - 0.99lbs / 0.45kg shells, 750 per gun
     Quick firing guns in deck mounts, 1884 Model
     10 x Single mounts on sides, evenly spread
      10 raised mounts
      Weight of broadside 6,220 lbs / 2,821 kg
      Main Torpedoes
      15 - 17.7" / 450 mm, 17.06 ft / 5.20 m torpedoes - 0.305 t each, 4.579 t total
   In 5 sets of deck mounted carriage/fixed tubes

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   3.94" / 100 mm   272.31 ft / 83.00 m   10.66 ft / 3.25 m
   Ends:   Unarmoured
   Upper:   3.94" / 100 mm   262.47 ft / 80.00 m   8.20 ft / 2.50 m
     Main Belt covers 103 % of normal length

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:         -            -         14.2" / 360 mm
   2nd:   1.97" / 50 mm         -               -
   3rd:   1.97" / 50 mm         -         3.94" / 100 mm
   4th:   1.97" / 50 mm         -               -
   5th:   0.98" / 25 mm         -               -

   - Protected deck - single deck:
   For and Aft decks: 2.95" / 75 mm
   Forecastle: 2.95" / 75 mm  Quarter deck: 2.95" / 75 mm

Machinery:
   Coal fired boilers, simple reciprocating steam engines,
   Direct drive, 2 shafts, 17,000 ihp / 12,682 Kw = 19.00 kts
   Range 7,180nm at 10.00 kts
   Bunker at max displacement = 3,000 tons (100% coal)

Complement:
   631 - 821

Cost:
   £1.086 million / $4.344 million

Distribution of weights at normal displacement:
   Armament: 613 tons, 4.5 %
      - Guns: 607 tons, 4.4 %
      - Weapons: 6 tons, 0.0 %
   Armour: 2,849 tons, 20.8 %
      - Belts: 886 tons, 6.5 %
      - Armament: 813 tons, 5.9 %
      - Armour Deck: 1,149 tons, 8.4 %
   Machinery: 3,341 tons, 24.4 %
   Hull, fittings & equipment: 4,492 tons, 32.9 %
   Fuel, ammunition & stores: 2,324 tons, 17.0 %
   Miscellaneous weights: 55 tons, 0.4 %
      - Hull below water: 25 tons
      - Hull above water: 25 tons
      - On freeboard deck: 5 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     12,077 lbs / 5,478 Kg = 10.8 x 13.5 " / 343 mm shells or 7.9 torpedoes
   Stability (Unstable if below 1.00): 1.64
   Metacentric height 7.7 ft / 2.3 m
   Roll period: 11.7 seconds
   Steadiness   - As gun platform (Average = 50 %): 70 %
         - Recoil effect (Restricted arc if above 1.00): 0.19
   Seaboat quality  (Average = 1.00): 1.21

Hull form characteristics:
   Hull has a flush deck,
     a ram bow and a cruiser stern
   Block coefficient (normal/deep): 0.502 / 0.514
   Length to Beam Ratio: 5.30 : 1
   'Natural speed' for length: 20.18 kts
   Power going to wave formation at top speed: 48 %
   Trim (Max stability = 0, Max steadiness = 100): 58
   Bow angle (Positive = bow angles forward): -20.00 degrees
   Stern overhang: -8.20 ft / -2.50 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
      - Forecastle:   20.00 %,  10.66 ft / 3.25 m,  10.66 ft / 3.25 m
      - Forward deck:   30.00 %,  10.66 ft / 3.25 m,  10.66 ft / 3.25 m
      - Aft deck:   35.00 %,  10.66 ft / 3.25 m,  10.66 ft / 3.25 m
      - Quarter deck:   15.00 %,  10.66 ft / 3.25 m,  10.66 ft / 3.25 m
      - Average freeboard:      10.66 ft / 3.25 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 96.6 %
      - Above water (accommodation/working, high = better): 66.0 %
   Waterplane Area: 20,869 Square feet or 1,939 Square metres
   Displacement factor (Displacement / loading): 117 %
   Structure weight / hull surface area: 163 lbs/sq ft or 797 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 1.01
      - Longitudinal: 2.42
      - Overall: 1.10
   Adequate machinery, storage, compartmentation space
   Cramped accommodation and workspace room
   Ship has slow, easy roll, a good, steady gun platform
   Good seaboat, rides out heavy weather easily