Siamese Ship Test

[Carthaginian]

Just a basic CDS for Siam, to be laid down as part of their 1912 budget.
Made with 'outside assistance,' the ship will signal the end of New Swiss involvement with Siam and the dawn of a relationship with a new ally...

laid down 1912 (Engine 1909)

Displacement:
   4,300 t light; 4,545 t standard; 4,887 t normal; 5,161 t full load

Dimensions: Length overall / water x beam x draught
   374.02 ft / 374.02 ft x 49.21 ft x 13.94 ft (normal load)
   114.00 m / 114.00 m x 15.00 m  x 4.25 m

Armament:
      2 - 12.01" / 305 mm guns in single mounts, 826.73lbs / 375.00kg shells, 1912 Model
     Breech loading guns in turrets (on barbettes)
     on centreline ends, evenly spread
      8 - 5.51" / 140 mm guns in single mounts, 83.78lbs / 38.00kg shells, 1912 Model
     Breech loading guns in casemate mounts
     on side, all amidships
     8 guns in hull casemates - Limited use in all but light seas
      8 - 2.24" / 57.0 mm guns in single mounts, 5.51lbs / 2.50kg shells, 1912 Model
     Breech loading guns in casemate mounts
     on side ends, evenly spread
     8 guns in hull casemates - Limited use in all but light seas
      8 - 3.00" / 76.2 mm guns in single mounts, 13.23lbs / 6.00kg shells, 1912 Model
     Quick firing guns in deck mounts
     on side, evenly spread, all raised mounts
   Weight of broadside 2,474 lbs / 1,122 kg
   Shells per gun, main battery: 100
   8 - 19.7" / 500 mm submerged torpedo tubes

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   5.91" / 150 mm   213.25 ft / 65.00 m   10.66 ft / 3.25 m
   Ends:   2.95" / 75 mm   160.76 ft / 49.00 m   10.66 ft / 3.25 m
   Upper:   2.95" / 75 mm   213.25 ft / 65.00 m   6.56 ft / 2.00 m
     Main Belt covers 88 % of normal length

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   5.91" / 150 mm   1.97" / 50 mm      5.91" / 150 mm
   2nd:   5.91" / 150 mm   1.97" / 50 mm      1.97" / 50 mm
   3rd:   0.98" / 25 mm         -               -
   4th:   0.98" / 25 mm         -               -

   - Armour deck: 1.57" / 40 mm, Conning tower: 5.91" / 150 mm

Machinery:
   Coal fired boilers, steam turbines,
   Direct drive, 2 shafts, 5,000 shp / 3,730 Kw = 16.21 kts
   Range 4,000nm at 10.00 kts
   Bunker at max displacement = 616 tons (100% coal)

Complement:
   291 - 379

Cost:
   £0.454 million / $1.815 million

Distribution of weights at normal displacement:
   Armament: 319 tons, 6.5 %
   Armour: 1,780 tons, 36.4 %
      - Belts: 964 tons, 19.7 %
      - Torpedo bulkhead: 0 tons, 0.0 %
      - Armament: 363 tons, 7.4 %
      - Armour Deck: 417 tons, 8.5 %
      - Conning Tower: 37 tons, 0.7 %
   Machinery: 250 tons, 5.1 %
   Hull, fittings & equipment: 1,886 tons, 38.6 %
   Fuel, ammunition & stores: 587 tons, 12.0 %
   Miscellaneous weights: 64 tons, 1.3 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     7,156 lbs / 3,246 Kg = 8.3 x 12.0 " / 305 mm shells or 1.4 torpedoes
   Stability (Unstable if below 1.00): 1.22
   Metacentric height 2.5 ft / 0.8 m
   Roll period: 13.1 seconds
   Steadiness   - As gun platform (Average = 50 %): 70 %
         - Recoil effect (Restricted arc if above 1.00): 0.76
   Seaboat quality  (Average = 1.00): 1.70

Hull form characteristics:
   Hull has raised forecastle, raised quarterdeck
   Block coefficient: 0.666
   Length to Beam Ratio: 7.60 : 1
   'Natural speed' for length: 19.34 kts
   Power going to wave formation at top speed: 39 %
   Trim (Max stability = 0, Max steadiness = 100): 41
   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:      18.04 ft / 5.50 m
      - Forecastle (20 %):   18.04 ft / 5.50 m (13.94 ft / 4.25 m aft of break)
      - Mid (50 %):      13.94 ft / 4.25 m
      - Quarterdeck (20 %):   18.04 ft / 5.50 m (13.94 ft / 4.25 m before break)
      - Stern:      18.04 ft / 5.50 m
      - Average freeboard:   15.58 ft / 4.75 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 81.5 %
      - Above water (accommodation/working, high = better): 130.6 %
   Waterplane Area: 14,314 Square feet or 1,330 Square metres
   Displacement factor (Displacement / loading): 100 %
   Structure weight / hull surface area: 90 lbs/sq ft or 438 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.94
      - Longitudinal: 1.66
      - 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
   Excellent seaboat, comfortable, can fire her guns in the heaviest weather

[Desertfox]

Who might the new 'ally' be? To tell you the truth, I did NOT want Siam allied to NS when I had Siam, unfortunately no one else was willing to help Siam.

On small detail, Siam used inches from 3" upwards and millimeters from 75mm down. So it would be 12", 6" (or 5"), 3", 50mm 25mm...

Send me your e-mail so I can mail you all the SS2 files, or do you prefer PMs?

[The Rock Doctor]

It's capable, but there's a lot of light guns being stuffed into that rather modest hull.

[Korpen]

Send me your e-mail so I can mail you all the SS2 files, or do you prefer PMs?

Why not just upload them in the enyclopedia section?

[Carthaginian]

No uploading is needed, please.
I already have them. :)

Again, no uploading needed.

It's capable, but there's a lot of light guns being stuffed into that rather modest hull.

They fit quite nicely into the hull. If I had gone with a bit more beam and a slightly heavier ship, I could have fit another pair of 140mm into the hull. Now, those 140mm aren't going to be useful in much of a seaway, but the Gulf of Siam seems like a nice, quiet place for the most part. They should be useful in the coastal environments that this ship would be most suited for.

[The Rock Doctor]

I was thinking in terms of weapons volume and deck space, rather than weapon weight. 

However, a skim of references suggests you're right in this case, so I withdraw my comment.

[Borys]

Ahoj!
Wouldn't a twin on such a small hull be better?

Borys

[Carthaginian]

A twin for the mains?
Siam lacks a proper gun for that, as does the sponsor.
Perhaps the follow-up will remedy that problem...
If a willing construction partner can be found.


Siam has a lot of obsolesant vessels that need scrapping.
They might be in the market to trade scrap for a ship.
Also, a lot of NS tech was transfered to Siam... so that's out there, too.

[The Rock Doctor]

Two singles work better on that beam, give you 360 degree fire, and keeps the ship from losing her entire main battery in one hit - I'd stick with what you have there.