Naval propulsion experimental Ship

[ledeper]

Will be build to mercantile standards:

Enter ship name, Enter country Enter ship type laid down 1920

Displacement:
   652 t light; 681 t standard; 987 t normal; 1.232 t full load

Dimensions: Length overall / water x beam x draught
   199,16 ft / 196,85 ft x 36,09 ft x 9,84 ft (normal load)
   60,71 m / 60,00 m x 11,00 m  x 3,00 m

Armament:
      2 - 4,72" / 120 mm guns in single mounts, 52,72lbs / 23,92kg shells, 1920 Model
     Breech loading guns in deck mounts with hoists
     on centreline ends, evenly spread, 1 raised mount
   Weight of broadside 105 lbs / 48 kg
   Shells per gun, main battery: 150

Armour:
   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   0,39" / 10 mm         -               -

Machinery:
   Diesel Internal combustion generators,
   Electric motors, 2 shafts, 4.261 shp / 3.178 Kw = 19,00 kts
   Range 9.000nm at 14,00 kts
   Bunker at max displacement = 551 tons

Complement:
   87 - 114

Cost:
   £0,129 million / $0,518 million

Distribution of weights at normal displacement:
   Armament: 13 tons, 1,3 %
   Armour: 2 tons, 0,2 %
      - Belts: 0 tons, 0,0 %
      - Torpedo bulkhead: 0 tons, 0,0 %
      - Armament: 2 tons, 0,2 %
      - Armour Deck: 0 tons, 0,0 %
      - Conning Tower: 0 tons, 0,0 %
   Machinery: 149 tons, 15,1 %
   Hull, fittings & equipment: 338 tons, 34,3 %
   Fuel, ammunition & stores: 334 tons, 33,9 %
   Miscellaneous weights: 150 tons, 15,2 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     1.592 lbs / 722 Kg = 30,2 x 4,7 " / 120 mm shells or 0,9 torpedoes
   Stability (Unstable if below 1.00): 1,03
   Metacentric height 1,1 ft / 0,3 m
   Roll period: 14,2 seconds
   Steadiness   - As gun platform (Average = 50 %): 81 %
         - Recoil effect (Restricted arc if above 1.00): 0,21
   Seaboat quality  (Average = 1.00): 1,00

Hull form characteristics:
   Hull has a flush deck
   Block coefficient: 0,494
   Length to Beam Ratio: 5,45 : 1
   'Natural speed' for length: 14,03 kts
   Power going to wave formation at top speed: 64 %
   Trim (Max stability = 0, Max steadiness = 100): 81
   Bow angle (Positive = bow angles forward): 10,00 degrees
   Stern overhang: 0,00 ft / 0,00 m
   Freeboard (% = measuring location as a percentage of overall length):
      - Stem:      13,12 ft / 4,00 m
      - Forecastle (10 %):   10,60 ft / 3,23 m
      - Mid (50 %):      10,60 ft / 3,23 m
      - Quarterdeck (15 %):   10,60 ft / 3,23 m
      - Stern:      10,60 ft / 3,23 m
      - Average freeboard:   10,70 ft / 3,26 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 76,5 %
      - Above water (accommodation/working, high = better): 109,2 %
   Waterplane Area: 4.708 Square feet or 437 Square metres
   Displacement factor (Displacement / loading): 178 %
   Structure weight / hull surface area: 48 lbs/sq ft or 235 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0,88
      - Longitudinal: 3,08
      - Overall: 1,00
   Hull space for machinery, storage, compartmentation is excellent
   Room for accommodation and workspaces is adequate
   Ship has slow, easy roll, a good, steady gun platform

[Carthaginian]

A diesel experimental platform?
A nice little storyline ship.

[Sachmle]

A diesel experimental platform?
A nice little storyline ship.

Not just diesel, diesel electric. Someone's working in range for surface ships and speed/range for subs. ;)


PS: I still think that if you have the capital ships diesel tech your SS range should be increased by some % to reflect actual range w/ the diesel. Same with the survivability of electric drive ships, with some agreed upon weight penalty..say 5% of the SS machinery weight must be added to misc weight to account for the electric drive weight since SS doesn't account for it.

[ctwaterman]

I have a Diesel Electric Ship but its a 200 Ton All Purpose Craft I intend to build it
as a Mine Sweeper, MTB Flotilla Leader, and Costal Patrol Craft and ASW and Harbor Net Tender.....

[P3D]

The 500t subs are already diesel-electric. Or diesel/electric.

[ctwaterman]

Yes the new Subs were so I decided to try it with a small utility craft basically 2 of the same engines for the Subs on a small light fast surface ship.   And then it just looked like such a ship could be universally useful.  Build one Ship, mass produce it on one put lots of depth charges in place of the Torpedos, On another Mines, on the last equipment for Mine clearing.