Baltic Confederation Destroyers

[ledeper]

Island Class, Baltic Confederation Destroyer laid down 1908

Displacement:
   443 t light; 464 t standard; 581 t normal; 674 t full load

Dimensions: Length overall / water x beam x draught
   219,50 ft / 213,25 ft x 16,40 ft x 11,48 ft (normal load)
   66,90 m / 65,00 m x 5,00 m  x 3,50 m

Armament:
      3 - 4,00" / 102 mm guns in single mounts, 32,00lbs / 14,51kg shells, 1908 Model
     Breech loading guns in deck mounts
     on centreline ends, majority forward
      4 - 1,57" / 40,0 mm guns (3 mounts), 1,95lbs / 0,89kg shells, 1908 Model
     Breech loading guns in deck mounts
     on side, evenly spread
   Weight of broadside 104 lbs / 47 kg
   Shells per gun, main battery: 150
   2 - 18,0" / 457,2 mm above water torpedoes

Armour:

   - Conning tower: 0,50" / 13 mm

Machinery:
   Oil fired boilers, steam turbines,
   Direct drive, 2 shafts, 11.376 shp / 8.486 Kw = 27,00 kts
   Range 1.500nm at 18,00 kts
   Bunker at max displacement = 210 tons

Complement:
   58 - 76

Cost:
   £0,067 million / $0,269 million

Distribution of weights at normal displacement:
   Armament: 13 tons, 2,2 %
   Armour: 1 tons, 0,1 %
      - Belts: 0 tons, 0,0 %
      - Torpedo bulkhead: 0 tons, 0,0 %
      - Armament: 0 tons, 0,0 %
      - Armour Deck: 0 tons, 0,0 %
      - Conning Tower: 1 tons, 0,1 %
   Machinery: 291 tons, 50,1 %
   Hull, fittings & equipment: 134 tons, 23,0 %
   Fuel, ammunition & stores: 138 tons, 23,7 %
   Miscellaneous weights: 5 tons, 0,9 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     123 lbs / 56 Kg = 3,8 x 4,0 " / 102 mm shells or 0,1 torpedoes
   Stability (Unstable if below 1.00): 1,27
   Metacentric height 0,5 ft / 0,2 m
   Roll period: 9,6 seconds
   Steadiness   - As gun platform (Average = 50 %): 64 %
         - Recoil effect (Restricted arc if above 1.00): 0,76
   Seaboat quality  (Average = 1.00): 1,28

Hull form characteristics:
   Hull has a flush deck
   Block coefficient: 0,506
   Length to Beam Ratio: 13,00 : 1
   'Natural speed' for length: 14,60 kts
   Power going to wave formation at top speed: 68 %
   Trim (Max stability = 0, Max steadiness = 100): 50
   Bow angle (Positive = bow angles forward): 25,00 degrees
   Stern overhang: 0,00 ft / 0,00 m
   Freeboard (% = measuring location as a percentage of overall length):
      - Stem:      13,39 ft / 4,08 m
      - Forecastle (20 %):   9,84 ft / 3,00 m
      - Mid (50 %):      9,84 ft / 3,00 m
      - Quarterdeck (15 %):   9,84 ft / 3,00 m
      - Stern:      9,84 ft / 3,00 m
      - Average freeboard:   10,13 ft / 3,09 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 179,8 %
      - Above water (accommodation/working, high = better): 53,8 %
   Waterplane Area: 2.344 Square feet or 218 Square metres
   Displacement factor (Displacement / loading): 46 %
   Structure weight / hull surface area: 18 lbs/sq ft or 90 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0,46
      - Longitudinal: 3,93
      - Overall: 0,57
   Hull space for machinery, storage, compartmentation is cramped
   Room for accommodation and workspaces is cramped
   Good seaboat, rides out heavy weather easily

Will be named after Confederation islands

[Korpen]

Island Class, Baltic Confederation Destroyer laid down 1908

   Hull strength (Relative):
      - Cross-sectional: 0,46
      - Longitudinal: 3,93
      - Overall: 0,57
   Hull space for machinery, storage, compartmentation is cramped
   Room for accommodation and workspaces is cramped
   Good seaboat, rides out heavy weather easily

Formalia first: Ships that have a hull strenght of less the 1,0 have to have a cross-sectional strength of at least 0,5, this boat have a cross-sectional strength of 0,46.

I take it these ships are for service in the baltic? then som more misc weight for either a radio set (10t) or mines would be a good idea.

[ledeper]

Island Class , Baltic Confederation Destroyer laid down 1908

Displacement:
   529 t light; 550 t standard; 626 t normal; 686 t full load

Dimensions: Length overall / water x beam x draught
   217,56 ft / 213,25 ft x 16,40 ft x 11,48 ft (normal load)
   66,31 m / 65,00 m x 5,00 m  x 3,50 m

Armament:
      3 - 4,02" / 102 mm guns in single mounts, 32,38lbs / 14,69kg shells, 1908 Model
     Breech loading guns in deck mounts
     on centreline ends, majority forward
   Weight of broadside 97 lbs / 44 kg
   Shells per gun, main battery: 150

Armour:

   - Conning tower: 0,51" / 13 mm

Machinery:
   Oil fired boilers, steam turbines,
   Direct drive, 1 shaft, 11.215 shp / 8.367 Kw = 26,50 kts
   Range 1.500nm at 15,00 kts
   Bunker at max displacement = 136 tons

Complement:
   62 - 81

Cost:
   £0,071 million / $0,282 million

Distribution of weights at normal displacement:
   Armament: 12 tons, 1,9 %
   Armour: 1 tons, 0,1 %
      - Belts: 0 tons, 0,0 %
      - Torpedo bulkhead: 0 tons, 0,0 %
      - Armament: 0 tons, 0,0 %
      - Armour Deck: 0 tons, 0,0 %
      - Conning Tower: 1 tons, 0,1 %
   Machinery: 299 tons, 47,7 %
   Hull, fittings & equipment: 148 tons, 23,6 %
   Fuel, ammunition & stores: 96 tons, 15,4 %
   Miscellaneous weights: 70 tons, 11,2 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     128 lbs / 58 Kg = 4,0 x 4,0 " / 102 mm shells or 0,1 torpedoes
   Stability (Unstable if below 1.00): 1,10
   Metacentric height 0,4 ft / 0,1 m
   Roll period: 10,9 seconds
   Steadiness   - As gun platform (Average = 50 %): 45 %
         - Recoil effect (Restricted arc if above 1.00): 0,71
   Seaboat quality  (Average = 1.00): 1,11

Hull form characteristics:
   Hull has a flush deck
   Block coefficient: 0,545
   Length to Beam Ratio: 13,00 : 1
   'Natural speed' for length: 14,60 kts
   Power going to wave formation at top speed: 69 %
   Trim (Max stability = 0, Max steadiness = 100): 37
   Bow angle (Positive = bow angles forward): 15,00 degrees
   Stern overhang: 0,00 ft / 0,00 m
   Freeboard (% = measuring location as a percentage of overall length):
      - Stem:      16,08 ft / 4,90 m
      - Forecastle (20 %):   9,84 ft / 3,00 m
      - Mid (50 %):      9,84 ft / 3,00 m
      - Quarterdeck (15 %):   9,84 ft / 3,00 m
      - Stern:      9,84 ft / 3,00 m
      - Average freeboard:   10,34 ft / 3,15 m

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 180,9 %
      - Above water (accommodation/working, high = better): 71,2 %
   Waterplane Area: 2.355 Square feet or 219 Square metres
   Displacement factor (Displacement / loading): 48 %
   Structure weight / hull surface area: 20 lbs/sq ft or 96 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0,50
      - Longitudinal: 4,26
      - Overall: 0,62
   Hull space for machinery, storage, compartmentation is cramped
   Room for accommodation and workspaces is cramped

[Sachmle]

A destroyer with no torpedos!?!?

[Borys]

Ahoj!
A destroyer is to destroy TBs. It does not need torpedos for that :)
The TTs are somewhere in those 70 tonnes, I presume.
Borys

[Sachmle]

I'm well aware of the purpose of destroyers, and I assumed the TTs were in the 70 tons aswell. I was just pointing it out.

[Borys]

Ahoj!
Sorry!
Borys

[Sachmle]

No appologies necessary. I was just trying to enlighten ledeper on the fact that when he edited his design he forget to include the TTs the second time around.  If anything I should appologies to you for comming across as short or cross.  I was not.

[P3D]

You don't need so much misc. weight. 15t should be enough, the rest can go in to oil bunkers.

[Korpen]

You don't need so much misc. weight. 15t should be enough, the rest can go in to oil bunkers.

Well it could be used for loads of sweet mines. :)
And for a ship in the baltic, I think that might be a better idea then loads of range.

[ledeper]

yeah,I know forgot 2 tt,sigh

[P3D]

You don't need so much misc. weight. 15t should be enough, the rest can go in to oil bunkers.

Well it could be used for loads of sweet mines. :)
And for a ship in the baltic, I think that might be a better idea then loads of range.

You can always sacrifice bunkerage for mines on the ship. I see no reason why the ship would not be used in the North Sea too.