Baltic Confederation Fleet-Cruiser

Started by ledeper, February 21, 2008, 02:54:34 PM

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ledeper

City Class , Baltic Confederation     Fleet-Cruiser laid down 1912

Displacement:
   11.805 t light; 12.314 t standard; 13.400 t normal; 14.269 t full load

Dimensions: Length overall / water x beam x draught
   620,81 ft / 613,52 ft x 62,34 ft x 24,61 ft (normal load)
   189,22 m / 187,00 m x 19,00 m  x 7,50 m

Armament:
      9 - 8,00" / 203 mm guns (3 mounts), 256,00lbs / 116,12kg shells, 1912 Model
     Breech loading guns in turrets (on barbettes)
     on centreline ends, majority forward, 4 raised guns - superfiring
      12 - 4,00" / 102 mm guns in single mounts, 32,00lbs / 14,51kg shells, 1912 Model
     Quick firing guns in deck mounts
     on side, all amidships
      4 - 3,46" / 88,0 mm guns in single mounts, 20,79lbs / 9,43kg shells, 1912 Model
     Quick firing guns in deck mounts
     on side, evenly spread
   Weight of broadside 2.771 lbs / 1.257 kg
   Shells per gun, main battery: 150

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   8,00" / 203 mm   398,79 ft / 121,55 m   9,47 ft / 2,89 m
   Ends:   Unarmoured
   Upper:   4,00" / 102 mm   398,79 ft / 121,55 m   8,00 ft / 2,44 m
     Main Belt covers 100 % of normal length

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   8,00" / 203 mm   2,00" / 51 mm      6,00" / 152 mm
   2nd:   2,00" / 51 mm         -               -
   3rd:   0,50" / 13 mm         -               -

   - Armour deck: 2,00" / 51 mm, Conning tower: 8,00" / 203 mm

Machinery:
   Oil fired boilers, steam turbines,
   Electric motors, 4 shafts, 77.065 shp / 57.490 Kw = 30,00 kts
   Range 7.500nm at 12,00 kts
   Bunker at max displacement = 1.954 tons

Complement:
   622 - 809

Cost:
   £1,134 million / $4,537 million

Distribution of weights at normal displacement:
   Armament: 346 tons, 2,6 %
   Armour: 3.393 tons, 25,3 %
      - Belts: 1.792 tons, 13,4 %
      - Torpedo bulkhead: 0 tons, 0,0 %
      - Armament: 563 tons, 4,2 %
      - Armour Deck: 941 tons, 7,0 %
      - Conning Tower: 97 tons, 0,7 %
   Machinery: 3.073 tons, 22,9 %
   Hull, fittings & equipment: 4.693 tons, 35,0 %
   Fuel, ammunition & stores: 1.595 tons, 11,9 %
   Miscellaneous weights: 300 tons, 2,2 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     14.063 lbs / 6.379 Kg = 54,9 x 8,0 " / 203 mm shells or 1,7 torpedoes
   Stability (Unstable if below 1.00): 1,11
   Metacentric height 3,0 ft / 0,9 m
   Roll period: 15,2 seconds
   Steadiness   - As gun platform (Average = 50 %): 56 %
         - Recoil effect (Restricted arc if above 1.00): 0,52
   Seaboat quality  (Average = 1.00): 1,11

Hull form characteristics:
   Hull has a flush deck
   Block coefficient: 0,498
   Length to Beam Ratio: 9,84 : 1
   'Natural speed' for length: 24,77 kts
   Power going to wave formation at top speed: 52 %
   Trim (Max stability = 0, Max steadiness = 100): 50
   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:      27,23 ft / 8,30 m
      - Forecastle (20 %):   17,32 ft / 5,28 m
      - Mid (50 %):      17,32 ft / 5,28 m
      - Quarterdeck (15 %):   17,32 ft / 5,28 m
      - Stern:      17,32 ft / 5,28 m
      - Average freeboard:   18,12 ft / 5,52 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 97,2 %
      - Above water (accommodation/working, high = better): 135,0 %
   Waterplane Area: 25.444 Square feet or 2.364 Square metres
   Displacement factor (Displacement / loading): 106 %
   Structure weight / hull surface area: 114 lbs/sq ft or 555 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0,98
      - Longitudinal: 1,26
      - Overall: 1,00
   Hull space for machinery, storage, compartmentation is adequate
   Room for accommodation and workspaces is excellent


P3D

Apparently we are not far off from building WWII designs. One can could get a destroyer with only two knots of speed advantage on 1000t with 1912 engines and that won't have misc. weight for many torpedoes and forget fire control equipment. OTOH I can get a 32kts light cruiser on 7000t. Sadly current rules does not allow DDs to have any speed advantage.

As the destroyer rules works to some extent for lower speeds, what about doubling every knots a destroyer has over 29kts? 30->31, 31->33? Seakeeping could then be adjusted by 0.10/1knot.

Enter ship name, Enter country Enter ship type laid down 1912

Displacement:
   6,996 t light; 7,214 t standard; 7,900 t normal; 8,449 t full load

Dimensions: Length overall / water x beam x draught
   543.00 ft / 540.00 ft x 54.00 ft x 21.00 ft (normal load)
   165.51 m / 164.59 m x 16.46 m  x 6.40 m

Armament:
      6 - 6.00" / 152 mm guns in single mounts, 108.00lbs / 48.99kg shells, 1907 Model
     Breech loading guns in deck mounts with hoists
     on centreline, evenly spread, 2 raised mounts
      4 - 3.00" / 76.2 mm guns in single mounts, 13.50lbs / 6.12kg shells, 1907 Model
     Breech loading guns in deck mounts
     on side, all amidships
   Weight of broadside 702 lbs / 318 kg
   Shells per gun, main battery: 150
   8 - 21.0" / 533.4 mm above water torpedoes

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   3.00" / 76 mm   464.00 ft / 141.43 m   13.00 ft / 3.96 m
   Ends:   Unarmoured
     Main Belt covers 132 % of normal length

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   2.00" / 51 mm         -         1.00" / 25 mm

   - Armour deck: 1.00" / 25 mm

Machinery:
   Oil fired boilers, steam turbines,
   Direct drive, 4 shafts, 74,127 shp / 55,299 Kw = 32.00 kts
   Range 4,000nm at 15.00 kts
   Bunker at max displacement = 1,235 tons

Complement:
   418 - 544

Cost:
   £0.732 million / $2.929 million

Distribution of weights at normal displacement:
   Armament: 88 tons, 1.1 %
   Armour: 1,108 tons, 14.0 %
      - Belts: 720 tons, 9.1 %
      - Torpedo bulkhead: 0 tons, 0.0 %
      - Armament: 43 tons, 0.5 %
      - Armour Deck: 345 tons, 4.4 %
      - Conning Tower: 0 tons, 0.0 %
   Machinery: 2,956 tons, 37.4 %
   Hull, fittings & equipment: 2,695 tons, 34.1 %
   Fuel, ammunition & stores: 904 tons, 11.4 %
   Miscellaneous weights: 150 tons, 1.9 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     5,479 lbs / 2,485 Kg = 50.7 x 6.0 " / 152 mm shells or 0.9 torpedoes
   Stability (Unstable if below 1.00): 1.31
   Metacentric height 3.2 ft / 1.0 m
   Roll period: 12.6 seconds
   Steadiness   - As gun platform (Average = 50 %): 60 %
         - Recoil effect (Restricted arc if above 1.00): 0.20
   Seaboat quality  (Average = 1.00): 1.07

Hull form characteristics:
   Hull has rise forward of midbreak
   Block coefficient: 0.452
   Length to Beam Ratio: 10.00 : 1
   'Natural speed' for length: 23.24 kts
   Power going to wave formation at top speed: 57 %
   Trim (Max stability = 0, Max steadiness = 100): 56
   Bow angle (Positive = bow angles forward): 0.00 degrees
   Stern overhang: 3.00 ft / 0.91 m
   Freeboard (% = measuring location as a percentage of overall length):
      - Stem:      24.00 ft / 7.32 m
      - Forecastle (20 %):   22.00 ft / 6.71 m
      - Mid (40 %):      22.00 ft / 6.71 m (14.00 ft / 4.27 m aft of break)
      - Quarterdeck (15 %):   14.00 ft / 4.27 m
      - Stern:      14.00 ft / 4.27 m
      - Average freeboard:   17.36 ft / 5.29 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 131.9 %
      - Above water (accommodation/working, high = better): 113.3 %
   Waterplane Area: 18,624 Square feet or 1,730 Square metres
   Displacement factor (Displacement / loading): 100 %
   Structure weight / hull surface area: 86 lbs/sq ft or 422 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.96
      - Longitudinal: 1.39
      - Overall: 1.00
   Hull space for machinery, storage, compartmentation is cramped
   Room for accommodation and workspaces is adequate
The first purpose of a warship is to remain afloat. Anon.
Below 40 degrees, there is no law. Below 50 degrees, there is no God. sailor's maxim on weather in the Southern seas

ledeper

Do you know where I can find any WW1 cruiser designs?
I have the impression that in OTL they only buildi Battlecruisers,so I am open to other eventual designs and suggestions

Korpen

Quote from: ledeper on February 21, 2008, 04:18:30 PM
Do you know where I can find any WW1 cruiser designs?
I have the impression that in OTL they only buildi Battlecruisers,so I am open to other eventual designs and suggestions
There is quite a lot of links in the  "Data and information about ships" ( http://www.navalism.org/index.php?topic=727.0 ) -thread.

There were lots of cruisers built, just not any that was similar to the later "treaty" cruisers. This for the simple reason that the were no point in building them prior to the treaty.

There might be a place for such ships here as our rules forbids ships close to real life battlecruisers (as BCs made medium-class cruisers obsolete) in speed and capabillites.
Card-carrying member of the Battlecruiser Fan Club.

Ithekro

Aside from scouting light cruisers there aren't really any Great War cruisers aside from some late war designs (HMS Enterprise, USS Omaha, and the like)

P3D

I'd note that the countries that had turbine  cruisers during WWI were UK, Germany, AH, Italy and Japan - with Russian ships that did not get finished until the 1930s.

Ships here:

http://www.warshipsww2.eu/staty.php?language=E&period=
The first purpose of a warship is to remain afloat. Anon.
Below 40 degrees, there is no law. Below 50 degrees, there is no God. sailor's maxim on weather in the Southern seas