New Zion Cruiser

[Desertfox]

*grumble* I come up with an interesting gun arrangement and then Korpen beats me to the punch.

More of a concept. A light cruiser capable of matching the DKB KKs. Would look very much like the 720 ton destroyers to fool enemy ships at a distance. Unfortunately not enough misc weight for mines. There's another design being trown around but would Omaha style gunhouses be possible with 7" guns?

New Zion Light Cruiser laid down 1912

Displacement:
   3,101 t light; 3,274 t standard; 3,633 t normal; 3,920 t full load

Dimensions: Length overall / water x beam x draught
   390.00 ft / 390.00 ft x 39.00 ft x 19.00 ft (normal load)
   118.87 m / 118.87 m x 11.89 m  x 5.79 m

Armament:
      3 - 7.00" / 178 mm guns in single mounts, 170.00lbs / 77.11kg shells, 1912 Model
     Breech loading guns in deck mounts with hoists
     on centreline ends, majority aft, 1 raised mount aft
      2 - 7.00" / 178 mm guns in single mounts, 170.00lbs / 77.11kg shells, 1912 Model
     Breech loading guns in deck mounts with hoists
     on side, all amidships
      6 - 3.00" / 76.2 mm guns in single mounts, 13.50lbs / 6.12kg shells, 1912 Model
     Quick firing guns in deck mounts
     on side, evenly spread
   Weight of broadside 931 lbs / 422 kg
   Shells per gun, main battery: 180
   6 - 20.0" / 508 mm above water torpedoes

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   3.00" / 76 mm   315.00 ft / 96.01 m   7.00 ft / 2.13 m
   Ends:   Unarmoured
     Main Belt covers 124 % of normal length

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   1.50" / 38 mm         -               -

   - Armour deck: 1.50" / 38 mm, Conning tower: 1.50" / 38 mm

Machinery:
   Oil fired boilers, steam turbines,
   Direct drive, 3 shafts, 26,424 shp / 19,712 Kw = 27.00 kts
   Range 3,300nm at 15.00 kts
   Bunker at max displacement = 646 tons

Complement:
   233 - 304

Cost:
   £0.354 million / $1.418 million

Distribution of weights at normal displacement:
   Armament: 117 tons, 3.2 %
   Armour: 559 tons, 15.4 %
      - Belts: 266 tons, 7.3 %
      - Torpedo bulkhead: 0 tons, 0.0 %
      - Armament: 19 tons, 0.5 %
      - Armour Deck: 267 tons, 7.4 %
      - Conning Tower: 8 tons, 0.2 %
   Machinery: 1,053 tons, 29.0 %
   Hull, fittings & equipment: 1,331 tons, 36.6 %
   Fuel, ammunition & stores: 532 tons, 14.7 %
   Miscellaneous weights: 40 tons, 1.1 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     2,638 lbs / 1,197 Kg = 15.4 x 7.0 " / 178 mm shells or 0.7 torpedoes
   Stability (Unstable if below 1.00): 1.18
   Metacentric height 1.7 ft / 0.5 m
   Roll period: 12.7 seconds
   Steadiness   - As gun platform (Average = 50 %): 51 %
         - Recoil effect (Restricted arc if above 1.00): 0.70
   Seaboat quality  (Average = 1.00): 1.01

Hull form characteristics:
   Hull has rise forward of midbreak
   Block coefficient: 0.440
   Length to Beam Ratio: 10.00 : 1
   'Natural speed' for length: 19.75 kts
   Power going to wave formation at top speed: 55 %
   Trim (Max stability = 0, Max steadiness = 100): 50
   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:      17.00 ft / 5.18 m
      - Forecastle (20 %):   15.50 ft / 4.72 m
      - Mid (50 %):      15.50 ft / 4.72 m (10.00 ft / 3.05 m aft of break)
      - Quarterdeck (15 %):   10.00 ft / 3.05 m
      - Stern:      10.00 ft / 3.05 m
      - Average freeboard:   12.87 ft / 3.92 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 120.7 %
      - Above water (accommodation/working, high = better): 74.3 %
   Waterplane Area: 9,625 Square feet or 894 Square metres
   Displacement factor (Displacement / loading): 100 %
   Structure weight / hull surface area: 77 lbs/sq ft or 374 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.93
      - Longitudinal: 1.90
      - Overall: 1.00
   Hull space for machinery, storage, compartmentation is cramped
   Room for accommodation and workspaces is cramped

[Korpen]

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   3.00" / 76 mm   315.00 ft / 96.01 m   7.00 ft / 2.13 m
   Ends:   Unarmoured
     Main Belt covers 124 % of normal length

I think the belt would be better if it was thinner but more extensive, with a height of just 2m, parts of it will be submerged pretty much all the time.

[Jefgte]

I agree with Korpen


"...
Seaboat quality  (Average = 1.00): 1.01
...
Hull space for machinery, storage, compartmentation is cramped
   Room for accommodation and workspaces is cramped
..."

That's not cool  :-\


Jef  ;)