Amazon Ad

Monday, April 03, 2006

The F/CA/1933 design

The F/CA/1933 design is actually better protected, due to the "all-or-nothing" approach. Belt is 16ft high and 10ft longer. The torpedo bulkhead is a foot higher. The armour deck is now 2.5in. The armament is somewhat improved, as the 13cm guns are now dual-purpose, and the heavy AA guns (perhaps redundant) are now 10cm. There are more light AA guns, as well. The torpedo armament is now 8-21.6in TT. The roll period is greater: 15.2 seconds. This is the Springsharp report:]
F/CA/1933, France Cruiser laid down 1933 (Engine 1938)

Displacement:
 14,338 t light; 14,939 t standard; 16,000 t normal; 16,849 t full load

Dimensions: Length overall / water x beam x draught
 669.71 ft / 665.00 ft x 66.00 ft x 23.00 ft (normal load)
 204.13 m / 202.69 m x 20.12 m  x 7.01 m

Armament:
      9 - 9.45" / 240 mm guns (3x3 guns), 421.80lbs / 191.32kg shells, 1933 Model
   Breech loading guns in turrets (on barbettes)
   on centreline ends, majority forward, 1 raised mount - superfiring
      8 - 5.12" / 130 mm guns (4x2 guns), 67.03lbs / 30.41kg shells, 1933 Model
   Dual purpose guns in deck mounts with hoists
   on side, all amidships
      12 - 3.94" / 100 mm guns (6x2 guns), 30.51lbs / 13.84kg shells, 1933 Model
   Anti-aircraft guns in deck mounts 
   on side, all amidships, all raised mounts - superfiring
      32 - 1.85" / 47.0 mm guns (16x2 guns), 3.17lbs / 1.44kg shells, 1933 Model
   Anti-aircraft guns in deck mounts 
   on side, evenly spread, 12 raised mounts
 Weight of broadside 4,800 lbs / 2,177 kg
 Shells per gun, main battery: 100
 8 - 21.7" / 549.9999 mm above water torpedoes

Armour:
   - Belts:  Width (max) Length (avg)  Height (avg)
 Main: 4.00" / 102 mm 460.00 ft / 140.21 m 16.00 ft / 4.88 m
 Ends: Unarmoured
   Main Belt covers 106 % of normal length
   Main belt does not fully cover magazines and engineering spaces

   - Torpedo Bulkhead:
  1.00" / 25 mm 460.00 ft / 140.21 m 22.00 ft / 6.71 m

   - Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
 Main: 4.00" / 102 mm 3.00" / 76 mm  4.00" / 102 mm
 2nd: 2.00" / 51 mm 2.00" / 51 mm  2.00" / 51 mm

   - Armour deck: 2.50" / 64 mm, Conning tower: 4.00" / 102 mm

Machinery:
 Oil fired boilers, steam turbines, 
 Geared drive, 4 shafts, 124,748 shp / 93,062 Kw = 33.00 kts
 Range 6,500nm at 15.00 kts
 Bunker at max displacement = 1,911 tons

Complement:
 710 - 924

Cost:
 £7.015 million / $28.062 million

Distribution of weights at normal displacement:
 Armament: 600 tons, 3.7 %
 Armour: 3,652 tons, 22.8 %
    - Belts: 1,216 tons, 7.6 %
    - Torpedo bulkhead: 374 tons, 2.3 %
    - Armament: 584 tons, 3.7 %
    - Armour Deck: 1,423 tons, 8.9 %
    - Conning Tower: 55 tons, 0.3 %
 Machinery: 3,416 tons, 21.3 %
 Hull, fittings & equipment: 6,670 tons, 41.7 %
 Fuel, ammunition & stores: 1,662 tons, 10.4 %
 Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
 Survivability (Non-critical penetrating hits needed to sink ship):
   19,544 lbs / 8,865 Kg = 46.3 x 9.4 " / 240 mm shells or 2.4 torpedoes
 Stability (Unstable if below 1.00): 1.12
 Metacentric height 3.3 ft / 1.0 m
 Roll period: 15.2 seconds
 Steadiness - As gun platform (Average = 50 %): 54 %
   - Recoil effect (Restricted arc if above 1.00): 0.93
 Seaboat quality  (Average = 1.00): 1.08

Hull form characteristics:
 Hull has rise forward of midbreak
 Block coefficient: 0.555
 Length to Beam Ratio: 10.08 : 1
 'Natural speed' for length: 25.79 kts
 Power going to wave formation at top speed: 57 %
 Trim (Max stability = 0, Max steadiness = 100): 50
 Bow angle (Positive = bow angles forward): 5.00 degrees
 Stern overhang: 2.00 ft / 0.61 m
 Freeboard (% = measuring location as a percentage of overall length):
    - Stem:  31.00 ft / 9.45 m
    - Forecastle (20 %): 25.00 ft / 7.62 m
    - Mid (67 %):  25.00 ft / 7.62 m (17.00 ft / 5.18 m aft of break)
    - Quarterdeck (15 %): 17.00 ft / 5.18 m
    - Stern:  17.00 ft / 5.18 m
    - Average freeboard: 22.84 ft / 6.96 m

Ship space, strength and comments:
 Space - Hull below water (magazines/engines, low = better): 140.1 %
  - Above water (accommodation/working, high = better): 163.0 %
 Waterplane Area: 30,767 Square feet or 2,858 Square metres
 Displacement factor (Displacement / loading): 105 %
 Structure weight / hull surface area: 133 lbs/sq ft or 648 Kg/sq metre
 Hull strength (Relative):
  - Cross-sectional: 0.96
  - Longitudinal: 1.42
  - Overall: 1.00
 Hull space for machinery, storage, compartmentation is cramped
 Room for accommodation and workspaces is excellent

No comments:

Amazon Context Links