- Replacements for old armoured cruisers scrapped because of CT
- New 203mm/53 weapon in duple turrets firing a 125.3kg shell at 900m/s
- 100mm/47 gun with 13.8kg shells as powerful secondary armament
- Normal AA fit of 47mm and 20mm guns
- Poweful 600mm torpedo armament
- One catapult mounted forward with 2 aircraft
- Armoured against 152mm guns and partially against 203mm weapons
- Armour belt thins to 100mm thick at lower edge
- No deck armour forward. Single 90mm lamina over citadel on top of main belt armour. 50mm Lamina over steering gear. Average 70mm thickness
- Looks damn good
RM Zara, Italian Cruiser laid down 1927
Displacement:
11,249 t light; 11,752 t standard; 13,065 t normal; 14,115 t full load
Dimensions: Length overall / water x beam x draught
603.39 ft / 590.55 ft x 67.59 ft x 23.62 ft (normal load)
183.91 m / 180.00 m x 20.60 m x 7.20 m
Armament:
8 - 7.99" / 203 mm guns (4x2 guns), 276.24lbs / 125.30kg shells, 1927 Model
Breech loading guns in turrets (on barbettes)
on centreline ends, evenly spread, 2 raised mounts - superfiring
16 - 3.94" / 100 mm guns (8x2 guns), 30.42lbs / 13.80kg shells, 1927 Model
Quick firing guns in deck mounts with hoists
on side ends, evenly spread
12 - 1.85" / 47.0 mm guns (4x3 guns), 3.86lbs / 1.75kg shells, 1927 Model
Anti-aircraft guns in deck mounts
on side, all aft
12 - 0.79" / 20.0 mm guns in single mounts, 0.24lbs / 0.11kg shells, 1927 Model
Anti-aircraft guns in deck mounts
on side, evenly spread
Weight of broadside 2,746 lbs / 1,245 kg
Shells per gun, main battery: 150
6 - 23.6" / 600 mm above water torpedoes
Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 5.91" / 150 mm 366.96 ft / 111.85 m 9.84 ft / 3.00 m
Ends: Unarmoured
Main Belt covers 96 % of normal length
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 5.91" / 150 mm 3.94" / 100 mm 3.94" / 100 mm
2nd: 1.18" / 30 mm 0.79" / 20 mm -
3rd: 0.39" / 10 mm - -
- Armour deck: 2.76" / 70 mm, Conning tower: 5.91" / 150 mm
Machinery:
Oil fired boilers, steam turbines,
Geared drive, 2 shafts, 96,400 shp / 71,914 Kw = 31.65 kts
Range 4,235nm at 20.00 kts
Bunker at max displacement = 2,364 tons
Complement:
610 - 794
Cost:
£3.962 million / $15.850 million
Distribution of weights at normal displacement:
Armament: 321 tons, 2.5 %
Armour: 2,818 tons, 21.6 %
- Belts: 905 tons, 6.9 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 505 tons, 3.9 %
- Armour Deck: 1,338 tons, 10.2 %
- Conning Tower: 71 tons, 0.5 %
Machinery: 3,043 tons, 23.3 %
Hull, fittings & equipment: 5,016 tons, 38.4 %
Fuel, ammunition & stores: 1,816 tons, 13.9 %
Miscellaneous weights: 50 tons, 0.4 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
16,030 lbs / 7,271 Kg = 62.8 x 8.0 " / 203 mm shells or 1.9 torpedoes
Stability (Unstable if below 1.00): 1.17
Metacentric height 3.7 ft / 1.1 m
Roll period: 14.8 seconds
Steadiness - As gun platform (Average = 50 %): 54 %
- Recoil effect (Restricted arc if above 1.00): 0.48
Seaboat quality (Average = 1.00): 1.02
Hull form characteristics:
Hull has rise forward of midbreak
Block coefficient: 0.485
Length to Beam Ratio: 8.74 : 1
'Natural speed' for length: 24.30 kts
Power going to wave formation at top speed: 57 %
Trim (Max stability = 0, Max steadiness = 100): 53
Bow angle (Positive = bow angles forward): 20.00 degrees
Stern overhang: 3.28 ft / 1.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 26.25 ft / 8.00 m
- Forecastle (19 %): 22.97 ft / 7.00 m
- Mid (65 %): 22.97 ft / 7.00 m (13.12 ft / 4.00 m aft of break)
- Quarterdeck (19 %): 13.12 ft / 4.00 m
- Stern: 13.12 ft / 4.00 m
- Average freeboard: 19.77 ft / 6.03 m
Ship tends to be wet forward
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 95.6 %
- Above water (accommodation/working, high = better): 145.4 %
Waterplane Area: 26,236 Square feet or 2,437 Square metres
Displacement factor (Displacement / loading): 113 %
Structure weight / hull surface area: 121 lbs/sq ft or 592 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.97
- Longitudinal: 1.53
- Overall: 1.01
Hull space for machinery, storage, compartmentation is adequate
Room for accommodation and workspaces is excellent