Ships in Class
San Calepodio Layed down 1932, reconstructed 1943
San Calimero Layed down 1932, reconstructed 1943
Picture is pre-refit. By RA.
Displacement:
6,905 t light; 7,337 t standard; 8,751 t normal; 9,882 t full load
Dimensions: Length overall / water x beam x draught
579.02 ft / 557.74 ft x 58.73 ft x 18.70 ft (normal load)
176.48 m / 170.00 m x 17.90 m x 5.70 m
Armament:
8 - 5.98" / 152 mm guns (4x2 guns), 99.21lbs / 45.00kg shells, 1943 Model
Dual purpose guns in turrets (on barbettes)
on centreline ends, evenly spread, 2 raised mounts - superfiring
16 - 2.99" / 76.0 mm guns (8x2 guns), 14.86lbs / 6.74kg shells, 1943 Model
Automatic rapid fire guns in deck mounts with hoists
on side, all amidships, 4 raised mounts - superfiring
12 - 1.46" / 37.0 mm guns (6x2 guns), 1.55lbs / 0.70kg shells, 1943 Model
Anti-aircraft guns in deck mounts
on side, evenly spread
12 - 0.98" / 25.0 mm guns in single mounts, 0.48lbs / 0.22kg shells, 1943 Model
Breech loading guns in deck mounts
on side, evenly spread
Weight of broadside 1,056 lbs / 479 kg
Shells per gun, main battery: 400
Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 2.76" / 70 mm 360.89 ft / 110.00 m 11.48 ft / 3.50 m
Ends: Unarmoured
Upper: 1.18" / 30 mm 229.66 ft / 70.00 m 8.20 ft / 2.50 m
Main Belt covers 100 % of normal length
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 5.31" / 135 mm 2.76" / 70 mm 2.76" / 70 mm
2nd: 1.18" / 30 mm 0.79" / 20 mm 0.79" / 20 mm
3rd: 0.39" / 10 mm 0.39" / 10 mm -
4th: 0.39" / 10 mm - -
- Armour deck: 1.57" / 40 mm, Conning tower: 2.76" / 70 mm
Machinery:
Oil fired boilers, steam turbines,
Geared drive, 2 shafts, 62,000 shp / 46,252 Kw = 31.11 kts
Range 4,200nm at 25.00 kts
Bunker at max displacement = 2,545 tons
Complement:
452 - 588
Cost:
£2.661 million / $10.644 million
Distribution of weights at normal displacement:
Armament: 142 tons, 1.6 %
Armour: 1,536 tons, 17.6 %
- Belts: 579 tons, 6.6 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 271 tons, 3.1 %
- Armour Deck: 661 tons, 7.6 %
- Conning Tower: 25 tons, 0.3 %
Machinery: 1,601 tons, 18.3 %
Hull, fittings & equipment: 3,150 tons, 36.0 %
Fuel, ammunition & stores: 1,845 tons, 21.1 %
Miscellaneous weights: 475 tons, 5.4 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
12,567 lbs / 5,700 Kg = 117.3 x 6.0 " / 152 mm shells or 1.9 torpedoes
Stability (Unstable if below 1.00): 1.15
Metacentric height 2.9 ft / 0.9 m
Roll period: 14.4 seconds
Steadiness - As gun platform (Average = 50 %): 57 %
- Recoil effect (Restricted arc if above 1.00): 0.26
Seaboat quality (Average = 1.00): 1.01
Hull form characteristics:
Hull has rise forward of midbreak
and transom stern
Block coefficient: 0.500
Length to Beam Ratio: 9.50 : 1
'Natural speed' for length: 27.06 kts
Power going to wave formation at top speed: 57 %
Trim (Max stability = 0, Max steadiness = 100): 57
Bow angle (Positive = bow angles forward): 30.00 degrees
Stern overhang: 3.28 ft / 1.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 31.17 ft / 9.50 m
- Forecastle (24 %): 21.33 ft / 6.50 m
- Mid (40 %): 21.33 ft / 6.50 m (13.12 ft / 4.00 m aft of break)
- Quarterdeck (22 %): 13.12 ft / 4.00 m
- Stern: 13.12 ft / 4.00 m
- Average freeboard: 17.35 ft / 5.29 m
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 80.5 %
- Above water (accommodation/working, high = better): 148.8 %
Waterplane Area: 22,695 Square feet or 2,108 Square metres
Displacement factor (Displacement / loading): 138 %
Structure weight / hull surface area: 93 lbs/sq ft or 452 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.99
- Longitudinal: 1.17
- Overall: 1.00
Hull space for machinery, storage, compartmentation is excellent
Room for accommodation and workspaces is excellent
50t RaA.6 Air Search radar
20t RaA.5 Air Search radar
20t RaS.4 Surface Search radar
30t 2 x GDR1R FC Systems
30t 6 x GDR5 FC Systems
40t Improved 152mm mountings (5t per gun)
50t Improved AA mountings
45t Enhanced Command Facilities
20t Recon Management and intelligence distribution equipment
75t Three Helicopters/Auto-gyros
50t Command, Control, and Support assets for Helicopters/Auto-gyros
25t Structural accommodations/reinforcement for hanger and landing deck.
15t Emergency Diesel
5t Construction Reserve