RM Principe Eugenio di Savoia, Italian Battleship laid down 1928
Displacement:
38,787 t light; 40,947 t standard; 47,192 t normal; 52,188 t full load
Dimensions: Length overall / water x beam x draught
807.35 ft / 787.40 ft x 104.99 ft x 34.45 ft (normal load)
246.08 m / 240.00 m x 32.00 m x 10.50 m
Armament:
9 - 15.00" / 381 mm guns (3x3 guns), 1,951.09lbs / 885.00kg shells, 1928 Model
Breech loading guns in turrets (on barbettes)
on centreline ends, majority forward, 1 raised mount - superfiring
18 - 5.12" / 130 mm guns (6x3 guns), 70.55lbs / 32.00kg shells, 1928 Model
Breech loading guns in deck mounts with hoists
on side ends, evenly spread, 2 raised mounts - superfiring
16 - 3.94" / 100 mm guns (8x2 guns), 33.07lbs / 15.00kg shells, 1928 Model
Anti-aircraft guns in deck mounts with hoists
on side, all amidships, 4 raised mounts - superfiring
18 - 1.85" / 47.0 mm guns (6x3 guns), 3.86lbs / 1.75kg shells, 1928 Model
Anti-aircraft guns in deck mounts
on side, all amidships, all raised mounts - superfiring
16 - 1.46" / 37.0 mm guns (4x4 guns), 1.55lbs / 0.70kg shells, 1928 Model
Anti-aircraft guns in deck mounts
on side ends, evenly spread
Weight of broadside 19,453 lbs / 8,824 kg
Shells per gun, main battery: 110
Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 14.6" / 370 mm 439.63 ft / 134.00 m 13.12 ft / 4.00 m
Ends: Unarmoured
Upper: 2.76" / 70 mm 439.63 ft / 134.00 m 8.20 ft / 2.50 m
Main Belt covers 86 % of normal length
- Torpedo Bulkhead:
1.57" / 40 mm 439.63 ft / 134.00 m 34.45 ft / 10.50 m
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 16.0" / 406 mm 9.84" / 250 mm 13.0" / 330 mm
2nd: 2.76" / 70 mm 1.97" / 50 mm -
3rd: 1.18" / 30 mm 0.79" / 20 mm -
4th: 0.39" / 10 mm - -
5th: 0.39" / 10 mm - -
- Armour deck: 5.54" / 141 mm, Conning tower: 2.76" / 70 mm
Machinery:
Oil fired boilers, steam turbines,
Geared drive, 4 shafts, 160,000 shp / 119,360 Kw = 29.85 kts
Range 6,000nm at 24.00 kts
Bunker at max displacement = 11,241 tons
Complement:
1,600 - 2,081
Cost:
£14.647 million / $58.589 million
Distribution of weights at normal displacement:
Armament: 2,121 tons, 4.5 %
Armour: 14,423 tons, 30.6 %
- Belts: 4,165 tons, 8.8 %
- Torpedo bulkhead: 882 tons, 1.9 %
- Armament: 3,214 tons, 6.8 %
- Armour Deck: 6,083 tons, 12.9 %
- Conning Tower: 78 tons, 0.2 %
Machinery: 4,981 tons, 10.6 %
Hull, fittings & equipment: 17,163 tons, 36.4 %
Fuel, ammunition & stores: 8,404 tons, 17.8 %
Miscellaneous weights: 100 tons, 0.2 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
66,155 lbs / 30,007 Kg = 39.2 x 15.0 " / 381 mm shells or 9.3 torpedoes
Stability (Unstable if below 1.00): 1.17
Metacentric height 7.2 ft / 2.2 m
Roll period: 16.4 seconds
Steadiness - As gun platform (Average = 50 %): 51 %
- Recoil effect (Restricted arc if above 1.00): 0.62
Seaboat quality (Average = 1.00): 1.02
Hull form characteristics:
Hull has low quarterdeck
Block coefficient: 0.580
Length to Beam Ratio: 7.50 : 1
'Natural speed' for length: 28.06 kts
Power going to wave formation at top speed: 52 %
Trim (Max stability = 0, Max steadiness = 100): 50
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: 28.87 ft / 8.80 m
- Forecastle (20 %): 22.31 ft / 6.80 m
- Mid (50 %): 22.31 ft / 6.80 m
- Quarterdeck (20 %): 12.47 ft / 3.80 m (22.31 ft / 6.80 m before break)
- Stern: 12.47 ft / 3.80 m
- Average freeboard: 20.87 ft / 6.36 m
Ship tends to be wet forward
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 85.7 %
- Above water (accommodation/working, high = better): 157.6 %
Waterplane Area: 59,339 Square feet or 5,513 Square metres
Displacement factor (Displacement / loading): 114 %
Structure weight / hull surface area: 206 lbs/sq ft or 1,008 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.97
- Longitudinal: 1.24
- Overall: 1.00
Hull space for machinery, storage, compartmentation is adequate
Room for accommodation and workspaces is excellent
Main belt is 300mm thick inclined at 15º with 70mm decapping plate
Deck armour;
25mm deck armour forward
25mm burster deck over citadel
130mm over machinery
150mm over magazines
150mm over steering gear
=140.75mm average thickness