MM Sardegna was laid down but cancelled before any work was done on the hull. Seems that the order for the 15"/50 guns was only cut to 2 instead of been dropped to 0. They would seem to be useful for future developments...
A springstyle report "liberated" at the same time;
F38-02/1921
Displacement:
34,305 t light; 36,425 t standard; 39,355 t normal; 41,541 t full load
Loading submergence 1,486 tons/feet
Dimensions:
720.00 ft x 106.00 ft x 32.00 ft (normal load)
219.46 m x 32.31 m x 9.75 m
Armament:
9 - 15.00" / 381 mm guns (3 Main turrets x 3 guns, 1 superfiring turret)
Main turrets are grouped together
12 - 5.12" / 130 mm guns (6 2nd turrets x 2 guns)
16 - 0.79" / 20 mm AA guns
Weight of broadside 15,996 lbs / 7,256 kg
Armour:
Belt 14.96" / 380 mm, ends unarmoured
Belts cover 90 % of normal area
Main turrets 15.75" / 400 mm, 2nd turrets 1.97" / 50 mm
Armour deck 5.91" / 150 mm, Conning tower 2.95" / 75 mm
Torpedo bulkhead 1.18" / 30 mm
Machinery:
Oil fired boilers, steam turbines,
Geared drive, 4 shafts, 115,683 shp / 86,300 Kw = 28.00 kts
Range 9,000nm at 15.00 kts
Complement:
1,397 - 1,816
Cost:
£8.751 million / $35.005 million
Distribution of weights at normal displacement:
Armament: 1,999 tons, 5.1 %
Armour: 13,666 tons, 34.7 %
Belts: 3,337 tons, 8.5 %, Armament: 3,920 tons, 10.0 %, Armour Deck: 5,681 tons, 14.4 %
Conning Tower: 74 tons, 0.2 %, Torpedo bulkhead: 654 tons, 1.7 %
Machinery: 3,984 tons, 10.1 %
Hull, fittings & equipment: 14,606 tons, 37.1 %
Fuel, ammunition & stores: 5,050 tons, 12.8 %
Miscellaneous weights: 50 tons, 0.1 %
Metacentric height 6.0
Remarks:
Hull space for machinery, storage & compartmentation is adequate
Room for accommodation & workspaces is excellent
Estimated overall survivability and seakeeping ability:
Relative margin of stability: 1.05
Shellfire needed to sink: 39,320 lbs / 17,835 Kg = 23.3 x 15.0 " / 381 mm shells
(Approx weight of penetrating shell hits needed to sink ship excluding critical hits)
Torpedoes needed to sink: 5.4
(Approx number of typical torpedo hits needed to sink ship)
Relative steadiness as gun platform: 64 %
(Average = 50 %)
Relative rocking effect from firing to beam: 0.52
Relative quality as seaboat: 1.07
Hull form characteristics:
Block coefficient: 0.564
Sharpness coefficient: 0.40
Hull speed coefficient 'M': 6.48
'Natural speed' for length: 26.83 kts
Power going to wave formation at top speed: 52 %
Trim: 60
(Maximise stabilty/flotation = 0, Maximise steadiness/seakeeping = 100)
Estimated hull characteristics & strength:
Underwater volume absorbed by magazines and engineering spaces: 89.7 %
Relative accommodation and working space: 141.8 %
(Average = 100%)
Displacement factor: 104 %
(Displacement relative to loading factors)
Relative cross-sectional hull strength: 0.96
(Structure weight / hull surface area: 201 lbs / square foot or 980 Kg / square metre)
Relative longitudinal hull strength: 1.33
(for 20.00 ft / 6.10 m average freeboard, freeboard adjustment 0.08 ft)
Relative composite hull strength: 1.00
And yes, those poor, poor Italian people.