Rio de Janeiro
Recife
Brazilian Battlecruisers laid down 1930
Displacement:
23,609 t light; 24,734 t standard; 26,930 t normal; 28,687 t full load
Dimensions: Length overall / water x beam x draught
752.64 ft / 750.00 ft x 80.00 ft (Bulges 91.20 ft) x 26.50 ft (normal load)
229.40 m / 228.60 m x 24.38 m (Bulges 27.80 m) x 8.08 m
Armament:
6 - 12.01" / 305 mm guns (3x2 guns), 925.00lbs / 419.57kg shells, 1925 Model
Breech loading guns in turrets (on barbettes)
on centreline ends, majority forward, 1 raised mount - superfiring
15 - 4.72" / 120 mm guns (5x3 guns), 55.12lbs / 25.00kg shells, 1930 Model
Quick firing guns in turrets (on barbettes)
on side ends, majority aft, 1 raised mount - superfiring
24 - 3.00" / 76.2 mm guns (12x2 guns), 14.00lbs / 6.35kg shells, 1930 Model
Anti-aircraft guns in deck mounts with hoists
on side, evenly spread, 8 raised mounts - 2 superfiring
16 - 1.38" / 35.0 mm guns (8x2 guns), 1.32lbs / 0.60kg shells, 1930 Model
Anti-aircraft guns in deck mounts
on side, evenly spread, all raised mounts
8 - 0.54" / 13.7 mm guns (2x4 guns), 0.11lbs / 0.05kg shells, 1930 Model
Anti-aircraft guns in deck mounts
on centerline ends, evenly spread, all raised mounts
Weight of broadside 6,735 lbs / 3,055 kg
Shells per gun, main battery: 150
8 - 21.0" / 533.4 mm above water torpedoes
Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 8.27" / 210 mm 534.78 ft / 163.00 m 11.48 ft / 3.50 m
Ends: Unarmoured
Upper: 1.57" / 40 mm 534.78 ft / 163.00 m 13.12 ft / 4.00 m
Main Belt covers 110 % of normal length
- Torpedo Bulkhead and Bulges:
1.77" / 45 mm 534.78 ft / 163.00 m 23.29 ft / 7.10 m
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 8.27" / 210 mm 5.12" / 130 mm 8.27" / 210 mm
2nd: 2.95" / 75 mm 1.57" / 40 mm 2.95" / 75 mm
3rd: 1.18" / 30 mm - -
4th: 0.79" / 20 mm - -
5th: 0.59" / 15 mm - -
- Armour deck: 4.72" / 120 mm, Conning tower: 5.12" / 130 mm
Machinery:
Oil fired boilers, steam turbines,
Geared drive, 4 shafts, 142,500 shp / 106,305 Kw = 31.75 kts
Range 15,000nm at 12.00 kts (Bunkerage = 3,953 tons)
Complement:
1,050 - 1,366
Cost:
£8.763 million / $35.053 million
Distribution of weights at normal displacement:
Armament: 791 tons, 2.9 %
Armour: 8,381 tons, 31.1 %
- Belts: 2,552 tons, 9.5 %
- Torpedo bulkhead: 817 tons, 3.0 %
- Armament: 1,355 tons, 5.0 %
- Armour Deck: 3,559 tons, 13.2 %
- Conning Tower: 99 tons, 0.4 %
Machinery: 4,318 tons, 16.0 %
Hull, fittings & equipment: 9,918 tons, 36.8 %
Fuel, ammunition & stores: 3,321 tons, 12.3 %
Miscellaneous weights: 200 tons, 0.7 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
26,435 lbs / 11,991 Kg = 30.5 x 12.0 " / 305 mm shells or 3.7 torpedoes
Stability (Unstable if below 1.00): 1.14
Metacentric height 4.6 ft / 1.4 m
Roll period: 17.9 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0.44
Seaboat quality (Average = 1.00): 1.13
Hull form characteristics:
Hull has a flush deck
Block coefficient: 0.520
Length to Beam Ratio: 8.22 : 1
'Natural speed' for length: 27.39 kts
Power going to wave formation at top speed: 53 %
Trim (Max stability = 0, Max steadiness = 100): 62
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: 30.12 ft / 9.18 m
- Forecastle (20 %): 22.00 ft / 6.71 m
- Mid (50 %): 21.00 ft / 6.40 m
- Quarterdeck (15 %): 21.00 ft / 6.40 m
- Stern: 21.00 ft / 6.40 m
- Average freeboard: 22.00 ft / 6.71 m
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 101.9 %
- Above water (accommodation/working, high = better): 142.4 %
Waterplane Area: 40,718 Square feet or 3,783 Square metres
Displacement factor (Displacement / loading): 114 %
Structure weight / hull surface area: 155 lbs/sq ft or 758 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.99
- Longitudinal: 1.10
- Overall: 1.00
Hull space for machinery, storage, compartmentation is adequate
Room for accommodation and workspaces is excellent
Ship has slow, easy roll, a good, steady gun platform