WesWorld

Active Battleships of the Marinha Imperial

Imperial, Brazil Battleship laid down 1913

Displacement:
26,238 t light; 28,111 t standard; 29,861 t normal; 31,261 t full load

Dimensions: Length overall / water x beam x draught
624.50 ft / 624.50 ft x 88.50 ft x 30.50 ft (normal load)
190.35 m / 190.35 m x 26.97 m x 9.30 m

Armament:
8 - 15.00" / 381 mm guns (4x2 guns), 1,687.50lbs / 765.44kg shells, 1912 Model
Breech loading guns in turrets (on barbettes)
on centreline ends, evenly spread, 2 raised mounts - superfiring
14 - 6.00" / 152 mm guns in single mounts, 108.00lbs / 48.99kg shells, 1913 Model
Breech loading guns in casemate mounts
on side, all forward
14 guns in hull casemates - Limited use in heavy seas
2 - 2.99" / 76.0 mm guns in single mounts, 13.39lbs / 6.08kg shells, 1913 Model
Quick firing guns in deck mounts
on side, evenly spread
Weight of broadside 15,039 lbs / 6,821 kg
Shells per gun, main battery: 150
4 - 21.0" / 533.4 mm submerged torpedo tubes

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 13.0" / 330 mm 420.00 ft / 128.02 m 12.00 ft / 3.66 m
Ends: 6.00" / 152 mm 204.00 ft / 62.18 m 12.00 ft / 3.66 m
Upper: 6.00" / 152 mm 310.00 ft / 94.49 m 8.00 ft / 2.44 m
Main Belt covers 103 % of normal length

- Torpedo Bulkhead:
2.00" / 51 mm 510.00 ft / 155.45 m 28.00 ft / 8.53 m

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 13.0" / 330 mm 8.00" / 203 mm 8.00" / 203 mm
2nd: 6.00" / 152 mm - -
3rd: 1.00" / 25 mm - -

- Armour deck: 3.00" / 76 mm

Machinery:
Coal and oil fired boilers, steam turbines,
Geared drive, 4 shafts, 48,126 shp / 35,902 Kw = 23.00 kts
Range 6,100nm at 13.00 kts
Bunker at max displacement = 3,150 tons (25% coal)

Complement:
1,135 - 1,476

Cost:
£3.019 million / $12.077 million

Distribution of weights at normal displacement:
Armament: 1,880 tons, 6.3 %
Armour: 10,113 tons, 33.9 %
- Belts: 4,048 tons, 13.6 %
- Torpedo bulkhead: 1,057 tons, 3.5 %
- Armament: 2,723 tons, 9.1 %
- Armour Deck: 2,286 tons, 7.7 %
- Conning Tower: 0 tons, 0.0 %
Machinery: 1,930 tons, 6.5 %
Hull, fittings & equipment: 12,165 tons, 40.7 %
Fuel, ammunition & stores: 3,622 tons, 12.1 %
Miscellaneous weights: 150 tons, 0.5 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
43,149 lbs / 19,572 Kg = 25.6 x 15.0 " / 381 mm shells or 6.4 torpedoes
Stability (Unstable if below 1.00): 1.16
Metacentric height 5.5 ft / 1.7 m
Roll period: 15.9 seconds
Steadiness - As gun platform (Average = 50 %): 43 %
- Recoil effect (Restricted arc if above 1.00): 0.94
Seaboat quality (Average = 1.00): 1.26

Hull form characteristics:
Hull has low quarterdeck
Block coefficient: 0.620
Length to Beam Ratio: 7.06 : 1
'Natural speed' for length: 24.99 kts
Power going to wave formation at top speed: 46 %
Trim (Max stability = 0, Max steadiness = 100): 30
Bow angle (Positive = bow angles forward): 0.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 26.00 ft / 7.92 m
- Forecastle (20 %): 25.00 ft / 7.62 m
- Mid (50 %): 24.00 ft / 7.32 m
- Quarterdeck (30 %): 16.00 ft / 4.88 m (24.00 ft / 7.32 m before break)
- Stern: 16.00 ft / 4.88 m
- Average freeboard: 22.03 ft / 6.71 m
Ship tends to be wet forward

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 94.2 %
- Above water (accommodation/working, high = better): 167.9 %
Waterplane Area: 41,182 Square feet or 3,826 Square metres
Displacement factor (Displacement / loading): 102 %
Structure weight / hull surface area: 201 lbs/sq ft or 983 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 1.01
- Longitudinal: 1.77
- Overall: 1.07
Hull space for machinery, storage, compartmentation is adequate
Room for accommodation and workspaces is excellent
Good seaboat, rides out heavy weather easily

As simmed by TheCanadian