Imperial, Brazil (Vickers Export Design) Aircraft Carrier laid down 1947
Displacement:
16,200 t light; 16,713 t standard; 19,052 t normal; 20,923 t full load
Dimensions: Length overall / water x beam x draught
705.26 ft / 688.98 ft x 95.96 ft x 18.47 ft (normal load)
214.96 m / 210.00 m x 29.25 m x 5.63 m
Armament:
8 - 4.70" / 119 mm guns (4x2 guns), 52.91lbs / 24.00kg shells, 1947 Model
Automatic rapid fire guns in deck mounts with hoists
on side, all forward, all raised mounts - superfiring
16 - 1.46" / 37.0 mm guns (8x2 guns), 1.55lbs / 0.70kg shells, 1947 Model
Anti-aircraft guns in deck mounts
on side ends, evenly spread, all raised mounts - superfiring
16 - 0.79" / 20.0 mm guns (8x2 guns), 0.24lbs / 0.11kg shells, 1947 Model
Anti-aircraft guns in deck mounts
on side, all amidships, all raised mounts - superfiring
Weight of broadside 452 lbs / 205 kg
Shells per gun, main battery: 500
Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 2.95" / 75 mm 211.61 ft / 64.50 m 9.02 ft / 2.75 m
Ends: Unarmoured
Main Belt covers 47 % of normal length
Main belt does not fully cover magazines and engineering spaces
- Torpedo Bulkhead:
0.98" / 25 mm 524.93 ft / 160.00 m 16.99 ft / 5.18 m
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 0.98" / 25 mm 0.59" / 15 mm 0.98" / 25 mm
2nd: 0.59" / 15 mm 0.20" / 5 mm -
3rd: 0.59" / 15 mm 0.20" / 5 mm -
- Armour deck: 1.97" / 50 mm
Machinery:
Oil fired boilers, steam turbines,
Geared drive, 2 shafts, 115,000 shp / 85,790 Kw = 31.05 kts
Range 12,000nm at 16.00 kts
Bunker at max displacement = 4,210 tons
Complement:
810 - 1,054
Cost:
£7.419 million / $29.675 million
Distribution of weights at normal displacement:
Armament: 66 tons, 0.3 %
Armour: 2,319 tons, 12.2 %
- Belts: 295 tons, 1.5 %
- Torpedo bulkhead: 325 tons, 1.7 %
- Armament: 26 tons, 0.1 %
- Armour Deck: 1,674 tons, 8.8 %
- Conning Tower: 0 tons, 0.0 %
Machinery: 2,841 tons, 14.9 %
Hull, fittings & equipment: 6,724 tons, 35.3 %
Fuel, ammunition & stores: 2,852 tons, 15.0 %
Miscellaneous weights: 4,250 tons, 22.3 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
33,540 lbs / 15,214 Kg = 646.1 x 4.7 " / 119 mm shells or 5.3 torpedoes
Stability (Unstable if below 1.00): 1.22
Metacentric height 6.8 ft / 2.1 m
Roll period: 15.5 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0.03
Seaboat quality (Average = 1.00): 1.12
Hull form characteristics:
Hull has raised forecastle
Block coefficient: 0.546
Length to Beam Ratio: 7.18 : 1
'Natural speed' for length: 26.25 kts
Power going to wave formation at top speed: 54 %
Trim (Max stability = 0, Max steadiness = 100): 62
Bow angle (Positive = bow angles forward): 20.00 degrees
Stern overhang: 5.00 ft / 1.52 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 31.00 ft / 9.45 m
- Forecastle (25 %): 31.00 ft / 9.45 m (21.00 ft / 6.40 m aft of break)
- 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: 23.50 ft / 7.16 m
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 96.7 %
- Above water (accommodation/working, high = better): 227.0 %
Waterplane Area: 45,970 Square feet or 4,271 Square metres
Displacement factor (Displacement / loading): 149 %
Structure weight / hull surface area: 111 lbs/sq ft or 540 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
Class Names: HMS Albion, Centaur
Belt is box armour around magazines
Hangar deck: 545 x 65 x 17.5ft
Served by two 55 x 44ft lifts with capacity for 30,000lbs
Two hydralic accelerators with capacity for 30,000lbs aircraft
Arrestor gear of 9 wires, 1 trickle wire, 2 forward wires and two safety barriers
48 aircraft usually carried (4x 12 aircraft squadrons)
6 crated spare aircraft carried for attrition replacement
Electric Equipment:
One Aerial Search RDF set
One Surface Search RDF set
Four Gunnery RDF sets
VHF Direction Finder/ Homing Beacon
MIBN Imperial: planned completion Q1/1949