BNS Pernambuco (BC-1927)


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The conversion of the old Bellerophon class battleship to aircraft handling duties gave the Brazilian Navy 5 twin 12" turrets with which a new ship could be designed around. Discussion centered on where the 5th turret should be mounted, C, Q, or Z, positions. The Navy designers discounted the Q position from the start leaving C and Z. The C position was toyed with, with many designs showing the differing ways the turrets could be mounted.

The position the Brazilians would have most liked to use was Fore / Config. 03. This would allow all of the guns to fire forward which with a fast battlecruiser would be ideal. But to enable this design would have required an extra long forecastle to allow for the extra weight forward and to stop the bow from plunging from the weight. A typical British hull with a step down deck aft would allow Aft / Config 01. to be used without the problems associated with the other configurations.

Built as a greyhound at 768x88 feet with a large propulsion system to reach 34 knots. The 34 knot speed was to enable the ship to be able to intercept the Argetinian cruisers and minelayers (ex Bremse class) which were faster than the ships currently in the Brazilian Navy. With a secondary armament of 5.5" and 4" AA guns, the ship lasted in this condition for ten years before being sent for refurbishment with a new dual purpose secondary armament and other changes to improve the fire control systems.

Displacement 27,500 tons std 31,750 tons full load
Length 768 ft
Breadth 88 ft
Draught 30 ft
Machinery 4 shaft steam turbines, 150,000shp
Speed 34 knots
Range 8500 miles at 16 knots
Armour 8" side, 4.5" deck, 11" turrets
Armament 10x 12" (5x2)

24 x 4.5" (12x2)

40 x 2pd (5x8)

18 x 20mm (18x1)

Aircraft (3 removed 1937)
Torpedoes nil
Complement 1350


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