Like all of the signatories to the Washington treaty, the Incan Empire built cruisers right up to and beyond the 10,000 ton limit. Eight inch guns were the maximum allowed and that was what the Incan designers allowed for. A new triple turret was also designed for the new guns and three were fitted, two forward and one aft. The armouring was modest with a 3" belt and 1.5" deck. The most armour was fitted around the propulsion and magazines where 3.5" armour was placed.
Statistics for the class of six was:
Displacement: 10,740 tons standard, 14,150 full load.
Dimensions: 608 x 66 x 26 feet
Machinery: 4 shaft, steam turbines, 78,000shp
Speed: 32 knots
Endurance: 8400 miles at 15 knots
Armour: 3" belt, 1.5" deck, 3.5" turrets
Armament:
9 x 8" (3x3)
6 x 100mm (6x1)
6 x 37mm (6x1)
Torpedoes: 12 x 21" (4x3)
Aircraft: 2
Crew: 630
