American battle cruiser design No. 143 dated 1 July 1915

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Requested by the General Board probably to get an impresssion of the cruiser of the future. Never built, lacked any side armour protection. If the machinery available for scouts (10ehp/ton) was satisfactory could a side armour belt of 3.75 be added in way of machinery and magazines. Dimensions 725 (waterline) x 90.0 (waterline) x 30.6 feet. Block Coefficient .527. Longitudinal coefficient .538. Speed 30 knots. Range 10 knots/8,000 nautical miles. Horsepower 41,900 ehp at 30 knots. Turbine propulsion. Number of boiler rooms 7. Armament 3x2-16”B.L.R. guns, 14-15.4cm/6” guns, 4-7.62cm/3” anti aircraft guns and 4-53.34cm/21” torpedo tubes. Heavy part of barbettes protected by 14” armour, gun turrets 16” (port)10 (sides)-5” (top)-9 ” (rear), heavy parts of conning tower 16”and protective deck in way of machinery and magazines only 5”/

Normal displacement 30,00 tons

Hull complete with fittings 14,737

Protection 3,327

Steam engineering 6,210

Reserve feed 2/3 supply 655

Battery 1,275

Ammunition and 2/3 ordnance stores 1,076

Equipment and 2/3 equipment stores 500

Outfit and 2/3 stores 710

Oil fuel 23 full supply 1,510

Source

U.S. Naval History and Heritage Command 1911-1925 Spring Styles Book. S-584-081.