Design
Pensacola-class
In March 1921 received the General Board five designs for a 10.000 tons scout cruiser, although none was ever realized. The preliminary designs however did influenced the designing process of the Pensacola-class built under the Fiscal Year 1926.
Dimensions 560’ (waterline) x 52.0’ (waterline) x 18.75’ and a displacement of 8.250 tons. The reduced gear turbine machinery and 12 boilers divided over 4 rooms supplied 44.000 bhp allowing a speed of 33 knots (standard series) and with a speed of 10 knots a range of 8.000 nautical miles. Freeboard maximum at stem 28’and at A.P. 13’. Metacenter above base 22.80, C. of. G. above base 18.75 and G.M. 4.05’.Coefficients at normal displacement of 8.250 tons, longitudinal .58, midship .911 and displacement-length 47.02. Normal displacement 8.250 tons: hull (no protection) 3.564 tons, hull fitting 405 tons, protection 585 tons, steam engineering 1.500 tons, reserve feed 2/3 92 tons, battery 320 tons, ammunition 225 tons, equipment 189 tons, outfit and 2/3 stores 247 tons, fuel oil, 2/3 full supply 800 tons and margin 323 tons. The armament consisted of 3x2-8” guns, 4-5” short anti aircraft guns and 2x2-21”Dk. Torpedo tubes. The barbettes were not protected. A protective deck with a total thickness of 1”and a splinter deck over the magazines with a thickness of 1,5”.
Source
The so-called Spring Styles Book 1 (March 1911-September 1925). Naval History and Heritage Command. Lot S-584-176. Preliminary designs prepared by mostly civilians working at the Bureau of Construction and Repair (succeeded by the Bureau of Ships nowadays the Naval Sea Systems Command) under supervision of naval architects of the Navy Construction Corps. A major part of the drawings was presented to the General Board which advices the Secretary of the Navy.
