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 625’ (waterline) x 57.0’ (waterline) x 20.75’ and a displacement of 11.250 tons. The reduced gear turbine machinery and 12 boilers divided over 5 rooms supplied 61.000 bhp allowing a speed of 34,5 knots (standard series) and with a freeboard maximum at stem 20’and at A.P. 14’. Total depth at M.P. measured at of uppermost strength Dk. 36’. Metacenter above base 24.10, C. of. G. above base 20.05 and G.M. 4.05’.Coefficients at normal displacement of 11.250 tons, longitudinal .58, midship .919 and displacement-length 46.1. Normal displacement 11.250 tons: hull (no protection) 4.525 tons, hull fitting 553 tons, protection 1,4325 tons, steam engineering 2.075 tons, reserve feed 2/3 127 tons, battery 320 tons, ammunition 225 tons, equipment 258 tons, outfit and 2/3 stores 338 tons, fuel oil, 2/3 full supply 984 tons and margin 406 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 3”and a splinter deck over the magazines with a thickness of 3”.
Source
The so-called Spring Styles Book 1 (March 1911-September 1925). Naval History and Heritage Command. Lot S-584-178. 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.
