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 600’ (waterline) x 55.0’ (waterline) x 20.0’ and a displacement of 10.000 tons. The reduced gear turbine machinery and 12 boilers divided over 5 rooms supplied 59.000 bhp allowing a speed of 34,5 knots (standard series) and with a speed of 10 knots a range of 8.000 nautical miles. Freeboard maximum at stem 20’and at A.P. 14’. Total depth at M.P. measured at of uppermost strength Dk. 35’. Metacenter above base 24.15, C. of. G. above base 19.90 and G.M. 4.25’.Coefficients at normal displacement of 10.000 tons, longitudinal .58, midship .914 and displacement-length 46.2. Normal displacement 10.000 tons: hull (no protection) 4.241 tons, hull fitting 492 tons, protection 591 tons, steam engineering 2.010 tons, reserve feed 2/3 123 tons, battery 400 tons, ammunition 270 tons, equipment 229 tons, outfit and 2/3 stores 300 tons, fuel oil, 2/3 full supply 910 tons and margin 434 tons. The armament consisted of 4x2-8” 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-584-177. 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.
