Tuesday, 28 March 2017

Preliminary design for an US Navy light cruiser dated 23 June 1915

Drawn as a result of an oral request of the General Board on 12 June 1915 to become familiar with the qualities of much smaller cruisers than the studied scout cruiser at that moment. The design is never realized.

Normal displacement of 4.000 tons and as dimensions 450’0” (waterline) x 42’0”(waterline) x 13’0”. Block coefficient 57- and longitudinal coefficient 634. Displacement of 4.000 tons: 1.614 tons hull complete and fittings,  protection 288 tons, steam engineering 1.025 tons, reserve feed 2/3 supply 273 tons, battery 71 tons, ammunition and 2.3 ordnance stores 100 tons, equipment and 2/3 equipment stores 100 tons, out fit and 2/3 stores 140 tons and oil fuel 2.3 full supply 389 tons. The turbine machinery and 3 boiler rooms allowed with 20.500 ehp a speed of 30 knots. With a speed of 20 knots was the range 2.500 nautical miles. The armament consisted of 2-6” quick firing guns, 6-3” quick firing guns, 2-3“ anti aircraft guns and 2-21“ torpedo tubes on deck.. The armour consisted of a main side belt with a extreme width o 10’0“, a depth below the waterline of 5’0” and a thickness of 3”. The conning tower  proper was protected by 3” and the top by 5” thick armour.

Naval History and Heritage Command Spring Styles Book 1911-1925 drawing S 584-080.