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Monday 8 February 2016

Preliminary design for the American battleship No. 40 [New Mexico] dated 4 October 1913



Drawing S 584-33 made by the Bureau of Construction and repair for a battleship to be built under fiscal year 1915. One of the five preliminary designs made for the New Mexico-class battleships (1) and sent to the Executive Committee of the Navy’s General Board on 10 October 1913.

Normal displacement 35.500 ton: hull complete 14.928 ton, hull fittings 1.560 ton, protection 10.458 ton, steam engineering 2.550 ton, reserve feed 2/3 supply 223 ton, battery 1.117 ton, ammunition& 2/3 ordnance stores 1.024 ton, equipment&2/3 equipment stores and outfir&2/3 stores 1.155 ton, oil fuel supply 1.651 ton and margin 834 ton. Dimensions 650’ x 95.5’ (outside of plating) x 30.0’. Block coefficient 0.667, longitudinal coefficient 0.681 and midship section coefficient 0.980. Armament consisted of 3x2-16” breech loading guns, 22-5” guns and 4 submerged torpedo tubes. The machinery consisted of turbines and 12 boilers divided over 3 room supplying 38.000 shp allowing a speed of 21 knots and with a speed of 10 knots a range of 8.000 nautical miles. The armour consisted of a main side belt with an extreme width of 17’4 5/8”, depth below waterline 8’6” and thickness of 19” + 11-19”, barbettes protected by 6¼”(light parts)-18” (heavy parts), turrets 7” (roof)-12½ (rear)-12½/14” (sides)-25” (port), conning tower proper and fire control tower by 19”, conning tower tube 6” (light)-19” (heavy), uptake protection 16”, protective deck total 170≠ and splinter deck total thickness 80≠+60≠. Note 1” increase in protective deck increases weight with 740 tons.

Note
1.The New Mexico (BB-40) was laid down at the New York Navy Yard on 14 October 1915, launched on 13 April 1917 and commissioned on 20 May 1918.

Source the so-called Spring Styles Book 1 (March 1911-September 1925). Naval History and Heritage Command. Lot S-584. 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 is presented to the General Board which adviced the Secretary of the Navy.