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Complementing the 16-in/50 caliber Mark 7 gun was a fire control computer, the Ford Instrument Company Mark 8 Range Keeper. This analog computer was used to direct the fire from the battleship's big guns, taking into account factors including the speed of the targeted ship, the projectile's travel time, and air resistance.
The first Iowa-class ship was laid down in June 1940; in their World War II configuration, each of the Iowa-class battleships had a main battery of 16-inch (406 mm) guns that could hit targets nearly 20 statute miles (32 km) away with a variety of artillery shells designed for anti-ship or bombardment work. The secondary battery of 5-inch (127 ...
Cutaway diagram of a 16-inch gun loaded with a projectile and six powder bags. The rammer arm is still extended into the breech. Another group of Sandia investigators, directed by Paul Cooper, conducted 450 drop tests using small bags of D-846 powder in late March to early May 1990.
The U.S. Navy had the 16"/50-caliber Mark 2 guns left over from the canceled Lexington-class battlecruisers and South Dakota-class battleships of the early 1920s. However it was already apparent that the Mark 2 was too heavy to arm the North Carolina and new South Dakota (1939) battleship classes which had to adhere to the 35,000 ton standard displacement set by the Second London Naval Treaty.
The deck armor consists of a 1.5-inch-thick (38 mm) STS weather deck, a combined 6-inch-thick (152 mm) Class B and STS main armor deck, and a 0.63-inch-thick (16 mm) STS splinter deck. Over the magazines, the splinter deck is replaced by a 1-inch (25 mm) STS third deck that separates the magazine from the main armored deck. [72]
The deck armor would be in three layers: the first consisting of 0.75 in (19 mm) STS laminated on 1.5 in (38 mm) STS for a total of 2.25 in (57 mm) STS weather deck, the second consisting of 5.8 in (147 mm) Class B laminated on 1.25 in (32 mm) STS for a total of 7.05 in (179 mm), and a third 0.625 in (16 mm) splinter deck.
USS Iowa (BB-61) is a retired battleship, the lead ship of her class, and the fourth in the United States Navy to be named after the state of Iowa.Owing to the cancellation of the Montana-class battleships, Iowa is the last lead ship of any class of United States battleships and was the only ship of her class to serve in the Atlantic Ocean during World War II.
The ship had a stowage capacity of 1,600 t (1,600 long tons) of coal and 3,400 t (3,300 long tons) of fuel oil, [2] giving her a range of 5,500 nautical miles (10,200 km; 6,300 mi) at a speed of 16 knots (30 km/h; 18 mph). The ship exceeded her designed speed of 26.5 knots (49.1 km/h; 30.5 mph) during her sea trials, reaching 26.7 knots (49.4 ...