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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.
An improved weapon, the BL 16-inch Mark II was designed for the Lion-class battleship which was a successor to the King George V class taking advantage of the larger weapon allowed under the London Naval Treaty from March 1938. This "new design" of 16-inch gun fired a shell that weighed 2,375 pounds (1,077 kg).
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 ...
406 mm (16.0 in) BL 16 inch Mk I naval gun United Kingdom: World War II 406 mm (16.0 in) 16"/45 caliber Mark 1, 5 & 8 gun United States: 1920s - World War II 406 mm (16.0 in) 16"/45 caliber Mark 6 gun United States: World War II 406 mm (16.0 in) 16"/50 caliber Mark 7 gun United States: World War II - Cold War 406 mm (16.0 in)
The first US Navy 16-inch gun was the 16-inch/45 caliber Mark 1 gun, which armed the Colorado-class battleships launched 1920–21. [ 5 ] [ 6 ] The second Navy design, the Mark 2, was intended as armament for the planned South Dakota -class battleships , and also selected for the modified design of the Lexington -class battlecruisers ...
As 16-inch guns and a companion improved 6-inch gun were emplaced, older weapons were scrapped. About 21 16-inch gun batteries were completed 1941-44, but not all of these were armed. [17] With the war over in 1945, most of the remaining coast defense guns, including the recently emplaced 16-inch weapons, were scrapped by 1948.
This was a paper case about 16 inch (406 mm) long filled with slow-burning composition which burnt rather more than one inch (25 mm) per minute. Later again the charge was exploded by paper tubes (sometimes called Dutch tubes ) filled with powder and placed in the vent and ignited by a port-fire.
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.