14"/45 caliber gun
|14"/45 caliber gun|
Crewmen aboard USS Texas pause to have their picture taken on top of one of the dual 14"/45 caliber gun turrets, 1918.
|Place of origin||United States|
|Used by||US Navy|
|Wars||World War II|
|Weight||124,000 pounds (56,000 kg)|
|Length||642.5 inches (16.32 m)|
|Barrel length||630 inches (16 m) bore (45 calibers)|
|Caliber||14-inch (360 mm)|
|Recoil||40-inch (100 cm)|
|Elevation||-5 to 30 degrees|
|Traverse||-150 to 150 degrees|
|Rate of fire||1.75 rpm|
|Muzzle velocity||AP - 2,600 feet per second (790 m/s), HC - 2,735 feet per second (834 m/s)|
|Maximum range||36,000 yards (33,000 m)|
The 14"/45 caliber gun, known initially as the Mark 1, 2, 3, and 5, and later as the Mark 8, 9, 10, and 12, were the first 14-inch guns to be employed with the United States Navy. They were installed aboard the United States Navy's New York, Nevada, and Pennsylvania-class battleships as the primary armament for each battleship in the class.
The design of the 14"/45 caliber dates to about 1910, and they entered service in 1914 aboard USS New York (BB-34). At the time of their introduction they were intended to fire 1400 lb armor-piercing (AP) projectiles containing a bursting charge of explosive D. Propellant charge was four silk bags of smokeless powder, each of which weighed 105 lb. At a 15 degree angle, the guns could fire a shell out to 23,000 yards. Each individual gun weighed 140,670 lbs without the breech and measured 642.5 inches in length.
Each of the original Mark 1 built-up guns consisted of a tube without liner, jacket, eight hoops and a screw box liner. To compensate for the problem of gun drooping, four hoop-locking rings were added to the guns. The Mark 3 added three hoop locking rings and contained a longer slide, while the Mark 5 had five hoops total. Owing to the interchangeability of the guns, the battleships fitted with the 14"/45 caliber guns often had guns of various Marks installed on each turret.
In the 1930s, the Mark 1, 2, 3, and 5 were upgraded to allow for increased charges and muzzle velocities, resulting in the Mark 8, 9, 10, and 12, respectively. All guns employed a Welin breech block and used a Smith-Asbury mechanism, and in the case of the Mark 12 a chromium plating was introduce to prolong barrel life. These improvements enabled the guns to fire heavier 1500 lb shells, and increasing the gun mount elevation to 30 degrees extended the range of the guns to 36,000 yards.
The guns on the two ships of the New York class (New York and Texas), the first ship of the Nevada class (Nevada) and the first ship of the Pennsylvania class (Pennsylvania) saw service in World War II in the role of shore bombardment. New York bombarded North Africa during landings in 1942, Pennsylvania took part in the Aleutian Campaign and Texas and Nevada shelled Normandy during Operation Overlord in 1944. Throughout 1944 and 1945, Pennsylvania hit many different Pacific islands during their invasions, while New York, Texas and Nevada all took part in the invasion of Iwo Jima and the invasion of Okinawa in 1945.
Due to the attack on Pearl Harbor, both Oklahoma and Arizona never fired their main batteries in anger. However, the 14"/45 caliber guns salvaged from the number 2 turret aboard Arizona were removed and installed aboard Nevada in the fall of 1944. The aft turrets from Arizona (numbers 3 and 4) were moved to become United States Army Coast Artillery Corps Battery Arizona on the west coast of Oahu and Battery Pennsylvania on Mokapu Point.
United Kingdom service
Eight US-Navy standard 14-inch 45 caliber guns, complete with mountings, built by Bethlehem Steel, were supplied to the United Kingdom in World War I. They were mounted on Abercrombie class monitors under UK service designations BL 14 inch gun Mk II.
- 12px Media related to 14"/45 caliber naval gun at Wikimedia Commons
- 14"/50 caliber gun - later 14" gun (American)
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- Fairfield, A.P. Naval Ordnance Lord Baltimore Press (1921) p. 560
- Campbell, John Naval Weapons of World War Two Naval Institute Press (1985) ISBN 0-87021-459-4 p. 121
- DiGiulian, Tony (2008-03-27). "14"/45 (35.6 cm) Marks 1, 2, 3 and 5". Navweaps.com. Retrieved 2008-10-09.
- DiGiulian, Tony (2008-03-27). "14"/45 (35.6 cm) Marks 8, 9, 10 and 12". Navweaps.com. Retrieved 2008-10-09.
- "Pennsylvania". Dictionary of American Naval Fighting Ships. Navy Department, Naval History & Heritage Command. Retrieved 28 November 2008.
- "New York". DANFS. Retrieved 28 November 2008.
- "Texas". DANFS. Retrieved 28 November 2008.
- "Nevada". DANFS. Retrieved 28 November 2008.
- Lewis, Emanuel Raymond. Seacoast Fortifications of the United States: An introductory history. Annapolis, MD: Naval Institute Press (1979). ISBN 978-1-55750-502-6 p. 123
- Tony DiGiulian, British 14"/45 (35.6 cm) Marks II, IV and V