The first USN weapon in this caliber, it proved to be a reliable weapon although early units suffered from droop as the hoops were not adequately locked together.
The Mark 1 ran through fourteen modifications, the most notable being Mod 6 with the introduction of down-swinging breech plugs for confined turret spaces and Mod 12 which had an increased chamber size to allow for larger charges and thus higher muzzle velocities. The original design of Mark 1 Mod 1 was A tube without liner, jacket, eight hoops and a screw box liner. The drooping problem was rectified by adding four hoop-locking rings and replacing the foremost hoop of the outer layer with a longer one. Most guns were also relined during this modification.
The Mark 2 was very similar to the Mark 1, the Mark 3 introduced a longer slide and had only three hoop locking rings and the Mark 5 was of simpler construction with only five hoops. These guns were interchangeable and most battleships had a combination of Mark numbers.
There is a myth that these guns were used at Fort Drum in the Philippines. Actually, those guns were Army 14"/40 (35.6 cm) Model 1909, which were unusual for US guns in being wire-wound.
These guns were rebuilt and redesignated in the 1930s. See the 14"/45 (35.6 cm) Mark 8 data page for information.
|Designation||14"/45 (35.6 cm) Marks 1, 2, 3 and 5|
|Ship Class Used On||New York (B-34), Nevada (B-36) and Pennsylvania (B-38) classes|
|Date Of Design||About 1910|
|Date In Service||1914|
|Gun Weight||Without Breech: 140,670 lbs. (63,807 kg)
With Breech: 142,492 lbs. (64,633 kg)
|Gun Length oa||642.5 in (16.318 m)|
|Bore Length||630 in (16.002 m)|
|Rifling Length||542.7 in (13.530 m)|
|Twist||Mark 1 Mods 1 to 6: Increasing RH
1 in 50 to 1 in 32 at the muzzle
Mark 1 Mod 7 to 14: Uniform RH 1 in 32
Marks 2, 3 and 5: Uniform RH 1 in 25
|Chamber Volume||Original Design: 15,332 in3 (251.2 dm3)
Mark 1 Mod 12: 18,200 in3 (298.2 dm3)
|Rate Of Fire||about 1.25 - 1.75 rounds / minute|
|Projectile Types and Weights||Early AP - 1,400 lbs. (635.0 kg)
AP Mark 8 Mods 3, 7, 8 and 11 - 1,402 lbs. (635.9 kg)
Common - 1,400 lbs. (635.0 kg)
|Bursting Charge||Early AP - 31.5 lbs. (14.3 kg) Explosive D
AP Mark 8 - 34.3 lbs. (15.6 kg) Explosive D
Common - about 84.0 lbs. (38.1 kg) Explosive D
|Projectile Length||AP - 49.44 in (125.6 cm)
Common - about 46.5 in (118.1 cm)
|Propellant Charge||Original charge: 365 lbs. (165.6 kg) SPD
Enlarged chamber: 420 lbs. (190.5 kg) SPD
|Muzzle Velocity||With original charge: 2,600 fps (792 mps)
With enlarged charge: 2,700 fps (823 mps)
|Working Pressure||18 tons/in2 (2,835 kg/cm2)|
|Approximate Barrel Life||N/A|
|Ammunition stowage per gun||100 rounds|
- The AP Mark 8 had a thin cap and a very small windshield. Common was obsolete by 1915 and no longer in production.
- Bourrelet diameter was 13.977 inches (35.5 cm).
- Propellant was in four bags.
- The New York class used padeyes attached the shell bases for handling. These were removed before firing.
|Elevation||AP Mark 8||Striking Velocity||Angle of Fall|
|7.4 degrees||13,000 yards (11,890 m)||1,645 fps (501 mps)||10.1|
|8.2 degrees||14,000 yards (12,800 m)||1,595 fps (485 mps)||11.4|
|8.6 degrees||14,500 yards (13,260 m)||1,571 fps (479 mps)||12.1|
|15 degrees||23,000 yards (21,030 m)||---||---|
Note: Time of flight for MV = 2,600 fps (792 mps)
13,000 yards (11,890 m): 19.2 seconds
14,000 yards (12,800 m): 21.1 seconds
14,500 yards (13,260 m): 22.0 seconds
|Range||Side Armor||Deck Armor|
|6,000 yards (5,490 m)||17.2" (437 mm)||---|
|9,000 yards (8,230 m)||14.4" (366 mm)||---|
|12,000 yards (10,920 m)||11.9" (302 mm)||---|
|16,000 yards (14,630 m)||8.9" (226 mm)||---|
|20,000 yards (18,290 m)||6.7" (170 mm)||---|
This data is for face-hardened (Harvey) plates and is from BuOrd table "Elements of US Naval Guns" of 17 May 1918.
New York (5) and Nevada (2)
New York Class: 506 tons (514 mt)
Nevada Class: 532 tons (541 mt)
|Elevation||-5 / +15 degrees|
|Rate of Elevation||4 degrees per second|
|Train||about -150 / +150 degrees|
|Rate of Train||1.7 degrees per second|
|Gun Recoil||40 in (102 cm)|
|Loading Angle||0 degrees|
- The two-gun turrets were individually sleeved but the triple turrets were not. All turrets were electrically powered with hydraulic drive gears for training and elevation.
- The New York class used a 25 hp motor for training while the later ships used a 50 hp motor. Each gun on the New York class had a 15 hp motor for elevation. The Nevada class had a 30 hp elevation motor for each gun in the two-gun turrets, while the triple turrets on this class and the Pennsylvania class had a single 40 hp elevation motor.
- The New York class stored projectiles point-downwards in the shell rooms. These were moved by man-powered block and tackle on a chain trolley to a lower handling room just below the rotating structure. A lower hoist, powered by a 10 hp motor, ran between the lower shell handling room and an upper shell handling room located within the rotating structure. This upper handling room held 15 projectiles per gun. Each gun in the two-gun turrets had a bucket hoist which ran between the upper shell handling room to the loading position. The bucket hoists were powered by 40 hp motors. Projectiles were stored, handled and hoisted point-downwards at all times until they reached the loading station. Each gun had an endless chain hoist for the powder charges, both powered by a single 11 hp motor. The powder hoists went to a handling room directly below the gun house from where the charges were passed by hand through hand-ups to the guns. A powered rammer was used for the projectiles while the charges were hand loaded into the guns. Breech mechanisms were hand operated and the breech plugs swung sideways.
- The two-gun turrets on the Nevada class had pusher shell hoists within the rotating structure, each with its own 30 hp motor. These ran between the shell handling room to the loading position. The shells were stowed on their bases and parbuckled from the fixed structure to the handling room. The lower charge hoists were powered by a 10 hp motor. These went to a handling room directly below the gun house. From there, upper hoists powered by 7.5 hp motors delivered the charges to the guns.
- The triple turrets were supplied by two shell and three powder hoists. The left shell hoist supplied the center gun. These hoists were similar to the ones in the two-gun turrets used on the Nevada class, except that in the Pennsylvania class the shell hoists were powered from a single 60 hp motor and the powder hoists were each powered by a 10 hp motor. The powder hoists ran directly to the gun house where the charges were transferred to enclosed powder trays.
- The distance between gun axes on USS Texas was measured at 87.25 inches (221.6 cm) by the assistant curator in 2009. The distance between gun axes on the triple turrets was about 59 in (150 cm).
"Naval Weapons of World War Two" by John Campbell
"Powder and Propellants: Energetic Materials at Indian Head, Maryland, 1890-2001 - Second Edition" by Rodney Carlisle
"US Battleships: An Illustrated Design History", "Battleship Design and Development 1905-1945" and "US Naval Weapons" all by Norman Friedman
"Battleships: United States Battleships, 1935-1992" by W.H. Garzke, Jr. and R.O. Dulin, Jr.
Seacoast Fortifications of the United States: An Introductory History" by Emanuel Raymond Lewis
"Round Shot to Rockets: A History of the Washington Navy Yard and the United States Naval Gun Factory" by Taylor Peck
"Battleships" by Paul Stillwell
"Naval Ordnance - A Text Book" revised in 1915 by Lt. Cmdr. Roland I. Curtain and Lt. Cmdr. Thomas L. Johnson
"Navy Ordnance Activities: World War, 1917-1918" by Navy Dept, United States, Bureau of Ordnance
"Range and Ballistic Tables 1935" by U.S. Department of Ordnance and Gunnery
"U.S. Explosive Ordnance: Ordnance Pamphlet 1664 - May 1947" by Department of the Navy
Special help from Lee McIntire, William Jurens and Steve Blake
15 August 2008 - Benchmark
17 January 2009 - Added picture of 14" (35.6 cm) shell being stowed
19 January 2009 - Updated ammunition information
15 September 2009 - Removed picture mislabled as "New York"
26 November 2009 - Added axes measurement for two-gun turrets
20 September 2010 - Added information on USS Texas turret arrangements, updated links to Tom Scott's website
22 April 2015 - Redid photograph of USS New York
11 July 2016 - Converted to HTML 5 format