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U.S. 14"/45 Mark 12 Gun


Photograph of 14"/45 guns on USS Pennsylvania

Naval Historical Center #50758


Specifications:


Bore
14"
355.6mm
Ammunition type
Bagged
Weight of projectile 1500 lbs
680 kg
Velocity 2600 feet per second
792 meters per second
Maximum elevation     
30 degrees
Range 34,300 yards
31,360 meters
Firing cycle 50 seconds
Penetration
11.9" at 12,000 yards
30 cm at 11,000 m


These guns constituted the main armament for the New Yorks, Nevadas, and PennsylvaniasFirst test-fired in January 1910, the new weapon pleased the Navy as being "remarkable for the uniformity of results" (quoted in Friedman 1985). However, they suffered from problems in both barrel design (resulting in excessive droop, reducing accuracy) and magazine arrangements.  The former was mitigated by relining the barrels and the latter concern was dismissed after tests suggested the potential for a magazine explosion was not as great as originally feared.

References

Campbell (1985)

Friedman (1978, 1985)



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