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U.S. 5”/51 Mark 7 Gun


Photograph of 5"/51 gun in shielded single mount

Navy History and Heritage Command #NH 105892. Cropped by author.


Specifications:


Bore
5"
127mm
Ammunition type
Semi-fixed
Weight of round 50 lbs
22.7 kg
Velocity 3150 feet per second
960 meters per second
Maximum elevation       25 degrees
Range 15,850 yards
14,490 meters
Firing cycle 7 seconds


This gun was designed exclusively for surface use and was mounted on all the older battleships and many other vessels.  It was occasionally replaced with the 5"/38 as these became available.  It had a tremendous muzzle velocity but a rather slow traverse and rate of fire.

References

Campbell (1985)



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