The Pacific War Online Encyclopedia: Japanese 3.9"/65 AA Gun (original) (raw)

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Japanese3.9"/65 Type 98 AntiaircraftGun

Photograph of 3.9" gun turret on Japanese destroyer

Wikimedia Commons

Specifications:

Bore diameter 3.937"100mm
Ammunition type Fixed nose-fused HE rounds
Weight of round 28.7 lbs13 kg
Velocity 3314 feet per second1010 meters per second
Maximum elevation 90 degrees
Range 21,300 yards19,500 meters
Altitude 42,650 feet13,000 meters
Firing cycle 2.9 seconds

This was the best antiaircraft gun developed by the Japanese before the war. It had excellent elevation and reach and could traverse quickly. Its rate of fire was good, though not as good as theU.S. 5”/38 dual-purpose gun. Its directors were also poorer, and the 3.9”/65 lacked the radarproximity fuse developed by theAllies. Only 169 were produced, and only 100 of these made it onto ships, which included the Akizukis,Taiho, and Oyodo.

References

Campbell (1985)

CombinedFleet.com (accessed 5 January 2007)

The Pacific War Online Encyclopedia © 2007, 2009 by Kent G. Budge. Index


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