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Japanese 3.9"/65 Type 98 Antiaircraft Gun


Photograph of 3.9" gun turrets on Japanese destroyer

Campbell (1985). Via CombinedFleet.com.

Fair use may apply.


Specifications:


Bore diameter
3.937"
100mm
Ammunition type
Fixed nose-fused HE rounds

Weight of round

28.7 lbs
13 kg

Velocity

3314 feet per second
1010 meters per second

Maximum elevation      

90 degrees

Range

21,300 yards
19,500 meters

Altitude

42,650 feet
13,000 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 the U.S. 5”/38 dual-purpose gun. Its directors were also poorer, and the 3.9”/65 lacked the radar proximity fuse developed by the Allies. 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)



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