8 cm/40 3rd Year Type naval gun

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8cm/40 3rd Year Type naval gun
An 8cm/40 3rd Year Type gun captured at Guadalcanal
Type Naval gun
Place of origin Empire of Japan
Service history
In service 1914–45
Used by Imperial Japanese Navy
Wars World War I
World War II
Production history
Designed 1914
Number built 69 (plus possibly spares)
Weight 600 kilograms (1,323 lb)
Barrel length 3,048 millimeters (10 ft 0 in) (bore length)

Shell Fixed
Shell weight 5.67–5.99 kilograms (12.5–13.2 lb)
Caliber 7.62-centimeter (3.0 in)
Breech sliding breech block
Carriage pedestal mount
Elevation -5° - +75°
Traverse 360°
Rate of fire 13-20 rounds per minute
Muzzle velocity 670–685 meters per second (2,200–2,250 ft/s)
Maximum firing range 10,800 meters (11,800 yd)

Flight ceiling 5,400 meters (5,900 yd) (eff. ceiling)

The 8cm/40 3rd Year Type naval gun was a Japanese naval anti-aircraft gun introduced during World War I. Although designated as 8 centimeters (3.15 in), its shells were actually 76.2 millimeters (3 in) in diameter.

It was installed on the Sendai-class cruiser, Chikuma-class cruiser, Tenryū-class cruisers, Kuma-class cruisers, Nagara-class cruisers, Japanese cruiser Yūbari, Ise-class battleships, Fusō-class battleships, Japanese aircraft carrier Hōshō, Japanese submarine tender Komahashi, Jingei-class submarine tenders.

During Pacific War the gun was thoroughly obsolete, relegated to secondary duties on smaller ships like Ning Hai-class cruisers, Japanese minelayer Itsukushima, Akagi Maru-class Armed merchantmens, and especially gunboats. Some guns were given to civil air defense in the Southern Japan.[citation needed]



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