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Description

This weapon was imported from the British firm of Vickers and used as an AA MG on a few ships in the 1920s. Some small quantity of these guns were also built in Japan. This weapon was water-cooled and recoil operated.

This weapon had a low muzzle velocity and a short effective range. For that reason, these guns were replaced on most warships starting in 1935 by the Hotchkiss 13 mm gun.

Actual bore diameter was 0.303" (7.65 mm).

Gun Characteristics

Designation Vickers 7.7 mm/94 (0.303") "HI" Type
Ship Class Used On A few ships 1925 to 1935
Date Of Design about 1923
Date In Service 1925
Gun Weight 30.5 lbs. (13.85 kg)
Gun Length oa 39.4 in (1.000 m)
Bore Length 28.4 in (0.721 m)
Rifling Length N/A
Grooves 5
Lands N/A
Twist N/A
Chamber Volume N/A
Rate Of Fire 900 rounds per minute cyclic

Ammunition

Type Fixed
Weight of Complete Round N/A
Projectile Types and Weights Solid bullet: 0.025 lbs. (11.35 gms)
Bursting Charge N/A
Projectile Length N/A
Propellant Charge 0.09 oz (2.60 gms)
Muzzle Velocity 2,444 fps (745 mps)
Working Pressure N/A
Approximate Barrel Life N/A
Ammunition stowage per gun N/A 1
  • ^Ammunition was supplied in 100 round belts.

Range

Range with 0.025 lbs. (11.35 gms) Bullet
Elevation Distance
50 degrees 4,370 yards (4,000 m)
Action Range 1,090 yards (1,000 m)
Effective Range 330 yards (300 m)
AA Ceiling 9,840 feet (3,000 m)

Mount/Turret Data

Designation Single Mounts: Type 92 Tripod
Weight 57.3 lbs. (26 kg)
Elevation -25 / +85 degrees
Elevation Rate Manually operated, only
Train 360 degrees
Train Rate Manually operated, only
Gun recoil N/A

Sources

Data from:

  • "Naval Weapons of World War Two" by John Campbell
  • "Japanese Cruisers of the Pacific War" by Eric Lacroix and Linton Wells II

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