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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).
| 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 |
| 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.
| 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) |
Data from:
- "Naval Weapons of World War Two" by John Campbell
- "Japanese Cruisers of the Pacific War" by Eric Lacroix and Linton Wells II
- 09 May 2006
- Benchmark
- 27 May 2012
- Updated to latest template