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In 1944 a twin mount 3-1 was designed using two 84-KM guns. The trials were successful, but the mount was not accepted into production. Guns used in single mountings are air-cooled and the mountings are similar to those used for 20 mm Oerlikon guns. These guns are clip-fed and single mountings have 11 ready clips. Actual bore diameter is 25.4 mm (1.0"). |
25 mm/76 at the Military Museum in Mangalia,
Romania
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| Designation | 25 mm/76 (1") 84-KM |
| Ship Class Used On | Light ships 1944-45 |
| Date Of Design | 1941-44 |
| Date In Service | 1944 |
| Gun Weight | 94.8 lbs. (43 kg) |
| Gun Length oa | 82.52 in (2.096 m) (with flash suppresser) |
| Barrel Length | 75.39 in (1.915 m) |
| Rifling Length | 66.86 in (1.683 m) |
| Grooves | 12 |
| Lands | N/A |
| Twist | N/A |
| Chamber Volume | 7.323 in3 (0.121 dm3) |
| Rate Of Fire | Cyclic: 200-260 rounds per minute |
| Type | Fixed |
| Weight of Complete Round | FRAG incendiary tracer (OZR-132) - 1.38
lbs. (0.627 kg)
AP tracer (Br-132) - 1.51 lbs. (0.684 kg) |
| Projectile Types and Weights | FRAG incendiary tracer (OZR-132) - 0.635
lbs. (0.288 kg)
AP tracer (Br-132) - 0.65 lbs. (0.295 kg) |
| Bursting Charge | N/A |
| Projectile Length | N/A |
| Propellant Charge | 0.022 lbs (100 g) |
| Muzzle Velocity | FRAG incendiary tracer (OZR-132) - 2,980
fps (910 mps)
AP tracer (Br-132) - 2,950 fps (900 mps) |
| Working Pressure | 18.4 tons/in2 2,900 kg/cm2 |
| Approximate Barrel Life | 2,000 rounds |
| Ammunition stowage per gun | N/A |
| Elevation | With 0.635 lbs. (0.288 kg) and 0.65 lbs. (0.295 kg) shells |
| Max. Range | 2,625 yards (2,400 m) |
| Effective AA Ceiling | 6,560 feet (2,000 m) |
| Designation | Single Mount 84-KM |
| Weight | 1,885 lbs. (855 kg) (with ammunition and all support systems) |
| Elevation | -9 / +85 degrees |
| Elevation Rate | 7.3 degrees per second |
| Train | 360 degrees |
| Train Rate | 19.24 degrees per second |
| Gun recoil | 4.65 - 5.43 in (118 - 138 mm) |