The Schneider-Armstrong Model 1917 was virtually a copy of the British 4"/45 (10.2 cm) Mark V, one of which (No. 974) was supplied to Italy during World War I to be used as a pattern. Model 1919 was an unsuccessful use of this weapon in a twin mounting which was replaced by single mountings during the war. Some guns used vertical rather than the standard horizontal sliding breech block.
The Schneider-Canet Model 1917 was a very similar design but in a different single mounting.
Some of these guns were remounted on AA mountings during the interwar period.
| Designation | 102 mm/45 (4") Schneider-Armstrong Model 1917 and 1919 102 mm/45 (4") Schneider-Canet Model 1917 |
|---|---|
| Ship Class Used On | S-A Model 1917: "Generali," Palestro, La Masa and Sirtori classes plus small auxiliaries S-A Model 1919: Curtalone class S-C Model 1917: Mirabello class |
| Date Of Design | British: About 1913 Italian: 1917 |
| Date In Service | 1917 |
| Gun Weight | 2.364 tons (2.327 mt) |
| Gun Length oa | 187.8 in (4.770 m) |
| Bore Length | 180.0 in (4.572 m) |
| Rifling Length | 149.7 in (3.803 m) |
| Grooves | (32) 0.037 in deep x 0.27 in (0.94 mm x 6.86 mm) |
| Lands | 0.1227 in (3.117 mm) |
| Twist | Uniform RH 1 in 30 |
| Chamber Volume | N/A |
| Rate Of Fire | 7 rounds per minute 1 |
- ^The ROF figure comes from "Italian Warships of World War II." However, the British version of this weapon is generally credited with a ROF of 10 - 12 rounds per minute.
| Type | Fixed |
|---|---|
| Weight of Complete Round | AP: N/A HE: N/A |
| Projectile Types and Weights | AP: 35.3 lbs. (16 kg) HE: 30.3 lbs. (13.74 kg) |
| Bursting Charge | N/A |
| Projectile Length | N/A |
| Propellant Charge | N/A |
| Muzzle Velocity | 2,789 fps (850 mps) 1a |
| Working Pressure | N/A |
| Approximate Barrel Life | N/A |
| Ammunition stowage per gun | N/A |
- ^These Italian guns had a higher muzzle velocity than did the British ones, suggesting that a greater working pressure was permitted.
| Elevation | 276.2 lbs. (125.3 kg) APC | 243.77 lbs. (110.57 kg) HE |
|---|---|---|
| 35 degrees | 16,400 yards (15,000 m) |
| Designation | S-A Model 1917: Single open mount S-A Model 1919: Twin mount S-C Model 1917: Single open mount Model 1936: AA mounting |
|---|---|
| Weight | S-A Model 1917: 4.53 tons (4.6 mt) S-A Model 1919: 9.84 tons (10 mt) S-C Model 1917: N/A Model 1936 AA mounting: N/A |
| Elevation | S-A Model 1917: -5 / +35 degrees S-A Model 1919: -5 / +35 degrees S-C Model 1917: -5 / +30 degrees Model 1936 AA mounting: -5 / +85 degrees |
| Elevation Rate | Manually operated, only |
| Train | 360 degrees |
| Train Rate | Manually operated, only |
| Gun recoil | N/A |
Data from:
- "Naval Weapons of World War Two" by John Campbell
- "Italian Warships of World War II" by Aldo Fraccaroli
- 31 January 2008
- Benchmark
- 25 January 2010
- Updated picture
- 23 September 2012
- Added picture of museum gun
- 26 December 2013
- Added picture of Giovanni Acerbi