| 152 mm /53 Model 1926–1929 | |
| Origin: | Italy |
| Type: | Naval gun |
| Is Explosive: | yes |
| Is Artillery: | yes |
| Service: | 1926–1964 |
| Used By: | Italy |
| Wars: | World War II |
| Designer: | Ansaldo |
| Design Date: | 1926 |
| Manufacturer: | Ansaldo OTO Melara |
| Production Date: | 1926–1929 |
| Weight: | Model 1926: 7.34 metric tons Model 1929: 7.69 metric tons |
| Length: | 8.5m (27.9feet) |
| Part Length: | 8m (26feet) 53 caliber |
| Cartridge Weight: | Early: 50kg (110lb) Late: 47.5kg (104.7lb) |
| Caliber: | 152mm |
| Rate: | Model 1926: 4 rpm Model 1929: 5-8 rpm |
| Velocity: | Early: 1000m/s Late: 850m/s |
| Max Range: | Early: 28.4km (17.6miles) at +45° Late: 22.6km (14miles) at +45°[1] |
| Breech: | Horizontal sliding breech block |
| Elevation: | Model 1926: -5° to +45° Model 1929:-10° to +45° |
| Traverse: | -150° to +150°[2] |
The 152 mm /53 Model 1926–1929 were built for the Italian Navy in the years before World War II. These guns were used on all Condottieri-class light cruisers except the Duca degli Abruzzi-class.
The Model 1926 was designed and manufactured by Ansaldo, while the Model 1929 was manufactured by OTO Melara. Although both models of gun were similar in construction, components from each manufacturer were not fully interchangeable.
The gun mounts had electrically powered training, elevation, hoists, rammers and the guns shared a common cradle. Improvements in ammunition handling meant that the rate of fire for the Model 1929 was nearly twice as fast as the Model 1926. Loading was at +20° for the Model 1926, while the model 1929 could be loaded at any angle up to 45°. These guns suffered from dispersion problems so the original muzzle velocity of 1000m/s was reduced to 850m/s with AP shells. Shell weight was also reduced from 50kg (110lb) to 47.5kg (104.7lb) in an attempt to resolve these problems, but were only partially successful. The main reason for the dispersion problem was because the guns were mounted too close together on a common cradle, which also complicated loading of the guns.[3]
The majority of the Condottieri-classes had two superfiring twin-mount turrets forward and aft, except for the Duca degli Abruzzi-class which had different model guns and had two twin-turrets replaced with two triple-turrets. The Giussano-class carried Model 1926 guns, while the Cadorna-class, Montecuccoli-class and Duca d'Aosta-class carried Model 1929 guns. The mountings for the Giussano-class and Cadorna-class were found to be too lightly built for the recoil forces created by these guns.[4]
Ammunition was of quick fire separate loading type. The AP projectile was 63cm (25inches) long with a cartridge case and a bagged charge which weighed 21.43kg (47.25lb).
The gun was able to fire:
Surviving examples of Model 1929 guns salvaged from the Cruiser Raimondo Montecuccoli are located at the Città della Domenica theme and amusement park near Perugia, in Italy.