| Class overview | |
|---|---|
| Builders | Cantieri navali Tosi di Taranto,Taranto |
| Operators |  Regia Marina |
| Preceded by | Pisani class |
| Succeeded by | Pietro Micca |
| Built | 1927–1931 |
| In service | 1931–1948 |
| Completed | 2 |
| Scrapped | 2 |
| General characteristics (after modification) | |
| Type | Submarineminelayer |
| Displacement | |
| Length | 68 m (223 ft 1 in) |
| Beam | 7.1 m (23 ft) |
| Draft | 4.3 m (14 ft 1 in) |
| Installed power | |
| Propulsion |
|
| Speed |
|
| Range |
|
| Test depth | 90 m (300 ft) |
| Crew | 56 |
| Armament |
|
TheBragadin-class submarines were built for theRegia Marina (Royal Italian Navy) during the late 1920s. Both boats participated in theSecond World War and were discarded in 1948.
TheBragadin-class submarines were essentiallyminelaying versions of the earlierPisani class. They shared that class's problems withstability and had to be modified to correct those problems after completion. Theydisplaced 981metric tons (966long tons) surfaced and 1,167metric tons (1,149long tons) submerged. As built the submarines were 71.5 meters (234 ft 7 in) long, had abeam of 6.15 meters (20 ft 2 in) and adraft of 4.8 meters (16 ft). In 1935 the stern was shortened and the boats were bulged to improve their stability. They now measured 68 meters (223 ft) in length and had a beam of 7.1 meters (23 ft 4 in) and draft of 4.3 meters (14 ft 1 in). They had anoperational diving depth of 90 meters (300 ft). Their crew numbered 56 officers and enlisted men.[1]
For surface running, the boats were powered by two 750-brake-horsepower (559 kW)diesel engines, each driving onepropeller shaft. When submerged each propeller was driven by a 500-brake-horsepower (373 kW)electric motor. They could reach 11.5knots (21.3 km/h; 13.2 mph) on the surface and 7 knots (13 km/h; 8.1 mph) underwater. On the surface, theBragadin class had a range of 4,180nautical miles (7,740 km; 4,810 mi) at 6.5 knots (12.0 km/h; 7.5 mph), submerged, they had a range of 86 nmi (159 km; 99 mi) at 2.2 knots (4.1 km/h; 2.5 mph).[1]
The boats were armed with four internal 53.3 cm (21 in)torpedo tubes in the bow for which they carried sixtorpedoes. In the stern were two tubes which could accommodate a total of 16 or 24 naval mines, depending on the type. They were also armed with one102 mm (4 in)deck gun for combat on the surface. Theiranti-aircraft armament consisted of two13.2 mm (0.52 in) machine guns.[2]
| Ship | Builder[2] | Laid down[3] | Launched[3] | Completed[3] | Fate[3] |
|---|---|---|---|---|---|
| Marcantonio Bragadin | Cantiere Navale Triestino,Trieste | 3 Feb 1927 | 21 Jul 1929 | 16 Nov 1931 | Stricken from theNavy List, 1 Feb 1948 |
| Filippo Corridoni | 4 Jul 1927 | 30 Mar 1930 | 17 Nov 1931 |
