X3 1930s
| Name | No | Yard No | Builder | Laid down | Launched | Comp | Fate |
| X2 | Ansaldo, Sestri Ponente | 8.1916 | 25.4.1917 | 2.1918 | laid up 9.1940 | ||
| X3 | Ansaldo, Sestri Ponente | 8.1916 | 29.12.1917 | 8.1918 | laid up 9.1940 |
|
Displacement standard, t |
394 |
|
Displacement normal, t |
403 / 468 |
|
Length, m |
42.6 |
|
Breadth, m |
5.52 |
|
Draught, m |
3.15 |
|
No of shafts |
2 |
|
Machinery |
2 Sulzer diesels / 2 Ansaldo electric motors |
|
Power, h. p. |
650 / 325 |
|
Max speed, kts |
8.2 / 6.3 |
|
Fuel, t |
diesel oil |
| Endurance, nm(kts) | 1200(8) / 70(3) |
|
Armament |
1 x 1 - 76/30 A1914, 18 mines |
|
Complement |
22 - 25 |
| Diving depth operational, m | 40 |
Project history: Small submarine minelayers, designed on the sample of trophy Austro-Hungarian submarine U24 (ex-German UC12). Saddle-tank hull. The "German" scheme of minelaying: nine vertical trunks on two mines each. Unsuccessful boats, too slow and badly controlled.
Modernizations: early 1920s, both: + 2 - 450 TT (bow, 2)
Naval service: Since 1936 both were used for training. In September, 1940 both submarines were disarmed and converted to hulks.
X3 1918
© Ivan Gogin, 2009-14