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X2 coastal submarine minelayers (1918)


Photo



X3 1918  

Ships


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


Technical data


Displacement standard, t394
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, m40


Standard scale images


<i>X3</i> 1930s
X3 1930s


Graphics


<i>X3</i> 1918  
X3 1918  


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.