N1 1918
| Name | No | Builder | Laid down | Launched | Comp | Fate |
| N1 | Ansaldo, Sestri Ponente | 3/1916 | 6/9/1917 | 7/1918 | stricken 10/1930 | |
| N2 | Ansaldo, Sestri Ponente | 3/1916 | 26/1/1918 | 12/1918 | stricken 5/1928 | |
| N3 | Ansaldo, Sestri Ponente | 3/1916 | 27/4/1918 | 10/1918 | stricken 8/1935 | |
| N4 | Ansaldo, Sestri Ponente | 3/1916 | 6/10/1918 | 4/1919 | stricken 8/1935 | |
| N5 | Tosi, Taranto | 8/1916 | 18/11/1917 | 1/1919 | stricken 7/1929 | |
| N6 | Tosi, Taranto | 8/1916 | 20/9/1918 | 6/1919 | stricken 8/1935 |
|
Displacement standard, t |
262 |
|
Displacement normal, t |
277 / 363 |
|
Length, m |
45.8 |
|
Breadth, m |
4.28 |
|
Draught, m |
3.17 |
|
No of shafts |
2 |
|
Machinery |
N1 - 4: Sulzer diesels / Ansaldo electric motors N5, 6: Tosi diesels / Ansaldo electric motors |
|
Power, h. p. |
N1 - 4: 650 - 400 / 400 N5, 6: 700 - 820 / 400 - 450 |
|
Max speed, kts |
N1 - 4: 12.5 / 7.6 N5, 6: 13.5 / 7.9 |
|
Fuel, t |
diesel oil 9 - 10 |
|
Endurance, nm(kts) |
N1 - 4: 1300(9) / 80(2) N5, 6: 1485(9) / 120(2) |
|
Armament |
2 - 450 TT (bow, 4), 1 x 1 - 76/30 Armstrong 1914 |
|
Complement |
23 |
| Diving depth operational, m | 40 |
Ship project history: Increased and improved Nautilus. N5 and N6 had more powerful diesels.
Modernizations: None.
Naval service: No significant events.
N1 1918
N4 post-war
© Ivan Gogin, 2009-11