Indomito 1914
Insidioso 1941
| Name | No | Builder | Laid down | Launched | Comp | Fate |
| Indomito | ID | Pattison, Napoli | 6/1910 | 10/5/1912 | 1/1913 | stricken 7/1937 |
| Impavido | IV | Pattison, Napoli | 1/1911 | 22/3/1913 | 11/1913 | stricken 9/1937 |
| Impetuoso | Pattison, Napoli | 12/1910 | 23/7/1913 | 5/1914 | sunk 10/7/1916 | |
| Insidioso | IS | Pattison, Napoli | 7/1912 | 30/9/1913 | 7/1914 | stricken 9/1938, reinstated 3/1941, scuttled 10/9/1943 |
| Intrepido | Pattison, Napoli | 6/1910 | 7/8/1912 | 2/1913 | sunk 4/12/1915 | |
| Irrequieto | IR | Pattison, Napoli | 6/1910 | 12/12/1912 | 6/1913 | stricken 10/1937 |
|
Displacement normal, t |
672 |
|
Displacement full, t |
770 |
|
Length, m |
72.5 wl 73.0 oa |
|
Breadth, m |
7.30 |
|
Draught, m |
2.40 |
|
No of shafts |
2 |
|
Machinery |
Tosi steam turbines, 4 Thornycroft boilers |
|
Power, h. p. |
16000 |
|
Max speed, kts |
30 |
|
Fuel, t |
oil 100 |
| Endurance, nm(kts) | 1200(14) |
|
Armament |
1 x 1 - 120/40 Armstrong 1891, 4 x 1 - 76/40 Armstrong/Vickers, 2 x 1 - 450 TT |
|
Complement |
69 - 79 |
Ship project history: Project of Indomito class was developed by Pattison under guidance of main designer L. Scaglia in 1912 as answer on appeared in Austro-Hungarian and French navies large destroyers with 100mm main guns. Indomito class ships became the first Italian rigorous destroyers equipped with steam turbines and pure oil-firing boilers. On trials they made 33-35.5kts. For years of the First World War in Italy it has been built 32 destroyers of this class in five groups (Indomito and 4 more "improved" variants), differing from each other basically by the structure and arrangement of armament. All these destroyers were known also under a collective nick "3-funneled destroyers".
Modernizations: 1914, all: - 2 x 1 - 450 TT; + 2 x 2 - 450 TT.
1915 - 1916, all survived: + 10 mines, oil capacity increased to 128t (full displacement was 900t, speed was 27-28kts)
1918 - 1919, all survived: - 1 x 1 - 120/40, 4 x 1 - 76/40; + 5 x 1 - 102/35 Schneider-Armstrong 1914-15, 1 x 1 - 40/39 Vickers-Terni 1917
3/1941, Insidioso: 3 boilers with 2 funnels, 12000shp, 24kts, 758/890t, armament consisted of 1 x 1 - 102/45 Schneider-Armstrong 1917, 2 x 2 - 20/70 Scotti-Isotta Fraschini 1939, 1 x 2 - 13.2/76, 1 x 2 - 533 TT, 2 DCT, complement 75.
Naval service: Intrepido was lost 4/12/1915 off Valona on a mine laid by German submarine UC14. Impetuoso was torpedoed 10/7/1916 by Austrian submarine U17 in the Otranto Straits.
In October, 1929 four survived ships were re-rated as torpedo boats, and stricken in 1937-1938. Insidioso, leaved in the reserve, in March, 1941 was again commissioned after modernization. Being rated as torpedo boat, she some time was used as a target ship for drill of submariners, and then as escort. Insidioso 10/9/1943 was captured at Pola by German troops, renamed TA21 Wildfang, damaged by British aircraft 9/8/1944 and 5/11/1944 sunk at Fiume during repair by Allied bombers.
Indomito 1916
Insidioso 1941
© Ivan Gogin, 2009-11