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Indomito 1916

Ships

Name	No	Yard 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

Technical data

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	2 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 A1891-1910, 4 x 1 - 76/40 A1897, 2 x 1 - 450 TT
Complement	69 - 79

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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 S1914-1915, 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.