NAVYPEDIA

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Coronel Bolognesi 1930s

Ships

Name	No	Yard No	Builder	Laid down	Launched	Comp	Fate
Almirante Grau			Vickers, Barrow, UK	1905	27.3.1906	1.3.1907	stricken 6.1958
Coronel Bolognesi			Vickers, Barrow, UK	1905	24.9.1906	19.11.1907	stricken 6.1958

Technical data

Displacement normal, t	3100
Displacement full, t	4877
Length, m	112.8 pp 115.8 oa
Breadth, m	12.3
Draught, m	4.30
No of shafts	2
Machinery	2 4-cyl VTE, 10 Yarrow boilers
Power, h. p.	14000
Max speed, kts	24
Fuel, t	coal 500
Endurance, nm(kts)	3276(10)
Armour, mm	belt: 38, deck: 38, shields: 76, CT: 76
Armament	2 x 1 - 152/50 Vickers J, 8 x 1 - 76/40 Vickers, 6 x 1 - 57/40 Hotchkiss, 2 x 1 - 37/20 Hotchkiss, 2 - 450 TT
Complement	320

Standard scale images

Graphics

Project history

On centuries border the Government of Peru has made a decision about strengthening of the navy representing concourse of small gunboats and armed merchant vessels. The order for two small cruisers was received by Vickers; building contract for Almirante Grau has been concluded 19.6.1905, Coronel Bolognesi 29.11.1905.     On construction Peruvian ships were close to British scouts of Sentinel class built by the same builder, differing by forecastle form (flush deck instead of turtleback), number of funnels (two instead of three) and stronger armament. Almirante Grau was built as a flag ship, therefore she had additional accommodation spaces in high poop and differed from sister-ship by increased approximately on 20t displacement. On trials both ships exceeded 24kts contract speed (Almirante Grau reached 24.64kts).

Ship protection

Armour protection consisted of 38mm belt amidshipst and armoured deck of the same thickness covering machinery. CT and shields of 152mm guns were protected by 76mm armour.

Modernizations

1923-1925, both: boilers were converted to oil fuel (500t oil, 14000hp, 24kts, 3700(10)nm); - 2 x 1 - 76/40

1933-1935, both: boilers were replaced by new 8 Yarrow boilers (14000hp, 23.5kts, 3700(10)nm)

1936, both: main mast was removed; - 2 x 1 - 76/40, 6 x 1 - 57/40, 2 x 1 - 37/20; + 2 x 1 - 76/40 11-shiki, 2 x 2 - 13.2/76

1942-1944, both: fore pole mast was replaced by tripod, superstructures rebuilt; - 2 x 2 - 13.2/76, 2 - 450 TT; + 7 x 1 - 12.7/90, 1 DCT, 2 DCR

Naval service

In 1950th both cruisers were used as submarine depot ships.