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         Pittsburgh 1919  

Ships

No	Name	Yard No	Builder	Laid down	Launched	Comm	Fate
ACR4, 7.1920- CA4	Pennsylvania, 8.1912- Pittsburgh	317	Cramp, Philadelphia	7.8.1901	22.8.1903	9.3.1905	stricken 10.1931
ACR5, 7.1920- CA5	West Virginia, 11.1916- Huntington	38	Newport News	16.9.1901	18.4.1903	23.2.1905	stricken 3.1930
ACR6	California, 9.1914- San Diego	78	Union Iron Wks, San Francisco	7.5.1902	28.4.1904	1.8.1907	sunk 19.7.1918
ACR7, 7.1920- CA7	Colorado, 11.1916- Pueblo	316	Cramp, Philadelphia	25.4.1901	25.4.1903	19.1.1905	BU 10.1930
ACR8, 7.1920- CA8	Maryland, 11.1916- Frederick	39	Newport News	29.10.1901	12.9.1903	18.4.1905	stricken 11.1929
ACR9, 7.1920- CA9	South Dakota, 6.1920- Huron	79	Union Iron Wks, San Francisco	30.9.1902	21.7.1904	27.1.1908	stricken 11.1929

Technical data

Displacement normal, t	13680
Displacement full, t	15138
Length, m	153.6
Breadth, m	21.2
Draught, m	7.34 mean
No of shafts	2
Machinery	ACR4, 7: 2 VTE, 32 Niclausse boilers ACR5, 6, 8, 9: 2 VTE, 16 Babcock & Wilcox boilers
Power, h. p.	23000
Max speed, kts	22
Fuel, t	ACR4, 7: coal 1980 ACR5, 8: coal 1850 ACR6, 9: coal 2075
Endurance, nm(kts)	5000(10)
Armour, mm	Krupp and Harvey steel - belt: 152 - 127, (89 at ships ends), deck: 102 - 38, barbettes: 152 - 76, turrets: 165 - 152, casemates: 127, CT: 229
Armament	2 x 2 - 203/42 Mk V, 14 x 1 - 152/49 Mk VI/VIII, 18 x 1 - 76/50 Mk III/V/VI, 12 x 1 - 47/40-45 Driggs-Schroeder Mk I/II, 2 x 1 - 37/40 Driggs-Schroeder heavy Mk I, 2 - 450 TT (beam)
Complement	829 - 928

Standard scale images

Graphics

Project history

Authorized under the Acts of 3.3.1899 (first three) and 7.6.1900 (second three). Much larger than the two previous US armoured cruisers, they were distinctly undergunned for their size.

Ship protection

Main belt protected machinery only. Its thickness was 127mm except 152mm waterline. Armoured deck over citadel was 38mm behind the belt at flat part and connected with lower belt edge by 102mm slopes. This deck was 102mm with 102mm slopes at ship ends. Barbette bases and ammunition tubes had 76mm protection. Upper part of barbettes was 152mm thick. Turrets had 165-152mm sides and 38mm crowns. Secondary guns were protected by 127mm casemates.

Modernizations

1909 - 1911, all: - 2 x 2 - 203/42; + 2 x 2 - 203/45 Mk VI; new cage foremasts were installed

1914 - 1919, Pittsburgh: - 6 x 1 - 152/50 (may be temporarily), (6 - 8) x 1 - 76/50; + 2 x 1 - 76/52 Mk X; boilers were replaced by 16 Babcock & Wilcox

1914 - 1919, Huntington, San Diego, Frederick, Huron: - 10 x 1 - 152/50 (may be temporarily), (6 - 8) x 1 - 76/50; + 2 x 1 - 76/52 Mk X

1914 - 1919, Pueblo: - 10 x 1 - 152/50 (may be temporarily), (6 - 8) x 1 - 76/50; + 2 x 1 - 76/52 Mk X; boilers were replaced by 16 Babcock & Wilcox

1917, Huntington (temporarily): + 1 catapult, 4 airplanes, 1 balloon

1922, Pittsburgh: 4 boilers and 1 funnel were removed.

Naval service

Huntington was finally decommissioned in 1920, Frederick in 1922, Huron and Pueblo in 1927, the latter after six years as a receiving ship al New York, and Pittsburg in 1931. San Diego was 19.7.1918 either mined or torpedoed by German submarine U156 and capsized and sank in about 20 minutes.