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Imperator Alexandr II

Ships

Name	No	Yard No	Builder	Laid down	Launched	Comp	Fate
Император Александр II [Imperator Alexandr II], 5.1917- Заря Свободы [Zarya Svobody]			New Admiralty, St. Petersburg	30.6.1886	26.7.1887	9.1890	TS 1914, sold 15.8.1922
Император Николай I [Imperator Nikolay I]			Franko-Russkiy plant, St. Petersburg	20.3.1886	1.6.1889	7.1891	captured by Japan 28.5.1905 (壱岐 [Iki])

Technical data

Displacement normal, t	Imperator Alexandr II: 10010 Imperator Nikolay I: 9672
Displacement full, t
Length, m	99.3 pp 101.7 wl 105.6 oa
Breadth, m	20.4
Draught, m	7.77
No of shafts	2
Machinery	Imperator Alexandr II: 2 VC, 12 cylindrical boilers Imperator Nikolay I: 2 HTE, 12 cylindrical boilers
Power, h. p.	8500
Max speed, kts	15.3
Fuel, t	Imperator Alexandr II: coal 1200 Imperator Nikolay I: coal 1370
Endurance, nm(kts)	4800(8)
Armour, mm	Imperator Alexandr II: compound; belt: 356 - 102, barbette: 254, battery: 152 - 76, CT: 254, deck: 63 Imperator Nikolay I: compound; belt: 356 - 102, turret: 254, barbette: 254, battery: 152 - 76, CT: 203, deck: 63
Armament	Imperator Alexandr II: 1 x 2 - 305/27 obr. 1877, 4 x 1 - 229/32 obr. 1877, 8 x 1 - 152/32 obr. 1877, 4 x 1 - 63/17 Baranovski, 10 x 5 - 47/22 Hotchkiss, 8 x 5 - 37/27 Hotchkiss, 5 - 381 TT (1 bow, 4 beam) Imperator Nikolay I: 1 x 2 - 305/27 obr. 1877, 4 x 1 - 229/32 obr. 1877, 8 x 1 - 152/32 obr. 1877, 2 x 1 - 63/17 Baranovski, 10 x 5 - 47/22 Hotchkiss, 8 x 5 - 37/17 Hotchkiss, 6 - 381 TT (1 bow, 1 stern, 4 beam)
Complement	616

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Project history

Small cheap battleships for Baltic intended to operate against Swedish and German contemporaries. First ship, Imperator Alexandr II, carried main guns in the barbette mount, and the second, Imperator Nikolay I, had the turret.

Ship protection Imperator Alexandr II

Complete belt had 2.44m height and 356mm thickness (tapering to 152mm at lower edge) amidships (between main gun barbette and main mast) decreased respectively to 305mm till main gun barbette fwd and area between aft 229mm and 152mm casemates aft, 225mm till fwd TT and aft bulkhead of aft casemate. Aft part of belt had 125mm thickness, fwd part between fwd TT and stem divided to 3 approximately equal parts with 203-, 152- and 100mm thickness. Belt was covered by flat 63mm deck. 229mm guns had 76-51mm protection alongside ship and 152mm transverse bulkheads, 152mm guns had local 51mm protection. Main gun barbette had 254mm sides and 76mm crown.

Ship protection Imperator Nikolay I

Complete belt had 2.44m height and 356mm thickness (tapering to 152mm at lower edge) amidships (between main gun barbette and main mast) decreased respectively to 305mm till main gun barbette fwd and area between aft 229mm and 152mm casemates aft, 225mm till fwd TT and aft bulkhead of aft casemate. Aft part of belt had 125mm thickness, fwd part between fwd TT and stem divided to 3 approximately equal parts with 203-, 152- and 100mm thickness. Belt was covered by flat 63mm deck. 229mm guns had 76-51mm protection alongside ship and 152mm transverse bulkheads, 152mm guns had local 51mm protection. Main gun turret had 254mm sides and 63mm roof, barbette had 254mm protection.

Modernizations

1900, Imperator Nikolay I: boilers were replaced by 16 Belleville; - 10 x 5 - 47/22, 6 x 5 - 37/17; + 16 x 1 - 47/40 Hotchkiss

1904, Imperator Nikolay I: + 1 x 1 - 152/44 Canet, some (probably 6 - 8) x 1 - 75/48 Canet

1904, Imperator Alexandr II: - 4 x 1 - 229/32, 8 x 1 - 152/32, 10 x 5 - 47/22, 8 x 5 - 37/17, 5 - 381 TT; + 5 x 1 - 203/43, 8 x 1 - 152/44 Canet, 10 x 1 - 47/40 Hotchkiss, 8 x 1 - 7.6/94

1915, Imperator Alexandr II: - 2 x 1 - 47/40, 6 x 1 - 7.6/94; + 1 x 1 - 75/48 Canet

Naval service

Imperator Nikolay I surrendered to Japanese in the Battle of Tsushima 28.5.1905, repaired and incorporated to Japanese navy as Iki. She was stricken in 1915 and sunk as target in October. Imperator Alexandr II was used for gunnery training from 1914 and laid up in May 1921.