Imperator Aleksandr II-class battleship

The Imperator Aleksandr II-class battleships were two battleships built for the Imperial Russian Navy in the 1880s. They were intended to counter the small armored ships of the other Baltic powers. Construction was very prolonged and the ships were virtually obsolescent when completed. They were optimized for ramming.

RUSSIAN BATTLESHIP Imperator Aleksandr II served in the Baltic and Mediterranean Seas before becoming a gunnery training ship in 1904, but she was inactive during World War I before joining the Bolsheviks in 1917. She was sold for scrap in 1922. Imperator Nikolai I served in the Baltic and Mediterranean Seas as well as the Pacific Ocean during the First Sino-Japanese War and the Russo-Japanese War. She surrendered after the Battle of Tsushima in 1905 and was commissioned in the Imperial Japanese Navy before she was sunk as a target in 1915.

Design
The Imperator Aleksandr II-class battleships were the first all-steel battleships to be built for the Baltic Fleet and were designed to allow Russia to dominate the Baltic Sea by defeating rival ships like the DANISH IRONCLAD Helgoland and the German s, both of which were built of wrought iron. They were designed according to the tactical theories of the day which emphasized ramming and incorporated a ram bow. In addition their forecastle deck sloped slightly downwards to allow the main guns to fire at the waterline of the enemy at short range as the ship closed to ram. A full transverse armored bulkhead protected the forward 9 in guns from raking fire and no armor was originally provided to protect them from the side. They were given a full sailing rig to allow for deployments to the Mediterranean and other distant locations although it was never actually used. Imperator Nikolai I was originally going to be built to a completely different design, but this was changed at the last minute to a modified version of the Imperator Aleksandr II design, so there were significant differences between the two ships.

General characteristics
Imperator Aleksandr II was 334 ft long at the waterline and 346 ft long overall. She had a beam of 66 ft and a draft of 25 ft. She displaced 9244 LT at load, over 800 LT more than her designed displacement of 8440 LT. Imperator Nikolai I was dimensionally similar to her sister except that her draft was only 24 ft. She was also 250 LT heavier than her sister.

The hull was subdivided by one centerline longitudinal and ten transverse watertight bulkheads and it had a double bottom extending from frame 12 to frame 74. It had a metacentric height of 3 ft. They were considered to have good seagoing qualities, with a tactical diameter of 570 yd and they could complete a full 360° circle in seven minutes and 32 seconds.

Propulsion
The Imperator Aleksandr II-class ships had two 3-cylinder vertical compound steam engines driving 17 ft screw propellers. Twelve cylindrical boilers provided steam to the engines. The engines of the Imperator Aleksandr II were built by Baltic Works and had a total designed output of 8500 ihp. On trials, the powerplant produced 8289 ihp, and a top speed of 15.27 knots. She carried 967 LT of coal that provided a range of 4400 nmi at a speed of 8 knots and 1770 nmi at a speed of 15 knots.

Imperator Nikolai I's engines were built by the Franco-Russian Works, but only had a designed output of 8000 ihp. They were a disappointment on trials, only producing 7842 ihp, and a top speed of 14.5 knots. She carried 967 LT of coal that gave her a range of 2630 nmi at a speed of 10 knots.

Armament
The main armament of the Imperator Aleksandr II-class ships was a pair of 12 in Obukhov Model 1877 30-caliber guns. Those in Imperator Aleksandr II were fitted in a twin barbette mount forward, but Imperator Nikolai I's guns were fitted in a turret. These guns had a maximum elevation of 15° and could depress 2° and could traverse 220°. 60 rounds per gun were carried. They fired a 731.3 lb shell at a muzzle velocity of 1870 ft/s to a range of 5570 yd at an elevation of 6°. The rate of fire was one round every four to five minutes.

The four 9 in Obukhov Model 1877 35-caliber guns were on center-pivot mounts in casemates at the corners of the citadel, the hull being recessed to increase their arcs of fire ahead or behind. The forward guns could traverse a total of 125°, including targets within about 4° of the centerline. The rear guns had an arc of fire of 105° and could fire on targets within about 10° of the centerline. These guns had a maximum elevation of 15° and could depress 5°. They were provided with 125 rounds per gun. They fired a 'light' shell that weighed 277 - 280 lb or a 'heavy' shell that weighed 415 lb. The muzzle velocity achieved depended on the shell weight and the type of propellant. A 'light' shell with brown powder reached 2142 ft/s while that same shell with smokeless powder achieved 2326 ft/s. In contrast a 'heavy' shell with brown powder could only be propelled at a velocity of 1867 ft/s. A 277-lb 'light' shell had a maximum range of 10330 yd when fired at an elevation of 15° with smokeless powder. The rate of fire was one round every minute or two.

The eight 6 in Model 1877 35-caliber guns were mounted on broadside pivot mounts. Four were fitted between the 9-inch guns and had could traverse a total of 100°. The others were mounted at each end of the ship where they could fire directly ahead or astern. Each gun had an arc of fire of 130°. The guns could elevate to a maximum of 12° and depress 8°. They fired a 'heavy' shell that weighed 119 - 123.5 lb at a velocity of 1896 ft/s or a 'light' shell that weighed 91.5 lb with a muzzle velocity of 2329 ft/s. A 'light' shell had a maximum range of 8170 yd when fired at an elevation of 12°. They could fire one round per minute.

The ten 47 mm Hotchkiss revolving cannon were mounted in hull embrasures of the ship, between the nine and six-inch guns to defend against torpedo boats. They fired a 3.3 lb shell at a muzzle velocity of 1476 ft/s at a rate of 30 rounds per minute to a range of 2020 yd. Four 37 mm Hotchkiss revolving cannon were mounted in each fighting top. They fired a 1.1 lb shell at a muzzle velocity of 1450 ft/s at a rate of 32 rounds per minute to a range of 3038 yd.

Imperator Aleksandr II carried five above-water 15 in torpedo tubes, two in the bow, two broadside tubes that could traverse 70° and a tube in the stern. Smaller 14 in torpedo tubes could be mounted in four of the ship's cutters. 36 mines could be carried. Imperator Nikolai I had six torpedo tubes were that were arranged differently. Only one was in the bow, four were on the broadside, two forward and aft, and the usual stern tube.

Protection
Compound armor was used throughout the Imperator Aleksandr II-class ships. The main waterline belt had a maximum thickness of 14 in abreast the machinery spaces and was 8 ft high on Imperator Aleksandr II. 3 ft of this was supposed to extend above the waterline at design displacement, but only 2 ft was actually above the waterline as actually completed. The belt tapered to 8 in at the lower edge and thinned in stages. It was 12 inches thick abreast the magazines and thinned down to 3.9 in at the bow and 4.9 in at the stern. It was backed by 10 in of wood. The configuration of the waterline belt in Imperator Nikolai I differed somewhat from her sister. The belt was only 8 ft high with 3 ft above the designed waterline and 5 ft below. At bow and stern it was six inches thick. The flat protective deck was positioned at the upper edge of the belt on both ships and was 2.5 in thick and consisted of two layers of mild steel.

The barbette and turret sides had a thickness of 10 inches while the turret roof was 2½ inches thick. Initially the barbette was open-topped, but a 3 in thick protective hood was added in late 1893. The transverse bulkheads were six inches thick, but the nine-inch guns were protected by a patch of side armor only three inches thick and the six-inch guns by a patch only 2 in thick. Originally there was no side armor above the main belt, but that was added when the original disappearing main guns mounts and their pear-shaped barbette were deleted and made some weight available. No partitions separated the casemated guns, nor was there any armor between the guns. The conning tower had 8 in sides on the Imperator Aleksandr II, but they were only six inches thick on Imperator Nikolai I, but it had a 2½-inch thick roof on both ships.

Construction
RUSSIAN BATTLESHIP Imperator Aleksandr II (Император Александр II) was named after the Emperor Alexander II of Russia. She was built by the New Admiralty Yard at Saint Petersburg. Laid down on 12 July 1885, she was launched on 13 July 1887, and completed in June 1891, although her trials lasted until the spring of 1892. Imperator Nikolai I (Император Николай I) was named after the Emperor Nicholas I of Russia. She was built by the Franco-Russian Works at Saint Petersburg. Construction began on 20 March 1886; she was launched on 1 June 1889, and completed in July 1891 although her trials lasted almost a year afterwards.

History
Imperator Aleksandr II served in the Baltic Fleet and represented Russia, along with the cruiser RUSSIAN CRUISER Rurik, at the opening of the Kiel Canal in June 1895. She ran aground in Vyborg Bay later that year, but suffered little damage. Joining the Mediterranean Squadron in August 1896, she supported Russian interests during the Cretan Revolt of 1897. Imperator Aleksandr II returned to Kronstadt in September 1901. She was reboilered in December 1903 and modified 1904–05 to serve as an artillery school ship with her secondary armament replaced by more modern guns. Her crew refused to suppress the mutinous garrison of Fort Konstantin defending Kronstadt in August 1906. She was assigned to the Artillery Training Detachment in 1907. During World War I, she was mainly based in Kronstadt where her crew was active in the revolutionary movement. She was renamed Zarya Svobody (Заря Свободы: Dawn of Freedom) in May 1917. Turned over to the Kronstadt port authority on 21 April 1921, Imperator Aleksandr II was sold for scrap on 22 August 1922. She was towed to Germany during the autumn of 1922, but was not stricken from the Navy List until 21 November 1925.

According to Robert Gardiner in Conway's All the World's Fighting Ships 1860–1905, Imperator Aleksandr II was reconstructed in France between 1902 and 1904, with her torpedo tubes removed and her six and nine-inch guns exchanged for five 8 in 45-caliber guns and eight six-inch 45-caliber guns. Her revolver cannon were also exchanged for ten three-pounder guns. V.V. Arbazov in Bronenoset︠s︡ Imperator Aleksandr II confirms that the torpedo tubes were removed and claims that she had her nine-inch guns replaced by five 8-inch, the fifth being placed at the stern, her old six-inch guns were exchanged for newer, more powerful models, and four 47 mm and four 120 mm guns were added on the upper deck, presumably replacing the old revolver cannon. However, this happened in Russia, not France.

Imperator Nikolai I sailed in June 1892 for New York City to participate in the celebration honoring the 400th anniversary of the discovery of America. She was assigned to the Mediterranean Squadron upon her return and visited Toulon in October 1893. Sailing for the Pacific Ocean during the First Sino-Japanese War and arrived at Nagasaki, Japan on 28 April 1895, she remained in the Pacific until late 1896, when she returned to the Mediterranean Squadron and supported Russian interests during the Cretan Revolt. After returning to the Baltic in April 1898, Imperator Nikolai I was extensively refitted in 1899–1901 and received new engines and boilers. She returned to the Mediterranean in September 1901 and remained there for the next three years. Refitted in late 1904 during the Russo-Japanese War, she served as the flagship of the Third Pacific Squadron under Rear Admiral Nikolai Nebogatov and departed Liepāja on 15 January 1905 for the Pacific. She was slightly damaged during the Battle of Tsushima, receiving one hit from a 12-inch gun, two from eight-inch guns and two from six-inch guns, and suffered only 5 killed and 35 men wounded. She was surrendered, along with most of the Third Pacific Squadron, by Admiral Nebogatov the following day and was taken into the Imperial Japanese Navy as the 'Iki. After serving as a gunnery training ship until 1910, Imperator Nikolai I became a first-class coast defense ship and a training vessel. She was stricken on 1 May 1915 and sunk as a target by the battlecruisers JAPANESE BATTLESHIP Kongō and JAPANESE BATTLESHIP Hiei, although Watts and Gordon in The Imperial Japanese Navy claim that she was scrapped in 1922.