SMS Arminius
SMS   was an ironclad warship of the Prussian Navy, later the Imperial German Navy. The vessel was a turret ship that was designed by the British Royal Navy Captain Cowper Coles and built by the Samuda Brothers shipyard in Cubitt Town, London as a speculative effort; Prussia purchased the ship during the Second Schleswig War against Denmark, though the vessel was not delivered until after the war. The ship was armed with four  guns in a pair of revolving gun turrets amidships. She was named for Arminius, the victor of the Battle of the Teutoburg Forest. served as a coastal defense ship for the first six years of her service with the Prussian Navy. She saw extensive service in the Austro-Prussian and Franco-Prussian wars during the process of German unification. The vessel was the primary challenge to the French blockade of German ports during the latter conflict. After the wars,  was withdrawn from front-line service and used in a variety of secondary roles, including as a training ship for engine-room crews and as a tender for the school ship . The ship was eventually sold in 1901 and broken up for scrap the following year. Design 
The warship that came to be SMS  was designed by Captain Cowper Coles, a British Royal Navy officer and advocate of turret-armed ironclad warships. was nearly identical to the Danish ironclad , also designed by Coles. General characteristics and machinery 

 was  long at the waterline and  long overall. The ship had a beam of  and a draft of  forward and  aft. She was designed to displace  but at full load,  displaced up to . The vessel was constructed with transverse frames and constructed with an iron hull, which contained eight watertight compartments. As was common for warships of the period, she was fitted with a ram bow. The ship's crew consisted of ten officers and 122 enlisted men. She carried a number of smaller boats, including two pinnaces, two cutters, and one dinghy. was not a particularly successful design; she suffered from severe, fast rolling, especially in heavier seas. She also shipped a great deal of water over the bow and was unbalanced in steering. The ship turned rapidly to starboard but was sluggish in turning to port. The ship was required to have the rudder at 15 degrees to port in order to remain on a straight course. It was also impossible to control the ship with only sail power. The ship was powered by a single two-cylinder single-expansion steam engine built by J. Penn & Sons, Greenwich. The engine drove a single two-bladed screw propeller that was  in diameter. Four coal fired, transverse trunk boilers, each of which had four fireboxes apiece, supplied steam to the engine. The boilers were also built by J Penn & Sons, Greenwich, and were arranged in a single boiler room. Limited electrical power was provided by a single generator, which supplied 1.9 kilowatts at 55 volts. The ship was equipped with a schooner rig with a surface area of 540 square meters. The propulsion system was rated at  and a top speed of , though on trials,  reached  and . The ship carried  of coal, which enabled a range of  at a cruising speed of . Armament and armor 

As built,  was equipped with a main battery of four rifled, bronze 72-pounder cannon, but after delivery to the Prussian Navy they were replaced with four Krupp 21 cm RK L/19 of  caliber. These guns were supplied with a total of 332 rounds, and could elevate to 12 degrees. At maximum elevation, the guns could engage targets out to . After 1881, four machine guns were installed, along with a single  torpedo tube mounted in the bow above the waterline. s armor consisted of wrought iron backed with teak plating. The conning tower was protected by  of wrought iron on  of teak. The armored belt ranged in thickness from  of iron on the bow and stern to 114 mm amidships, the entire length of which was backed by 229 mm of teak. The two turrets were armored with 114 mm of iron on  of timber. Service history

Construction
She was built by the Samuda Brothers shipyard in London as a speculative project, possibly to sell to the Confederate Navy. The ship was laid down in 1863 and was launched on 20 August 1864. Prussia instead purchased the ship on 20 August 1864 for some 1,887,000 gold marks, paid in part through public donations. The Prussians had hoped to secure the vessel by September, but delivery was delayed by the British government over the Second Schleswig War between Prussia and Denmark. As the British were sympathetic to Denmark, they prevented the ship from being delivered until after the war was concluded. At her launching, she was christened  for the victor of the Battle of the Teutoburg Forest against the Romans in 9 CE; the name was chosen to evoke the common feeling of German unity at the time. Commissioning of the ship was delayed after the Prussian naval command decided to use the men who had been allocated to  to commission the new screw corvette  instead. This decision was in part made due to heavy ice in the Kieler Förde, which prevented  from entering the port until 4 April 1865.  arrived in London on 20 April with a second crew for , allowing her to be commissioned two days later. After entering service, the ship conducted initial sea trials, though her armament had not yet been fitted. On 3 May, she and  departed Britain. The two ships steamed across the North Sea, and after encountering severe storms, stopped at Skagen, Denmark, for shelter. They later stopped in Helsingør, Denmark, before arriving in Kiel on 15 May. She got underway on 1 June and steamed to Danzig, where she was decommissioned to have her guns installed. Along with the ironclad ram ,  was the first armored warship acquired by the Prussian Navy. Austro-Prussian War

She was reactivated in May 1866 under the command of  (KK—Corvette Captain) Reinhold von Werner, initially to have work done on her gun turrets, but this was delayed as tensions between Austria and Prussia increased. received her mobilization order on 12 May, instructing her to depart for Kiel, which was at that time under Austrian control. The Prussians hoped that her presence would intimidate the Austrian commander, Lieutenant Field Marshal Ludwig von Gablenz. She arrived there on 1 June and anchored off the city's coastal fortifications five days later. The next day,  was assigned to a squadron commanded by  (Rear Admiral) Eduard von Jachmann, which also included his flagship, the screw frigate . joined a flotilla of ships that was also being transferred from the Baltic Sea to join Jachmann's squadron in the North Sea; these included the aviso  and the gunboats , , and . Werner was placed in command of the unit and given the title of  (Commodore). The ships got underway on 12 June and passed through the Danish straits, the Skagerrak, and into the North Sea. The ships arrived in Hamburg, having covered a distance of some  in 100 hours, an impressive feat for an early ironclad warship. As the war had not yet started, the ships were first ordered to observe the movements of the Austrian Kalik Brigade in Holstein; the Prussians had learned from the Austrian military attache in Berlin that the unit had orders to retreat to Hannoverian territory, namely Wilhelmsburg and Harburg, in the event of war. Unrest broke out in Altona, prompting Werner to send a landing party of one officer and forty men ashore to secure the rail facility in the town. The Austro-Prussian War began on 14 June, and hostilities with Hannover began the following day. Without a naval threat from Austria, the Prussian navy therefore concentrated its effort against the Kingdom of Hanover. For the remainder of the conflict,  operated out of Geestemünde, under Werner's command, and the mere appearance of  caused several Hanoverian coastal batteries to surrender. On 15 June, , , and , covered the crossing of the Elbe river by General Edwin von Manteuffel and some 13,500 soldiers to attack the city of Hanover. The crossing took place in the span of ten hours, and Werner's flotilla later covered the crossing of additional forces to support Manteuffel, including cavalry and artillery units. , , and  sent men ashore at Brunshausen, where they spiked the guns of an abandoned coastal artillery battery. Werner then detached  and  to bombard the batteries at the mouth of the Elbe, while  was sent to attack the battery at Grauerort. entered the Elbe on 17 June, but heavy storms prevented her from intercepting a Norddeutscher Lloyd steamship that was carrying the Hannoverian gold reserves to Britain. The Prussian army, supported by Werner's flotilla, had succeeded in capturing all of the major fortifications guarding the Elbe, Weser, and Ems by 22 June, and other naval forces from the Baltic and Mediterranean Sea had arrived to further strengthen the Prussian fleet. and the other vessels thereafter patrolled the coast of Ostfriesland to show the flag. By the end of the month, the Prussian army had decisively defeated the Austrians at Königgrätz and ended the war. Following the signing of the peace treaty that formally ended the conflict, Werner's flotilla was disbanded on 23 August and  returned to Kiel. On 3 October, the , a monitor of the US Navy arrived in Kiel while on a promotional tour of European ports; she and  raced the next day, and the latter was two knots faster than the American vessel. was decommissioned on 20 October, and was only reactivated in 1867 for use as a gunnery training ship to support , since the latter lacked turret guns. In June, modernization work on the ship began in Kiel, but in September, she had to be sent to Karlskrona, Sweden, to be dry-docked and have her bottom cleaned. She returned to Germany in late November, where she was again decommissioned to allow work to resume. The overhaul included replacing her original rig with a lighter rigging with pole masts. A weather deck, which extended from just astern of the forward turret to her stern, was also fitted and ventilators for the hull were extended up through the new deck. In 1870, the ship had her sailing rig removed altogether, as it had been determined that she could not be steered while under sail, and the masts blocked the firing arcs of the gun turrets. Work on the ship was delayed by accidents during sea trials, and the ship was not ready for active service again until shortly before the conflict with France. Franco-Prussian War

At the outbreak of the Franco-Prussian War on 19 July 1870, the Prussian Navy concentrated  and the armored frigates , , and  in the North Sea naval base at Wilhelmshaven. received her mobilization order on the first day of the war, and at that point she was stationed in Kiel. She sortied on 27 July under the command of KK Otto Livonius to break through the French blockade by hugging the Swedish coast, which her shallow draft permitted. Her passage through Swedish territorial waters also protected the ship from French attack. The ship reached Cuxhaven on 30 July and proceeded to Wilhelmshaven on 1 August. Despite the great French naval superiority, the French had conducted insufficient pre-war planning for an assault on the Prussian naval installations, and concluded that it would only be possible with Danish assistance, which was not forthcoming. and the three armored frigates, under the command of now  (Vice Admiral) Jachmann, made an offensive sortie in early August 1870 out to the Dogger Bank, though they encountered no French warships. The three frigates thereafter suffered from chronic engine trouble, which left  alone to conduct operations. In the course of the war, she sortied from the port over forty times; these also failed to result in major combat, though she occasionally traded shots with the blockading French warships. She briefly engaged a French frigate on 24 August, but the latter quickly withdrew. For the majority of the war,  was stationed in the mouth of the Elbe along with the ironclad ram  and three small gunboats. The three armored frigates remained off the island of Wangerooge, where their crews attempted to repair their troublesome engines. On 11 September, the three frigates were again ready for action; they joined  for another major operation, though it too did not encounter French opposition. The French Navy had by this time returned to France. On 18 October,  collided with the aviso , though she was not seriously damaged in the accident, though  was badly holed below the waterline. On 23 December,  and the rest of the ships stationed in Wilhelmshaven entered the inner harbor of the port, the dredging of which had recently been completed; the outer Jade Bay had iced over, preventing further operations for the winter. Later career
Following the war, the now-German  (Imperial Navy) began to demobilize in early 1871. On 29 March 1871, Arminius, the screw frigate , and the aviso  departed Wilhelmshaven for the Baltic. Severe storms delayed their progress, and they reached Kiel on 4 April. Arminius was decommissioned there on 27 April. Beginning on 1 May 1872, the ship was used as a training vessel for naval engineers and boiler room personnel, under the command of KK Philipp von Kall. She also took part in shooting practice with the gunnery school, before being decommissioned again on 1 October. She resumed school ship duties from 16 April to 31 May 1873, from 17 March to mid-May 1874, and from 15 March to 31 May 1875, which was to be her final commissioning. The ship was thereafter decommissioned and placed in reserve. Her ram bow allowed her to be used as an icebreaker in the Baltic in the 1880s. She was activated for that purpose in May 1881 to assist in clearing paths for vessels in Kiel. In 1882, she was extensively overhauled and then used as a tender for the cadet training vessel  from August to November. In 1886 and again from January to July 1887, Arminius resumed her old training ship duties. Arminius was sent to the Flensburger Förde for icebreaking work from March to April 1888. The ship was rebuilt again later that year; during the refit the propulsion system was overhauled and replaced with German-built equipment and two searchlights were installed. Four machine guns were installed, along with a  torpedo tube. She was reclassified as a special purpose vessel on 10 October. She did not return to service, however, and was ultimately stricken from the naval register on 2 March 1901. Later that year, she was used in a weapons test with a new torpedo warhead, which caused considerable damage to the ship. She was thereafter sold to ship breakers for 72,000 gold marks in 1902, and was towed to Hamburg to be broken up that year. Footnotes

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Ironclad warships of the Imperial German Navy
1864 ships
Ships built in Cubitt Town
Ships of the Prussian Navy