SM U-41 or U-XLI was a U-27 class U-boat or submarine for the Austro-Hungarian Navy. U-41, built by the Austrian firm of Cantiere Navale Triestino (CNT) at the Pola Navy Yard, was launched in November 1917. When she was commissioned in February 1918, she became the last boat of her class to enter service. She was also the last domestically constructed Austro-Hungarian U-boat to enter service.

She had a single hull just over in length. She displaced when surfaced and over when submerged. Her two diesel engines moved her at up to on the surface, while her twin electric motors propelled her at up to while underwater. She was armed with two bow torpedo tubes and could carry a load of up to four torpedoes. She was also equipped with a deck gun and a machine gun.

During a short service career marred by repeated engine breakdowns, U-41 sank one ship, the French steamer Amiral Charner of . U-41 was at Cattaro at war's end, and was ceded to France as a war reparation in 1920. She was towed to Bizerta and broken up within a year.

Design and construction Austria-Hungary's U-boat fleet was largely obsolete at the outbreak of World War I.Gardiner, p. 341. The Austro-Hungarian Navy satisfied its most urgent needs by purchasing five Type UB I submarines that comprised the from Germany,Gardiner, p. 343. by raising and recommissioning the sunken as , had been caught in an anti-submarine net while trying to enter the harbor at Pola on 20 December 1914. See: Gardiner, p. 343. and by building four submarines of the that were based on the 1911 Danish Havmanden class.Gardiner, p. 344.The plans for the Danish Havmanden class submarines, three of which were built in Austria-Hungary, were seized from Whitehead & Co. in Fiume. See: Gardiner, pp. 344, 354.

Once these steps had alleviated their most urgent needs, the Austro-Hungarian Navy selected the German Type UB II design for its newest submarines in mid 1915.Halpern, p. 383. The Germans were reluctant to allocate any of their wartime resources to Austro-Hungarian construction, but were willing to sell plans for up to six of the UB II boats to be constructed under license in Austria-Hungary. The Navy agreed to the proposal and purchased the plans from AG Weser of Bremen,Baumgartner and Sieche, as excerpted here (reprinted and translated into English by Sieche). Retrieved 1 December 2008. one of the two German shipyards building UB II submarines.Tarrant, p. 172.

U-41 displaced surfaced and submerged. She had a single hull with saddle tanks,Gardiner, p. 181. and was planned to be long with a beam of and a draft of . For propulsion, she had two shafts, twin diesel engines of for surface running, and twin electric motors of for submerged travel. She was capable of while surfaced and while submerged. Although there is no specific notation of a range for U-41 in Conway's All the World's Fighting Ships 1906–1921, the German UB II boats, upon which the U-27 class was based, had a range of over at surfaced, and at submerged. U-27-class boats were designed for a crew of 23–24.

U-41 was armed with two bow torpedo tubes and could carry a complement of four torpedoes. She was also equipped with a 75 mm/26 (3.0 in) deck gun and an machine gun.

U-41 was ordered from Cantiere Navale Triestino (CNT) as a replacement for (which had been sunk in May 1916). She was laid down on 23 February 1917 at the Pola Navy Yard.By this time, the CNT shipyards at Monfalcone had been overrun by the Italian Army. See: Baumgartner and Sieche, as excerpted here (reprinted and translated into English by Sieche). Retrieved 21 January 2008. During construction, U-41 was lengthened by nearly to accommodate diesel engines that had been ordered for U-6 before her loss. U-41 was launched on 11 November.

Service career On 19 February 1918, SM U-41 was commissioned into the Austro-Hungarian Navy under the command of Linienschiffsleutnant Edgar Wolf. Previously in command of for a week in April 1915, the 28-year-old Wolf was a native of Fiume (present-day Rijeka, Croatia). When she entered service, U-41 was the last boat of her class to do so. She was also the last domestically constructed U-boat completed and commissioned into the Austro-Hungarian Navy.Baumgartner and Sieche, as excerpted here (reprinted and translated into English by Sieche). Retrieved 21 January 2009. Wolf and U-41 departed Pola on 17 March for a patrol in the Mediterranean. On 30 March, Wolf attempted to torpedo a steamer off the coast of Africa, but missed his target. Three days later, the left diesel engine failed and Wolf steered his boat back to port, arriving at Cattaro on 5 April. U-41 sailed for Pola on 9 April and, completing the journey two days later, underwent repairs over the next six weeks. While conducting a diving trial out of Pola on 25 May, the boat sprang a leak at the depth of . She returned to Pola and underwent more extensive repairs, remaining there until August.

After making way to the submarine base at Brioni, U-41 set out on another patrol into the Mediterranean on 29 August, but put into Šibenik the next day for engine repairs. Resuming her patrol after a day's delay, U-41 reached her patrol area east of Malta. Wolf and U-41 scored their first success on 13 September, when they torpedoed and sank the steamer Amiral Charner west of Pantellaria. The French ship was carrying horses and a general cargo from Marseille for Salonika when she was attacked. Six were killed in the attack on the French ship.Gibson and Prendergast, p. 273. On 26 September, U-41 attacked another steamer west of Kefalonia, but was apparently unsuccessful.Uboat.net reports no ships sunk in the Mediterranean on 26 September 1918. See: U-41 ended her patrol at Cattaro on 28 September.

On October 6, Wolf and U-41 set out from Cattaro to patrol off Durazzo and the Albanian coast. After nine days without success, the boat returned to Cattaro, and remained there through the end of the war.Gibson and Prendergast, pp. 388–89. On 1 November, U-41 was taken over by a British commission, who controlled the vessel until she was ceded to France as a war reparation in 1920. U-41 and sister boats and were towed to Bizerta. U-29 foundered en route, but U-31 and U-41 reached their destination and were scrapped within the next year.

Summary of raiding history +Ships sunk or damaged by SM U-41DateNameNationalityTonnageFate13 September 1918Amiral Charner4,604Sunk Sunk:Total:4,6044,604

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