German Type U 87 submarines were preceded by the shorter Type U 81 submarines. U-91 had a displacement of 757 tonnes (745 long tons) when at the surface and 998 tonnes (982 long tons) while submerged.[1] She had a total length of 65.80 m (215 ft 11 in), a pressure hull length of 50.07 m (164 ft 3 in), a beam of 6.20 m (20 ft 4 in), a height of 9.35 m (30 ft 8 in), and a draught of 3.88 m (12 ft 9 in). The submarine was powered by two 2,400 metric horsepower (1,800 kW; 2,400 shp) engines for use while surfaced, and two 1,200 metric horsepower (880 kW; 1,200 shp) engines for use while submerged. She had two propeller shafts. She was capable of operating at depths of up to 50 metres (160 ft).[1]
The submarine had a maximum surface speed of 15.6 knots (28.9 km/h; 18.0 mph) and a maximum submerged speed of 8.6 knots (15.9 km/h; 9.9 mph).[1] When submerged, she could operate for 56 nautical miles (104 km; 64 mi) at 5 knots (9.3 km/h; 5.8 mph); when surfaced, she could travel 11,380 nautical miles (21,080 km; 13,100 mi) at 8 knots (15 km/h; 9.2 mph). U-91 was fitted with four 50 centimetres (20 in) torpedo tubes (two at the bow and two at the stern), ten to twelve torpedoes, one 10.5 cm (4.1 in) SK L/45 deck gun, and one 8.8 cm (3.5 in) SK L/30 deck gun. She had a complement of thirty-six (thirty-two crew members and four officers).[1]
^Helgason, Guðmundur. "WWI U-boat commanders: Alfred von Glasenapp (Royal House Order of Hohenzollern)". German and Austrian U-boats of World War I - Kaiserliche Marine - Uboat.net. Retrieved 21 January 2015.
^Helgason, Guðmundur. "WWI U-boats: U 91". German and Austrian U-boats of World War I - Kaiserliche Marine - Uboat.net. Retrieved 25 January 2010.
^Helgason, Guðmundur. "Ships hit by U 91". German and Austrian U-boats of World War I - Kaiserliche Marine - Uboat.net. Retrieved 21 January 2015.
Bibliographyedit
Gröner, Erich; Jung, Dieter; Maass, Martin (1991). U-boats and Mine Warfare Vessels. German Warships 1815–1945. Vol. 2. Translated by Thomas, Keith; Magowan, Rachel. London: Conway Maritime Press. ISBN0-85177-593-4.
December 02, 2023
other, ships, with, same, name, german, submarine, note, submarines, serving, imperial, german, navy, world, engaged, naval, warfare, took, part, first, battle, atlantic, historygerman, empirenameu, 91ordered23, june, 1915builderkaiserliche, werft, danzigyard,. For other ships with the same name see German submarine U 91 SM U 91 Note 1 was one of the 329 submarines serving in the Imperial German Navy in World War I U 91 was engaged in the naval warfare and took part in the First Battle of the Atlantic 3 HistoryGerman EmpireNameU 91Ordered23 June 1915BuilderKaiserliche Werft DanzigYard number35Laid down1 August 1916Launched14 April 1917Commissioned17 September 1917FateSurrendered to France 26 November 1918 Broken Up at Brest July 1921General characteristics 1 Class and typeGerman Type U 87 submarineDisplacement757 t 745 long tons surfaced 998 t 982 long tons submergedLength65 80 m 215 ft 11 in o a 50 07 m 164 ft 3 in pressure hull Beam6 20 m 20 ft 4 in oa 4 18 m 13 ft 9 in pressure hull Height9 35 m 30 ft 8 in Draught3 88 m 12 ft 9 in Installed power2 2 400 PS 1 765 kW 2 367 shp surfaced 2 1 200 PS 883 kW 1 184 shp submergedPropulsion2 shafts 2 1 66 m 5 ft 5 in propellersSpeed16 8 knots 31 1 km h 19 3 mph surfaced 9 1 knots 16 9 km h 10 5 mph submergedRange11 380 nmi 21 080 km 13 100 mi at 8 knots 15 km h 9 2 mph surfaced 56 nmi 104 km 64 mi at 5 knots 9 3 km h 5 8 mph submergedTest depth50 m 160 ft Complement4 officers 32 enlistedArmament4 50 cm 19 7 in torpedo tubes two bow two stern 10 12 torpedoes 1 10 5 cm 4 1 in SK L 45 deck gunService recordPart of III Flotilla 13 December 1917 11 November 1918Commanders Kptlt Alfred von Glasenapp 2 17 September 1917 11 November 1918Operations 8 patrolsVictories 37 merchant ships sunk 83 302 GRT 2 merchant ships damaged 11 821 GRT Contents 1 Design 2 Summary of raiding history 3 References 3 1 Notes 3 2 Citations 4 BibliographyDesign editGerman Type U 87 submarines were preceded by the shorter Type U 81 submarines U 91 had a displacement of 757 tonnes 745 long tons when at the surface and 998 tonnes 982 long tons while submerged 1 She had a total length of 65 80 m 215 ft 11 in a pressure hull length of 50 07 m 164 ft 3 in a beam of 6 20 m 20 ft 4 in a height of 9 35 m 30 ft 8 in and a draught of 3 88 m 12 ft 9 in The submarine was powered by two 2 400 metric horsepower 1 800 kW 2 400 shp engines for use while surfaced and two 1 200 metric horsepower 880 kW 1 200 shp engines for use while submerged She had two propeller shafts She was capable of operating at depths of up to 50 metres 160 ft 1 The submarine had a maximum surface speed of 15 6 knots 28 9 km h 18 0 mph and a maximum submerged speed of 8 6 knots 15 9 km h 9 9 mph 1 When submerged she could operate for 56 nautical miles 104 km 64 mi at 5 knots 9 3 km h 5 8 mph when surfaced she could travel 11 380 nautical miles 21 080 km 13 100 mi at 8 knots 15 km h 9 2 mph U 91 was fitted with four 50 centimetres 20 in torpedo tubes two at the bow and two at the stern ten to twelve torpedoes one 10 5 cm 4 1 in SK L 45 deck gun and one 8 8 cm 3 5 in SK L 30 deck gun She had a complement of thirty six thirty two crew members and four officers 1 Summary of raiding history editDate Name Nationality Tonnage Note 2 Fate 4 24 December 1917 Elmleaf nbsp United Kingdom 5 948 Damaged28 December 1917 Robert Eggleton nbsp United Kingdom 2 274 Sunk2 January 1918 Boston City nbsp United Kingdom 2 711 Sunk4 January 1918 Otto nbsp United Kingdom 139 Sunk5 January 1918 Knightsgarth nbsp United Kingdom 2 889 Sunk7 January 1918 Premier nbsp United Kingdom 89 Sunk19 February 1918 Beacon Light nbsp United Kingdom 2 768 Sunk22 February 1918 Haileybury nbsp United Kingdom 2 888 Sunk23 February 1918 Birchleaf nbsp United Kingdom 5 873 Damaged23 February 1918 British Viscount nbsp United Kingdom 3 287 Sunk24 February 1918 Renfrew nbsp United Kingdom 3 830 Sunk2 March 1918 Bessy nbsp United Kingdom 60 Sunk20 April 1918 Florrieston nbsp United Kingdom 3 366 Sunk21 April 1918 Landonia nbsp United Kingdom 2 504 Sunk21 April 1918 Normandiet nbsp United Kingdom 1 843 Sunk22 April 1918 Baron Herries nbsp United Kingdom 1 610 Sunk26 April 1918 Ethel nbsp United Kingdom 100 Sunk27 April 1918 Gresham nbsp United Kingdom 3 774 Sunk27 April 1918 Walpas nbsp Russia 312 Sunk28 April 1918 Damao nbsp Portugal 5 668 Sunk28 April 1918 Oronsa nbsp United Kingdom 8 075 Sunk28 April 1918 Raymond nbsp France 109 Sunk1 July 1918 Westmoor nbsp United Kingdom 4 329 Sunk6 July 1918 Port Hardy nbsp United Kingdom 6 533 Sunk9 July 1918 Silvia nbsp Italy 3 571 Sunk13 July 1918 Badagri nbsp United Kingdom 2 956 Sunk16 July 1918 Fisherman nbsp United Kingdom 136 Sunk25 July 1918 Tippecanoe nbsp United States 6 187 Sunk1 October 1918 Therese et Marthe nbsp France 32 Sunk2 October 1918 Maia nbsp France 185 Sunk2 October 1918 Marie Emmanuel nbsp France 32 Sunk2 October 1918 Ave Maris Stella nbsp France 22 Sunk4 October 1918 Mercedes nbsp Spain 2 164 Sunk5 October 1918 Heathpark nbsp United Kingdom 2 205 Sunk5 October 1918 Erindring nbsp United Kingdom 1 229 Sunk8 October 1918 Cazengo nbsp Portugal 3 009 Sunk9 October 1918 Pierre nbsp France 354 Sunk11 October 1918 Luksefjell nbsp Norway 2 007 Sunk14 October 1918 Bayard nbsp France 55 SunkReferences editNotes edit SM stands for Seiner Majestat English His Majesty s and combined with the U for Unterseeboot would be translated as His Majesty s Submarine Tonnages are in gross register tons Citations edit a b c d e Groner 1991 pp 12 14 Helgason Gudmundur WWI U boat commanders Alfred von Glasenapp Royal House Order of Hohenzollern German and Austrian U boats of World War I Kaiserliche Marine Uboat net Retrieved 21 January 2015 Helgason Gudmundur WWI U boats U 91 German and Austrian U boats of World War I Kaiserliche Marine Uboat net Retrieved 25 January 2010 Helgason Gudmundur Ships hit by U 91 German and Austrian U boats of World War I Kaiserliche Marine Uboat net Retrieved 21 January 2015 Bibliography editGroner Erich Jung Dieter Maass Martin 1991 U boats and Mine Warfare Vessels German Warships 1815 1945 Vol 2 Translated by Thomas Keith Magowan Rachel London Conway Maritime Press ISBN 0 85177 593 4 Retrieved from https en wikipedia org w index php title SM U 91 amp oldid 1172013399, wikipedia, wiki, book, books, library,
