The early British E-class submarines, from E1 to E8, had a displacement of 652 long tons (662 t) at the surface and 795 long tons (808 t) while submerged. They had a length overall of 180 feet (55 m) and a beam of 22 feet 8.5 inches (6.922 m), and were powered by two 800 horsepower (600 kW) Vickers eight-cylinder two-stroke diesel engines and two 420 horsepower (310 kW) electric motors.[1][2] The class had a maximum surface speed of 16 knots (30 km/h; 18 mph) and a submerged speed of 10 knots (19 km/h; 12 mph), with a fuel capacity of 50 long tons (51 t) of diesel affording a range of 3,225 miles (5,190 km; 2,802 nmi) when travelling at 10 knots (19 km/h; 12 mph), while submerged they had a range of 85 miles (137 km; 74 nmi) at 5 knots (9.3 km/h; 5.8 mph).[1]
The early 'Group 1' E class boats were armed with four 18 inch (450 mm)torpedo tubes, one in the bow, one either side amidships, and one in the stern; a total of eight torpedoes were carried. Group 1 boats were not fitted with a deck gun during construction, but those involved in the Dardanelles campaign had guns mounted forward of the conning tower while at Malta Dockyard.[1]
E-Class submarines had wireless systems with 1 kilowatt (1.3 hp) power ratings; in some submarines, these were later upgraded to 3 kilowatts (4.0 hp) systems by removing a midship torpedo tube. Their maximum design depth was 100 feet (30 m) although in service some reached depths of below 200 feet (61 m).[1]
E7 took part in the Second Heligoland Bight Patrol along with E5, D2 and D3. She and the other submarines returned from the patrol on 18 August 1914. Then on 30 June 1915, E7 began a 24-day patrol in the Sea of Marmara. She succeeded in sinking 13 ships and damaging many more.
The U-boat′s commander, Oberleutnant zur SeeHeino von Heimburg, and UB-14's cook, a man by the name of Herzig, set out in a rowboat to observe the Ottoman attempts to destroy E7. After several mines that formed part of the net had been detonated to no avail,[Note 1] von Heimburg and his group rowed out and repeatedly dropped a plumb line until it contacted metal. Then, von Heimburg dropped an Ottoman sinker mine with a shortened fuse right on top of E7.[4] After the hand-dropped mine detonated too close for the British submarine's captain's comfort, he ordered his boat surfaced, abandoned, and scuttled. Between shellfire from the Ottoman shore batteries and E7′s scuttling charges, von Heimburg and company narrowly escaped harm.[5] While most sources credit E7′s sinking to the Ottoman efforts, author Robert Stern contends that von Heimburg and UB-14 deserve partial credit for the demise of E7.[6]
Notesedit
^The type of net in use had electric contact mines that were triggered from the shore. See: Stern: p. 29.
Citationsedit
^ abcdeAkerman, P. (1989). Encyclopaedia of British submarines 1901–1955. p.150. Maritime Books. ISBN1-904381-05-7
^. Chatham Submarines. Archived from the original on 13 August 2015. Retrieved 20 August 2015.
^Position and Movements, H.M. Ships, War Vessels and Aircraft, British and Foreign, Parts I. and II., August 1914. London: Admiralty Records. 1914.
Hutchinson, Robert (2001). Jane's submarines : war beneath the waves from 1776 to the present day. London: HarperCollins. ISBN978-0007105588.
Preston, Antony (2001). The Royal Navy submarine service : a centennial history. London: Conway Maritime. ISBN978-0851778914..
Stern, Robert Cecil (2007). The Hunter Hunted: Submarine Versus Submarine: Encounters from World War I to the Present. Annapolis, Maryland: Naval Institute Press. ISBN978-1-59114-379-6.
External linksedit
'Submarine losses 1904 to present day' - Royal Navy Submarine Museum 25 September 2015 at the Wayback Machine
January 01, 1970
british, class, submarine, built, chatham, dockyard, laid, down, march, 1912, commissioned, march, 1914, cost, history, united, kingdom, namee7, builderhm, dockyard, chatham, cost, laid, down30, march, 1912, launched2, october, 1913, commissioned16, march, 191. HMS E7 was a British E class submarine built at Chatham Dockyard She was laid down on 30 March 1912 and was commissioned on 16 March 1914 She cost 105 700 History United Kingdom NameE7 BuilderHM Dockyard Chatham Cost 105 700 Laid down30 March 1912 Launched2 October 1913 Commissioned16 March 1914 FateScuttled 4 September 1915 General characteristics Class and typeE class submarine Displacement652 long tons 662 t surfaced 795 long tons 808 t submerged Length178 ft 54 m Beam15 ft 5 in 4 70 m Propulsion2 800 hp 597 kW diesel 2 480 hp 358 kW electric 2 screws Speed15 knots 28 km h 17 mph surfaced 9 5 knots 17 6 km h 10 9 mph submerged Range3 000 nmi 5 600 km at 10 kn 19 km h 12 mph 65 nmi 120 km at 5 kn 9 3 km h 5 8 mph Complement31 Armament4 18 inch 450 mm torpedo tubes 1 bow 2 beam 1 stern Contents 1 Design 2 Crew 3 Service history 4 Notes 5 Citations 6 References 7 External linksDesign editThe early British E class submarines from E1 to E8 had a displacement of 652 long tons 662 t at the surface and 795 long tons 808 t while submerged They had a length overall of 180 feet 55 m and a beam of 22 feet 8 5 inches 6 922 m and were powered by two 800 horsepower 600 kW Vickers eight cylinder two stroke diesel engines and two 420 horsepower 310 kW electric motors 1 2 The class had a maximum surface speed of 16 knots 30 km h 18 mph and a submerged speed of 10 knots 19 km h 12 mph with a fuel capacity of 50 long tons 51 t of diesel affording a range of 3 225 miles 5 190 km 2 802 nmi when travelling at 10 knots 19 km h 12 mph while submerged they had a range of 85 miles 137 km 74 nmi at 5 knots 9 3 km h 5 8 mph 1 The early Group 1 E class boats were armed with four 18 inch 450 mm torpedo tubes one in the bow one either side amidships and one in the stern a total of eight torpedoes were carried Group 1 boats were not fitted with a deck gun during construction but those involved in the Dardanelles campaign had guns mounted forward of the conning tower while at Malta Dockyard 1 E Class submarines had wireless systems with 1 kilowatt 1 3 hp power ratings in some submarines these were later upgraded to 3 kilowatts 4 0 hp systems by removing a midship torpedo tube Their maximum design depth was 100 feet 30 m although in service some reached depths of below 200 feet 61 m 1 Crew editHer complement was three officers and 28 men 1 Service history editWhen war was declared with Germany on 5 August 1914 E7 was based at Harwich in the 8th Submarine Flotilla of the Home Fleets 3 E7 took part in the Second Heligoland Bight Patrol along with E5 D2 and D3 She and the other submarines returned from the patrol on 18 August 1914 Then on 30 June 1915 E7 began a 24 day patrol in the Sea of Marmara She succeeded in sinking 13 ships and damaging many more The German Submarine UB 14 was in port of Chanak to await repairs While there on 4 September word came that E7 was entangled in Ottoman antisubmarine nets off Nagara Point which the Ottoman battleship Turgut Reis had laid The U boat s commander Oberleutnant zur See Heino von Heimburg and UB 14 s cook a man by the name of Herzig set out in a rowboat to observe the Ottoman attempts to destroy E7 After several mines that formed part of the net had been detonated to no avail Note 1 von Heimburg and his group rowed out and repeatedly dropped a plumb line until it contacted metal Then von Heimburg dropped an Ottoman sinker mine with a shortened fuse right on top of E7 4 After the hand dropped mine detonated too close for the British submarine s captain s comfort he ordered his boat surfaced abandoned and scuttled Between shellfire from the Ottoman shore batteries and E7 s scuttling charges von Heimburg and company narrowly escaped harm 5 While most sources credit E7 s sinking to the Ottoman efforts author Robert Stern contends that von Heimburg and UB 14 deserve partial credit for the demise of E7 6 Notes edit The type of net in use had electric contact mines that were triggered from the shore See Stern p 29 Citations edit a b c d e Akerman P 1989 Encyclopaedia of British submarines 1901 1955 p 150 Maritime Books ISBN 1 904381 05 7 E Class Chatham Submarines Archived from the original on 13 August 2015 Retrieved 20 August 2015 Position and Movements H M Ships War Vessels and Aircraft British and Foreign Parts I and II August 1914 London Admiralty Records 1914 Stern pp 29 30 Stern p 30 Stern p 38 References editHutchinson Robert 2001 Jane s submarines war beneath the waves from 1776 to the present day London HarperCollins ISBN 978 0007105588 Preston Antony 2001 The Royal Navy submarine service a centennial history London Conway Maritime ISBN 978 0851778914 Stern Robert Cecil 2007 The Hunter Hunted Submarine Versus Submarine Encounters from World War I to the Present Annapolis Maryland Naval Institute Press ISBN 978 1 59114 379 6 nbsp External links edit Submarine losses 1904 to present day Royal Navy Submarine Museum Archived 25 September 2015 at the Wayback Machine Retrieved from https en wikipedia org w index php title HMS E7 amp oldid 1197836749, wikipedia, wiki, book, books, library,
