HMS E21
| History | |
|---|---|
 United Kingdom | |
| Name | E21 |
| Builder | Vickers, Barrow |
| Launched | 24 July 1915 |
| Commissioned | 1 October 1915 |
| Fate | Sold, 14 December 1921 |
| General characteristics | |
| Class & type | E-classsubmarine |
| Displacement |
|
| Length | 181 ft (55 m) |
| Beam | 15 ft (4.6 m) |
| Propulsion |
|
| Speed |
|
| Range |
|
| Complement | 3 officers, 28 ratings |
| Armament |
|
HMS E21 was a British E class submarine built by Vickers, Barrow-in-Furness. She was launched on 24 July 1915 and commissioned on 1 October 1915. E21 was sold on 14 December 1921.
Design
Like all post-E8British E-class submarines, E21 had a displacement of 662 long tons (673 t) at the surface and 807 long tons (820 t) while submerged. She had a total length of 180 feet (55 m)[1] and a beam of 22 feet 8.5 inches (6.922 m). She was powered by two 800 horsepower (600 kW) Vickers eight-cylinder two-stroke diesel engines and two 420 horsepower (310 kW) electric motors.[2][3] The submarine 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). British E-class submarines had fuel capacities of 50 long tons (51 t) of diesel and ranges of 3,255 miles (5,238 km; 2,829 nmi) when travelling at 10 knots (19 km/h; 12 mph).[1]E21 was capable of operating submerged for five hours when travelling at 5 knots (9.3 km/h; 5.8 mph).
E21 was armed with a 12-pounder QF gun mounted forward of the conning tower. She had five 18 inch (450 mm)torpedo tubes, two in the bow, one either side amidships, and one in the stern; a total of 10 torpedoes were carried.[2]
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). Some submarines contained Fessenden oscillator systems.[1]
Crew
Her complement was three officers and 28 men.[1]
References
- ^ abcdInnes McCartney; Tony Bryan (20 February 2013). British Submarines of World War I. Osprey Publishing. pp. 11–12. ISBN 978-1-4728-0035-0.
- ^ abAkerman, 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.
Bibliography
- Hutchinson, Robert (2001). Jane's Submarines: War Beneath the Waves from 1776 to the Present Say. London: HarperCollins. ISBN 978-0-00-710558-8. OCLC 53783010.
 Royal Navy | |
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 Royal Australian Navy | |
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