Submarine of the Royal Navy
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|
| History |
|---|
 United Kingdom |
|---|
| Name | E12 |
| Builder | HM Dockyard, Chatham |
| Cost | £101,900 |
| Laid down | 16 December 1912 |
| Launched | 5 September 1914 |
| Commissioned | 14 October 1914 |
| Fate | Sold, 7 March 1921 |
| General characteristics |
|---|
| Class and type | E-class submarine |
| Displacement |
- 662 long tons (673 t) surfaced
- 807 long tons (820 t) submerged
|
| Length | 181 ft (55 m) |
| Beam | 15 ft (4.6 m) |
| Propulsion |
- 2 × 800 hp (597 kW) diesels
- 2 × 420 hp (313 kW) electric
- 2 screws
|
| Speed |
- 15.25 knots (28.24 km/h; 17.55 mph) surfaced
- 10.25 knots (18.98 km/h; 11.80 mph) submerged
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| Range |
- 3,000 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)
|
| Complement | 30 |
| Armament | |
HMS E12 was a British E class submarine built by HM Dockyard, Chatham. She was laid down on 16 December 1912 and commissioned on 14 October 1914. Her construction costs totalled £101,900.
During the Great War, anti-submarine nets in the Dardanelles entangled her forward hydroplanes, forcing her down to a depth of 245 feet. At the time, this was the greatest depth achieved by any British submarine.[citation needed] E12 managed to surface only to come under fire by shore batteries, but avoided further damage. She survived the war and was sold for scrap in Malta on 7 March 1921.[1]
Design
Like all post-E8 British E-class submarines, E12 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)[2] 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.[3][4] 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).[2] E12 was capable of operating submerged for five hours when travelling at 5 knots (9.3 km/h; 5.8 mph).
E12 was armed with a single 4-inch QF gun mounted forward of the conning tower, and 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.[3]
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.[2]
Crew
Her complement was three officers and 28 men.[2]
