HMS E21

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Career
Name: HMS E21
Builder: Vickers, Barrow
Laid down: 29 July 1915
Commissioned: 1 October 1915
Fate: Sold, 14 December 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 × 1,600 hp (1,193 kW) diesel
2 × 840 hp (626 kW) electric
2 screws
Speed: 15 knots (28 km/h; 17 mph) surfaced
10 knots (19 km/h; 12 mph) submerged
Range: 3,000 nmi (5,600 km) at 10 kn (19 km/h; 12 mph) surfaced
65 nmi (120 km) at 5 kn (9.3 km/h; 5.8 mph) submerged
Complement: 30
Armament: • 5 × 18 in (457 mm) torpedo tubes (2 bow, 2 beam, 1 stern)
• 1 × 12-pounder gun

HMS E21 was a British E class submarine built by Vickers, Barrow-in-Furness. She was laid down on 29 July 1915 and was commissioned on 1 October 1915.

HMS E21 was sold on 14 December 1921.

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