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British E class submarine

HMS E4
Class overview
Builders:
Operators:
Preceded by: British D class submarine
Succeeded by: British L class submarine
Completed: 58
General characteristics
Displacement:
  • Group 1:
    • Surfaced: 665 tons
    • Submerged: 796 tons
  • Group 2:
    • Surfaced: 667 tons
    • Submerged: 807 tons
  • Group 3:
    • Surfaced: 662 tons
    • Submerged: 807 tons
  • Australian Boats:
    • Surfaced: 664 tons
    • Submerged: 780 tons
Length:
  • Group 1: 178 ft (54 m)
  • Group 2+3: 181 ft (55 m)
  • Australian boats: 176 ft (54 m)
Beam: All Groups: 15.05 ft (4.59 m)
Propulsion:
  • Group 1+ Australian Boats:
    • 2 × 800 hp Vickers diesel
    • 2 × 600 hp electric
    • 2 screws
  • Group 2+3:
    • 2 × 800 hp Vickers diesel
    • 2 × 840 hp electric
    • 2 screws
Speed:
  • Group 1:
    • Surfaced: 15 knots (28 km/h)
    • Submerged: 9.5 knots (17.6 km/h)
  • Group 2:
    • Surfaced: 15.25 knots (28.24 km/h)
    • Submerged: 10.25 knots (18.98 km/h)
  • Group 3 and Australian boats:
    • Surfaced: 15 knots (28 km/h)
    • Submerged: 10 knots (19 km/h)
Range:
  • All groups:
    • Surfaced: 3000 nmi at 10 knots
    • Submerged: 65 nmi at 5 knots
Complement: All groups: 30
Armament:

The British E class submarines started out as improved versions of the British D class submarine. The E class served with the Royal Navy throughout World War I as the backbone of the submarine fleet. The last surviving E class submarines were withdrawn from service by 1922.

All of the first group and some of the second group of the class were completed before the outbreak of World War I. The group 1 boats cost £101,900 per hull. As submarine technology improved, the E class went through several design modifications. The group 2 boats cost £105,700 per hull. The Group 3 boats, the last group, incorporated all improvements.

The class primarily served in the North Sea and the Baltic, while some served with Russian ships in Russian coastal waters before being their crews scuttled them to avoid having them fall into the hands of the communists, who were gradually taking control of Russia. Additionally, some of the submarines operated against the Turks.

The British L class submarine eventually replaced the E class.


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