British E class submarine

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HMS E4
HMS E4
E-class
RN Ensign
General Characteristics
Displacement:
Group Surfaced Submerged
1 652 tons 795 tons
2/3 662 tons 807 tons
Length:
Group
1 53.65 m
2/3 54.86 m
Beam: 6.86 m
Draught:
Group
1 3.68 m
2/3 3.81 m
Propulsion: Twin-shift, 2 x 1,600 bhp Vickers diesel,
2 x 840 shp electric motors
Speed:
Surfaced Submerged
15.25 knots 9.75 knots
Range: 325 nm surfaced, 24 days endurance
Complement: 3 officers, 28 ratings
Armament:
Group Torpedoes Guns
1 1 x 18" bow tube
2 x 18" beam tubes
1 x 18" stern tube
8 torpedoes
1 x 12pdr deck gun
2/3 2 x 18" bow tube
2 x 18" beam tubes
1 x 18" stern tube
10 torpedoes
1 x 12 pdr deck gun

The Royal Navy's E-class of diesel/electric submarines were built between 1912 and 1916 and were the mainstay of the submarine fleet during the First World War. A total of 58 boats were built, including two constructed for the Royal Australian Navy.

The boats were built in three groups. Six boats of Group 3 were built as minelayers which were fitted with 20 vertical tubes instead of the two beam tubes.

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