WW1 BRITISH K CLASS SUBMARINE PLANS

BRITISH SUBMARINE HMS K4 AGROUND 1917

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CROSS SECTIONS DETAILS

PORT SIDE AND OVERHEAD DETAILS

STD SIDE AND SECTIONS DETAILS

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The K-class submarines were a class of steam-propelled submarines of the Royal Navy designed in 1913.

Of the 18 built none was lost through enemy action but six sank in accidents.

Only one ever engaged an enemy vessel, hitting a U-boat amidships though the torpedo failed to explode.

Most were scrapped between 1921 and 1926 but K26 survived until 1931.

K18, K19 and K20 became the new M-class submarines. K21, K23, K24, K25, K27 and K28 were cancelled.

General characteristics

Displacement:

1,980 tons surfaced
2,566 tons dived

Length: 339 ft (103 m)
Beam: 26 ft 6 in (8.08 m)
Draught: 20 ft 11 in (6.38 m)

Propulsion:

Twin 10,500 shp (7,800 kW) oil-fired Yarrow boilers each powering a Brown-Curtis or Parsons geared steam turbines.

Four 1,440 hp (1,070 kW) electric motors.

One 800 hp (600 kW) Vickers diesel generator for charging batteries on the surface.

Twin 3 blade 7 ft 6 in (2.29 m) screws.

Speed:

24 knots (44 km/h; 28 mph) surfaced
8 knots (15 km/h; 9.2 mph) submerged

Range:

Surface: 800 nautical miles (1,500 km; 920 mi) at maximum speed
12,500 nmi (23,200 km; 14,400 mi) at 10 kn (19 km/h; 12 mph)
Submerged: 8 nmi (15 km; 9.2 mi) at 8 kn (15 km/h; 9.2 mph)

Armament:

4 × 18-inch (460 mm) torpedo tubes (beam), four 18-inch (450-mm) bow tubes, plus 8 spare torpedoes
2 × BL 4-inch (101.6 mm) Mk XI guns
1 × 3 in (76 mm) gun

Twin 18-inch deck tubes originally fitted but later removed.

Complement:

59 (6 officers and 53 ratings)

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