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L 21

Built By: Vickers (Barrow)
Build Group: L2
Fate: Broken Up February 1939
L21
L21

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Commanders
1928: Lieutenant Commander   Geoffrey Meredyth Keble-White
1931: Lieutenant Commander   William Cowley Thomas
1933: Lieutenant Commander   Henry Carlton Cumberbatch
1936: Lieutenant   John Wallace Linton

Events

 15-09-1917   Laid Down
 11-10-1919   Launched
 05-10-1920   Completed
L2 Specification
Length overall  238 ft 7 inch
Beam  23 ft 6 inch
Draught  13 ft 3 inch
Displacement  914 tons (surface)
  1089 tons (submerged)
Diving Depth  150 ft
Speed  Surface 17 knots (design)
  Surface 17 to 17.5 knots (service)
  Submerged 10.5 knots (design)
  Submerged 10.5+ knots (service)
No. of shafts  2
Propeller  3 blades, 5 ft 7 inch diameter
Armament  4 x 18 inch bow tubes
  2 x 18 inch beam tubes
  (10 torpedoes carried)
  1 x 4 inch gun
Endurance  Surface: 2800 miles at full power (design)
  Surface: 2850 miles at full power or 3600 miles at half full power (service)
  Submerged: 14 miles at full power (design)
  Submerged: 14 miles at full power or 65 miles at 5 knots (service)
Complement   38
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