HMS L11


HMS L11 was a L-class submarine built for the Royal Navy during World War I. She was one of five boats in the class to be fitted as a minelayer. The boat survived the war and was sold for scrap in 1932.

Design and description

L9 and its successors were enlarged to accommodate 21-inch torpedoes and more fuel. The submarine had a length of overall, a beam of and a mean draft of. They displaced on the surface and submerged. The L-class submarines had a crew of 38 officers and ratings.
For surface running, the boats were powered by two 12-cylinder Vickers diesel engines, each driving one propeller shaft. When submerged each propeller was driven by a electric motor. They could reach on the surface and underwater. On the surface, the L class had a range of at.
The boats were armed with four 21-inch torpedo tubes in the bow and two 18-inch in broadside mounts. They carried four reload torpedoes for the 21-inch tubes for a grand total of ten torpedoes of all sizes. They were also armed with a deck gun. L11 was fitted with 16 vertical mine chutes in her saddle tanks and carried one mine per chute.

Construction and career

L11 was built by Vickers, Barrow. She was laid down on 17 January 1917 and was commissioned on 27 June 1918. The boat was sold for scrap in February 1932.