HMS Leonidas (1913)
Overall cost of the ship was £100,000 Leonidas, together with Lucifer, was one of two experimental destroyers ordered in 1912 from Parsons to be fitted with fully geared turbines.Sufficiently robust gearboxes were at that time experimental and were only just being produced by Parsons who had developed innovative gear cutting equipment.For the same overall dimensions, Parsons used a blade area of 54 square feet (5.0 m2) while the admiralty preferred 42.5 sq ft (3.95 m2).This was first employed in 1913 on a cross-channel steamer, Paris built by Denny of Dunbarton which also used geared turbines, and then on Leonidas and Lucifer.[2][3] Leonidas took part in a battle off Noorhinder Bank on 1 May 1915 when together with three other destroyers, Laforey, Lawford and Lark, she was dispatched to go to the aid of four British armed trawlers which had engaged two German torpedo boats, A2 and A6.