French submarine Regnault
The French submarine Regnault was a built for the French Navy built between 1913 and 1924. It was laid down in the Arsenal de Toulon shipyards and launched on 25 June 1924. Regnault was completed in 1924 and served in the French Marine Nationale until 1937.
Design
The Lagrange-class submarines were constructed as part of the French fleet's expansion programmes from 1913 to 1914. The ships were designed by Julien Hutter, slightly modifying his previous project, using two Parsons steam turbines with a power of. During construction, though, the idea was abandoned and the ships were instead equipped with diesel engines.Lagrange-class submarines were long, with a beam of and a draught of, and could dive up to. The submarine had a surfaced displacement of and a submerged displacement of. Propulsion while surfaced was provided by two diesel motors built by the Swiss manufacturer Sulzer and two electric motors. The submarines' electrical propulsion allowed it to attain speeds of while submerged and on the surface. Their surfaced range was at, and at, with a submerged range of at.
The ships were equipped with eight 450 mm torpedo tubes, with a total of 10 torpedoes and two on-board guns. The class was also armed with a 75 mm gun with an ammo supply of 440 shells. The crew of one ship consisted of four officers and 43 of officers and seamen.