French submarine Lagrange

Lagrange was completed in 1918 but saw no action during World War I and served in the French Marine Nationale until 1935.

The Lagrange class submarines were constructed as part of the French fleet's expansion programmes from 1913 to 1914.

[1][2] The ships were designed by Julien Hutter, slightly modifying his previous project Dupuy de Lôme, using two Parsons steam turbines with a power of 2,000 hp (1,491 kW).

It was named in honor of the distinguished French eighteenth-century mathematician Joseph-Louis Lagrange.

From 1922 to 1923, Lagrange underwent a major refit in which it received a new conning tower, bridge and periscope.