The French submarine Espadon was a built for the French Navy in the mid-1920s. Laid down in October 1923, it was launched in May 1926 and commissioned in December 1927. It was disarmed at Bizerte, Tunisia in April 1941 and captured there by Italian forces on 8 December 1942 and renamed FR 114. It was scuttled by the Italians at the Castellamare shipyard on 13 September 1943, then raised by the Germans in 1943 but not repaired.Fontenoy, p. 182
Design long, with a beam of and a draught of , Requin-class submarines 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 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 .
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