Orion-class submarine

The Orion-class submarines were a class of two submarines built for the French Navy between 1928 and 1931.

Design
The Orion-class submarines were ordered in 1928 to a Loire-Simonot design. 67 m long, with a beam of 6.2 m and a draught of 4.4 m, they could dive up to 80 m. The submarines had a surfaced displacement of 558 LT and a submerged displacement of 787 LT. Propulsion while surfaced was provided by two diesel engines with a total of 1400 hp and two electric motors with a total of 1000 hp. The submarines' electrical propulsion allowed it to attain speeds of 9 kn while submerged and 14 kn on the surface. Their surfaced range was 4000 nmi at 10 kn with a submerged range of 82 nmi at 5 kn.