O'Byrne Class
French Submarines. Photographs and history of the French
submarines of the O'Byrne Class.These submarines were launched 1919 -
1920 and included Henri Fourier, Louis Dupetit-Thouars and O'Byrne.
Displacement:
342 tons, and 513 tons when submerged. Speed 14 knots on the
surface and 8 Knots submerged. Range: 1850NM at 10Knots, surfaced. or 55
nautical miles submerged. Crew 25 Armament: One
47-mm gun, and Four 450mm Torpedo Tubes