Farfadet-class submarine

The Farfadet class consisted of four submarines built for the French Navy at the beginning of the 20th century designed by Gabriel Maugas. Two boats were lost in diving accidents. All were disposed of prior to the outbreak of the First World War.

Design and description

The Farfadets were designed by Gabriel Maugas, an early French submarine engineer at the Rochefort Naval Dockyard. Derived from the, the Farfadets were single-hulled, and powered by electric motors only, limiting their range and surface performance compared to the contemporary Sirène class. However they had variable-pitch propellers, developed by Maugas, obviating the need for a reversing engine.
The first three submarines, Farfadet, Gnome, and Korrigan, displaced surfaced and submerged. They had an overall length of, a beam of, and a draft of. The fourth submarine, Lutin, had an overall length of. The crew of all of the submarines numbered 2 officers and 12 enlisted men.
All of the boats were powered by a pair of Sautter-Harlé electric motors providing a total of, both driving the single propeller shaft, except for Lutin which had two shafts. The first three boats were fitted with side-thrusting propellers at the stern to assist in steering. They could reach a maximum speed of on the surface and underwater. The Farfadet class had a surface endurance of at and a submerged endurance of at.
The boats were armed with four external Tissier torpedo launchers, two aimed forward and two aimed to the rear.

Service history

The Farfadets were ordered as part of the French Navy's 1899 building programme, and were constructed over the next three years at the naval dockyards at Rochefort. However they were not successful in service. The loss of Farfadet on 6 July 1905, off the coast of Bizerte, Tunisia, was a national tragedy. The submarine sank suddenly after an attempt to dive failed due to a conning tower hatch being improperly shut. The officer tried to open and re-close it, but the increasing water pressure forced the hatch open completely, resulting in a rapid inundation.
14 crewmen died in the disaster. Although divers quickly located the submarine in shallow water, a salvage attempt failed when the lifting cable broke, plunging the vessel back to the bottom. Eight sailors had sealed themselves in the aft compartment and were heard tapping on the hull for 32 hours, but they ultimately succumbed to chlorine gas created by the reaction between seawater and the sulfuric acid in the batteries. The public shock was immense, and the accident drew nationwide attention to the inherent dangers of early submarine warfare.
This was not the only accident that occurred. The class suffered a second tragedy a year later when the submarine Lutin sank at Bizerte on 16 October 1906. The vessel was lost due to structural weakness in the hull under external pressure, an expensive design flaw that resulted in the loss of the entire crew of 13 men. After being salvaged, Lutin was never recommissioned for service but was instead used for trials and as a target ship before being scrapped.
The other two vessels were taken out of service in 1906 and sold for scrap in 1910–1911.

Ships

Ship	Builder	Laid down	Launched	Commissioned	Fate
Farfadet	Arsenal de Rochefort	2 April 1900	17 May 1901	29 August 1902	Lost in diving accident, 6 July 1905. Raised, re-commissioned as Follet, stricken, 22 Nov 1913, and sold for scrap.
Korrigan	Arsenal de Rochefort	23 April 1900	25 January 1902	29 August 1902	Sold for scrap, 10 August 1911
Gnome	Arsenal de Rochefort	1901	23 July 1902	2 June 1905	Sold for scrap, 24 March 1912
Lutin	Arsenal de Rochefort	27 February 1902	12 February 1903	1904	Sold for scrap, 2 August 1911