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Monday 22 February 2016

French pre dreadnought battleship Diderot 1907-1937


Danton-class

Courbet-class

Of the Danton-class consisting of the Condorcet, Danton, Diderot, Mirabeau, Vergniaud and Voltaire. Building at the Ateliers et Chantiers de la Loire, St. Nazaire, France started in 26 December 1906, laid down on 23 August 1907, launched on 19 April 1909, completed on 1 August 1911, modernized 1922-1925, training ship since 1927, condemned on 17 March 1937 and sold for 3.557.019 French francs to M. Gosselinh-Durlez, arriving at Dunkirk, France to be broken up on 31 August 1937.

Preceded by the Liberté-class and succeeded by the Courbet-class. Due to the huge number of changes of the original design and lacking decisions of the French minister of navy Gaston Thomson (29 January 1848, Oran, French Algeria-14 May 1932 Bône, Algeria) in time caused a serious delay in realizing the class. General technical specifications of this class. Displacement 18.754 tons/18.458 long tons (normal)-19.763 tons/19.451 long tons (deep load) and as dimensions 145 (on waterline)-146,6cm (over all) x 25,8 x 8,44 metres or 475.9-481.0 x 84.8 x 27.8 feet. The 4 License built Parsons steam turbines and 26 coal-fired Belleville or Niclausse water tube-boilers supplied via 4 shafts 22.500 shp allowing a speed of 19,25 (design)-19,7/20,66 (trials) knots and with a speed of 12 knots and a maximum coal bunker capacity of 2.027 tons/1.995 tons varied the range between 3.120-4.866 nautical miles. The range was nearly the half of the preceded classes caused by the worse economical fuel consumption of the turbines at low speeds. The crew numbered 915 men if she served as flagship otherwise 852 men. The armour with a weight of 6.725 tons which was 36% of their displacement consisted of a 18-25cm/7.1-9.8” thick belt, a 4,5-7cm/1.8-2.8” thick deck and with the main gun turrets, secondary turrets and conning tower protected by respectively 26-34cm/10.2-13.4”, 18,8-22,5cm/7.4-8“ and 21,6-26,6cm/8,5-1’.5” thick deck. The armament consisted of 2x2-30,5cm/12”/45 Modèle 1906 guns, 6x2-24cm9.4”/50 Modèle 1902 guns, 16x1-7,5cm/3.0”/65 Modèle 1908 Schneider guns, 10x1-4,7cm/1.9“ Hotchkiss guns and 2-45cm/17.7” submerged torpedo tubes (each broadside 1).