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61 war
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62 Cugnot, Nicolas Joseph
SUBJECT AREA: Land transport[br]b. 26 February 1725 Void, Meuse, Franced. 2 October 1804 Paris, France[br]French military engineer.[br]Cugnot studied military engineering in Germany and returned to Paris by 1769, having left the service of Austria, where he taught military engineering. It was while serving in the army of Les Pays Bas that he invented a "fusil" or carbine, which was adopted by the Archduke Charles and put into service in the Uhlan regiments.In 1769 he invented a fardier à feu, also called a cabriolet, a steam-driven, heavy three-wheeled vehicle. This tractor, designed to pull artillery pieces, was driven through its single front wheel by two single-acting cylinders which rotated the wheel through ratchets. The ratchet pawls were carried on levers pivoted on the wheel axis, coupled to the piston rods by connecting rods. Links from pivots half-way along the levers connected upwards to a rocking cross-beam fixed on the end of the steam cock so as to pass steam alternately from the undersized boiler to the two cylinders. The tractor had to be stopped whenever it needed stoking, and its maximum speed was 4 mph (6.4 km/h). The difficulty of controlling it led to its early demolition of a wall, after which it was locked away and eventually preserved in the Conservatoire des Arts et Métiers in Paris. This was, in fact, Cugnot's second vehicle: the first model was presented to the due de Choiseul et Guiberuval, who asked for a more robust and powerful machine which was built at the Arsenal at the expense of the state and tested in 1771. Cugnot was granted a pension of 600 livres. After the revolution he tried in vain in 1798 and 1801 to interest Bonaparte in this invention.[br]BibliographyCugnot published a number of military textbooks, including: 1766, Eléments de l'art militaire.1778, Theory of Fortification.Further ReadingD.J.H.Day, 1980, Engines.A.F.Burstall, 1963, A History of Mechanical Engineering. 1933, Dictionnaire de biographie française.IMcN
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