The Works Of Messrs. Schneider And Co.

106 MESSRS. SCHNEIDER AND CO.’S WORKS. The main engines, which were built by Messrs. Schneider and Co. (see Figs. 280 and 281, Plate LVIIL, and Fig. 282), are horizontal, three-cylinder triple- expansion, each driving a propeller. The principal dimensions are the following : m. in. Diameter of high-pressure cylinder... 0.800 3U ,, mean-pressure ,, 1.200 47} ,, low-pressure ,, 1.900 w Stroke 0.900 35t75 Blocks are, moreover, fitted to the cylinders by forged-steel crossbars. All the crankshafts, intermediate, and propeller shafts are liollow, of forged steel; the propellers are of special brass, cast in one piece. Each engine-room is provided with a ventilator. The Condensed water dis- charged by the air pumps of each engine is collected in a tank provided with filters through which it passes before going to the Boilers. Special evaporators serve for the production of fresh water for the feed make up ; the bollers are thus fed entirely with fresh water. There are 16 boilers Engines of the French Protected Cruiser “Chanzy.” Each engine is provided with a condensing installation, consisting of a wrought-brass tubulär condenser, two single-acting vertical air pumps, and a centrifugal cir- culating pump. The pumps are worked by a separate engine. All tlie slide-valves are cylindrical ; the high-pressure cylinder is fitted with one, while the mean and low-pressure cylinders have eaeh two. The steam distribution motion is on the Marshall system. The reversing gear, which is worked by hånd and by steain power, allows of regulating tlie degree of admission of steam in the cylinders. The pistons are of cast steel and conical in shape. The foundation plates on which rest the crankshaft bearer-blocks, are also of cast steel ; the bearer- of the Belleville type, as preseribed by the French Admiralty for this cruiser, placed in two stokeholds and connected in two funnels. Registered pressure ... Total grate area Total heating surface not covered by water 17 kilogs. 64.50 sq. m. 1,814 ,, 241.8 Ib. per sq. in. 694.3 sq. ft. 19,526 „ The boilers are fed by eight pumps of the Belleville type. The stokehold ventilation and the working under foreed draught, are insured by eight ventilators. The maximum total power preseribed was 8,300 indicated horse- power, with a maximum pressure of 12 kilogrammes