A history of the growth of the steam-engine . imbers of cedar and engine has a steam-cylinder 90 inches in diameter and12 feet stroke of piston. On each side the great saloonswhich extend from end to end of the upper deck are state-rooms, containing each two berths and elegantly engine of this vessel is capable of developing about2,500 horse-power. The great wheels, of which the paddle-boxes are seen rising nearly to the height of the hurricane-deck, are 37^ feet in diameter and 12 in breadth. The hullof this vessel, including all wood-work, weighs over 1,200tons. The
A history of the growth of the steam-engine . imbers of cedar and engine has a steam-cylinder 90 inches in diameter and12 feet stroke of piston. On each side the great saloonswhich extend from end to end of the upper deck are state-rooms, containing each two berths and elegantly engine of this vessel is capable of developing about2,500 horse-power. The great wheels, of which the paddle-boxes are seen rising nearly to the height of the hurricane-deck, are 37^ feet in diameter and 12 in breadth. The hullof this vessel, including all wood-work, weighs over 1,200tons. The weight of the machinery is about 625 steamer makes 16 knots an hour when the engine is atits best speed—about 17 revolutions per minute—and its The engines of steamers Bristol and Providence are 110 inches indiameter, and of 12 feet stroke. ITARINE ENGINES. 383 average speed is about 14 knots on its route of 160 coal required to supply the furnaces of such a vesseland with such machinery would be about 3 tons per hour,. » H 384 THE STEAM-ENGINE OF TO-DAY. or a little over 2^ pounds per horse-power. The construc-tion of such a vessel occupies, usually, about a year, andcosts a quarter of a million dollars. The non-condensing direct-acting engine is used princi-pally on the Western rivers, driven by steam of from 100to 150 pounds pressure, and exhausts its steam into the at-mosphere. It is the simplest possible form of direct-actingengine. The valves are usually of the poppet variety,and are operated by cams which act at the ends of long
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Keywords: ., bookcentury1800, bookdecade1870, bookidc, booksubjectsteamengines
