Identifier: railroadengineer62newy (find matches)
Title: The railroad and engineering journal
Year: 1887 (1880s)
Authors:
Subjects: Railroad engineering Engineering Railroads
Publisher: New York : M.N. Forney
Contributing Library: Carnegie Library of Pittsburgh
Digitizing Sponsor: Lyrasis Members and Sloan Foundation

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ut9 per cent., therefore, the speed of the ship will be 20 knots.The engines stand side by side, with a longitudinal bulk-head between them. They are in every respect duplicates.A door is provided in the bulkhead opposite the interme-diate cranks, and the starting platforms are opposite thedoorway. The reversing gear is Browns patent hydraulic.The engines are quite easily started, stopped, or reversedby one engineer on each platform. The engines arewholly of steel and gun-metal, save the cylinders. Thegreat A-frames are splendid castings, each weighing 6tons—that is, 12 tons for each cylinder. The valves are allpistons—four being fitted to the low-pressure cylinder,two to the intermediate, and one to the high-pressure cyl-inder. The eccentric hoops are cast steel, lined withI white metal, as are all the bearings throughout. TheI valves are disposed in the corners, so to speak, and theI valve-stems are united in pairs by cross-heads. They work 414 THE RAILROAD AND (September, 1888.
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Vol. LXII, No. 9.) ENGINEERING JOURNAL. 415 so smoothly and are so perfectly balanced that the valvegear, which is of the ordinary Stephenson link type, hasreally very little to do. The surface condensers are hori-zontal cylinders lying rather high up in the wings. Theair-pumps are worked by back levers in the usual way. There are no feed-pumps on the main engine, the boilersbeing supplied by five vertical Worthington donkey-pumpsin each engine-room, standing against the forward bulk-head. Two of these pumps will feed the boilers, but theothers are for reserve, or for the countless pumping jobswanted in a big ship. The engines actually employed atany time in feeding the boilers are controlled by an auto-matic arrangement, a float in the hot-well rising or killingwith the level of the water in the well, and opening orshutting the throttle valve, an arrangement which is, sofar as we are aware, quite new in marme work, and foundto answer admirably, the donkey remaining steadily atwork in

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