Identifier: cyclopediaofloco00swin (find matches)
Title: Cyclopedia of locomotive engineering, with examination questions and answers; a practical manual on the construction care and management of modern locomotives
Year: 1916 (1910s)
Authors: Swingle, Calvin Franklin, 1846- (from old catalog)
Subjects: Locomotives
Publisher: Chicago, F. J. Drake & co., pub. for Sears, Roebuck & co.
Contributing Library: The Library of Congress
Digitizing Sponsor: The Library of Congress

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k effort is uniform and higherthan a slide yalved engine. Besides causing less wearIn the machinery, this gives a more even torque whenlarting and the consequent less slipping.1 The engine is one which will bear thorough investi-ation. While our experiments have been made inassenger service, I consider that the performance in-eight service will show even better results from bothjn operation and economical standpoint. It should not be inferred that the Young valves arejesigned for light throttle conditions only. TheseJigines, as will be seen by reference to Figs. 96 and7, respond readily to a wide open throttle, and onejagram, No. 14, shown in Fig. 97, indicates a speedI 396 R. P. M. and 95 miles per hour, with full throt-je and cutting off at four inches. ■ Fig. 98 shows a general view of engine 1026 of theJ & N. W,, which engine is equipped with this valve. Questions 262. Are there any other types of valves used oncomotives, besides the D slide valve? 198 LOCOMOTIVE ENGINEERING
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PISTON VALVES AND BALANCED VAL\r,S 103 263. Mention a few of them. 264. What is the principal objection to the D slidevalve? 265. Is the piston valve a perfectly balanced valve? 266. What pressure tends to press the D valveagainst its seat? 267. Is there any pressure to counteract this? 268. What-are the causes of friction in piston valves? 269. Are^all piston valves outside admission valves? 270. Why are piston valves practically balanced? 271. Why are piston valves made as long as possible?2J2. What controls the admission of steam to the ports of a piston valve engine? 273. How is an outside admission piston valve set? 274. How is an inside admission valve set? 275. What advantage results from using an insidejidmission piston valve? 276. Name another advantage in inside admission.2jy. What is one of the first duties of an engineer aking charge of a piston valve engine? 278. Why should he do this? 279. Are all engines equipped with indirect valveear? 280. Repeat four simple rules for

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