Identifier: americanengineer861newy (find matches)
Title: American engineer
Year: 1912 (1910s)
Authors:
Subjects: Railroad engineering Engineering Railroads Railroad cars
Publisher: New York, N.Y. : Simmons-Boardman Pub. Co
Contributing Library: Carnegie Library of Pittsburgh
Digitizing Sponsor: Lyrasis Members and Sloan Foundation

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ive Works. Eachlocomotive develops a tractive effort of 35,000 lbs. The boilersof 22 are fitted w-ith Buck-Jacobs superheaters of the latest de-sign, in which the superheating chamber is built into the boilershell, and all of them have Jacobs-Shupert fireboxes. Sixof the locomotives are equipped for burning oil, while the re-maining 22 burn coal. Of these, seven are arranged for burn-ing Gallup coal, a light coal similar to lignite, mined in westernXew Mexico. In order to determine the relative merits of firetube and drum type superheaters, three of the oil burners andtwo of the bituminous coal burners are fitted with Schmidtsuperheaters. Each pair of cylinders is cast in one piece with a half saddleand a common piston valve, the center of which is 7 in. insidethe low pressure cylinder center. The valve is arranged for in-side high pressure admission and outside low pressure admis-sion, and is of the type commonly used by the builders with bal- 65 66 AMERICAN ENGINEER. Vol. 86, No. 2.
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February, 1912. AMERICAN ENGINEER. 67 anccd compound locomotives. The steam pipes are on the out-side, where the joints are accessible for inspection and repairs,and where possible leaks will not affect the steaming of the en-gine. This is in accord with the latest practice of the Santa Fe,and is of the same general arrangement as applied to locomotivesdelivered on recent orders. The high pressure cylinders are 21in. apart, measured transversely, and arc set on a slope of lYzdeg. Their location makes it impossible to run the front andback flanges which take the cylinder bolts the full depth of the web and forged steel discs. Owing to the inclination of the in-side cylinders, the inside and outside cranks on the same sideof the locomotive are placed 187^ deg. apart. In the valve motion the links arc carried on longitudinal bear-ers outside the leading pair of driving wheels, and rockers areused to transmit the motion from the combining levers to thevalve rods. The rocker Ij^es are supp

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