Bulletin - United States National Museum (1956) (14598025680)

Identifier: bulletinunitedst2101956unit (find matches)
Title: Bulletin - United States National Museum
Year: 1877 (1870s)
Authors: United States National Museum Smithsonian Institution United States. Dept. of the Interior
Subjects: Science
Publisher: Washington : Smithsonian Institution Press, (etc.) for sale by the Supt. of Docs., U.S. Govt Print. Off.
Contributing Library: Smithsonian Libraries
Digitizing Sponsor: Smithsonian Libraries



Text Appearing Before Image:
a, the use of passenger locomotives of the three-coupledtype, with the troubles incident to the use of long parallel rods,was put off^for a decade. General Electric Locomotive, 1926 A detailed and exquisitely made operable model of theNew^ York Central class T-3A electric locomotive No. 1173,now^ No. 273, was constructed by W. Howard R. Parsons,and was donated by him in 1952 to the Museum (USNM314237). The model (figure 75) is powered by eight electric motors,as is the full sized original, one for each axle, but because ofspace limitations and power requirements the models driveis through gears rather than direct. The model operates on12-volt direct current. Its length is 43 inches and its gauge is3^2 inches. The New York Central System purchased 10 class T-3Alocomotives in late 1926 at a cost of $100,000 each. Thesesupplemented an earlier group of 10 T-ls and 16 T-2sbuilt for the New York Central from 1913 to 1917 at theErie, Pa., plant of the General Electric Co. Of this total of 94
Text Appearing After Image:
Figure 75.—Operable model of General Electric locomotive, 1926. 36 locomotives only one, No. 270 (formerly Mo. 1170), hadbeen stricken from the records as of December 1954. Theremaining 35 still perform routine passenger service betweenNew York and Harmon, and New York and North WhitePlains. The numbers in the group now run from 247 to 282(formerly 1147 to 1182), with the exception of the scrappedNo. 270. With an operating weight of 292,600 pounds, the locomo-tives of the T-3A class develop 1,908 horsepower continu-ously, with a tractive force of 12,750 pounds, and they candevelop 2,488 horsepower for 1 hour, with a tractive forceof 18,440 pounds. The maximum speed of a T-3A is 75 milesan hour. These locomotives operate on 660-volt direct cur-rent, usually obtained from a third rail. The pantographsare used only when crossing certain complicated crossoverswitches. Each of the eight axles is driven by its individualgearless motor. The overall wheelbase is 46 feet, 5 inches,the overal