. American engineer and railroad journal . lowed tofall 9 inches. The compression of the copper disk was■3T, inch. A similar disk was then placed in a compres-sion testing machine and it required 152,081) pounds toreduce the height 32 inch. This can, therefore, be takenas the total capacity of the Westinghouse draft the spring resistance is 15,000 pounds, the value of thefrictional part of the device is 152,680 — — 137 680pounds. It will be seen that more than nine-tenths ofthe resistance is by friction. As this is the controllingresistance, and as it acts in both ways, that is,
. American engineer and railroad journal . lowed tofall 9 inches. The compression of the copper disk was■3T, inch. A similar disk was then placed in a compres-sion testing machine and it required 152,081) pounds toreduce the height 32 inch. This can, therefore, be takenas the total capacity of the Westinghouse draft the spring resistance is 15,000 pounds, the value of thefrictional part of the device is 152,680 — — 137 680pounds. It will be seen that more than nine-tenths ofthe resistance is by friction. As this is the controllingresistance, and as it acts in both ways, that is, in re-coil in either direction as well as in compression, itwill be evident that it exercises a braking action upon,and effectually checks the recoil of the springs. This re-coil of spring action frequently causestrains to break intwo and racks the draft rieging and car framing. Toeliminate these destructive forces is the main object ofthe Westinghouse draft gear. The work done incompressing it, as shown by the drop test, is 16,000.
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectrailroadengineering
