MODIFIED THREE-PIECE TRUCK REDUCES HUNTING AND IMPROVES CURVING - STATUS REPORT

The often-condemned three-piece cast steel freight truck has two advantages: It is inexpensive to manufacture and it has excellent load equalization that allows it to negotiate large changes in crosselevation. This paper describes Standard Car Truck's work with the Anchor Truck design of the South African Railways which improves the basic three-piece truck's curving ability and yet gives it high-speed stability. Utilizing the creep theory in which a wheel is displaced from its position of pure rolling, various conclusions are drawn about wheelset and truck stability. The role of the SAR-developed diagonal anchors and the service experience on SAR's ore car and with a US installation on a 100-ton hopper are described.

Media Info

  • Features: Figures;
  • Pagination: p. 85-92

Subject/Index Terms

Filing Info

  • Accession Number: 00132969
  • Record Type: Publication
  • Source Agency: Federal Railroad Administration
  • Report/Paper Numbers: FRA OR&D 76-243
  • Files: TRIS, USDOT
  • Created Date: Jun 5 1976 12:00AM