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.
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Supplemental Notes:
- Proceedings of the 12th Annual Railroad Engineering Conference held at Pueblo, Colorado, October 23-24, 1975. The complete volume is RRIS 02 132958, Pricing is for the complete volume: Repr. PC $6.75, Microfiche$2.25, NTIS PB-252968/AS.
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Corporate Authors:
Federal Railroad Administration
1200 New Jersey Avenue, SE
Washington, DC United States 20590 -
Authors:
- Bullock, R L
- Conference:
- Publication Date: 1975-10
Media Info
- Features: Figures;
- Pagination: p. 85-92
Subject/Index Terms
- TRT Terms: Hunting (Dynamics); Railcar trucks; Railroad cars; Railroad wheelsets; Ride quality; Steering; Suspension systems; Trucks; Vehicle design; Wear; Wheels
- Subject Areas: Design; Motor Carriers; Railroads; Vehicles and Equipment;
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