MODIFIED THREE-PIECE TRUCK REDUCES HUNTING AND IMPROVES CURVING

Analysis of dynamic truck oscillations shows that hunting can be controlled by elastic links which connect the diagonally opposed journal boxes of the two wheelsets of a truck. Yaw constraint of the wheelsets in relation to the truck frame can then be minimized and full advantage taken of the ability of conical wheelsets to align themselves radially on curved track. This stability ensures that tread profile conicity does not change as wheels wear and stability can be maintained for long periods. South African Railways has incorporated such a diagonal suspension truck with encouraging test results. Although sharp curves are prevalent on the track where tests were conducted, flange wear has been negligible.

• Supplemental Notes:
  • This is a paper from the proceedings of the 11th Annual Railroad Engineering Conference held at Southern Colorado State College, Pueblo, Colorado, October 23-24, 1974. Other individual papers from this conference have been accessioned separately for RRIS. The following is a list of the RRIS numbers of these papers preceded by its section number as it is contained in the bulletin: 03 097309, 13 097310, 04 097311, 03 097312, 03 097313, 04 097314, 03 097315, 03 097316, 03 097317, 03 097318, 03 097319. The entire proceedings 03 097307 has also been accessioned. All of these are contained in the Bulletin 7502.
• Corporate Authors:

  Federal Railroad Administration

  1200 New Jersey Avenue, SE
  Washington, DC  United States  20590
• Authors:
  • SCHEFFEL, H
• Conference:
  • This is a paper from the proceedings of the 11th Annual Railroad Engineering Conference held at Southern Colorado State College, Pueblo, Colorado, October 23-24, 1974. Other individual papers from this conference have been accessioned separately for RRIS.
• Publication Date: 1974

Media Info

• Features: Figures; References;
• Pagination: p. 41-46

Subject/Index Terms

• TRT Terms: Car trucks (Railroads); Geometric curves; Stability (Mechanics); Train track dynamics; Trucks; Vehicle design; Wear; Wheels
• Identifier Terms: Spoornet
• Subject Areas: Design; Motor Carriers; Railroads; Vehicles and Equipment;

Filing Info

• Accession Number: 00097308
• Record Type: Publication
• Source Agency: Federal Railroad Administration
• Files: TRIS, USDOT
• Created Date: Aug 13 1976 12:00AM