TESTS OF TRUCKS AND TRUCK SPRINGS DESIGNED TO PRODUCE EASIER RIDING AND REDUCE HARMONIC ACTION

The tests made in this investigation show that freight cars equipped with 1933 Standard A.R.A. or old Standard A.R.A. coil springs developed vertical oscillation at critical speeds, which is more pronounced at half load than at full load. This vertical oscillation or bouncing can be reduced or practically eliminated by the use of various stabilizing devices in conventional trucks or by special trucks, when true wheels are used. The use of these devices should effect savings by the reduction of lading and equipment damage in cars which operate at speeds above 40 miles per hour.

• Supplemental Notes:
  • Only conclusion page present.
• Corporate Authors:

  Association of American Railroads

  50 F Street, NW
  Washington, DC  United States  20001-1564
• Publication Date: 1934-3-3

Media Info

• Pagination: 1 p.

Subject/Index Terms

• TRT Terms: Critical velocity; Dynamics; Freight cars; Railroad cars; Spring; Suspensions; Technology; Trucks; Velocity
• Uncontrolled Terms: Vertical dynamics
• Geographic Terms: United States
• Subject Areas: Motor Carriers; Railroads; Safety and Human Factors; Vehicles and Equipment;

Filing Info

• Accession Number: 00040246
• Record Type: Publication
• Report/Paper Numbers: AAR MR-66 Prog Rpt
• Files: TRIS
• Created Date: Jul 8 1994 12:00AM