NONFRICTION BRAKING METHODS FOR RAILWAY VEHICLES

Performance potential and approximate cost estimates are presented for three nonfriction braking systems: air retarder, hydraulic retarder, and aerodynamic braking. It is shown that the air and the hydraulic retarders have potential to develop full braking deceleration in a speed range from 250 to 25 mph. Because of the air retarder's potential advantages in system weight, simplicity and cost, prototype development of the retarder is indicated. Aerodynamic braking deceleration is highly dependent on the cumulative effect of longitudinally spaced braking surfaces. Further wind tunnel testing is required for complete evaluation.

• Supplemental Notes:
  • This paper was presented at the ASME Winter Annual Meeting, November 28-December 2, 1971. The notification of this paper appeared in Mechanical Engineering.
• Corporate Authors:

  American Society of Mechanical Engineers

  Two Park Avenue
  New York, NY  United States  10016-5990
• Authors:
  • Cassidy, R J
• Publication Date: 1971

Subject/Index Terms

• TRT Terms: Aerodynamics; Braking; Drag
• Old TRIS Terms: Aerodynamic braking; Air retarders; Hydraulic retarders; Nonfriction braking systems
• Subject Areas: Railroads;

Filing Info

• Accession Number: 00041671
• Record Type: Publication
• Source Agency: Mechanical Engineering
• Report/Paper Numbers: 71-WA/RT-3
• Files: TRIS
• Created Date: Jun 15 1976 12:00AM