AERODYNAMIC DRAG REDUCTION TESTS ON A FULL-SCALE TRACTOR-TRAILER COMBINATION WITH SEVERAL ADD-ON DEVICES

Aerodynamic drag tests were performed on a conventional cab-over-engine tractor with a 45-foot trailer and five commercially available or potentially available add-on devices using the coast-down method. The tests ranged in velocity from approximately 30 miles per hour to 65 miles per hour and included some flow visualization. A smooth, level runway at Edwards Air Force Base was used for the tests, and deceleration measurements were taken with both accelerometers and stopwatches. An evaluation of the drag reduction results obtained with each of the five add-on devices is presented. (Author)

• Supplemental Notes:
  • Subm-Sponsored in Part by Pot. Conf-Presented at the Reduction of Aerodynamic Drag of Trucks Conf., Pasadena, Calif., 10-11 Oct. 1974.
• Corporate Authors:

  National Aeronautics and Space Administration

  Flight Research Center
  Edwards AFB, CA  United States  93523
• Authors:
  • Montoya, L C
  • Steers, L L
• Publication Date: 1974-12

Media Info

• Pagination: 26 p.

Subject/Index Terms

• TRT Terms: Accelerometers; Aerodynamics; Chemical reduction; Drag; Energy conservation; Flow visualization; Fuel consumption; Performance tests; Trucks; Wind
• Old TRIS Terms: Drag reduction; Reduction; Wind effects
• Subject Areas: Energy; Environment; Highways; Motor Carriers; Safety and Human Factors;

Filing Info

• Accession Number: 00091158
• Record Type: Publication
• Source Agency: National Technical Information Service
• Report/Paper Numbers: NASA-TM-X-56028
• Files: TRIS
• Created Date: Jun 26 1975 12:00AM