AERODYNAMIC DRAG REDUCTION TESTS ON A FULL-SCALE TRACTOR- TRAILER COMBINATION AND A REPRESENTATIVE BOX SHAPED GROUND VEHICLE

Aerodynamic drag tests were performed on a tractor-trailer combination and a box-shaped ground vehicle using the coast-down method on a smooth, nearly level runway. The tractor-trailer tests included an investigation of drag reduction add-on devices that are commercially available or under development. The box-shaped vehicle was modified by rounding the corners and sealing the undercarriage. The tests ranged in velocity from approximately 35 miles per hour to 65 miles per hous for the tractor-trailer combination and included fuel consumption measurements and one set of measurements of drive shaft torque. This paper presents the results for both vehicles, showing the effects of the various modifications on the aerodynamic drag. The effects of variation in the aerodynamic drag of the tractor-trailer combination on fuel consumption are also presented.

• Corporate Authors:

  Society of Automotive Engineers (SAE)

  400 Commonwealth Drive
  Warrendale, PA  United States  15096
• Authors:
  • Steers, L L
  • Montoya, L C
  • Saltzman, E J
• Publication Date: 1975-8

Media Info

• Pagination: 14 p.

Subject/Index Terms

• TRT Terms: Aerodynamics; Automotive engineering; Drag; Fuel consumption; Ground transportation; Tractor trailer combinations; Vehicle design
• Subject Areas: Design; Energy; Highways; Motor Carriers; Safety and Human Factors;

Filing Info

• Accession Number: 00144443
• Record Type: Publication
• Report/Paper Numbers: SAE #750703
• Files: TRIS
• Created Date: Dec 22 1976 12:00AM