Aerodynamic drag is a significant factor in fuel consumption of tractor-trailers. Since aerodynamic resistance increases as the square of the speed, fuel costs to overcome air resistance quadruple when vehicle speed is doubled. At 55 mph a heavy truck requires over 100 hp to overcome air resistance alone. Several devices were tested for their ability to reduce aerodynamic drag when mounted on tractor-trailers and thus improve fuel economy. An airfoil shield, a lip-type device, and a porous screen were all found to give significant reductions in aerodynamic drag with accompanying fuel savings.

Media Info

  • Features: Photos;
  • Pagination: p. 40-43
  • Serial:
    • Automotive Engineering
    • Volume: 83
    • Issue Number: 8
    • Publisher: Society of Automotive Engineers (SAE)
    • ISSN: 0098-2571

Subject/Index Terms

Filing Info

  • Accession Number: 00099283
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Sep 10 1975 12:00AM