AN EVALUATION OF THE AERODYNAMIC DRAG REDUCTIONS PRODUCED BY VARIOUS CAB ROOF FAIRINGS AND A GAP SEAL ON TRACTOR-TRAILER TRUCKS

A study has been carried out to determine the reduction in the aerodynamic drag of tractor-trailer trucks brought about by fairings mounted on the cab roof and a vertical seal mounted across the gap between the tractor and the trailer. This study was conducted using one-eighth-scale models in a wind tunnel at a Reynolds number of about 25 percent of that of full scale trucks at 50 mph. Reductions of up to 35 percent of the zero-yaw drag coefficient, and of over 25 percent of the wind-averaged drag coefficient were obtained. /GMRL/

• Corporate Authors:

  Society of Automotive Engineers (SAE)

  400 Commonwealth Drive
  Warrendale, PA  United States  15096
• Authors:
  • Marks, C H
  • Buckley Jr, F T
  • Walston Jr, W H
• Publication Date: 1976-2

Media Info

• Pagination: 10 p.
• Serial:
  • Society of Automotive Engineers Preprint
  • Publisher: Society of Automotive Engineers (SAE)

Subject/Index Terms

• TRT Terms: Aerodynamics; Drag; Tractor trailer combinations; Trucks; Wind tunnels
• Subject Areas: Highways; Motor Carriers; Safety and Human Factors;

Filing Info

• Accession Number: 00145230
• Record Type: Publication
• Report/Paper Numbers: SAE 760105
• Files: TRIS
• Created Date: May 31 1977 12:00AM