WIND TUNNEL DEVELOPMENT OF THE DRAG FOILER--A SYSTEM FOR REDUCING TRACTOR-TRAILER AERODYNAMIC DRAG
Dragfoiler II, an effective and practical add-on aerodynamic drag reducing system for tractor-trailers, has been developed. Wind tunnel tests with 1/16- and 1/7-scale tractor-trailer models were used to determine empirical design guidelines for the Dragfoiler II's side elevation and planform shapes. Optimum designs for various combinations of tractor roof height and length, trailer height, and tractor-to-trailer gap length gave zero-yaw drag reductions between 30 and 35%. At a yaw angle of 10 deg, the percentage drag reductions were about half those at 0 deg. Off-design performance and the effects of trailer side-edge geometry were investigated.
- Presented at a meeting held August 11-14, 1975.
Warrendale, PA United States 15096
- Mason Jr, W T
- Publication Date: 1975
- Pagination: 21 p.
- TRT Terms: Air resistance; Drag; Intermodal transportation; Trailers; Wind
- Subject Areas: Freight Transportation; Railroads; Vehicles and Equipment;
- Accession Number: 00128892
- Record Type: Publication
- Source Agency: Engineering Index
- Report/Paper Numbers: No. 750705 Preprint
- Files: TRIS
- Created Date: Feb 4 1976 12:00AM