A combination of subscale wind tunnel model tests and full-scale coast-down and highway fuel consumption tests have been conducted on baseline and low-drag tractor-trailer configurations. Fuel savings calculated for the low-drag configuration, based on the model drag data or the full-scale drag data, correlate quite well with fuel savings obtained from over-the-road tests at highway speeds. Sub-scale drag tests for flow-vane and boattail devices provided drag reductions of about 48 percent and 15 percent, respectively, for bus- or motor-home-type vehicles. Full-scale boattail drag data are also presented.
A Summary of NASA Dryden's Truck Aerodynamic Reasarch
Sae Technical Papers
SAE International Truck and Bus Meeting and Exposition ; 1982
1982-02-01
Conference paper
English
NASA Dryden's UAS Service Capabilities
NTIS | 2007
|NASA Dryden's UAS Service Capabilities
NTRS | 2007
|A Summary of NASA Drydens Truck Aerodynamik Research
Automotive engineering | 1982
|