Aerodynamic drag reduction tests on a full-scale tractor-trailer combination with several add-on devices

Technical Report · Sun Dec 01 00:00:00 EST 1974

DOI:https://doi.org/10.2172/7220927· OSTI ID:7220927

Montoya, L C; Steers, L L

Aerodynamic drag tests were performed on a conventional cab-over-engine tractor with a 45-foot trailer and five commercially available or potentially available add-on devices using the coast-down method. The tests ranged in velocity from approximately 30 miles per hour to 65 miles per hour and included some flow visualization. A smooth, level runway at Edwards Air Force Base was used for the tests, and deceleration measurements were taken with both accelerometers and stopwatches. An evaluation of the drag reduction results obtained with each of the five add-on devices is presented.

• Research Organization: National Aeronautics and Space Administration, Edwards AFB, CA (USA). Dryden Flight Research Center
• OSTI ID: 7220927
• Report Number(s): NASA-TM-X-56028
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
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VEHICLES
330601* - Vehicle Design Factors- Body & Chassis