09-16-2013, 09:25 PM
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#68 (permalink)
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Master EcoModder
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Lawrence Livermore National Lab, Navistar work to increase semi-truck fuel efficiency
Full-scale tests taking place in world’s largest
wind tunnel at NASA Ames
https://www.llnl.gov/news/newsreleas...-10-02-08.html
Quote:
Aerodynamic drag is caused from pressure differences around the vehicle. At highway speeds, a semi-truck uses more than 50 percent of the energy produced by the vehicle engine to overcome aerodynamic drag, while rolling resistance consumes roughly 30 percent of the usable energy.
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