Streamlined trucks save bucks

An experimental fuel-saving device developed at Clarkson University may save the trucking industry substantial sums of money and help reduce vehicle emissions.

“The aft end of ground vehicles is often a design compromise between functionality and aerodynamics,” explained Ken Visser, associate professor of Aeronautical and Mechanical Engineering. “Traditional transport vehicles have a flat aft end that creates a large drag on the vehicle at highway speeds, which ultimately reduces gas mileage and increases costs and emissions.

“We have designed extendable flat plates that can be mounted to the truck’s rear doors to reduce drag.”

The device, which resembles a set of second doors when closed and opens out into a box-like structure, has been studied in Clarkson’s wind tunnel as well as tested on full-scale vehicles in cross-country road tests.

“The most recent data based on road testing indicates that the device will save approximately one-half mile per gallon, an increase in fuel efficiency of about 10 percent,” said Visser. “This translates into a savings on the order of about $4,000 per year for a truck running 150,000 miles at $2.50 a gallon of fuel.”