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This paper describes the design and fabrication of a composite body for a solar-electric vehicle. The body shape selected was chosen to optimize the aerodynamics and solar collection features essential to a solar-electric vehicle, and refined using wind-tunnel information from a one-sixth scale model. The computer model was transformed into a full scale model which was then used to produce glass fiber and resin molds capable of withstanding high temperatures. These molds were then used to construct a composite Kevlar/Nomex honeycomb/Kevlar body using a high temperature vacuum bagging technique, in an autoclave at a temperature of 175°C. The details of the construction process are described. Experiments were conducted on samples to test various mechanical properties of the finished product.

A Computational Fluid Dynamics (CFD) study was conducted on four-vehicle platoons, and the aerodynamic data is then coupled with a high-fidelity truck simulation software (TruckSim) to determine fuel efficiency. Previous studies typically have focused on identical two vehicle platoons, whereas this study accounted for more complex platoon configurations. Heavy duty vehicles (HDVs), both military and commercial, make up a significant percentage of fuel consumption. This study aimed to quantify fuel savings of a platoon consisting of dissimilar trucks and trailers, thus reducing vehicle operational cost. The vehicle platoon featured two M915 trucks and two Peterbilt 579 trucks with dissimilar trailer configurations. An unloaded flatbed trailer, a centered 20 ft shipping container, two 20 ft shipping containers, and a 53 ft box trailer configurations were utilized.

At 70 miles per hour, overcoming aerodynamic drag represents about 65% of the total energy expenditure for a typical heavy truck vehicle. The goal of this US Department of Energy supported consortium is to establish a clear understanding of the drag producing flow phenomena. This is being accomplished through joint experiments and computations, leading to the intelligent design of drag reducing devices. This paper will describe our objective and approach, provide an overview of our efforts and accomplishments related to drag reduction devices, and offer a brief discussion of our future direction.