Optimizing the profile design of a vehicle body for minimum drag coefficient can have a beneficial impact upon the vehicle performance, energy conservation, and exhaust gas emissions. An interactive technique based on the fundamental concepts of Bezier equations was utilized to develop the body profile and its corresponding drag coefficient. The technique described could be used by automobiles, submarines, and aircraft designers. Since the technique is interactive, the profile can be changed and tested again, allowing flexibility to produce the desired shape for the designer. The cubic four point Bezier curve utilizes four control points of which the two end points are fixed to the curve and the other two are used to interpolate the smooth profile. The governing principles of aerodynamics are used to develop the algorithm for the optimization process. A feature of this algorithm is that it accounts for the turbulence of the wind at its interface with the structure.

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