This section aims to present practical methods for measuring data relating to the aerodynamics of electric vehicles. This data may aid in flow visualisation, design of aerodynamic modifications, testing the effectiveness of modifications, determining power requirements, vehicle efficiencies and more. These testing methods should be relevant and accessibly to the average EV hobbyist (so wind-tunnel testing and expensive computer simulations are outside the scope of this wiki).
Measuring the Coefficient of Drag (Roll Down Testing) This link describes in some detail how to accurately measure the coefficient of drag and rolling resistance of your vehicle using a simple roll down test from 70mph (120km/h): http://www.instructables.com/id/S41H3Y4F5Y3TMFX/
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