Honda's HALO facility is the 'world's most advanced' wind tunnel
 

Regular readers of Engadget may have noticed that much of our EV reviews and coverage makes mention of the vehicle's drag coefficient. It's a handy indicator that measures the ratio of the drag force to the force produced by the dynamic pressure times the area — essentially, the lower the drag coefficient, the less drag the vehicle produces and the more efficiently it pushes through air.

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