Psst.. you wanna know how to test your car’s aerodynamics in a wind tunnel without using an actual wind tunnel at all? It turns out that all you need is an empty and open road, some smoke grenades, and a few video cameras.
Now, the road needs to be long enough to allow you to build up a good amount of speed. You’ll need to have enough smoke grenades to cover much of that road with colored smoke.
And, finally, you will need to post your video cameras along the route to ensure that they capture the way the colored smoke that is held aloft by the air that your car will be traveling through flows across your car’s surface. To learn more about this DIY car aerodynamics test with smoke grenades along with the method using flow-visualization paint.
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