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Message: <blockquote data-quote="eyong" data-source="post: 1171060" data-attributes="member: 23540"><p>No need wind tunnel. Got a much cheaper alternative and crude, but been time tested over the decades.</p><p></p><p>First you need a couple rolls of 1/2" ribbons (pink, or bright colours).</p><p></p><p>Second, a couple rolls of sticky tapes, or cellophane tape.</p><p></p><p>Three, a digital camera.</p><p></p><p>Four the subject car.</p><p></p><p>Five another car.</p><p></p><p>Six, couple of keen mates.</p><p></p><p>Seven, a long stretch of road.</p><p></p><p>Stick little 2" x 1/2 " ribbon strips all over the subject car in proper even order with approx 1 1/2" of the ribbon loose.</p><p></p><p>Drive at constant speed (about 60km/hr will do).</p><p></p><p>Take a whole bunch of pictures from your mates car travelling along side, front, and back. Analysis the ribbon response to the wind around subject car. You will see the general aerodynamic flow (fluid flowing) around the subject car's body.</p><p></p><p>And have a good laugh on how silly your car looks on Federal Highway ...</p></blockquote><p></p>

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