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What does that mean if airflow is detached?
At this point I have completed the tail to the point that it can be securely fastened to the car. The next step is to go to work with some white duct tape and try to fair it to the car's body and to cover the zip tie heads to try to smooth the thing out.
I don't expect that this box will be 98% efficient, since it has corners and is not rounded like a true aerodynamic form. But it is removable and was relatively easy to build. After I smooth the thing out a bit I will do more drive testing and see if it provides some benefit over the stock design. I am hoping for a 20% increase in fuel efficiency at highway speeds. That would get me from 30mpg to 36mpg at 70mph.
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