Quote:
Originally Posted by pasadena_commut
...will the pressure of the air coming out of the two hole have to be to for the force of the air coming out of the holes to equal the force on the back of the car due to negative pressure?
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No. But I never suggested it would. Rather, I said it probably couldn't be measured by any tests I am willing to run. You quote me responding to your comment about "what keeps the fumes out" as if I was discussing the aerodynamic advantages. I wasn't. Instead, I was answering your question, which was already answered in my very first post in the thread.
So here are your first two questions, which I answered before you asked them:
1. What keeps the fumes out?
2. Will it make a measureable difference?
Yes, it will keep the fumes out (see first post). You would have to keep the fan
on. And yes, it can be measured, but I probably won't get enough samples to capture the difference (see first post), so it won't be measurable thereby. Logic tells us that it will make a difference. A lot of small differences can make a big difference.