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Originally Posted by theunchosen
I'm in that fluids group so I have questions.
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Great, thanks for asking & having an open mind... some folks tell me this is "impossible" (despite the successful flight, wind tunnel and CFD tests) and move on.
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Has this been tested on something today and can I see pictures of all of its components?
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Yup, there is a list of technical papers at the bottom of my site
Pressure Thrust
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How much vacuum is needed to create a sufficiently low pressure upstream of your concavity(a surface that curves inward is a concavity convex surface bows outward)?
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It depends.. for the image at the bottom of page 2 of this thread, I think the pressure was around 1200 pascals. Should be within the reach of a fairly simple utility blower. That was with the car going 60-65MPH (I forget which).
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the idea is to slow the air down enough that it "falls" along the curve pushing the car forward?
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The suction keeps the flow attached across the strong pressure gradient of the concavity. That stagnation & the concave shape that creates it generate the aerodynamic pressure thrust.
I'm sure there is a way to describe this in terms of circulation theory but I'm just not that smart. :-]
-Dave B