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Old 06-12-2017, 01:49 AM   #21 (permalink)
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That very last inmate looks like it would be a variation of what I could do. If I'm understanding correctly, I need the car to have a more abrubt sharp corner for the air to exit comparied to the curved original design?

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Old 06-12-2017, 08:02 PM   #22 (permalink)
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The fluid tail Fiat has a lot going on. It is a box cavity like the prior example but it is oval instead of square cornered. The screen with the half-circular cutout is the perforated base plate. There are also centrifugal fans built into the wheels to pump air into the lower corners of the cavity to compensate for the wake of the tires.

Here is aerohead's explanation of 'tearing edges':


The idea is that in buffeting side winds the point of separation is fixed instead of wandering around. You can see an example by comparing the latest Prius to earlier models.
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Old 06-13-2017, 08:27 AM   #23 (permalink)
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Quote:
Originally Posted by freebeard View Post
Here is aerohead's explanation of 'tearing edges':.........
I've not heard that term before, excellent diagram - thanks for posting it.
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Old 06-13-2017, 10:41 AM   #24 (permalink)
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Pace aerohead, 'Koenig-Fachsenfeld tearing edges'.

beetle kammback

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