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Old 06-17-2017, 04:03 PM   #21 (permalink)
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Hard to tell from the image. They appear to be inclined towards the center of the car making the outside the downstream vortex generation side. If this is so, then they are causing a counter-rotating vortex that would travel down the back window forming a curtain therefore reducing the effect of the vortices formed as the air comes around the back of the C pillar. An aerodynamic kam... but appearances are deceiving.

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Old 06-17-2017, 04:13 PM   #22 (permalink)
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logic

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Originally Posted by freebeard View Post
I'd like to know the logic behind the jumbo hinge covers. If it involves vortices, it would seem it would most likely be located at the edge between the roof top and side.
Unless Honda actually reports on it we may never know if there's any actual utility to the feature,or just a styling gimmick.
It smells of some mistake discovered late in the R&D game,and an attempt to fix it with a Band-Aid different from someone else's patented Band-Aid.
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Old 06-18-2017, 12:15 AM   #23 (permalink)
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Quote:
Originally Posted by aerohead View Post
Unless Honda actually reports on it we may never know if there's any actual utility to the feature,or just a styling gimmick.
It smells of some mistake discovered late in the R&D game,and an attempt to fix it with a Band-Aid different from someone else's patented Band-Aid.
Or a concession to some interior volume target (it's worth noting that the hatch is a full 5" shorter than the sedan on the same wheelbase). The sedan and coupe, with more tumblehome and a shallower rear glass angle, have no such gimmicky add-ons.
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Old 06-18-2017, 12:18 AM   #24 (permalink)
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I miss chrome, external trunk hinges.
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Old 06-18-2017, 07:46 AM   #25 (permalink)
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I miss chrome, external trunk hinges.
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Old 06-19-2017, 10:25 AM   #26 (permalink)
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Originally Posted by aerohead View Post
Bob,if you can locate a Tesla S take a gander at what they've done under the nose with the leading edge of the front wheel hour-glass openings.
They've got angled fairings to create this 'jump' and re-attachment beyond the rearward termination of the opening.
The scale of the fairing,with respect to the size of the opening may suggest something about 'sizing' and angles.
This is 'underbody' flow,and it's complicated with the ground plane,but it would be a beginning point perhaps.
Hey Phil -

Thanks much for the input. I eyeballed some images of the Model S but it was not blatantly obvious to the feature that you are referring to. Like you said, I'll have to see this in person to get a feel for it.

I did find a cool image of the Model S steering tire wheel well.



They also have a cool video on the mirror drag. According to Tesla rear-view mirrors are said to increase aerodynamic drag between 3 to 6 percent. Wheels can generate an additional 20% of drag.

“One of the objectives with the Model S was to minimize the airflow around the front wheels and to line up the airflow so it hits the front wheels head on. We needed to avoid air hitting at an angle, as often the side of the tire acts like a bucket that catches the air, producing significant drag. This was an area where we made a huge improvement from the initial concept designs to the final design.”


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